Thanks.

But it seems that PerfomAction have no effect. I get an error if i try to do SelStart after  

grid.PerformAction(UltraGridAction.EnterEditMode)

Error: (selStart are not supported while the cell is not in edit mode)

How about using a method like this:

        private void YourUltraGrid_AfterRowInsert(object sender, Infragistics.Win.UltraWinGrid.RowEventArgs e)
        {
            YourUltraGrid.ActiveRow = e.Row;
            YourUltraGrid.ActiveCell = e.Row.Cells["FirstColumnName"];
            YourUltraGrid.PerformAction(UltraGridAction.EnterEditMode, false, false);
            YourUltraGrid.ActiveCell.SelStart = 0;
        }

This uses the AfterRowInsert of the grid, and worked perfectly when I tested it on a project this morning. Good luck!

It should have work. But I get an error on selstart ( not supported while cell is not in edit mode). Maybe it has something to do with the databinding? I got no error if I mouse click the grid first.

BTW: AfterRowInsert is not fired in my case, but a row is in fact inserted.

I have tried to change the code and moved all the row insert into the click event for the "insert new row button".

// Insert a new object. The grid will then automatically insert a new row via bindingsource

// Norwegian word is not easy to read for you but it is something like this if the grid is databind to objectcollection called BOCollection:

// BOCollection.Add(New BOItem(Id));

// Jump to the last newly created row. This PerformAction work fine.

// Set the column "Tekst" in the active row as activ cell.

// Try to set active cell in editmode. This does not work. No errormessage

// The next statement will trigger an error message "... are not supported while cell is not in editmode)

It seems to me that you should be setting focus to the cell using the click of the button. You don't need a grid event for this.

 
        private void button1_Click(object sender, EventArgs e)
        {
            DataRow row  = this.dt1.NewRow();
            this.dt1.Rows.Add(row);
            this.ultraGrid1.Rows[this.ultraGrid1.Rows.Count - 1].Cells[0].Activate();
            this.ultraGrid1.PerformAction(UltraGridAction.EnterEditMode);
            this.ultraGrid1.ActiveCell.SelStart = 0;
        }   

Yes, I agree.  I have moved all the code regarding row insert into the button_click. See my earlier post today. But it has no effect on the result.

The biggest difference in your example is when inserting rows:

DataRow row  = this.dt1.NewRow();
            this.dt1.Rows.Add(row);

But I use something like this to insert a new row:

BOCollection.Add(New BOItem(id))

Where BOCollection og BOItem is business objects.

 Assuming you BOCollection is an IBindingList and notifies the grid that a new row has been added, this should not make any difference at all. The code I posted here works fine for me. What's not working for you? 

Sorry for digging out such an old post ... Google send me here after searching for a solution to this exact same problem I had at work. Took a while to explore everything and finally we found out the cause of the error :   the cell activation mode was set as "NoEdit" in the initialization of the Form.

    Columns("NewDelai").CellActivation = Activation.NoEdit

so whenever we try to force the edit mode on this cell programmatically, we ended up with the same error OP got.

     ugRapport.PerformAction(UltraGridAction.EnterEditMode)
     ugRapport.ActiveCell.SelStart = 0

Hope this can help others too !

By trial and error...I've fixed the problem -- or at least worked around it. This is a threading issue on the Ultragrid. If I call: grid.PerformAction(Infragistics.Win.UltraWinGrid.UltraGridAction.EnterEditMode) directly (on the first row, first cell) it just doesn't work. However, if I set up a delegate and invoke the delegate, it works fine:

Private Delegate Sub PerformAction()

Sub WinGridPerformAction()
        grid.PerformAction(Infragistics.Win.UltraWinGrid.UltraGridAction.EnterEditMode)
End Sub

Sub InitGrid()
        grid.DataSource = myDataSource
        grid.Focus()
        grid.DisplayLayout.Rows(0).Cells(0).Activate()
        Me.BeginInvoke(New PerformAction(AddressOf WinGridPerformAction))
End Sub

I am having the exact same problem. Can anyone help?

No matter what I do and where I do it, the first cell is active, but will not enter edit mode without a mouse click.

the row is active, teh cell is active, but Performaction(.....EnterEditMode) just doesn't make it go into edit mode! ARRRGGGH driving me nuts.

maggreen: did you find any solution for this? I am having the exact problem.

I managed to work around this with the following code:

row.Cells(0).Activate()

grid.PerformAction(UltraGridAction.FirstCellInRow)

grid.PerformAction(UltraGridAction.EnterEditMode)