Check textbox numeric

Question

how to check textbox values String or Numeric asp.net c#?

Priyaranjan K S · Answer

Hi You can check this in server side as : If you are looking for an integer value you could use int.TryParse : int result; if (int.TryParse(123 out result)) { Debug.WriteLine(Valid integer:  + result); } else { Debug.WriteLine(Not a valid integer); } For checking a decimal number replace int.TryParse with Decimal.TryParse You can also use Regular expression Validation as below : top: 283px ValidationGroup=check> ErrorMessage=Please Enter Only Numbers Style=z-index: 101; left: 424px; position: absolute; top: 285px ValidationExpression=^\d+$ ValidationGroup=check> Thanks Priyan If you found this useful Please Accept this as Answer .

Senzeye · Answer

http://dotnetdrizzles.blogspot.in/2015/10/check-textbox-value-isnumeric-or-string.html

Ravi Patel · Answer

Hi You can try this also private void Button1_Click(object sender EventArgs e) { try { int.Parse(TXT_Number.Text); } catch { LabelError.Text = You have not entered a number; } }

Ravi Kumar · Answer

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