The variable _ is either undeclared or was never assigned error

The variable _ is either undeclared or was never assigned error - c#

I'm using Visual Studio 2017 and I've encountered this error everytime I try to open the NewComponentForm.cs[Design].
I've looked up this error and everyone says that you should clean your solution and rebuild and restart the VS application. In my case it didn't help at all.
So this is some legacy code that I need to add functionality, it works by having like 5 Views in a form and just changing the Visible attribute with the help of some buttons, the error is:
The variable 'LoadRemoteDescriptorsView' is either undeclared or was never assigned.
It seems that LoadRemoteDescriptorsView view was added manually (by code and not by the designer) to the component, because everytime I add a button or some other control the code for LoadRemoteDescriptorsView dissapears.
This is a snippet of the code. NOTE: the program runs fine even if I select 'Ignore and Continue' when the error pops.
partial class NewComponentForm
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.PlatformButton = new System.Windows.Forms.Button();
this.panel1 = new System.Windows.Forms.Panel();
this.LoadRemoteDescriptorsButton = new System.Windows.Forms.Button();
this.EditDeviceAmplifierButton = new System.Windows.Forms.Button();
this.AddDeviceToAmplifierButton = new System.Windows.Forms.Button();
this.ComponentPanel = new System.Windows.Forms.Panel();
this.LoadRemoteDescriptorsView = new ExamplePlugins.DeviceMapper.View.LoadRemoteDescriptors();
//LoadRemoteDescriptorsView = new LoadRemoteDescriptors();
this.EditAmplifierDeviceOptionsView = new ExamplePlugins.DeviceMapper.View.EditAmplifierDeviceOptions();
this.MainAcceptCancelButtonsPanel = new System.Windows.Forms.Panel();
this.AcceptButton = new System.Windows.Forms.Button();
this.CancelButton = new System.Windows.Forms.Button();
this.NewAmplifierView = new ExamplePlugins.DeviceMapper.View.NewAmplifier();
this.AddDeviceToAmplifierView = new ExamplePlugins.DeviceMapper.View.AddDeviceToAmplifier();
this.NewDeviceView = new ExamplePlugins.DeviceMapper.View.NewDevice();
this.DeviceButton = new System.Windows.Forms.Button();
this.btnRegSettings = new System.Windows.Forms.Button();
this.panel1.SuspendLayout();
this.ComponentPanel.SuspendLayout();
this.MainAcceptCancelButtonsPanel.SuspendLayout();
this.SuspendLayout();
/*****/
/*****/SOME OTHER CODE HERE
/*****/
/*****/
//
// ComponentPanel
//
this.ComponentPanel.Controls.Add(this.LoadRemoteDescriptorsView); //Added
this.ComponentPanel.Controls.Add(this.EditAmplifierDeviceOptionsView);
this.ComponentPanel.Controls.Add(this.MainAcceptCancelButtonsPanel);
this.ComponentPanel.Controls.Add(this.NewAmplifierView);
this.ComponentPanel.Controls.Add(this.AddDeviceToAmplifierView);
this.ComponentPanel.Controls.Add(this.NewDeviceView);
this.ComponentPanel.Location = new System.Drawing.Point(116, 2);
this.ComponentPanel.Margin = new System.Windows.Forms.Padding(2, 2, 2, 2);
this.ComponentPanel.Name = "ComponentPanel";
this.ComponentPanel.Size = new System.Drawing.Size(803, 515);
this.ComponentPanel.TabIndex = 4;
//*******************************************************************************//
//
// LoadRemoteDescriptorsView
//
this.LoadRemoteDescriptorsView.Location = new System.Drawing.Point(19, 0);
this.LoadRemoteDescriptorsView.Name = "LoadRemoteDescriptorsView";
this.LoadRemoteDescriptorsView.Size = new System.Drawing.Size(670, 318);
this.LoadRemoteDescriptorsView.TabIndex = 8;
this.LoadRemoteDescriptorsView.Visible = false;
//*******************************************************************************//
//
LoadRemoteDescriptorsView is declared early in the InitializeComponent() function
this.LoadRemoteDescriptorsView = new ExamplePlugins.DeviceMapper.View.LoadRemoteDescriptors();
The error points to the line when we are adding that view to the component panel
this.ComponentPanel.Controls.Add(this.LoadRemoteDescriptorsView); //Added
What am I missing out here?

