Datagridviewrow hiding cells

Question

1.00/5 (1 vote)

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I'm trying to hide a row if the cell says 'processing'

private void MainSystem_Load(object sender, EventArgs e)
{

foreach (DataGridViewRow dr in dataGridView4.Rows)
{
if (dr.Cells[7].Value.ToString() == "Processing")
{
dr.Visible = false;
}
}
}

But I'm getting an error message when I run it of ...

'An unhandled exception of type 'System.ArgumentOutOfRangeException' occurred in mscorlib.dll

Additional information: Index was out of range. Must be non-negative and less than the size of the collection.'

However when I change the 'cells[]' number to a smaller number the program runs but it without the code working.

What I have tried:

Re-writing code, changing the 'cells[]' number

Posted 6-Dec-17 15:00pm

Member 13512434

Updated 6-Dec-17 16:30pm

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Karthik_Mahalingam · Accepted Answer · 2017-12-06T16:30:00

Quote:
Additional information: Index was out of range. Must be non-negative and less than the size of the collection.'

The error clearly says that you are trying to access an index in the collection which is not present.
In c# most of the collections works on zero based index, if you are trying to access the 7th column in the datagridview then you will have to provide the index value as 6.
You shall validate as below

foreach (DataGridViewRow dr in dataGridView4.Rows)
           {
               int targetColumnIndex = 6;
               if (dr.Cells.Count > targetColumnIndex)  // validate the index
                   if (dr.Cells[targetColumnIndex].Value.ToString() == "Processing")
                   {
                       dr.Visible = false;
                   }
           }