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Unable to activate the InsertItemTemplate

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This is a migrated thread and some comments may be shown as answers.
david
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david asked on 27 Jun 2014, 12:28 PM
Hi,

I am trying to activate the InsertItemTemplate using button cmdAdd but I can't have it activated. What am I doing wrong?

Thanks in advance,
David

The Webform:
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
  <title></title>
</head>
<body>
  <form id="form1" runat="server">
  <telerik:RadScriptManager runat="server" ID="rsm"></telerik:RadScriptManager>
    <div>
      <telerik:RadListView ID="RadListView1" runat="server" ItemPlaceholderID="panel1">
        <LayoutTemplate>
          <fieldset>
            <table>
              <tr>
                <td>
                  <asp:Label ID="lblHeader01" runat="server" Text="header01" Width="160"></asp:Label></td>
                <td>
                  <asp:Label ID="lblHeader02" runat="server" Text="header02" Width="160"></asp:Label></td>
              </tr>
            </table>
            <panel id="panel1" runat="server"></panel>
            <asp:Button ID="cmdAdd" runat="server" Text="Add" OnClick="cmdAdd_Click"></asp:Button>
          </fieldset>
        </LayoutTemplate>
        <ItemTemplate>
          <fieldset>
            <table>
              <tr>
                <td>
                  <telerik:RadTextBox ID="txtItem01" runat="server" Text='<%# Eval("field01") %>'></telerik:RadTextBox>
                  <td>
                    <telerik:RadTextBox ID="txtItem02" runat="server" Text='<%# Eval("field02") %>'></telerik:RadTextBox>
                  </td>
              </tr>
            </table>
          </fieldset>
        </ItemTemplate>
        <EditItemTemplate>
          <fieldset>
            <table>
              <tr>
                <td>
                  <telerik:RadTextBox ID="Edit01" runat="server" Text='<%# Bind("field01")%>'></telerik:RadTextBox></td>
                <td>
                  <telerik:RadTextBox ID="Edit02" runat="server" Text='<%# Bind("field02")%>'></telerik:RadTextBox></td>
              </tr>
            </table>
          </fieldset>
        </EditItemTemplate>
        <InsertItemTemplate>
          <table>
            <tr>
              <td>
                <telerik:RadTextBox ID="Insert01" runat="server" Resize="None" Text='<%# Eval("field01")%>'></telerik:RadTextBox></td>
              <td>
                <telerik:RadTextBox ID="Insert02" runat="server" Resize="None" Text='<%# Eval("field02")%>'></telerik:RadTextBox></td>
            </tr>
          </table>
        </InsertItemTemplate>
      </telerik:RadListView>
      <br />
    </div>
  </form>
</body>
</html>

The Code Behind:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace xxx
{
  public partial class Test4 : System.Web.UI.Page
  {
    public class myExpedClass
    {
      public string field01 { get; set; }
      public string field02 { get; set; }
    }
    myExpedClass myExpedObject;
    List<myExpedClass> myList;
    protected void Page_Load(object sender, EventArgs e)
    {
      if (!IsPostBack)
      {
        // Instantiate
        myList = new List<myExpedClass>();
        // Record 01
        myExpedObject = new myExpedClass();
        myExpedObject.field01 = "R1C1";
        myExpedObject.field02 = "R1C2";
        myList.Add(myExpedObject);
        // Record 02
        myExpedObject = new myExpedClass();
        myExpedObject.field01 = "R2C1";
        myExpedObject.field02 = "R2C2";
        myList.Add(myExpedObject);
        // Link the list to the RadListView
        RadListView1.DataSource = myList;
        RadListView1.DataBind();
      }
    }
    protected void cmdAdd_Click(object sender, EventArgs e)
    {
      // Show InsertItemTemplate
      RadListView1.ShowInsertItem();
    }
  }
}

1 Answer, 1 is accepted

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Eyup
Telerik team
answered on 01 Jul 2014, 08:11 AM
Hello David,

Please note that performing complex list view operations such as Inserting, Deleting, Updating, Grouping, Paging, Sorting, Filtering, etc. require accommodating appropriate database operations. Therefore, we suggest you to avoid Simple Databinding (DataBind() method) and strongly recommend the use of more advanced databinding methods, which automatically handle the aforementioned functions:
  Declarative DataSource
  Advanced Data Binding
(NeedDataSource event)

Hope this helps. Please make the suggested modification and let me know about the result.

Regards,
Eyup
Telerik
 

Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.

 
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david
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Eyup
Telerik team
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