Related

Need help linking navigation pages to navigation bar (Windows Forms/DevExpress)

I'm working through the following tutorial:
https://documentation.devexpress.com/WindowsForms/116628/Build-an-Application/Choose-Application-UI/Office-Inspired-UI/How-to-Build-an-Office-inspired-UI-manually
I've achieved the desired output at step 8 (linking the office navigation bar and navigation bar controls), but I'm having trouble achieving the desired output at step 10 (changing the navigation page to display the different labels depending on the selected navigation bar group).
Here's my Form1.Designer.cs:
namespace dev_express_again
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.navigationFrame1 = new DevExpress.XtraBars.Navigation.NavigationFrame();
this.navigationPage1 = new DevExpress.XtraBars.Navigation.NavigationPage();
this.labelControl1 = new DevExpress.XtraEditors.LabelControl();
this.navigationPage2 = new DevExpress.XtraBars.Navigation.NavigationPage();
this.labelControl2 = new DevExpress.XtraEditors.LabelControl();
this.navBarControl1 = new DevExpress.XtraNavBar.NavBarControl();
this.navBarGroup1 = new DevExpress.XtraNavBar.NavBarGroup();
this.navBarGroup2 = new DevExpress.XtraNavBar.NavBarGroup();
this.officeNavigationBar1 = new DevExpress.XtraBars.Navigation.OfficeNavigationBar();
((System.ComponentModel.ISupportInitialize)(this.navigationFrame1)).BeginInit();
this.navigationFrame1.SuspendLayout();
this.navigationPage1.SuspendLayout();
this.navigationPage2.SuspendLayout();
((System.ComponentModel.ISupportInitialize)(this.navBarControl1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.officeNavigationBar1)).BeginInit();
this.SuspendLayout();
//
// navigationFrame1
//
this.navigationFrame1.Controls.Add(this.navigationPage1);
this.navigationFrame1.Controls.Add(this.navigationPage2);
this.navigationFrame1.Location = new System.Drawing.Point(146, 0);
this.navigationFrame1.Name = "navigationFrame1";
this.navigationFrame1.Pages.AddRange(new DevExpress.XtraBars.Navigation.NavigationPageBase[] {
this.navigationPage1,
this.navigationPage2});
this.navigationFrame1.SelectedPage = this.navigationPage1;
this.navigationFrame1.Size = new System.Drawing.Size(462, 311);
this.navigationFrame1.TabIndex = 0;
this.navigationFrame1.Text = "navigationFrame1";
//
// navigationPage1
//
this.navigationPage1.Caption = "navigationPage1";
this.navigationPage1.Controls.Add(this.labelControl1);
this.navigationPage1.Name = "navigationPage1";
this.navigationPage1.Size = new System.Drawing.Size(462, 311);
this.navigationPage1.Tag = "Employees";
//
// labelControl1
//
this.labelControl1.Location = new System.Drawing.Point(190, 145);
this.labelControl1.Name = "labelControl1";
this.labelControl1.Size = new System.Drawing.Size(33, 13);
this.labelControl1.TabIndex = 0;
this.labelControl1.Text = "Page 1";
//
// navigationPage2
//
this.navigationPage2.Caption = "navigationPage2";
this.navigationPage2.Controls.Add(this.labelControl2);
this.navigationPage2.Name = "navigationPage2";
this.navigationPage2.Size = new System.Drawing.Size(462, 311);
this.navigationPage2.Tag = "Customers";
//
// labelControl2
//
this.labelControl2.Location = new System.Drawing.Point(194, 135);
this.labelControl2.Name = "labelControl2";
this.labelControl2.Size = new System.Drawing.Size(33, 13);
this.labelControl2.TabIndex = 0;
this.labelControl2.Text = "Page 2";
//
// navBarControl1
//
this.navBarControl1.ActiveGroup = this.navBarGroup1;
