C# Help Personel DB Project

[Fort]

Was working on a project and we stumble with this error. Thanks in advance appreciate all the help

 

[Tommy]

Since SelectedValue doesn't really represent a string, you could try:

Int32.Parse(DropDownList1.SelectedValue.ToString());

Or, instead of using "int.Parse" you could use "int.TryParse":

int resultValue = 0;

if ((int.TryParse(DropDownList1.SelectedValue, out result) && (resultValue > 0))
{
    // Do stuff
}