Infragistics4.Web.v13.1, Version=13.1.20131.2107
I'm trying to utilize a usercontrol as the rowedittemplate for a childband in my WHDG. The idea behind the UC is that it should dynamically represent the data being edited: different controls will be visible for different data in the bands.
Q/P1): is there a way to prevent the UC from being rendered with every childband record? There could be 1000's...
Q/P2): how do I bind serverside to some public properties of the UC? Since it appears the UC instances are loading with every record (see above), I could cut down on the amount of html being rendered by only making visible the controls I am concerned with for each row. Using two public properties "Parameter" and "Selections", I have tried this type of setup in the template:
<ig:RowEditingTemplate CancelButton="buttonCancel" OKButton="buttonOK"> ... <Template> <uc1:ucSetParameter ID="ucSetParameter1" runat="server" Parameter='<%# DataBinder.Eval(((Infragistics.Web.UI.TemplateContainer)Container).DataItem, "ParameterName") %>' Selections='<%# DataBinder.Eval(((Infragistics.Web.UI.TemplateContainer)Container).DataItem, "CurValue2") %>' /> </Template> </ig:RowEditingTemplate>
but cannot determine the correct binding container reference, I either get "not part of namespace" or "doesn't contain this property" errors (I've confirmed the dataset does match the "ParameterName" key & case) whenever I try alternate container references.
Any help appreciated.
Hello arsinfragistics,
Thank you for posting in our community !
Currently the WHDG does not allow rendering a common row editing template for multiple child bands as the template uniqueness and instantiation per band allows configuring the template for each band individually.
In this scenario, I would suggest defining a custom template class implementing the ITemplate interface and instantiating the template per-child band based on the specific child band which is being created/expanded.
This approach is based mostly on the following documentation article:
http://help.infragistics.com/Help/NetAdvantage/ASPNET/2012.1/CLR4.0/html/WebDataGrid_Using_Client_Bindings.html
In this case, the RowIslandCreated event is employed for the task:
protected void WebHierarchicalDataGrid1_RowIslandCreated(object sender, Infragistics.Web.UI.GridControls.RowIslandEventArgs e) { //get whatever data is needed about the new child band bool shouldDisplayFirstTemplateLabel = true; if (e.RowIsland.Rows.Count < 5) { shouldDisplayFirstTemplateLabel = false; } e.RowIsland.Behaviors.EditingCore.Behaviors.RowEditTemplate.Template = new customChildTemplate(shouldDisplayFirstTemplateLabel); } } class customChildTemplate : ITemplate { public customChildTemplate(bool displayNameLabel1) { ShouldDisplayLabel1 = displayNameLabel1; } private bool ShouldDisplayLabel1 { get; set; } public void InstantiateIn(Control container) { if (ShouldDisplayLabel1) { Label label1 = new Label(); label1.Text = "CompanyName"; label1.ID = "NameLabel1"; container.Controls.Add(label1); } TextBox textBox1 = new TextBox(); textBox1.ID = "NameTextBox1"; Button b1 = new Button(); b1.Text = "OK"; b1.ID = "OkButton"; b1.UseSubmitBehavior = false; b1.OnClientClick = "return"; b1.CausesValidation = false; Button b2 = new Button(); b2.Text = "Cancel"; b2.ID = "CancelButton"; b2.UseSubmitBehavior = false; b2.OnClientClick = "return"; b2.CausesValidation = false; container.Controls.Add(textBox1); container.Controls.Add(b1); container.Controls.Add(b2); } }
The same approach may be used when templating a user control inside the RET. Attached is my sample for your consideration.
Please do not hesitate to contact me if you have any questions.
Is there no server-side binding available for rowedittemplates? For example, if I create a template column, the WHDG automatically uses the server-side binding of:
<ig:TemplateDataField Key="ParameterName" Width="20%">
<ItemTemplate>
<asp:Label ID="Label1" runat="server"><%# DataBinder.Eval(((Infragistics.Web.UI.TemplateContainer)Container).DataItem, "ParameterName") %></asp:Label>
</ItemTemplate>
<Header Text="Parameter" />
</ig:TemplateDataField>
But I can't seem to create a similar binding within the rowedittemplate?
Thanks,
Please feel free to contact me if you need any additional information regarding this matter.
Thank you for your reply.
In this scenario it is not possible to achieve this requirement through the markup using the DataBinder, as theDataItemassociated with the RET is in fact a GridBehavior object and in that respect has no connection to any record (and keep in mind that only one row editing template is instantiated for all rows in a container grid).
Therefore I would suggest considering the serverside approach in this case.
Do not hesitate to contact me if you need more information.