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 Kumar · 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

allow numbers to textbox

Answers (4)