Develop Reference

Displaying a text box

I've searched the questions for an answer but couldn't quite find a clear cut example. I am trying to display a simple text box in C#. I am working with C#, ArcMap and ArcObjects. I have created a toolbar that has a button in it. Upon clicking the button, I just need a text box to appear on the page. So far, this is what I've got, but nothing is producing when I click my button. Thanks for your help in advance.
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Windows.Forms;
namespace Map
{
public class ArcGISAddin4 : ESRI.ArcGIS.Desktop.AddIns.Button
{
public ArcGISAddin4()
{
}
protected override void OnClick()
{
TextBox dynamicTextBox = new TextBox();
dynamicTextBox.Text = "My First Text Box";
dynamicTextBox.Name = "First Text Box";
dynamicTextBox.Enabled = true;
}
protected override void OnUpdate()
{
}
}
}

You must add the TextBox to the surrounding container (the form for example). Otherwise the program won't know where it's supposed to be displayed.

You should add dynamicTextBox to a specific container such as form.
Such as this:
TextBox dynamicTextBox = new TextBox();
dynamicTextBox.Text = "My First Text Box";
dynamicTextBox.Name = "First Text Box";
dynamicTextBox.Enabled = true;
this.Contols.Add(dynamicTextBox);//this is a pseudo code

C#, VS2010 - Changing font and other properties?

Creating a text editor just to try and hone my programming skills some more. I have the winform opening new text files, saving them and the usual undo, redo, copy, paste etc etc. However. I'm now trying to change the font.
When you click the "change font" button in the menu strip, a new form appears and loads all available fonts you can use into a list box.
List<string> fonts = new List<string>();
foreach (FontFamily font in System.Drawing.FontFamily.Families)
{
fonts.Add(font.Name);
}
listboxfont.DataSource = fonts;
Now before I edit the text on the other page, I wanted to edit a sample label to test everything is okay!
After some research, I come across many bits of code like this..
lblsample.Font = new Font(listboxfont.SelectedItem, 12);
I might be wrong, but I see no reason why I can't use the selected item from the list box, which IS the fonts and use that to edit the label however it is giving me the error..
"Text_editor.font does not contain a constructor that takes 2
arguments.
Have tried and tried but no luck. Can anybody help?

It is because listboxfont.SelectedItem is an object. You need to cast it to a string so:
lblsample.Font = new Font((string)listboxfont.SelectedItem, 12);
or if you prefer:
lblsample.Font = new Font(listboxfont.SelectedItem.ToString(), 12);
That should do the trick!
UPDATE - Full example
Add listbox named listboxfont
Add label named lblsample
Add button named btnPreview
private void Form1_Load(object sender, EventArgs e)
{
List<string> fonts = new List<string>();
foreach (FontFamily font in System.Drawing.FontFamily.Families)
{
fonts.Add(font.Name);
}
listboxfont.DataSource = fonts;
}
private void btnPreview_Click(object sender, EventArgs e)
{
lblsample.Font = new Font(listboxfont.SelectedItem.ToString(), 12);
}

You have declared a variable named font in your Text_editor form. (note the casing.. all lowercase!)
OR
The message you typed in your question has a typo. Is it Text_editor.fonts does not contain a constructor that takes 2 arguments.? If yes, then you have used your fonts variable wrongly, which is not of Font type, but instead is of List<string> type.
Name your variables properly, and it should start working.

Try this:
lblsample.Font = new Font(listboxfont.SelectedItem.ToString(), 12.0f);
The Font constructor requests a String and a float
public Font(
string familyName,
float emSize
)

Make links readonly in richtextbox c#

I have a richtextbox in c# and I want to make the links that appear as readonly. Right now I can move my cursor into it and edit it. Is there any way to make it readonly?

You can set this property of a RichTextBox to make the whole text read-only
ReadOnly = true
If you would like to protect the links only but leave other text editable, please try to insert the following whether under Form1_Load or under any method you may create
You'll need to add RichTextBox.Find(string str); from the object browser
MatchCollection mc = Regex.Matches(richTextBox1.Text, #"(www[^ \s]+|http[^ \s]+)([\s]|$)", RegexOptions.IgnoreCase); // Create a new MatchCollection and match from richTextBox1.Text
for (int collection = 0; collection < mc.Count; collection++) // increase collection for every string in mc
{
if (richTextBox1.Find(mc[collection].Value, RichTextBoxFinds.None) > -1) // Find the mc value
{
richTextBox1.SelectionProtected = true; // Protect the value
}
}
So the form would look like this
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Text.RegularExpressions;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
MatchCollection mc = Regex.Matches(richTextBox1.Text, #"(www[^ \s]+|http[^ \s]+)([\s]|$)", RegexOptions.IgnoreCase);
for (int collection = 0; collection < mc.Count; collection++)
{
if (richTextBox1.Find(mc[collection].Value, RichTextBoxFinds.None) > -1)
{
richTextBox1.SelectionProtected = true;
}
}
}
}
}
Thanks,
Have a great day :)

You can change it in your code like this:
richTextBox1.ReadOnly = true;
Or you could go to your design view, check the properties for your richtextbox and set the ReadOnly attribute to true.

You should capture the change event, in such a way that you reset every change a user would like to make to the link and set it back to the original link. Save the positions of the links and update the positions if the user deletes or adds a character.

