Gridview getting value of a BoundField set to Visible=False

Question

How can i get the value of a field that is set to Visible=false? as follows:

 <asp:BoundField DataField="ItemID" HeaderText="Line Item ID" Visible="false"/> 

but when i try to get it with

 int temID = Convert.ToInt32(row.Cells[0].Text);

It cant find it and throws an exception, but if I make it Visible="true" it works.

How can I retrieve the value if visible = false?

Answer 1

In the definition of your GridView, add

<asp:GridView .... DataKeyNames="ItemID" ...>

You also need to use OnRowDataBound, not OnDataBound

<asp:GridView .... DataKeyNames="ItemID" ... OnRowDataBound="GridView_RowDataBound">

Then in your code behind, something like this

protected void GridView_RowDataBound(Object sender, GridViewRowEventArgs e)
{
     if(e.Row.RowType == DataControlRowType.DataRow)
     {
          int ItemId = Int32.Parse(YourGridView.DataKeys[e.Row.RowIndex].Values[0].ToString());
     }
}

I did not test this code before posting. But this is the general idea of what you need to do. It may or may not work as is.

Answer 2

Another way without all those code is something like that:

<style type="text/css">
    .Hide
    {
        display: none;
    }
</style>

in the page or in your css file. And set this class to your boundField:

<asp:BoundField DataField="Id" ItemStyle-CssClass="Hide" HeaderStyle-CssClass="Hide" />

Hope this help.