I'm trying to make a multiWindowsForm.
Just to try how it is working I started with a a simple form that I added a button to. When clicking on it, another window should pop up. But I can't get it to work. It crashes with error:
Object reference not set to an instance of an object!
I used Project → Add → Windows form and named it Mupp.cs
Here's my code for 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 MultiForm
{
public partial class tryout : Form
{
public tryout()
{
InitializeComponent();
}
Mupp theMupp;
private void Form1_Load(object sender, EventArgs e)
{
theMupp = new Mupp();
}
private void button1_Click(object sender, EventArgs e)
{
theMupp.Show();
}
}
}
What can I have missed out on?
It looks like the load event is not firing and thus not initilising your object. Make sure that the load event is hooked up.
Alternatively, initialise in the click event.
private void button1_Click(object sender, EventArgs e)
{
using (Mupp theMupp = new Mupp())
{
theMupp.ShowDialog();
}
}
I hope this helps.
public tryout()
{
InitializeComponent();
this.Load += new EventHandler(Form1_Load);
}
Related
This is my first assignment using C# and I've learned briefly about programming with Python in my pre-u. The C# form that I would like to show the user upon logging in can't be shown and instead, the program displays the Built errors msg, where I click on 'Yes' to continue running the last successful build. However, it will show one of the previous forms (which I have deleted from the program) instead - making it hard for me to test run and check for any other errors in my program.
The form I would like to show is TechnicianHome.
Error
There were built errors. Would you like to continue and run the last successful build?
Any help is much appreciated.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace ASSIGNMENT
{
public partial class TechnicianHome : Form
{
public static string name;
public TechnicianHome()
{
InitializeComponent();
}
public TechnicianHome (string n)
{
InitializeComponent();
name = n;
}
private void TechnicianHome_Load(object sender, EventArgs e)
{
lblWelcome.Text = "Welcome" + name;
}
private void button1_Click(object sender, EventArgs e)
{
ServiceRequests vr = new ServiceRequests();
this.Hide();
vr.ShowDialog();
}
private void button1_Click_1(object sender, EventArgs e)
{
UpdateProfile up = new UpdateProfile();
this.Hide();
up.ShowDialog();
}
}
}
i am new to .net i am having trouble playing videos automatically. I would be showing different textboxes here but i want the video to autplay without any buttons
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using WMPLib;
namespace ThinkQDisplay
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void axWindowsMediaPlayer1_Enter(object sender, EventArgs e)
{
AxWindowsMediaPlayer1.URL = "C:\Users\Ramrod\Documents\Visual Studio 2012\Projects\ThinkQDisplay\ThinkQDisplay\sample.avi";
}
}
}
It keeps telling it is an unrecognized escape sequence. Also I would like to have a separate form (form2). Where I can choose what to play here on form 1. Is it also possible to have it looped?
private void axWindowsMediaPlayer1_Enter(object sender, EventArgs e)
{
axWindowsMediaPlayer1.URL = #"C:\Users\Ramrod\Documents\Visual Studio 2012\Projects\ThinkQDisplay\ThinkQDisplay\sampler.avi";
}
private void Form1_Load(object sender, EventArgs e)
{
axWindowsMediaPlayer1.settings.autoStart = true;
}
}
}
Basically trying to learn a few things I havn't tried yet. I want to make a small program that has a Textbox and Button.
Whats typed into the textbox field will be added to the end of a url applied from the button.
http://website.com/stuff?things= +textboxValue
After you click the launch button, I want the url created with the entered text, to open in a second form.
I have everything working except for the text from form1 to carry over to form2. Just wondering how I can go about this.
Form 1
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication8
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
Form2 form2 = new Form2();
form2.LinkTarget = textBox1.Text;
form2.Show();
}
private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
{
Form3 newFrm = new Form3();
newFrm.Show();
}
private void Form1_Load_1(object sender, EventArgs e)
{
}
}
}
Form2
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication8
{
public partial class Form2 : Form
{
public Form2()
{
InitializeComponent();
}
public string LinkTarget {
get;
set;
}
private void webBrowser1_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
string myUrl = "http://website.com/stuff?things=" + LinkTarget;
}
}
}
Example of what I am going for.
