allow numbers to textbox

Hi User,

You can also control entering the numeric values in the text box using the below key press event for code:

Text Box Key Press Event :

if ((e.KeyChar < 48 || e.KeyChar > 57) && e.KeyChar != 8)
            {
                e.Handled = true;
            }

To allow back space we have excluded the character code 8 BackSpace key. The numeric values for Key code lies between 48 and 57 so by this we exclude the characters when type using e.Handled = true.

hi anil,
u can add fallowing code in which ever control u want to allow number for that textbox keypress event u can implement it.

 private void textbox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            try
            {
                if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar))
                {
                    e.Handled = true;
                    MessageBox.Show("Enter Numbers Only", "Error", MessageBoxButtons.OK,                         MessageBoxIcon.Exclamation, MessageBoxDefaultButton.Button1);
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

Hi Anil,

we have so many way's to achieve it: Example 

 <asp:TextBox ID="TextBox1" runat="server">asp:TextBox>

id="RegularExpressionValidator1"
                   ControlToValidate="TextBox1"
                   ValidationExpression="\d+"
                   Display="Static"
                   EnableClientScript="true"
                   ErrorMessage="Please enter numbers only"
                   runat="server"/>

Thanks