allow numbers to textbox

Question

How to allow users to enter only numbers to a text box am working with windows application and there is no validator controls

venkata kumar · Answer

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; } }

Shankar M · Answer

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 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.

Satyapriya Nayak · Answer

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace Number_Character_validate_Csharp { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void textBox1_KeyPress(object sender KeyPressEventArgs e) { // Number Validation(only Number allowed) if (!System.Text.RegularExpressions.Regex.IsMatch(e.KeyChar.ToString() \d+)) e.Handled = true; } } }

Praveen Moosad · Answer

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