I would like to share my solution...I did try everything I found on the internet but seems I can't get exactly 100% like I want(to make a richtexbox as readonly). Then I start looking for an alternative which finally I get one to do exactly like I want.
Sometime we need to show the value with a style on it, thats why we choose richtextbox at the 1st time, then it become an issue when we unable to make it as ReadOnly. The different is I am not using the richtextbox anymore but I change it to label. Depending on how your program work, you might need to have 2 control (richtextbox & label) to hold the same value which will be switched(visible true/false) base on your requirement.
See my example here to get a ReadOnly richtextbox look alike control :
<div id="History">
<asp:Label ID="lblLACA27" runat="server" CssClass="ctlLabel"></asp:Label>
</div>
And a piece of CSS code :
#History
{
height: 100px;
float: left;
overflow: auto;
overflow-x: hidden;
}
The DIV tag which hold the LABEL will act like multiline textbox/richtextbox with scrollbar visible on it. Thats it & lets continue programming. Hope this will help someone later.

Label word wrapping [duplicate]

This question already has answers here:
Word wrap for a label in Windows Forms
(20 answers)
Closed 9 years ago.
Is there a way to do a word wrap in a .NET label control?
I know there is an alternate way of using a TextBox, make property BorderStyle to none, property ReadOnly to true and set property WordWrap and property Multiline to true.
Is there something for a label?

Change your maximum size,
label1.MaximumSize = new Size(100, 0);
And set your autosize to true.
label1.AutoSize = true;
That's it!

Just set Label AutoSize property to False. Then the text will be wrapped and you can re-size the control manually to show the text.

Refer to Automatically Wrap Text in Label. It describes how to create your own growing label.
Here is the full source taken from the above reference:
using System;
using System.Text;
using System.Drawing;
using System.Windows.Forms;
public class GrowLabel : Label {
private bool mGrowing;
public GrowLabel() {
this.AutoSize = false;
}
private void resizeLabel() {
if (mGrowing) return;
try {
mGrowing = true;
Size sz = new Size(this.Width, Int32.MaxValue);
sz = TextRenderer.MeasureText(this.Text, this.Font, sz, TextFormatFlags.WordBreak);
this.Height = sz.Height;
}
finally {
mGrowing = false;
}
}
protected override void OnTextChanged(EventArgs e) {
base.OnTextChanged(e);
resizeLabel();
}
protected override void OnFontChanged(EventArgs e) {
base.OnFontChanged(e);
resizeLabel();
}
protected override void OnSizeChanged(EventArgs e) {
base.OnSizeChanged(e);
resizeLabel();
}
}

Ironically, turning off AutoSize by setting it to false allowed me to get the label control dimensions to size it both vertically and horizontally which effectively allows word-wrapping to occur.

If you open the dropdown for the Text property in Visual Studio, you can use the enter key to split lines. This will obviously only work for static text unless you know the maximum dimensions of dynamic text.

If you want some dynamic sizing in conjunction with a word-wrapping label you can do the following:
Put the label inside a panel
Handle the ClientSizeChanged event for the panel, making the
label fill the space:
private void Panel2_ClientSizeChanged(object sender, EventArgs e)
{
label1.MaximumSize = new Size((sender as Control).ClientSize.Width - label1.Left, 10000);
}
Set Auto-Size for the label to true
Set Dock for the label to Fill

You can use a TextBox and set multiline to true and canEdit to false .

WP7 silverlight custom control using popup

I'm creating a custom datepicker, I have a textbox, once clicked it opens a calendar within a popup.
What I want to do is change the size of the popup so it shows my whole calendar, but I can't manage to change it..., I've tried using Height, Width, MinHeight, MinWidth... but it doesn't work, the popup keep showing with a fixed size.
The thing is that my popup's parent property isn't evaluated since it has expression issues (according to debugger), so I'm sure my popup's parent isn't the main screen( say layout grid).
How can I for example make my popup open within a specific context ?
This part of my code isn't XAML, it's C# code only and it looks like:
using System;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Ink;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using System.Windows.Controls.Primitives;
namespace CalendarBranch.components
{
public class wpDatePicker:TextBox
{
private CalendarPopup calendar;
private Popup popup;
public wpDatePicker()
{
this.calendar = new CalendarPopup();
this.popup = new Popup();
this.popup.Child = this.calendar;
this.popup.Margin = new Thickness(0);
this.MouseLeftButtonUp += new MouseButtonEventHandler(wpDatePicker_MouseLeftButtonUp);
this.calendar.onDateSelect += new EventHandler(onDateSelected);
this.IsReadOnly = true;
}
protected void wpDatePicker_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
this.popup.Height = this.calendar.Height;
this.popup.Width = this.calendar.Width;
this.popup.HorizontalAlignment = HorizontalAlignment.Center;
this.popup.VerticalAlignment = VerticalAlignment.Center;
this.popup.HorizontalOffset = 0;
this.popup.VerticalOffset = 0;
this.popup.MinHeight = this.calendar.Height;
this.popup.MinWidth = this.calendar.Width;
this.popup.IsOpen = true;
}
private void onDateSelected(Object sender, EventArgs ea) {
this.Text = this.calendar.SelectedValue.ToShortDateString();
this.popup.IsOpen = false;
}
}
}
PS: the class Calendar is simply a UserControl that contains a grid with multiple columns, HyperLinkButtons and TextBlocks, so nothing special.
Thank you in advance guys ;)
Cheers
Miloud B.

Popup control resizes itself to fit the content inside of it. For example, if you set the child of Popup to be StackPanel with width/height set to 100, the popup will be 100x100.
So it's really important to set the sizes not of your popup, but of your inner panel. Try wrapping your content into the stackpanel and assign necessary width/height there.