Hey
We have a problem with the drag-and-drop feature of the RadComboBox:
The bug occurs when we have two ComboBoxes and in the OnChange event we sort the items of the first ComboBox. When we move now one item (for example the third) to the other ComboBox with drag-and-drop and then back to its initial position, the order of the items in the left ComboBox is wrong.
We currently us the version 2015.2.826.35 of Telerik.
Please see the attached files. Thank you very much!
Best regards,
Mathias
5 Answers, 1 is accepted
0
Hello Mathias,
Just to make sure that we are on the same page - do you experience the described issue with the RadCombox or with the RadListBox? In the attached images, I can only revise an implementation of RadListBoxes. If the problem is regarding the RadComboBox. please provide us with the implementation that you use. In addition, it would be much easier for us to test your implementation, if it is provided with a code-snippet, instead of an image, describing the code.
Regards,
Nencho
Telerik
Just to make sure that we are on the same page - do you experience the described issue with the RadCombox or with the RadListBox? In the attached images, I can only revise an implementation of RadListBoxes. If the problem is regarding the RadComboBox. please provide us with the implementation that you use. In addition, it would be much easier for us to test your implementation, if it is provided with a code-snippet, instead of an image, describing the code.
Regards,
Nencho
Telerik
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Explore the
Telerik Feedback Portal
and vote to affect the priority of the items
0
Mathias
Top achievements
Rank 1
answered on 12 Oct 2015, 01:46 PM
Thanks for your replay, Nencho.
You're right, of course. The problem comes with the RadListBox, not the RadComboBox. Sorry for the confusion!
You're right, of course. The problem comes with the RadListBox, not the RadComboBox. Sorry for the confusion!
0
Mathias
Top achievements
Rank 1
answered on 12 Oct 2015, 01:49 PM
Here the code snippets.. I had problems with the Internet Explorer ;)
ASPX:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="RadListBox_Sort.aspx.cs" Inherits="Post.Appl.Corp.Design.WPL_Telerik.Pages.Bugs.RadListBox_Sort" %>
<!DOCTYPE html>
<
html
xmlns
=
"http://www.w3.org/1999/xhtml"
>
<
head
runat
=
"server"
>
<
title
>RadListBox</
title
>
</
head
>
<
body
>
<
form
id
=
"form1"
runat
=
"server"
>
<
telerik:RadScriptManager
ID
=
"scriptManager"
runat
=
"server"
/>
<
telerik:RadListBox
runat
=
"server"
ID
=
"listSource"
Width
=
"20%"
Height
=
"200"
EnableDragAndDrop
=
"True"
SelectionMode
=
"Multiple"
AllowReorder
=
"False"
AllowTransfer
=
"True"
TransferToID
=
"listTarget"
AutoPostBackOnTransfer
=
"True"
OnTransferred
=
"OnChanged"
>
</
telerik:RadListBox
>
<
telerik:RadListBox
runat
=
"server"
ID
=
"listTarget"
Width
=
"20%"
Height
=
"200"
EnableDragAndDrop
=
"True"
SelectionMode
=
"Multiple"
AllowReorder
=
"False"
AllowTransfer
=
"true"
TransferToID
=
"listSource"
>
<
ButtonSettings
ShowTransfer
=
"False"
ShowTransferAll
=
"False"
/>
</
telerik:RadListBox
>
<
asp:Button
runat
=
"server"
Text
=
"Reset"
OnClick
=
"ResetClick"
/>
</
form
>
</
body
>
</
html
>
Code-Behind:
using
System;
using
System.Web.UI;
using
Telerik.Web.UI;
namespace
Post.Appl.Corp.Design.WPL_Telerik.Pages.Bugs
{
public
partial
class
RadListBox_Sort : Page
{
protected
void
Page_Load(
object
sender, EventArgs e)
{
if
(!IsPostBack)
{
InitListBox();
}
}
private
void
InitListBox()
{
listSource.Items.Clear();
listTarget.Items.Clear();
var item =
new
RadListBoxItem(
"1_Anna"
,
"1"
);
listSource.Items.Add(item);
item =
new
RadListBoxItem(
"2_Astrid"
,
"2"
);
listSource.Items.Add(item);
item =
new
RadListBoxItem(
"3_David"
,
"3"
);
listSource.Items.Add(item);
item =
new
RadListBoxItem(
"4_Fred"
,
"4"
);
listSource.Items.Add(item);
item =
new
RadListBoxItem(
"5_Goliath"
,
"5"
);
listSource.Items.Add(item);
item =
new
RadListBoxItem(
"6_Hans"
,
"6"
);
listSource.Items.Add(item);
item =
new
RadListBoxItem(
"7_Julian"
,
"7"
);
listSource.Items.Add(item);
}
protected
void
OnChanged(
object
sender, RadListBoxTransferredEventArgs e)
{
listSource.Items.Sort(x => x.Text);
}
protected
void
ResetClick(
object
sender, EventArgs e)
{
InitListBox();
}
}
}
0
Hello Mathias,
Indeed the custom sorting cannot be applied at this event handler, when the items are transferred using the drag&drop functionality. There is an internal logic applying the indexation of the items, which prevents the sorting from execution.
In order to achieve the desired functionality, I would suggest to you to apply the sorting at the Page_PreRender state of the page's Lifecycle:
Regards,
Nencho
Telerik
Indeed the custom sorting cannot be applied at this event handler, when the items are transferred using the drag&drop functionality. There is an internal logic applying the indexation of the items, which prevents the sorting from execution.
In order to achieve the desired functionality, I would suggest to you to apply the sorting at the Page_PreRender state of the page's Lifecycle:
protected void Page_PreRender(object sender, EventArgs e)
{
listSource.Items.Sort(x => x.Text);
listSource.DataBind();
}
Regards,
Nencho
Telerik
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Explore the
Telerik Feedback Portal
and vote to affect the priority of the items
0
Mathias
Top achievements
Rank 1
answered on 19 Oct 2015, 11:58 AM
Hi Nencho
Thank you very much for your solution.
It worked :)
Best regards,
Mathias