Error in format string

Question

1.00/5 (2 votes)

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C#

try
           {
               LblDinarKarton.Text =
                       (from DataGridViewRow row in dataGridView6.Rows
                        where Convert.ToDouble( row.Cells[10].FormattedValue.ToString().Replace(",","")) != 0
                        select (Convert.ToDouble(row.Cells[10].FormattedValue.ToString().Replace(",", "")) * Convert.ToDouble(row.Cells[2].FormattedValue.ToString().Replace(",", ""))) + ((Convert.ToDouble(row.Cells[10].FormattedValue.ToString().Replace(",", "")) / Convert.ToDouble(row.Cells[3].FormattedValue.ToString().Replace(",", ""))) * (Convert.ToDouble(row.Cells[4].FormattedValue.ToString().Replace(",", ""))))).Sum().ToString();
           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message);
           }

What I have tried:

C#

try
           {
               LblDinarKarton.Text =
                       (from DataGridViewRow row in dataGridView6.Rows
                        where Convert.ToDouble( row.Cells[10].FormattedValue.ToString().Replace(",","")) != 0
                        select (Convert.ToDouble(row.Cells[10].FormattedValue.ToString().Replace(",", "")) * Convert.ToDouble(row.Cells[2].FormattedValue.ToString().Replace(",", ""))) + ((Convert.ToDouble(row.Cells[10].FormattedValue.ToString().Replace(",", "")) / Convert.ToDouble(row.Cells[3].FormattedValue.ToString().Replace(",", ""))) * (Convert.ToDouble(row.Cells[4].FormattedValue.ToString().Replace(",", ""))))).Sum().ToString();
           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message);
           }

Posted 19-Feb-20 23:12pm

waleed_akre

Updated 19-Feb-20 23:44pm

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Richard MacCutchan · Accepted Answer · 2020-02-19T23:45:00

Given all that spaghetti code, I am not surprised. Don't use single statements with so many compound parts like that. And don't use Convert.ToDouble, especially in compound statements, as it is impossible to find problems if the string is not valid. Use Double.TryParse so you can catch errors in the text.

And if you want to know why the string has an error then use your debugger to see what it contains. As it stands no one can possibly guess what it is.