www.pudn.com > WMACompressor.zip > NumericTextBox.cs

// 
// 
//  THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY 
//  KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
//  IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR 
//  PURPOSE. IT CAN BE DISTRIBUTED FREE OF CHARGE AS LONG AS THIS HEADER  
//  REMAINS UNCHANGED. 
// 
//  Email:  yetiicb@hotmail.com 
// 
//  Copyright (C) 2002-2003 Idael Cardoso.  
// 
 
using System; 
using System.Windows.Forms; 
using System.Globalization; 
 
namespace Yeti.Controls 
{ 
	/// 
 
	/// Define a TextBox that allow only integer numbers. 
	/// 
 
	public class NumericTextBox : TextBox 
	{ 
		public NumericTextBox() 
      :base() 
		{ 
		} 
 
    protected override void OnKeyPress(KeyPressEventArgs e) 
    { 
      base.OnKeyPress(e); 
      if ( (!e.Handled) && ( "1234567890\b".IndexOf(e.KeyChar) < 0) ) 
      { 
        Yeti.Sys.Win32.MessageBeep(Yeti.Sys.BeepType.SimpleBeep); 
        e.Handled = true; 
      } 
    } 
 
	  public event EventHandler FormatError; 
    public event EventHandler FormatValid; 
 
    protected virtual void OnFormatError(EventArgs e) 
    { 
      if (FormatError != null) 
      { 
        FormatError(this, e); 
      } 
    } 
 
    protected virtual void OnFormatValid(EventArgs e) 
    { 
      if (FormatValid != null) 
      { 
        FormatValid(this, e); 
      } 
    } 
 
    protected override void OnTextChanged(EventArgs e) 
    { 
      try 
      { 
        int.Parse(this.Text, NumberStyles.Integer); 
        OnFormatValid(e); 
      } 
      catch 
      { 
        OnFormatError(e); 
      } 
      base.OnTextChanged (e); 
    } 
 
    public int Value 
    { 
      get 
      { 
        return int.Parse(this.Text, NumberStyles.Integer); 
      } 
      set 
      { 
        this.Text = value.ToString(); 
      } 
    } 
  } 
}