ASP.NET GridView RowCommand not firing

Posted by Community Admin on 14-Apr-2011 00:00

Hi,

I'm developing a SiteFinity 4 custom module in which I have an ASP.NET GridView which has a delete button and I'm trying to fire the OnRowDataBind and OnRowCommand events but it wont work.

My view template:


<%@ Control Language="C#" %>
<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>
 
<h1>
    Job Applications</h1>
 
<div style="padding: 20px;">
    <asp:Literal ID="litTest" runat="server" />
    <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
    CellPadding="4" ForeColor="#333333" GridLines="None">
    <AlternatingRowStyle BackColor="White" ForeColor="#284775" />
    <Columns>
        <asp:TemplateField HeaderText="First Name">
            <ItemTemplate>
                <%# Eval("FirstName") %>
            </ItemTemplate>
            <ItemStyle Width="150px" />
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Last Name">
            <ItemTemplate>
                <%# Eval("LastName") %>
            </ItemTemplate>
            <ItemStyle Width="150px" />
        </asp:TemplateField>
        <asp:TemplateField HeaderText="Phone">
            <ItemTemplate>
                <%# Eval("Phone") %>
            </ItemTemplate>
            <ItemStyle Width="150px" />
        </asp:TemplateField>
        <asp:TemplateField>
            <ItemTemplate>
                <asp:LinkButton ID="lnkDelete" runat="server" CommandName="cmdDelete" Text="Delete" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
    <EditRowStyle BackColor="#999999" />
    <FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
    <HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
    <PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
    <RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
    <SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
    <SortedAscendingCellStyle BackColor="#E9E7E2" />
    <SortedAscendingHeaderStyle BackColor="#506C8C" />
    <SortedDescendingCellStyle BackColor="#FFFDF8" />
    <SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>
</div>

My template class:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using Telerik.Sitefinity.Modules.Pages.Web.UI;

using Telerik.Sitefinity.Web.UI;

using Telerik.Web.UI;

using Telerik.Sitefinity.Libraries.Model;

using Telerik.Sitefinity.Model;

using System.Web.UI.WebControls;

using Telerik.Sitefinity;

using System.Web;

namespace Jobs.PublicControls

[RequireScriptManager]

public class BackendOverviewControl : SimpleView

protected override string LayoutTemplateName

get

return this.layoutTemplateName;

protected virtual GridView JobsGrid

get

return base.Container.GetControl<GridView>("GridView1", true);

protected virtual Literal litTest

get

return base.Container.GetControl<Literal>("litTest", true);

protected override void OnInit(EventArgs e)

JobsGrid.RowDataBound += new GridViewRowEventHandler(JobsGrid_RowDataBound);

JobsGrid.RowCommand += new GridViewCommandEventHandler(JobsGrid_RowCommand);

base.OnInit(e);

protected override void InitializeControls(GenericContainer controlContainer)

protected void JobsGrid_RowCommand(object sender, GridViewCommandEventArgs e)

if (e.CommandName == "cmdDelete")

litTest.Text = "You selected : " + e.CommandArgument.ToString();

/*using (var sf = App.Prepare().SetTransactionName("JobApplicationTransaction").WorkWith())

Document doc = sf.Documents().Where(d => d.Id.ToString() == e.CommandArgument.ToString()).Get().Single();

if (doc != null)

litTest.Text = doc.Title;

*/

protected void JobsGrid_RowDataBound(object sender, GridViewRowEventArgs e)

if (e.Row.RowType == DataControlRowType.DataRow)

Document doc = (Document)e.Row.DataItem;

if (doc != null)

LinkButton lnkDelete = (LinkButton)e.Row.FindControl("lnkDelete");

lnkDelete.CommandArgument = doc.Id.ToString();

protected override void OnPreRender(EventArgs e)

var module = new Jobs_Module();

JobsGrid.DataSource = module.getDocuments();

JobsGrid.DataBind();

base.OnPreRender(e);

private string layoutTemplateName = "Jobs.Resources.Views.BackendOverviewTemplate.ascx";

I have tried hooking up the event handlers in both the OnInit method and InitializeControls method.

