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Back button with checkboxes in combo box.

2 Answers 76 Views

ComboBox

This is a migrated thread and some comments may be shown as answers.

Abram asked on 26 Feb 2013, 04:05 PM

I am having issues with the back button when using the combo box.

In Chome when I select item one, click off the combo box, then select item one and two, click off the combo box and then hit the browser back button, it shows one in the text but one and two checked.

In IE, with the same steps, it shows one is checked but one and two as the selected text.

How would you suggest having the back button return the combo box return to the previous state where the checked items and selected text match - either in the example or with an update panel?

Thanks in advance for any help.

Here is the code:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="del.aspx.cs" Inherits="del" %>

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

<title></title>

</head>

<body>

<form id="form1" runat="server">

<telerik:RadScriptManager ID="RadScriptManager" runat="server"></telerik:RadScriptManager>

<div>

<telerik:RadComboBox ID ="ddlCounty" runat="server" DataSourceID="LDS" OnSelectedIndexChanged="ddlCounty_SelectedIndexChanged" DataTextField="name" DataValueField="value" CheckBoxes="true" AutoPostBack="true" EnableViewState="true"></telerik:RadComboBox>

<asp:LinkButton ID="LinkButton1" runat="server" OnClick="LinkButton1_Click">LinkButton</asp:LinkButton><asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>

</div>

<asp:linqdatasource runat="server" id="LDS" OnSelecting="Selecting_LDS" OnSelected="OnSelecting_LDS"></asp:linqdatasource>

</form>

</body>

</html>

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Threading;

using System.IO;

public partial class del : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

}

protected void LinkButton1_Click(object sender, EventArgs e)

{

}

protected void Selecting_LDS(object sender, LinqDataSourceSelectEventArgs e)

{

var l = new List<Object>()

{

new {value = 1, name = "one"},

new {value = 2, name = "two"},

new {value=3, name = "three"}

};

e.Result = l;

}

protected void ddlCounty_SelectedIndexChanged(object sender, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)

{

string[] result = (from i in ddlCounty.CheckedItems

select i.Value).ToArray<string>();

Label1.Text = string.Join("-", result);

}

protected void OnSelecting_LDS(object sender, LinqDataSourceStatusEventArgs e)

{

}

2 Answers, 1 is accepted

Accepted

answered on 01 Mar 2013, 02:38 PM

Hello Abram,

In order to maintain the checked state as well as the text of the RadComboBox the approach from the following help article could be used. In your scenario the values of the checked items could be stored in the hidden field and then these items to be manually checked when the user returns to the page via the Back button.

Regards,
Dimitar Terziev
the Telerik team

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