TextBox的输入控制,该怎么处理

TextBox的输入控制
如何控制TextBox只能输入数字而不能输入其它字符？？求教求教！！

[解决办法]

C# code

 Regex re = new Regex(@"^\d+$", RegexOptions.None);            if (!re.IsMatch(TextBox的ID.Text.Trim()))            {                 //提示，只能输入数字            }
[解决办法]
HTML code
<asp:textbox class="Text"        onkeypress="if (event.keyCode < 48 || event.keyCode >57) event.returnValue = false;"id="txtY_Revenue" runat="server" >    </asp:textbox>
[解决办法]
WinFom:

  private void txtMaterialQty_KeyPress(object sender, KeyPressEventArgs e)
       {
           if (e.KeyChar != '\b')//这是允许输入退格键
           {
               if ((e.KeyChar < '0') || (e.KeyChar > '9'))//这是允许输入0-9数字
               {
                   e.Handled = true;
               }
           }
       }

WebForm:

  <asp:TextBox ID="txtPcbQty" runat="server" Width="159px" AutoCompleteType="Disabled" onkeyup="if(isNaN(value))execCommand('undo')" onafterpaste="if(isNaN(value))execCommand('undo')"></asp:TextBox>
[解决办法]
C# code
private void txtBox_KeyPress(object sender, KeyPressEventArgs e)        {            if (e.KeyChar == (char)8)            {                return;            }            if (e.KeyChar > (char)47 && e.KeyChar < (char)58)            {                e.Handled = false;            }            else            {                e.Handled = true;            }        }