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Hide column names in gridview

Posted on 2011-03-25
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Last Modified: 2012-05-11
I have Gridview where the first 4 columns are link buttons, next 6 columns come from the database and then I add 2 more columns to the datatable that is bound to the gridview.

I am trying to hide a couple of the columns from the db from the user but still need to access their values in the codebehind. I would perfer to hide these columns by name.

Thanks for the help.
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Question by:DowntownIT
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12 Comments
 
LVL 5

Expert Comment

by:bitref
ID: 35215762
You may get all data in a datatable then create a dataview to include required data onle. Set the dataviewas the data source for the grid.
0
 
LVL 2

Author Comment

by:DowntownIT
ID: 35216097
I don't see a way to remove or hide columns from the dataview. Is there a way?
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LVL 7

Expert Comment

by:foobarr
ID: 35218545
Grid1.Columns("columnname").Visible = false
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LVL 2

Author Comment

by:DowntownIT
ID: 35218599
This doesn't work for me. When I supply the index of the column, I get an index out of range. Trying it with the name as suggested, I get a conversion from string to integer error.

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LVL 5

Expert Comment

by:bitref
ID: 35218695
The index is zero-based. So, try to subtract 1 from the column order.
0
 
LVL 2

Author Comment

by:DowntownIT
ID: 35218726
I did do that, The grid in the designer only has 4 columns but then I add more columns from the server side through the datatable. It is these columns that I need access to. I am able to hide any of the first 4 with no problems.
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LVL 31

Expert Comment

by:MlandaT
ID: 35294561
Hide the columns in the RowDataBound event for the grid.

        protected void GridViewResults_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            e.Row.Cells[0].Visible = false;
        }

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Finding the column index might be a bit tricky, but you perhaps use something like this:

NumberOfFixedGridColumns + myTable.Columns.IndexOf(NameOfColumnToHide)

e.g.  e.Row.Cells[4 + myTable.Columns.IndexOf["ContractValue"]].Visible = false;

0
 
LVL 2

Author Comment

by:DowntownIT
ID: 35314476
MlandaT,

Looks like this is almost there, I am getting an index out of range error. Looks like maybe paging is causing an issue. When I step through the code, I don't get the error until to what it looks like to be the footer where the pages are at. Does this sound right?
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LVL 31

Accepted Solution

by:
MlandaT earned 2000 total points
ID: 35314692
perhaps let's check to make sure that it is a DataRow like so...

        protected void GridViewResults_RowDataBound(object sender, GridViewRowEventArgs e)
        {
            if(e.Row.RowType == DataControlRowType.DataRow) 
            {
                   e.Row.Cells[0].Visible = false;
            }
        }

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LVL 2

Author Closing Comment

by:DowntownIT
ID: 35315041
That worked except that I changed it to look for the DataControlRowType.Pager row.

Thanks for the help!
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