Programmatically access GridView columns and manipulate

Question

I have a GridView :

Answer 1

Yes there is.

1) You need to subscribe the RowDataBound event.
2) Give the LinkButton an ID.
3) Insert in codebehind

  protected void GridView1_RowDataBound(Object sender, GridViewRowEventArgs e)
  {
    if(e.Row.RowType == DataControlRowType.DataRow)
    { 
      LinkButton _bt = e.Row.FindControl("ID") as LinkButton;
      if(_bt != null)
      {
        // have a look at the e.row.DataItem and try to get the value of your desired visibility property
        _bt.Visible = true;
      }
    }
  }

4) If this does not work with accessing the DataItem, start thinking about a LinqDataSource.

Answer 2

You can do this by adding a handler to the RowDataBound event. Add an event handler along this lines of this in your code behind:

protected void myGrid_RowDataBound(Object sender, GridViewRowEventArgs e)
{
    var data = e.Row.DataItem as DataRowView;
    if (data != null)
    {
        var lbtDownload = e.Row.FindControl("lbtDownload");
        lbtDownload.Visible = (bool) data.Row["HasFileForDownload"];
    }
}

In your markup, attach the event handler to the grid:

<asp:GridView OnRowDataBound="myGrid_RowDataBound" ...>

You will also need to assign an id to the LinkButton, matching the one that you are search for using the FindControl() method in the event handler.

Disclaimer: I am on currently a Linux machine with no chance of testing this. Please report any bugs in the code - feel free to correct them if you have editor rights.