this.navBarControl1.Groups.AddRange(new DevExpress.XtraNavBar.NavBarGroup[] {
this.navBarGroup1,
this.navBarGroup2});
this.navBarControl1.Location = new System.Drawing.Point(0, 0);
this.navBarControl1.Name = "navBarControl1";
this.navBarControl1.OptionsNavPane.ExpandedWidth = 140;
this.navBarControl1.PaintStyleKind = DevExpress.XtraNavBar.NavBarViewKind.NavigationPane;
this.navBarControl1.Size = new System.Drawing.Size(140, 311);
this.navBarControl1.TabIndex = 1;
this.navBarControl1.Text = "navBarControl1";
//
// navBarGroup1
//
this.navBarGroup1.Caption = "Employees";
this.navBarGroup1.Expanded = true;
this.navBarGroup1.Name = "navBarGroup1";
//
// navBarGroup2
//
this.navBarGroup2.Caption = "Customers";
this.navBarGroup2.Name = "navBarGroup2";
//
// officeNavigationBar1
//
this.officeNavigationBar1.Dock = System.Windows.Forms.DockStyle.Bottom;
this.officeNavigationBar1.Location = new System.Drawing.Point(0, 317);
this.officeNavigationBar1.Name = "officeNavigationBar1";
this.officeNavigationBar1.NavigationClient = this.navBarControl1;
this.officeNavigationBar1.Size = new System.Drawing.Size(608, 45);
this.officeNavigationBar1.TabIndex = 2;
this.officeNavigationBar1.Text = "officeNavigationBar1";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(608, 362);
this.Controls.Add(this.officeNavigationBar1);
this.Controls.Add(this.navBarControl1);
this.Controls.Add(this.navigationFrame1);
this.Name = "Form1";
this.Text = "Form1";
((System.ComponentModel.ISupportInitialize)(this.navigationFrame1)).EndInit();
this.navigationFrame1.ResumeLayout(false);
this.navigationPage1.ResumeLayout(false);
this.navigationPage1.PerformLayout();
this.navigationPage2.ResumeLayout(false);
this.navigationPage2.PerformLayout();
((System.ComponentModel.ISupportInitialize)(this.navBarControl1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.officeNavigationBar1)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private DevExpress.XtraBars.Navigation.NavigationFrame navigationFrame1;
private DevExpress.XtraBars.Navigation.NavigationPage navigationPage1;
private DevExpress.XtraBars.Navigation.NavigationPage navigationPage2;
private DevExpress.XtraNavBar.NavBarControl navBarControl1;
private DevExpress.XtraNavBar.NavBarGroup navBarGroup1;
private DevExpress.XtraNavBar.NavBarGroup navBarGroup2;
private DevExpress.XtraBars.Navigation.OfficeNavigationBar officeNavigationBar1;
private DevExpress.XtraEditors.LabelControl labelControl1;
private DevExpress.XtraEditors.LabelControl labelControl2;
}
}
And my Form1.cs:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace dev_express_again
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
navigationPage1.Tag = navBarGroup1.Caption = navigationPage1.Caption = "Employees";
navigationPage2.Tag = navBarGroup2.Caption = navigationPage2.Caption = "Customers";
officeNavigationBar1.NavigationClient = navBarControl1;
}
private void navBarControl1_ActiveGroupChanged(object sender, DevExpress.XtraNavBar.NavBarGroupEventArgs e)
{
navigationFrame1.SelectedPage = (DevExpress.XtraBars.Navigation.NavigationPage)navigationFrame1.Pages.FindFirst(x => (string)x.Tag == e.Group.Caption);
}
}
}
Both are exactly the same as the tutorial, as far as I can see. When I run the code, I get a window that looks exactly like the one in the tutorial. When I change the selection in the office navigation bar, it reflects in the navigation bar control, but does not change the navigation page.
Any ideas as to what I'm missing?

