Hi,

I have a gridview, with a DropDownList TemplateField. I want this DDL (=DropDownList) to be visible by certain conditions.

For example: column "A" = DDL, column "B" = number. I want the DDL to be visible only if the number ("B") of the record is 5.

"A"                                    "B"

DDL not visible                   3

DDL visible                         5

How can this be done?

I recommend handling this during the RowDatabound event. To do this you will want to add this to the gridview.

onrowdatabound="GridView1_RowDataBound"

Then you will need to create the event handler in the code.

protected void GridView1_RowDataBound(Object sender, GridViewRowEventArgs e)
{
    if(e.Row.RowType == DataControlRowType.DataRow)
    {
        DropDownList ddl = (DropDownList)e.Row.FindControl("DropDownList1");
        if (e.Row.Cells[1].Text != "5")
        {
            ddl.Visible = false;
        }
    }
}

You will want to find which Cell contains the number you're looking for. There are obviously other solutions, but I like this one.  

I hope that works out for you,

Brendan