Code Snippet:
//Block 1:
string strValidationFailureMessage =””;
if
(!IsNumeric(txtZipCode.Text.Trim()))
{
strValidationFailureMessage
= "Invalid Zip/Postal Code";
}
//Block 2:
private
bool IsNumeric(string
strData)
{
int i = 0;
bool blnIsNumber = true;
strData = strData.Trim();
//validation for Numeric Value
for (i = 0; i < strData.Length; i++)
{
blnIsNumber = char.IsDigit(strData[i]);
if (blnIsNumber == false)
{
break;
}
}
return blnIsNumber;
}
Note:
txtZipcode is the id of my textbox.
You
can use Block1 in the beginning of your submit button and if string ‘strValidationFailureMessage’
is not empty then don’t proceed with saving or whatever you want to do inside
buttonclick event. Display the message to user.