Check textbox numeric

g s

11y1.2k.NET

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

4 Replies

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Priyaranjan K S11y ago
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

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Senzeye11y ago
http://dotnetdrizzles.blogspot.in/2015/10/check-textbox-value-isnumeric-or-string.html
Ravi Patel11y ago
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";
}
}

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