Form one has text box and button.
when you click the button it will open http://www.stackoverflow.com/questions/ in the second form. the second form is basically a browser.
but, in form one if I type 41090977 before I hit the button, it will open http://www.stackoverflow.com/questions/41090977
You can create a property in form2, which you set before you open it:
//... other form2 code
public string LinkTarget {
get;
set;
}
You can set the value like this (in button1_Click):
Form2 form2 = new Form2();
form2.LinkTarget = myTextBox.Text;
form2.Show();
Within form2 you can use the value of the property to create your link. In your current code you have just defined the property. You have to use its content to create your link. This is done by attaching the property value to your string containing the URL with the + operator:
string myUrl = "http://website.com/stuff?things=" + LinkTarget;
I am in need of a bit of help searched around the internet for about 2 days
to try and figure out how i can call an AxShockwaveFlash Variable from a second form this is for a game trainer something simple just getting into C# so i thought id start with one of these however i love everything i make to have a nice look and as many options as i can add so for my first C# Trainer i added a MenuStrip that opens a second form(VariableMods.cs) it has a few radio buttons a text box 3 toggle switches and 2 buttons one for setting a variable to whatever is typed in the text box while checking which radio button is checked and a button to close the variable menu which is another thing i need a bit of help with
-How do i Close the Second Form but still keep my Toggles On?
-How do i Call A Variable From (Form1.cs) to Form2(VariableMods.cs)
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace OCULAS
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//Show the Variable ModMenu
private void openVariableModsToolStripMenuItem_Click(object sender, EventArgs e)
{
VariableMods VarMenu = new VariableMods(this);
VarMenu.Show();
}
//Show About Program Box
private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
{
InfoBox1 AboutBoxx = new InfoBox1();
AboutBoxx.Show();
}
//Close the Program
private void closeToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Close();
}
}
}
That is my Form1 Code Have Not Put anything into it about the ShockwaveFlash yet
And
here is Form2(VariableMods)
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace OCULAS
{
public partial class VariableMods : Form
{
Form1 originalForm; //Using "OriginalForm" To Call "Form1"
public VariableMods(Form1 IncomingForm)
{
originalForm = IncomingForm; //originalForm(Form1) is the form to be called
InitializeComponent();
BoxHeadVariables utf = new BoxHeadVariables();
}
private void ambiance_Button_21_Click(object sender, EventArgs e)
{
this.Hide();
}
private void ambiance_Button_11_Click(Form1 incomingForm, object sender, EventArgs e)
{
if (ambiance_RadioButton1.Checked == true)
{
MessageBox.Show("Damage Mod Is Active");
}
if (ambiance_RadioButton2.Checked == true)
{
MessageBox.Show("Speed Mod Is Active");
}
if (ambiance_RadioButton3.Checked == true)
{
MessageBox.Show("Range Mod Is Active");
}
}
}
}
I am trying to make a multiform application that takes a DataGridView of table attributes and shows them in a DetailView upon the click of a button. When I click the button and the second form opens it is empty. Then if I close the second form I get 'An unhandled exception of type 'System.NullReferenceException' occurred'. Here is my code:
Form 1
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace MultiForm
{
public partial class Form1 : Form2
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
// TODO: This line of code loads data into the 'personnelDataSet.employee' table. You can move, or remove it, as needed.
this.employeeTableAdapter.Fill(this.personnelDataSet.employee);
}
private void btnExit_Click(object sender, EventArgs e)
{
this.Close();
}
private void btnDetails_Click(object sender, EventArgs e)
{
Form2 dForm = new Form2();
dForm.ShowDialog();
this.tableAdapterManager.UpdateAll(this.personnelDataSet);
}
}
}
Form 2
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace MultiForm
{
public partial class Form2 : Form
{
//public Form2()
//{
// InitializeComponent();
//}
private void employeeBindingNavigatorSaveItem_Click(object sender, EventArgs e)
{
this.Validate();
this.employeeBindingSource.EndEdit();
this.tableAdapterManager.UpdateAll(this.personnelDataSet);
}
private void Form2_Load(object sender, EventArgs e)
{
// TODO: This line of code loads data into the 'personnelDataSet.employee' table. You can move, or remove it, as needed.
this.employeeTableAdapter.Fill(this.personnelDataSet.employee);
}
}
}
I get the exception on form 1 at this.tableAdapterManager.UpdateAll(this.personnelDataSet); Any help would be greatly appreciated.
Didn't drag in the data components into the tray duh... Sorry guys.