Input string was not in a correct format.how to solve?

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Input string was not in a correct format.how to solve?

C#

protected void totalprice()
    {

       int quantity = 0;
     int price = 0;
int rowTotal = 0;
int subTotal = 0;
int totalprice = 0;
foreach(GridViewRow row in GridView1.Rows)
{
   quantity = Convert.ToInt32(row.Cells[3].Text); //replace 0 with row cell index of qty
   price = Convert.ToInt32(row.Cells[4].Text); //replace 1 with row cell index of amount
   rowTotal = quantity * price;
   subTotal += rowTotal;
}
totalprice = subTotal;
lbltprice.Text = totalprice.ToString();
    }

Posted 2-Dec-11 18:35pm

sathiyak

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Prince Antony G 3-Dec-11 0:59am

which line of code gives error..Dont repost Question again and again...

sathiyak 3-Dec-11 1:04am

quantity = Convert.ToInt32(row.Cells[3].Text); //here

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OriginalGriff · Answer 1 · 2011-12-02T20:46:00

Instead of Convert.ToInt32, try int.TryParse[^] - if it fails, you can do something sensible with the result yourself, instead of getting an exception:

C#

foreach(GridViewRow row in GridView1.Rows)
{
   if (!int.TryParse(row.Cells[3].Text, out quantity))
   {
      quantity = 0; // Or report the error to the user and abandon the job
   }
   ...