Figured out the solution. The tutorial neglected to mention that you also must add the line navBarControl1.ActiveGroupChanged += new DevExpress.XtraNavBar.NavBarGroupEventHandler(navBarControl1_ActiveGroupChanged); to Form1.cs in order to enable the user's changing of the active group to actually call the navBarControl1_ActiveGroupChanged function.

How to use custom class with dynamic compilation

I have a form that i dynamicly compiled and i have a style class. When i copy this style class to my form source and compile it all works fine. But how can i use this style class without copy it to my form source. My main program that compile this form has this class, how can i use it? Maybe i can pass style class to this for with i compile it, like a var?
Program source:
using System;
using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.IO;
using System.Threading;
using System.Windows.Forms;
using Microsoft.CSharp;
namespace dynamic
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
new Thread(newForm).Start();
}
public void newForm()
{
using (CSharpCodeProvider provider = new CSharpCodeProvider(new Dictionary<string, string>
{
{"CompilerVersion", "v4.0"}
}))
{
var parameters = new CompilerParameters
{
GenerateExecutable = false, // Create a dll
GenerateInMemory = true, // Create it in memory
WarningLevel = 3, // Default warning level
CompilerOptions = "/optimize", // Optimize code
TreatWarningsAsErrors = false // Better be false to avoid break in warnings
};
parameters.ReferencedAssemblies.Add("mscorlib.dll");
parameters.ReferencedAssemblies.Add("System.dll");
parameters.ReferencedAssemblies.Add("System.Core.dll");
parameters.ReferencedAssemblies.Add("System.Data.dll");
parameters.ReferencedAssemblies.Add("System.Drawing.dll");
parameters.ReferencedAssemblies.Add("System.Xml.dll");
parameters.ReferencedAssemblies.Add("System.Windows.Forms.dll");
var source = File.ReadAllText("form.txt");
CompilerResults results = provider.CompileAssemblyFromSource(parameters, source);
Type type = results.CompiledAssembly.GetType("myForm.Form1");
object compiledObject = Activator.CreateInstance(type);
type.GetMethod("ShowDialog", new Type[0]).Invoke(compiledObject, new object[] {});
MessageBox.Show("formClosed");
}
}
}
}
Style folder:
Form source:
using System;
using System.Windows.Forms;
namespace myForm
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
var newTmr = new Timer { Interval = 1000 };
newTmr.Tick += count;
newTmr.Enabled = true;
}
private void count(Object myObject, EventArgs myEventArgs)
{
timer.Value2 = (Int32.Parse(timer.Value2) + 1).ToString();
}
private void button1_Click(object sender, System.EventArgs e)
{
MessageBox.Show("clicked");
}
private void nsButton1_Click(object sender, EventArgs e)
{
MessageBox.Show("button");
}
}
}
namespace myForm
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.nsTheme1 = new myForm.NSTheme();
this.nsButton1 = new myForm.NSButton();
this.timer = new myForm.NSLabel();
this.nsControlButton1 = new myForm.NSControlButton();
this.nsTheme1.SuspendLayout();
this.SuspendLayout();
//
// nsTheme1
//
this.nsTheme1.AccentOffset = 0;
this.nsTheme1.BackColor = System.Drawing.Color.FromArgb(((int)(((byte)(50)))), ((int)(((byte)(50)))), ((int)(((byte)(50)))));
this.nsTheme1.BorderStyle = System.Windows.Forms.FormBorderStyle.None;
this.nsTheme1.Colors = new myForm.Bloom[0];
this.nsTheme1.Controls.Add(this.nsControlButton1);
this.nsTheme1.Controls.Add(this.timer);
this.nsTheme1.Controls.Add(this.nsButton1);
this.nsTheme1.Customization = "";
this.nsTheme1.Dock = System.Windows.Forms.DockStyle.Fill;
this.nsTheme1.Font = new System.Drawing.Font("Verdana", 8F);
this.nsTheme1.Image = null;
this.nsTheme1.Location = new System.Drawing.Point(0, 0);
this.nsTheme1.Movable = true;
this.nsTheme1.Name = "nsTheme1";
this.nsTheme1.NoRounding = false;
this.nsTheme1.Sizable = true;
this.nsTheme1.Size = new System.Drawing.Size(284, 274);
this.nsTheme1.SmartBounds = true;
this.nsTheme1.StartPosition = System.Windows.Forms.FormStartPosition.WindowsDefaultLocation;
this.nsTheme1.TabIndex = 0;
this.nsTheme1.Text = "nsTheme1";
this.nsTheme1.TransparencyKey = System.Drawing.Color.Empty;
this.nsTheme1.Transparent = false;
//
// nsButton1
//
this.nsButton1.Location = new System.Drawing.Point(100, 166);
this.nsButton1.Name = "nsButton1";
this.nsButton1.Size = new System.Drawing.Size(75, 23);
this.nsButton1.TabIndex = 0;
this.nsButton1.Text = "nsButton1";
this.nsButton1.Click += new System.EventHandler(this.nsButton1_Click);
//
// timer
//
this.timer.Font = new System.Drawing.Font("Segoe UI", 11.25F, System.Drawing.FontStyle.Bold);
this.timer.Location = new System.Drawing.Point(91, 82);
this.timer.Name = "timer";
this.timer.Size = new System.Drawing.Size(101, 23);
this.timer.TabIndex = 1;
this.timer.Text = "nsLabel1";
this.timer.Value1 = "Timer: ";
this.timer.Value2 = "0";
//
// nsControlButton1
//
this.nsControlButton1.Anchor = ((System.Windows.Forms.AnchorStyles)((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Right)));
this.nsControlButton1.ControlButton = myForm.NSControlButton.Button.Close;
this.nsControlButton1.Location = new System.Drawing.Point(262, 4);
this.nsControlButton1.Margin = new System.Windows.Forms.Padding(0);
this.nsControlButton1.MaximumSize = new System.Drawing.Size(18, 20);
this.nsControlButton1.MinimumSize = new System.Drawing.Size(18, 20);
this.nsControlButton1.Name = "nsControlButton1";
this.nsControlButton1.Size = new System.Drawing.Size(18, 20);
this.nsControlButton1.TabIndex = 2;
this.nsControlButton1.Text = "nsControlButton1";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(284, 274);
this.Controls.Add(this.nsTheme1);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
this.Name = "Form1";
this.Text = "Form1";
this.nsTheme1.ResumeLayout(false);
this.ResumeLayout(false);
}
#endregion
private NSTheme nsTheme1;
private NSButton nsButton1;
private NSControlButton nsControlButton1;
private NSLabel timer;
}
}
Style source:
http://pastebin.com/CjmQQ9ND
Project source - https://yadi.sk/d/ChtMacrsraD4g
If you compile this source, all will work fine. That because i use style at form.txt file. I separated form from style at form.txt file. I have this style at my main program (you can see that at screenshot). How can i send this style class to my dynamicly compiled form, so form can use it.

