Elysian Shadows

Keevu wrote:

Code: Select all

if(IsNumeric(textBox1.Text) == true)
  {
     // your convert code goes here
  }
  else
  {
     // your error message goes here
  }

put something like "please input number" where the your error message goes where comment is at.

snippet made by the great edward. I take no credit.

int number = 0;

if (int.TryParse(textBox1.Text, out number))
{
    //do something with number
}
else
{
    //scream at the user, cuz that's not a number!
}

trufun202 wrote:

Keevu wrote:

Code: Select all

if(IsNumeric(textBox1.Text) == true)
  {
     // your convert code goes here
  }
  else
  {
     // your error message goes here
  }

put something like "please input number" where the your error message goes where comment is at.

snippet made by the great edward. I take no credit.

actually..that's not correct. .NET doesn't have an IsNumeric() method built into the framework. That's an old VB method that didn't make it in the jump to .NET.

I would recommend the following:

Code: Select all

int number = 0;

if (int.TryParse(textBox1.Text, out number))
{
    //do something with number
}
else
{
    //scream at the user, cuz that's not a number!
}

EDIT: Or, a more user friendly option may be to use an asp:RegularExpressionValidator to validate the number on the client side.