Question

I have a GridView and a list of items in a ListBox. Excluding the first column in the GridView.

I want to tooltip each and every header with the corresponding item in the ListBox. I mean the tooltip for GridView2.Columns[i].HeaderText = ListBox.Items[i].Tostring().

Here is what I have tried:

protected void GridView2_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.Header)
        {
            for (int i = 1; i < GridView2.Columns.Count; i++)
            {
                String header = GridView2.Columns[i].HeaderText; 

                if (header.Length != 0)
                {
                   e.Row.Cells[i].ToolTip = ListBox4.Items[i].ToString().Trim();
                }
            }
        }
    }

This is giving me an exception error: Index was out of range. Must be non-negative and less than the size of the collection.

Kindly help. Thank you.

Answer 1

protected void GridView2_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.Header)
    {
        for (int i = 1; i < GridView2.Columns.Count; i++)
        {
            String header = GridView2.Columns[i].HeaderText; 

            if (header.Length != 0)
            {
               e.Row.Cells[i+1].ToolTip = ListBox4.Items[i].ToString().Trim();
            }
        }
    }
}

Just suppose to use Cells[i+1] instead of Cells[i]