Number TextBox

Hi All,
   Today ,we see how to Create Number TextBox?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Text.RegularExpressions;
namespace LaksUserControl.UtilityLayer
 {
 class NumberTextBox : TextBox
 {
 CustomErrorProvider objCEP = new CustomErrorProvider();
 public enum CheckStatus { True, False, };
 public enum CheckStatusBlank { True, False, };
 enum ValidatieonType { BLANK, CHARACTER, BLANKWITHCHARACTER, };
 private CheckStatus m_CheckStatus;
 private CheckStatusBlank m_CheckStatusBlank;
 public CheckStatus CheckErrorProvider
 {
 get
 {
 return m_CheckStatus;
 }
 set
 {
 m_CheckStatus = value;
 }
 }
 public CheckStatusBlank CheckEmptyBox
 {
 get
 {
 return m_CheckStatusBlank;
 }
 set
 {
 m_CheckStatusBlank = value;
 }
 }
 private bool CheckBlankTextBox()
 {
 if (string.IsNullOrEmpty(this.Text))
 return true;
 else
 return false;
 }
 private bool ValidateNumber(string str)
 {
 Regex regexAlphaNum = new Regex(@"^[0-9]*$");
 return regexAlphaNum.IsMatch(str);
 }
 bool checkBlank;
 private bool CheckBlankTextBox(ValidatieonType Mode)
 {
 switch (Mode)
 {
 case ValidatieonType.BLANK:
 if (string.IsNullOrEmpty(this.Text))
 checkBlank = true;
 else
 checkBlank = false;
 break;
 case ValidatieonType.CHARACTER:
 if (!ValidateNumber(this.Text))
 checkBlank = true;
 else
 checkBlank = false;
 break;
 case ValidatieonType.BLANKWITHCHARACTER:
 if (string.IsNullOrEmpty(this.Text) | !ValidateNumber(this.Text))
 checkBlank = true;
 else checkBlank = false;
 break;
 }
 return checkBlank;
 }
 bool chkdisplayEP;
 protected internal bool DisplayErrorProvider(string CheckErrorProvider, string CheckEmptyBox, string Message)
 {
 if (CheckErrorProvider == "true" && CheckEmptyBox == "true")
 {
 if (CheckBlankTextBox(ValidatieonType.BLANKWITHCHARACTER))
 {
 objCEP.SetError(this, Message);
 chkdisplayEP = true;
 }
 else
 {
 objCEP.SetError(this, "");
 chkdisplayEP = false;
 }
 }
 else if ((CheckErrorProvider == "true" && CheckEmptyBox == "false"))
 {
 if (CheckBlankTextBox(ValidatieonType.CHARACTER))
 {
 objCEP.SetError(this, Message);
 chkdisplayEP = true;
 }
 else
 {
 objCEP.SetError(this, "");
 chkdisplayEP = false;
 }
 }
 return chkdisplayEP;
 }
 }
 }


 using System;
using System.Collections.Generic;
using System.Linq;
 using System.Text;
using System.Windows.Forms;
 namespace LaksUserControl.UtilityLayer
{

 class CustomErrorProvider : ErrorProvider
 {
 public List GetControls()
 {
 return this.GetControls(this.ContainerControl);
 }
 public List GetControls(Control ParentControl)
 { 
 List ret = new List(); 
 if (!string.IsNullOrEmpty(this.GetError(ParentControl)))
 ret.Add(ParentControl); 
 foreach (Control c in ParentControl.Controls)
 {
 List child = GetControls(c);
 if (child.Count > 0)
 ret.AddRange(child);
 }
 return ret;
 }
 }
 }
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