Hey Ganesh,

Lets take a step back so I can understand exactly what you are trying to achieve. Your initial post (and perhaps Trausti's response may have skewed my interpretation), seemed to indicate that you wanted the header checkbox to select all the rows that matched a particular value. Based on that understanding, I recommended setting the HeaderCheckBoxSynchronization to None to keep the cell values from being automatically synchronized to match the state of the header checkbox.

Since you are looking for synchronization, it seems that my initial understanding was incorrect. 

• What behavior are you looking for in regards to the header checkbox? 
• What happens when it is clicked? 
• What should happen when a cell's value changes? 
• What is the DataType of the column? 
• What version/build of NetAdvantage are you using?

In regards to the expansion indicator, you can change the grid.DisplayLayout.Override.ExpansionIndicator property to 'CheckOnDisplay' so the grid checks for child rows when it displays the parent row.

Thanks,

Chris

And also how to take off the expand(+) button for those who don't have the child records.

Thanks,

Ganesh

I may be not understanding your question correctly, but I think you want to enable one field while all other are disabled. If this is correct, then you can set the CellActivation on column level:

Private Sub grd_InitializeLayout(ByVal sender As System.Object, ByVal e As Infragistics.Win.UltraWinGrid.InitializeLayoutEventArgs) Handles grd.InitializeLayout
        Dim band As UltraWinGrid.UltraGridBand
        Dim col As UltraWinGrid.UltraGridColumn

        band = e.Layout.Bands(0)

If you then want to enable\disable the cell based on a value in the row,  then you can do that in InitializeRow:

Private Sub grd_InitializeRow(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinGrid.InitializeRowEventArgs) Handles grd.InitializeRow
        If e.Row.Cells("MyCol").Value = "1" Then
            'Disable based on a value
            e.Row.Cells("MyCol").Activation = UltraWinGrid.Activation.Disabled
        End If
    End Sub

Trausti

Many Thanks Trausti and Chris.

It worked for me.

Having one more problem

How to enable checkboxes with readonly datarow.

I have tried with allowupdate but it is enabling the data on row editable.

Please let me know any other precise solution for it.

Thanks,

Ganesh