You should be able to simply append the style to the source like so:
var source = File.ReadAllText("form.txt");
source += Environment.NewLine;
source += File.ReadAllText("style.txt");

Inside Form.txt file instead of the classes in order prescribes the macro:
namespace myForm
{
<%THEME%>
}
namespace myForm
{
<%THEMEBASE%>
}
Before compile, load style files and replace them in the code form:
//Load style files
var NSThemeSource = File.ReadAllText(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, #"..\..\Class\Style\NSTheme.cs"));
var themeBaseSource = File.ReadAllText(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, #"..\..\Class\Style\ThemeBase154.cs"));
var source = File.ReadAllText(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Form.txt"));
//Substitute in the form styles
source = source.Replace("<%THEME%>", NSThemeSource);
source = source.Replace("<%THEMEBASE%>", themeBaseSource);
P.S.
You can switch build action for style files at Embedded Resource so you can get style class from exe.
And use this helper - http://www.vcskicks.com/embedded-resource.php
Than you need to change code to:
var NSThemeSource = ResourceHelper.GetEmbeddedResource("Class/Style/NSTheme.cs");
var themeBaseSource = ResourceHelper.GetEmbeddedResource("Class/Style/ThemeBase154.cs");

First, you need to make classes, enums, and etc. public in NSTheme.cs and ThemeBase154.cs.
(it is better to put into some namespace, rather than having them in the global (dynamic) namespace).
Then, add parameters.ReferencedAssemblies.Add("dynamic.exe"); to you exe file (you might want to put your styles in a separate dll).
After it, in your form.txt add using dynamic; and remove qualifiers from new myForm.NSTheme() (so, it becomes new NSTheme()).
Now you can use your styles without coping them to your form class.
In case you miss something, check the CompilerResults results errors for particular problems.

