string.toUpper() 1

[Eli20]

hi, i have a windows.net application in c#, im trying to make it so when they user starts typing in a textbox the letter automaticly gets in upper case.

this was very easy to do in vb6.0, but i cannt find a way to do it, can anybody help me??

i created an event, and binded it to the keypress event of my textbox. but im lost now.

thank you very much!!

Eli

 

[AmazingGrace]

Hi,

You can extend the System.Windows.Forms.TextBox class that will give you a reusable control that always displays text in upper-case. Below is a sample of a user-control that overrides TextBox.

sing System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace UCaseTextBoxControl
{
   /// <summary> 
   /// A text box that only accepts upper-case text
   /// </summary>
	public class UCaseTextBox : System.Windows.Forms.TextBox
	{

		private System.ComponentModel.Container components = null;
      // member declarations
      [DllImport("user32")]
      public static extern int GetKeyboardState(ref byte KeyState);
      [DllImport("user32")]
      public static extern int SetKeyboardState(ref byte KeyState);
      private const int WM_KEYDOWN = 0x100;

      protected override bool ProcessCmdKey(ref Message msg, Keys keyData)
      {
         try
         {
            Keys keyCode = (Keys)(msg.WParam.ToInt32() 
               & System.Convert.ToInt32(Keys.KeyCode));
            if (msg.Msg == WM_KEYDOWN)
            {
               // If the user is already shifting, 
               // no need to upper-case it... Also,
               // don't handle non alpha characters
               if (Control.ModifierKeys != Keys.Shift && 
                  ((int)keyCode >= 65 && (int)keyCode <= 90) 
                  || ((int)keyCode >= 97 && (int)keyCode <= 122))
               {
                  byte[] keyStates = new byte[255];
                  // Load the keyboard
                  GetKeyboardState(ref keyStates[0]);	      
                  // Turn off the lowercase key
                  keyStates[(int)keyCode] = 0;					
                  // Reset keyboard
                  SetKeyboardState(ref keyStates[0]);       
                  // Send new keystroke of of uppercase character
                  SendKeys.Send(keyCode.ToString().ToUpper());
                  return true;
               }
            }
         }
         catch (Exception ex)
         {
            System.Diagnostics.Debug.WriteLine(string.Format("Error in ProcessCmdKey(override) {0}", ex.ToString()));
         }
         finally 
         {

         }
         return base.ProcessCmdKey (ref msg, keyData);
      }

Certainly not as easy as VB6's way where you just handle the KeyPress event and make the KeyAscii variable the uppercase equivelent. But this way is more extensible

By the way, this is just a snippet of the UCaseTextBox class. To make your own, create a new Windows Control Library project, and rename the default class to UCaseTextBox or whatever you like. Then, in the class declaration, change the control to inherit from TextBox instead of UserControl. Finally, just add the ProcessCmdKey override code in the example and compile. Hope this helps you.

 

[JohnYingling]

The TextBox has a CharacterCasing property.

// set input to uppercase
textBox1.CharacterCasing = CharacterCasing.Upper;

http://www.VBResizer.com

Forms/Controls Resizing/Tabbing

http://www.VBCompare.com

Compare Code

http://www.VBSortGen.com

Generate Sort Class in VB

http://www.Vbcompare.com/Check.Htm(1979

Check To MS)

 

[JohnYingling]

To add events to controls in C#. The propert window for a control has a "lightning bolt". Click it. You can double-click an entry or type in your own name. You can come back and change or remove the name.

http://www.VBResizer.com

Forms/Controls Resizing/Tabbing

http://www.VBCompare.com

Compare Code

http://www.VBSortGen.com

Generate Sort Class in VB

http://www.Vbcompare.com/Check.Htm(1979

Check To MS)

 

[Eli20]

thank you JohnYingling thats exactly what i needed.. ;-)

Eli

 

[davidhexter]

How do you add the "Code" Blocks to your posts?

David Hexter
Business/Applications Analyst, DBA

 

[AmazingGrace]

You use a TGML markup tag: [ignore]

[/ignore].

Example:
[ignore]
[CODE]
Class HelloWorld()
{
   System.Windows.Forms.MessageBox.Show("Hello World!");
}

[/ignore]

appears as:

Class HelloWorld()
{
   System.Windows.Forms.MessageBox.Show("Hello World!");
}

More information on TGML tags can be found here