Updating RadGrid Groups Client Side

[Alexandre Fromage]

Hi there,

I have a question about radGrid clien-side databinding, using WebServices.
In my RadGrid, I'm grouping datas function of a column. When I update dynamically(client-side) my datagrid, grouping doesn't seem to work well:
independently of the number of elements which belong to the group, this one have always have the same number of items.
Here, I'm grouping fonction of MembreConvers wich is a string.

	<MasterTableView ClientDataKeyNames="IdContact" GroupLoadMode="Client"
	NoMasterRecordsText="" ShowHeadersWhenNoRecords="true" Width="100%">
	<GroupByExpressions>
	<telerik:GridGroupByExpression>
	<SelectFields>
	<telerik:GridGroupByField FieldAlias="MembreConvers" FieldName="MembreConvers"
	HeaderText="Participe" />
	</SelectFields>
	<GroupByFields>
	<telerik:GridGroupByField FieldName="MembreConvers" />
	</GroupByFields>
	</telerik:GridGroupByExpression>
	</GroupByExpressions>
	<Columns>
	<telerik:GridMaskedColumn DataField="MembreConvers"
	SortExpression="MembreConvers">
	</telerik:GridMaskedColumn>
	<!-- Continue -->

And I'm updating it with that javascript, client-side. I need to pass args to my WebMethod, so I'm not using Telerik's codeLess method.

	//Called When WebService GetContactListForConversation return
	function SucceededCallbackGetParticipants(result, eventArgs) {
	//Conversation ID - and so window - is in eventArgs.
	//It allows us to get current conversation's radWindow
	var radWindowManager = GetRadWindowManager();
	var window_ = radWindowManager.getWindowById(eventArgs);
	if (window_ != null) {
	//Get the frame
	var frame = window_.get_contentFrame();
	//Get the window
	var windowContent_ = frame.contentWindow;
	var radGrid = windowContent_.$find("RadGridContacts");
	//Get Master TableView
	var tableView = radGrid.get_masterTableView();
	//Set dataSource and DataBind
	tableView.set_dataSource(result);
	tableView.dataBind();
	//Using setTimeout instead of setInterval(firefox compatible)
	setTimeout(function() { GetParticipantsForConversation(eventArgs) }, timeout);
	}

WebService returns List<Contact>:

	public class Contact
	{
	public string NomPrenom { get; set; }
	public int IdContact { get; set; }
	public string EnLigne { get; set; }
	public string MembreConvers { get; set; }
	// Continue here ....
	}

On page load, server-side, in "RadGridContacts_NeedDataSource" method I create MasterTableView like that:

	//Test
	List<Contact> contactsList = new List<Contact>();
	//there will be 2 groups : "Oui" and "Non".
	contactsList.Add(new Contact("", 0, true, "Oui"));
	contactsList.Add(new Contact("", 0, true, "Non"));   RadGridContacts.MasterTableView.DataSource = contactsList;
	/*And when I'm updating Client-side, group "Oui" and "Non" are limited to 1 item each. How can I fill them client-side?*/

Is there an easy trick to update these groups client-side?

Thanks a lot,

Alex.

[Alexandre Fromage]

I found that on the forum:
http://www.telerik.com/community/forums/reply-thread.aspx?messageId=0&threadId=190189
Hello kiwo,

RadGrid does not support grouping on the client, therefore there is no way that you can remove grouping only with javascript. You can call the table view's ungroupColumn('ColumnUniqueName') method from your javascript handler but it will make a postback on the server. So in any case a round-trip to the server is necessary for the ungrouping to be achieved.

Regards,
Tsvetoslav
the Telerik team

I've managed to do it another way.
Thx.