Stack overflow in Designer.cs

A stack overflow is occurring in the auto-generated code for my winform. It happens only at the start of the auto-generated code for the form, not any of the controls in it. I tried removing the first line, and it happened on the next one. There is no stack trace or inner exception, please help.
EDIT
Here is my code for the form:
namespace Eternal_Continent
{
public partial class Almanac : Form
{
public Almanac()
{
InitializeComponent();
}
public List<string> Content = new List<string>();
private void Almanac_Load(object sender, EventArgs e)
{
timer1.Interval = 5000;
PrivateFontCollection pfc = new PrivateFontCollection();
pfc.AddFontFile(Application.StartupPath + "\\Resources\\font_name.ttf");
textBox1.Font = new Font(pfc.Families[0], 36);
}
private void Almanac_FormClosing(object sender, FormClosingEventArgs e)
{
e.Cancel = true;
Hide();
}
}
}
And here is the designer's:
namespace Eternal_Continent
{
partial class Almanac
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Almanac));
this.textBox1 = new System.Windows.Forms.TextBox();
this.timer1 = new System.Windows.Forms.Timer(this.components);
this.SuspendLayout();
//
// textBox1
//
this.textBox1.BackColor = System.Drawing.Color.Khaki;
this.textBox1.BorderStyle = System.Windows.Forms.BorderStyle.None;
this.textBox1.Dock = System.Windows.Forms.DockStyle.Fill;
this.textBox1.Location = new System.Drawing.Point(0, 0);
this.textBox1.Multiline = true;
this.textBox1.Name = "textBox1";
this.textBox1.ReadOnly = true;
this.textBox1.Size = new System.Drawing.Size(546, 582);
this.textBox1.TabIndex = 0;
//
// timer1
//
this.timer1.Enabled = true;
//
// Almanac
// I removed the autoscale lines here, because I wanted to see if it would still create errors, it did
this.BackgroundImage = Properties.Resources.Stone;
this.ClientSize = new System.Drawing.Size(546, 582);
this.Controls.Add(this.textBox1);
this.Icon = Properties.Textures.EternalContinent1;
this.MaximizeBox = false;
this.MinimizeBox = false;
this.Name = "Almanac";
this.Text = "Almanac";
this.FormClosing += new System.Windows.Forms.FormClosingEventHandler(this.Almanac_FormClosing);
this.Load += new System.EventHandler(this.Almanac_Load);
this.ResumeLayout(false);
this.PerformLayout();
this.Dispose();
}
#endregion
private System.Windows.Forms.Timer timer1;
public System.Windows.Forms.TextBox textBox1;
}
}
EDIT #2
Removing the Dispose() line causes
The current process has used all of its system allowance of handles for Window Manager objects
in my Resources.Designer.cs.

I tried your code and I got an ObjectDisposed exception. On debugging it turns out that your Auto-generated code has the last line as this.Dispose(), which is incorrect.
Once I deleted that line (last line of InitializeComponent() ) the designer and the code worked fine without any errors
Note that I had to comment out the below lines related to the resources since I do not have that in my project & file-system
// Almanac.cs
pfc.AddFontFile(Application.StartupPath + "\\Resources\\font_name.ttf");
// Almanac.Designer.cs
this.BackgroundImage = Properties.Resources.Stone;
this.Icon = Properties.Textures.EternalContinent1;
You should also comment out these lines from your code to make sure you get the same results as I get, and then include them one at a time to make sure they are not causing any issues
NOTE: I am using VS 2013 on Win 7

Often this will be down to accidental, indirect recursion. I have an old answer here that might help: https://stackoverflow.com/a/4734422/26414
It's also worth noting that if you step through using F11 you might see the looping pattern that tells you what's what. Be aware of which thread you're debugging, too. I believe you get a darker yellow highlight for the current line when stepping-through, if there are multiple threads with user code executing.

JumpList in C# application (recent files)

At the moment I am developing an application and want to add a Windows (7) JumpList. I followed several tutorials and studied documentation, but I can't figure out how to get the job done. In short: I want a recent list of last choosen files. So after closing the app, the user can easily open a recent file with my application. I already implemented some file association mechanism.
Is it possible to share some code/ tutorial how I can solve above problem?
Thank you in advance!
*I already tried the next few projects/ tutorials:
http://www.codeproject.com/Articles/103913/How-to-Create-a-Custom-Jumplist-with-Custom-Events
http://channel9.msdn.com/coding4fun/articles/Windows-7-Jump-Lists
http://csharp-tricks-en.blogspot.nl/2011/10/create-jumplist-using-c.html
*The code of Coding 4 Fun works, but I don't know how to develop a recent file list.