Thanks,

Posted by Community Admin on 14-Apr-2011 00:00

Hello Raihan,

If you subscribe for GridView.RowDataBound inside InitializeControls the events are fired.

Regards,
Ivan Dimitrov
the Telerik team

Posted by Community Admin on 14-Apr-2011 00:00

Hi Ivan,

I moved the event handlers inside InitializeControls but the events are NOT fired. Please note this is an ASP.NET GridView control not RadGrid!

I placed a breakpoint on the RowCommand event handler to check if the event is fired or not.

protected override void InitializeControls(GenericContainer controlContainer)

JobsGrid.RowDataBound += new GridViewRowEventHandler(JobsGrid_RowDataBound);

JobsGrid.RowCommand += new GridViewCommandEventHandler(JobsGrid_RowCommand);

Posted by Community Admin on 14-Apr-2011 00:00

Hi Raihan,

If you subscribe for these events inside CreateChildControls there should not be a problem

protected override void CreateChildControls()


           base.CreateChildControls();
           // add data source

           GridView.RowCommand += new GridViewCommandEventHandler(GridView_RowCommand);
           GridView.DataBind();



If you want you can create your own base class that inherits from CompositeControl and use it

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Web.UI.WebControls;

using System.Web.UI;

using Telerik.Sitefinity.Web.UI;

using Telerik.Sitefinity.Web.UI.Templates;

using Telerik.Sitefinity.Abstractions;

using Telerik.Sitefinity.Configuration;

using Telerik.Sitefinity.Web.Configuration;

using Telerik.Sitefinity.Modules.Pages;

namespace Telerik.Sitefinity.Samples

public class CompositeControlCustom : CompositeControl, INamingContainer

protected override void CreateChildControls()

Controls.Clear();

if (Grid != null)

var pm = PageManager.GetManager();

Grid.DataSource = pm.GetPageNodes();

Grid.RowCommand += new GridViewCommandEventHandler(Grid_RowCommand);

this.Container.Controls.Add(Grid);

this.Controls.Add(Container);

Grid.DataBind();

void Grid_RowCommand(object sender, GridViewCommandEventArgs e)

public override void DataBind()

CreateChildControls();

ChildControlsCreated = true;

base.DataBind();

public virtual ITemplate Template

get

if (this.templateValue == null)

var tempInfo = new TemplateInfo()

TemplatePath = this.LayoutTemplatePath,

TemplateName = this.LayoutTemplateName,

TemplateResourceInfo = this.ResourcesAssemblyInfo,

ControlType = this.GetType(),

Key = TemplateKey

;

this.templateValue = ControlUtilities.GetTemplate(tempInfo);

return this.templateValue;

set

this.templateValue = value;

internal protected virtual GenericContainer Container

get

if (this.container == null)

this.container = this.CreateContainer(this.Template);

return this.container;

protected virtual Type ResourcesAssemblyInfo

get

var type = this.GetType();

if (type.Assembly == typeof(ObjectFactory).Assembly)

return Config.Get<ControlsConfig>().ResourcesAssemblyInfo;

return type;

protected internal virtual GenericContainer CreateContainer(ITemplate template)

GenericContainer container = new GenericContainer();

template.InstantiateIn(container);

return container;

public virtual string TemplateKey

get;

set;

protected virtual GridView Grid

get

return this.Container.GetControl<GridView>("GridView1", true, TraverseMethod.BreadthFirst);

private ITemplate templateValue;

private GenericContainer container;

public virtual string LayoutTemplatePath get; set;

public virtual string LayoutTemplateName get; set;

Best wishes,
Ivan Dimitrov
the Telerik team

Posted by Community Admin on 12-Jul-2011 00:00

Why not just add the argument:OnRowCommand="JobsGrid_RowCommand"
to the gridview? That should solve the problem.
Or am I missing something here?

Posted by Community Admin on 13-Jul-2011 00:00

Hi Michiel,

I prefer to subscribe for the events using CreateChildControls.

1. The class is related to the template with LayoutTemplatePath property, so this is not just a user control
2. If someone decide to override the event they can do it in CreateChildControls ( this is useful when you want to distribute an assembly and someone else to extend it if needed).

Regards,
Ivan Dimitrov
the Telerik team

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