No InitializeDataSource Event in C#

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Buzurg in Jeanz posted over 16 years ago

I'm using UltraWebGrid on a web page. What I'm trying to do is, implement client-side paging. For this LoadOnDemand must be set to XML and InitializeDataSource event must be there. When I tried this in VB.NET it worked. But in C# I can't find InitializeDataSource event in property window. Writing this event in <igtbl:UltraWebGrid> tag in the ASPX file throws a compiler error.

Any thoughts? Quick response will be much appreciated.

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[Infragistics] Tony Lombardo posted over 16 years ago

Read my most recent post to my blog - Demystifying WebGrid Databinding

Short answer - the event is still there but it doesn't show up in intellisense. You can set the "OnInitializeDataSource" attribute in the grids ASPX to your handler, or manually add the event (grid.InitializeDataSource += ... ) in the OnInit page method.

-Tony
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Roger Bogh posted over 16 years ago in reply to [Infragistics] Tony Lombardo

Tony,Your blog entry is the only clear explanation on how to get the InitializeDataSource event back into play - but...
I could use an example that includes the ellipses (...). I don't need a complete hand-holding but a nice slap on the back would help. I keep getting slugged in the face, yuk, yuk...
I have never had to bind an event. I have seen some examples of Page_Unload and the like and they have parameters. My guess is that the InitializeDataSource will have some parameters as well. Also, if I use the InitializeDataSource event can I have access to the SelectedRows collection on a Button click postback? Currently, I can select rows till my hearts content but a postback initiated by a button clicks wipes out the collection. This forces me to use javascript to make a list of GUIDs to fill a request string on a new form. Uuuuggggghhhhh. Not very secure, and I think the length of the query string is limited. And, I already have the data if I can grab it after the customer clicks a button. I am actually trying to use the contents of a grid to populate full page reports using the 'Infragistics.Documents.Report' object. Very nice tool.
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Shital posted over 15 years ago in reply to H B

Thanks for reply.

I am getting following error

Compiler Error Message: CS1061: 'ASP.patientbrowser_aspx' does not contain a definition for 'PatientDataGrid_InitializeDataSource' and no extension method 'PatientDataGrid_InitializeDataSource' accepting a first argument of type 'ASP.patientbrowser_aspx' could be found (are you missing a using directive or an assembly reference?)

Shital
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H B posted over 15 years ago in reply to Shital

Could it be possible for you to create a small sample and upload it here? It will help to identify the issue quickly.
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Shital posted over 15 years ago in reply to H B

I am just trying to load data from two tables.

This is my grid'd defination

<igtbl:UltraWebGrid ID="PatientDataGrid" runat="server" Height="300px"
                            Width="100%" oninitializelayout="PatientDataGrid_InitializeLayout" oninitializedatasource="PatientDataGrid_InitializeDataSource"
                            style="font-family: Arial; font-size: x-small" ondblclick="RowDbClick"
                            Browser="Xml" EnableViewState="False"
                            >

<DisplayLayout AllowColSizingDefault="Free" AllowColumnMovingDefault="OnServer"
                                AllowDeleteDefault="Yes" AllowSortingDefault="OnClient"
                                AllowUpdateDefault="Yes" BorderCollapseDefault="Separate"
                                HeaderClickActionDefault="SortMulti" Name="UltraWebGrid1"
                                RowHeightDefault="20px" RowSelectorsDefault="No"
                                SelectTypeRowDefault="Single" StationaryMargins="Header"
                                StationaryMarginsOutlookGroupBy="True" TableLayout="Fixed" Version="4.00"
                                ViewType="Hierarchical" CellClickActionDefault="RowSelect"
                                LoadOnDemand="Xml">
                                <ClientSideEvents AfterSelectChangeHandler="GridRowSel" ClickCellButtonHandler="PatientDataGrid_ClickCellButtonHandler"
                                InitializeLayoutHandler="PatientDataGrid_InitializeLayoutHandler"
                                AfterCellUpdateHandler="PatientDataGrid_AfterCellUpdateHandler"

                                 />

And on server side added this code

private void PatientDataGrid_InitializeDataSource(object sender, Infragistics.WebUI.UltraWebGrid.UltraGridEventArgs e)
        {
            this.PatientDataGrid.DataSource = NewGetData();
        }

thanks

shital
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H B posted over 15 years ago in reply to Shital

Convert event handler from private to protected

Ex.

private void PatientDataGrid_InitializeDataSource to

protected void PatientDataGrid_InitializeDataSource

Let me know if solves the issue.
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Shital posted over 15 years ago in reply to H B

Yes , it is working now.

Thanks a lot

Shital
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