You can check out this article. Instead of showing result in WPF you need to show it in jumplist.
Why dont you try storing the recently opened file names in a database or an xml file and read it to set the jumplist. For eg.
private void ReportUsage()
{
XmlDocument myXml = new XmlDocument();
myXml.Load(historyXml);
string list = historyXml;
jumpList.ClearAllUserTasks();
foreach (XmlElement el in myXml.DocumentElement.ChildNodes)
{
string s = el.GetAttribute("url");
JumpListLink jll = new JumpListLink(Assembly.GetEntryAssembly().Location, s);
jll.IconReference = new IconReference(Path.Combine("C:\\Program Files\\ACS Digital Media\\TOC WPF Browser\\Icon1.ico"), 0);
jll.Arguments = el.GetAttribute("url");
jumpList.AddUserTasks(jll);
}
jumpList.Refresh();
}
Or a beginners solution will be retain all the file paths into a Queue of given maximum capacity and adding them at run-time into a menuItem. Sorry I didnt have time to write the whole code.

As it is described in your second article, your application must be registered as a handler for targeted file extension, otherwise the recent category for your Jumplist won't show up. You can find more details about file association registration there.
You can either manually register your application but you will need admin right so it is not recommended, or create a setup project for your application like described in the coding 4 fun article, or you can let the user associate the file extension.
Here is a sample which works for me under Windows Seven without registration, by just right clicking the text file I want to load and choosing "Open With" and browse to my application.
The sample require Windows API Code Pack
public partial class Form1 : Form
{
[STAThread]
static void Main(string[] args)
{
var file = args != null && args.Length > 0 ? args[0] : string.Empty;
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1(file));
}
public Form1()
: this(string.Empty)
{
}
public Form1(string file)
{
InitializeComponent();
Open(file);
}
[DllImport("user32.dll")]
private static extern uint RegisterWindowMessage(string message);
private uint wmTBC;
/// <summary>
/// Registers the window message for notification when the taskbar button is created.
/// </summary>
/// <param name="e">The event args.</param>
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
wmTBC = RegisterWindowMessage("TaskbarButtonCreated");
}
/// <summary>
/// Handles the window message for notification of the taskbar button creation.
/// </summary>
/// <param name="m">The window message.</param>
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == wmTBC)
{
OnTaskbarButtonCreated();
}
}
/// <summary>
/// Override this method to recieve notification when the taskbar button is created on Windows 7 machines and above.
/// </summary>
protected void OnTaskbarButtonCreated()
{
if (TaskbarManager.IsPlatformSupported)
{
jumpList = JumpList.CreateJumpList();
jumpList.KnownCategoryToDisplay = JumpListKnownCategoryType.Recent;
jumpList.Refresh();
}
}
JumpList jumpList;
private void openToolStripMenuItem1_Click(object sender, EventArgs e)
{
using (OpenFileDialog ofd = new OpenFileDialog())
{
if (ofd.ShowDialog() == DialogResult.OK)
{
Open(ofd.FileName);
}
}
}
private void Open(string file)
{
try
{
if (!string.IsNullOrEmpty(file) && File.Exists(file))
{
textBox1.Text = File.ReadAllText(file);
if (TaskbarManager.IsPlatformSupported)
{
jumpList.AddToRecent(file);
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.textBox1 = new System.Windows.Forms.TextBox();
this.menuStrip1 = new System.Windows.Forms.MenuStrip();
this.openToolStripMenuItem = new System.Windows.Forms.ToolStripMenuItem();
this.openToolStripMenuItem1 = new System.Windows.Forms.ToolStripMenuItem();
this.menuStrip1.SuspendLayout();
this.SuspendLayout();
//
// textBox1
//
this.textBox1.Location = new System.Drawing.Point(12, 27);
this.textBox1.Multiline = true;
this.textBox1.Name = "textBox1";
this.textBox1.Size = new System.Drawing.Size(796, 306);
this.textBox1.TabIndex = 0;
//
// menuStrip1
//
this.menuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
this.openToolStripMenuItem});
this.menuStrip1.Location = new System.Drawing.Point(0, 0);
this.menuStrip1.Name = "menuStrip1";
this.menuStrip1.Size = new System.Drawing.Size(820, 24);
this.menuStrip1.TabIndex = 1;
this.menuStrip1.Text = "menuStrip1";
//
// openToolStripMenuItem
//
this.openToolStripMenuItem.DropDownItems.AddRange(new System.Windows.Forms.ToolStripItem[] {
this.openToolStripMenuItem1});
this.openToolStripMenuItem.Name = "openToolStripMenuItem";
this.openToolStripMenuItem.Size = new System.Drawing.Size(37, 20);
this.openToolStripMenuItem.Text = "File";
//
// openToolStripMenuItem1
//
this.openToolStripMenuItem1.Name = "openToolStripMenuItem1";
this.openToolStripMenuItem1.Size = new System.Drawing.Size(152, 22);
this.openToolStripMenuItem1.Text = "Open";
this.openToolStripMenuItem1.Click += new System.EventHandler(this.openToolStripMenuItem1_Click);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(820, 345);
this.Controls.Add(this.textBox1);
this.Controls.Add(this.menuStrip1);
this.MainMenuStrip = this.menuStrip1;
this.Name = "Form1";
this.Text = "Form1";
this.menuStrip1.ResumeLayout(false);
this.menuStrip1.PerformLayout();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.TextBox textBox1;
private System.Windows.Forms.MenuStrip menuStrip1;
private System.Windows.Forms.ToolStripMenuItem openToolStripMenuItem;
private System.Windows.Forms.ToolStripMenuItem openToolStripMenuItem1;
}

