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" />

Check textbox numeric

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Answers (4)