Specified cast is not valid,

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C#

double total = 0;

            foreach (DataGridViewRow row in gvpurchase.Rows)
            {
                if (!row.IsNewRow && row.Cells["paid"].Value != null)
                {
                    total += (double)row.Cells["paid"].Value;

                    //Convert.ToInt32(["paid"]);
                }
            }

            lbltotal.Text = total.ToString("N2");
        }




    }

What I have tried:

I get grid view sum amount in label for windows application, but i got a error Specified Cast is not valid, how to solve this error. Any one please give me ideas.

Posted 14-Feb-16 19:58pm

Boopalslm

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Comments

Manoj Sawant 15-Feb-16 2:05am

Debug your code and check what value you get in "row.Cells["paid"].Value"

Boopalslm 15-Feb-16 2:10am

"paid" is my database table column name

CPallini 15-Feb-16 2:28am

OK, but you should check, at runtime, using the debugger the actual value of row.Cells["paid"].Value.

Sinisa Hajnal 15-Feb-16 3:14am

My guess would be that paid is not null, but is not a number...what is the column type of paid? If it is not numeric format, why not? If it is, check that database and your code process use same number format, you may have problems with decimal point and thousand separator mix-up.

F-ES Sitecore 15-Feb-16 10:47am

Try

total += double.Parse(row.Cells["paid"].Value);

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ZurdoDev · Answer 1 · 2016-02-15T04:41:00

Solution 1

This line of code is the issue:

C#

total += (double)row.Cells["paid"].Value;

The error says you cannot convert to double whatever is in row.Cells["paid"].Value. Perhaps it is a blank. Regardless, debug the code and you'll see.

Posted 15-Feb-16 4:41am

ZurdoDev