Update excel spreadsheet from another thread

I've created COM server using C# where my clients can receive real time updates.
Updates usually fired from different threads.
But I've noted that Excel crashes when callback methods updates spreadsheet.
Is there any way to call updates in UI thread?
P.S. I know about RTD feature of Excel. But it doesn't suit my needs because i need several parameters in one update.

what you are looking for is the Invoke / BeginInvoke Method of ISyncronizedInvoke
on your UI thread, take an arbitrary control and keep that reference ...
from the thread that wants to fire an update, call Invoke or BeginInvoke on that control (Control implements ISyncronizedInvoke) with a delegate that you want to execute on the UI thread ... from that delegate you may call your COM server
//EDIT: example code
using System;
using System.Windows.Forms;
using System.Threading;
using Microsoft.Office.Interop.Excel;
using System.Runtime.InteropServices;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
Thread someWorkerThread;
Microsoft.Office.Interop.Excel.Application ExApp;
Worksheet wrkSheet;
public Form1()
{
InitializeComponent();
ExApp = new Microsoft.Office.Interop.Excel.Application();
ExApp.Visible = true; // or else we won't see the window
var books = ExApp.Workbooks;
var wrkBook = books.Add();
var sheets = wrkBook.Worksheets;
wrkSheet = sheets.get_Item(1);
Marshal.ReleaseComObject(sheets);
Marshal.ReleaseComObject(wrkBook);
Marshal.ReleaseComObject(books);
someWorkerThread = new Thread(new ParameterizedThreadStart(threadHandler));
someWorkerThread.Start(this);
}
private void threadHandler(object obj)
{// this will be executed on a seperate worker thread
Control mainFrm = obj as Control;
if (mainFrm == null)
throw new ArgumentException("Need to have a Control as parameter");
for (int i = 1; i < 50;i++ )
{
Thread.Sleep(2500);
mainFrm.Invoke(new Action<int>(doStuff), i); // this will invoke the main UI thread
}
}
private void doStuff(int i)
{// this will be executed on the main UI thread
var range = wrkSheet.Range[string.Format("A{0}", i)];
range.Value = "Hello World!";
Marshal.ReleaseComObject(range);
}
#region designer stuff
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(76, 84);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(149, 13);
this.label1.TabIndex = 0;
this.label1.Text = "I am an ordinary windows form";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(284, 262);
this.Controls.Add(this.label1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.Label label1;
#endregion
}
}
be advised: this example does not clean up the wrkSheet reference and the ExApp reference ... you have to release them before you exit your application

Develop Reference

C# (C-Sharp) is a programming language developed by Microsoft that runs on the .NET Framework.

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Update excel spreadsheet from another thread

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