title: Merging Edit and Delete Columns in Radgrid
body: <p>Is there a way to merge these two columns? This is what I have right now 
  <img src="https://i.stack.imgur.com/HaRD4.png" alt="enter image description here">. This is how I created these two columns from code-behind</p>
  
  <pre><code>                        GridEditCommandColumn EditColumn = new GridEditCommandColumn();
                          this.RadGrid1.MasterTableView.Columns.Add(EditColumn);
                          EditColumn.ButtonType = GridButtonColumnType.ImageButton;
                          EditColumn.UniqueName = "EditCommandColumn";
                          EditColumn.HeaderText = "SingleAction";
                          EditColumn.ColumnGroupName = "test";
  
                          GridButtonColumn DeleteColumn = new GridButtonColumn();
                          this.RadGrid1.MasterTableView.Columns.Add(DeleteColumn);
                          DeleteColumn.CommandName = "Delete";
                          DeleteColumn.ButtonType = GridButtonColumnType.ImageButton;
                          DeleteColumn.UniqueName = "DeleteCommandColumn";
                          DeleteColumn.ConfirmDialogType = GridConfirmDialogType.Classic;
                          DeleteColumn.HeaderText = "SingleAction";
                          DeleteColumn.ConfirmText = "Do you really want to delete?";
  </code></pre>
  
  <p>Now I want to achieve something like this
  <img src="https://i.stack.imgur.com/nNPud.png" alt="enter image description here">
  I have tried to do the GridCalculatedColumn like this </p>
  
  <p><code>GridCalculatedColumn calcol = new GridCalculatedColumn();<br>
   calcol.DataFields =new string[]{"EditCommandColumn","DeleteCommandColumn"};<br>
   calcol.Expression ="{0}-{1}";<br>
   tableViewProjects.Columns.Add(calcol);</code></p>
  
  <p>But, I cannot achieve what I want. I get an error column [EditCommandColumn] does not exist, which I think makes sense, because it not a data field from the database. 
   So, is there a way to achieve this. </p>
  
  <p>Please help,
  Thank you in advance</p>