[Solved] Postback actual state on Load_Page event

[zDog]

Good day!

In the code snippet below I'm always getting RadListView1.SelectedValue from previous ViewState at Page_Load handler.
For example, when I press "3" in the listview, I get "" in LabelRadListView1SelectedValue. Next time I press "5" and get "3" and so on.

Why "RadListView1.SelectedValue" isn't actual at Page_Load event on PostBack?
For example, It's going well at Page_LoadComplete event. So why RadListView1 restored from ViewState after Page_Load event?
I'm confused. Please, help!

RadListVew.aspx:

<%@ Page Title="" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="RadListView.aspx.cs" Inherits="RadListV" %>

 

<%@ Import Namespace="Telerik.Web.UI" %>

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder1" runat="Server">

    <telerik:RadListView runat="server" ID="RadListView1" ItemPlaceholderID="PlaceHolderListContainer" DataKeyNames="data">

        <LayoutTemplate>

            <asp:PlaceHolder ID="PlaceHolderListContainer" runat="server"></asp:PlaceHolder>

        </LayoutTemplate>

        <ItemTemplate>

            <asp:LinkButton ID="LinkButton1" runat="server" CommandName="Select">

                <asp:Label runat="server" ID="Label1" Text='<%#Eval("data")%>' />

            </asp:LinkButton>

        </ItemTemplate>

        <SelectedItemTemplate>

            <span style="font-weight: bold;">

                <asp:LinkButton ID="LinkButton1" runat="server" CommandName="Select">

                    <asp:Label runat="server" ID="Label1" Text='<%#Eval("data")%>' />

                </asp:LinkButton>

            </span>

        </SelectedItemTemplate>

    </telerik:RadListView>

 

    <div>

        <asp:Label runat="server" ID="LabelRadListView1SelectedValue" />

    </div>

</asp:Content>


RadListVew.aspx.cs:

using System;
using System.Collections.Generic;
using System.Linq;
using Telerik.Web.UI;

public partial class RadListV : System.Web.UI.Page
{
    class ListItem
    {
        public int data { get; set; }
    }

    List<ListItem> ListDataSource
    {
        get
        {
            return (List<ListItem>)Session["ListDataSource"];
        }

        set { Session["ListDataSource"] = value; }
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (RadListView1.SelectedValue != null)
        LabelRadListView1SelectedValue.Text = RadListView1.SelectedValue.ToString();
    }

    protected void Page_Init(object sender, EventArgs e)
    {
        ListDataSource = new List<ListItem>();
        for (int i = 1; i < 5; i++)
        {
            ListDataSource.Add(new ListItem { data = i });
        }
        RadListView1.DataSource = ListDataSource;
    }
}

[Princy]

Hi,

As a suggestion please try to attach the OnSelectedIndexChanged event of RadListView  to access the SelectedValue.

C#:

protected void RadListView1_SelectedIndexChanged(object sender, EventArgs e)
{
    LabelRadListView1SelectedValue.Text = RadListView1.SelectedValue.ToString();
}

Thanks,
Princy.

[zDog]

It's works well too.