I have a dataset, obtained from a webservice which contains 2 tables (a parent and child). I am presently binding it to the webhierarchicaldata grid. I presently have a bound checkbox column from the child table which the user can change. To update the source data, I need to send the webservice the changes from the dataset (via the GetChanges dataset method). How can I obtain which child rows have been changed on the server side (after user clicks an ASP button - Save)?
Thanks,
Hung
Hello,
You can handle the RowUpdating event (or each other event corresponding to a CRUD operation - RowAdding, RowDeleting) and get this information from the event argument. Since e.Row will return references to the edited rows from both the parent and child bands, you can check the Level of the row (0 corresponds to parent, 1 corresponds to 1st level child and so on) and if the row comes from a child band you can add it to a list like this:
List rows = new List();if (((ContainerGridRecord)e.Row).Level == 1) { rows.Add(e.Row); }
You can also get e.Values to get collection of the updated values for the row.
I hope this helps. If you have any further questions, please do not hesitate to contact me, I will be glad to help.
So I added the following on my code behind, but if I put a breakpoint on it, I notice it does not fire. What other changes could be needed?
Private Sub WebHierarchicalDataGrid1_RowUpdating(sender As Object, e As Infragistics.Web.UI.GridControls.RowUpdatingEventArgs) Handles WebHierarchicalDataGrid1.RowUpdating
'Dim rows As New List()
If DirectCast(e.Row, ContainerGridRecord).Level = 1 Then
'rows.Add(e.Row)
End If
End Sub
From ASP Page:
<ig:WebHierarchicalDataGrid ID="WebHierarchicalDataGrid1" runat="server" Height="350px"
Width="100%" DataKeyFields="RoleID" DataMember="Parent" AutoGenerateBands="false"
AutoGenerateColumns="False" >
<Columns>
<%
-- <ig:BoundDataField Key="ID" DataFieldName="ID">
<Header Text="ID" />
</ig:BoundDataField>--
%>
<ig:BoundDataField Key="RoleID" DataFieldName="RoleID">
</ig:BoundDataField>
<ig:BoundDataField Key="Name" DataFieldName="Name">
<Header Text="Name" />
</Columns>
<Bands>
<ig:Band Key="ChildBand_0" DataKeyFields="RoleID,PRODUCT_CATEGORY_ID" DataMember="Child"
AutoGenerateColumns="False">
<ig:BoundDataField Key="PRODUCT_CATEGORY_ID" DataFieldName="PRODUCT_CATEGORY_ID">
<Header Text="PRODUCT_CATEGORY_ID" />
<ig:BoundCheckBoxField DataFieldName="ALLOW_FLAG" Key="ALLOW_FLAG" >
<Header Text="Permit" />
</ig:BoundCheckBoxField>
<ig:BoundDataField DataFieldName="SORT_ORDER_CODE" Key="SORT_ORDER_CODE" Hidden="true">
<Behaviors>
<ig:EditingCore >
<ig:CellEditing>
<ColumnSettings>
--<ig:EditingColumnSetting ColumnKey="ID" ReadOnly="true" />--%>
<ig:EditingColumnSetting ColumnKey="RoleID" ReadOnly="true" />
<ig:EditingColumnSetting ColumnKey="PRODUCT_CATEGORY_ID" ReadOnly="true" />
<ig:EditingColumnSetting ColumnKey="ALLOW_FLAG" />
<ig:EditingColumnSetting ColumnKey="SORT_ORDER_CODE" ReadOnly="true" />
</ColumnSettings>
<EditModeActions MouseClick="Single" />
</ig:CellEditing>
</Behaviors>
</ig:EditingCore>
</ig:Band>
</Bands>
</ig:WebHierarchicalDataGrid>
I created a web application and added the files provided in the previously attached sample.
My project is attached.
It seems to me that your VB file is looking out for an older version of the designer file.
The easiest solution maybe is to open your project as a website - open VS, press Alt+Shift+O, then give the next dialog the path to your project.
You can then try to run it and see if fixed your issue. You can also do right click in the solution explorer on the WebSite, then choose Convert to project.
Please let me know if the above helped.
Thanks, that removed the error and allowed me to run the code. However, if I place a breakpoint on whdg_RowUpdating, I never see it fire. I am checking and unchecking the checkboxes.
I have looked at that and it fires for me. Can you just attach the latest version of the project so we can be sure that we are working on the same things?
Thank you.
It is a VS2010 project running .NET 4.0
Hello,If you need any further assistance on the issue, please feel free to contact me, I will be glad to help you.
There were some issues because of the previous conversion of the sample (project to website and vice versa). I modified it and now the RowUpdating event fires correctly and the error it used to receive is now gone (Error 7 Handles clause requires a WithEvents variable defined in the containing type or one of its base types.)
I hope this helps.
Thank you for choosing Infragistics components !