Specified argument was out of the range of valid values.

Question

1.00/5 (1 vote)

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I tried adding image onrowdatabound

What I have tried:

C#

string imgAsc = @" <img src='../Images\asc.png' title='Ascending' />";
string imgDes = @" <img src='../Images\des.png' title='Descendng' />";

if (e.Row.RowType == DataControlRowType.Header)
{
    foreach (TableCell cell in e.Row.Cells)
    {
        LinkButton lbSort = (LinkButton)cell.Controls[0];
        if (lbSort.Text == GridView1.SortExpression)
        {
            if (GridView1.SortDirection == SortDirection.Ascending)
                lbSort.Text += imgAsc;
            else
                lbSort.Text += imgDes;
        }
    }
}

Posted 28-Jul-16 15:49pm

Member 12652110

Updated 28-Jul-16 21:27pm

Tomas Takac

v2

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Patrice T · Answer 1 · 2016-07-28T21:27:00

Solution 1

The error message tells you that there is zero Controls.
Check the Count of Controls before assuming that Controls[0] exist.

[Update]
Use the debugger to see exactly where is the problem and the variables contain at the problem.

The debugger allow you to follow the execution line by line, inspect variables and you will see that there is a point where it stop doing what you expect.
Debugger - Wikipedia, the free encyclopedia[^]
Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]

The debugger is here to show you what your code is doing and your task is to compare with what it should do.
When the code don't do what is expected, you are close to a bug.

Posted 28-Jul-16 21:27pm

Patrice T

Updated 29-Jul-16 6:49am

v2

Comments

Member 12652110 29-Jul-16 10:06am

how do i do it?

Patrice T 29-Jul-16 10:08am

Try Controls.Count

Member 12652110 29-Jul-16 10:50am

int a = Controls.Count;
a= 0 and count = 3?
What should i put then

Patrice T 29-Jul-16 11:11am

Look at your code, Controls is not alone, it is cell.Controls.
So cell.Controls.Count

Member 12652110 29-Jul-16 11:54am

i have this method
if (e.Row.RowType == DataControlRowType.Header)
{
foreach (TableCell cell in e.Row.Cells)

{
int c = cell.Controls.Count;
LinkButton lbSort = (LinkButton)cell.Controls[1];
if (lbSort.Text == GridView1.SortExpression)
{
if (GridView1.SortDirection == SortDirection.Ascending)
lbSort.Text += imgAsc;
else
lbSort.Text += imgDes;
}
}
}

Member 12652110 29-Jul-16 10:51am

3 doesnt work

Member 12652110 29-Jul-16 11:54am

i got 1