Unplanned
Last Updated: 04 Mar 2020 12:47 by ADMIN

When items with different values have the same text, a postback is not triggered when selecting another item with the same text as the current selection. The workaround is to place the following script under the ScriptManager:

Telerik.Web.UI.RadMultiColumnComboBox.prototype._shouldPostbackOnChange = function myfunction() {
    return true;
}

Reproduction code:

<telerik:RadMultiColumnComboBox ID="RadMultiColumnComboBox1" DataKeyNames="Additional" runat="server" DropDownWidth="Auto" AutoPostBack="true" >
    <ClientEvents OnSelect="OnSelect" />
    <ColumnsCollection>
        <%--<telerik:MultiColumnComboBoxColumn Field="ID"></telerik:MultiColumnComboBoxColumn>--%>
        <telerik:MultiColumnComboBoxColumn Field="Name"></telerik:MultiColumnComboBoxColumn>
        <telerik:MultiColumnComboBoxColumn Field="Additional"></telerik:MultiColumnComboBoxColumn>
    </ColumnsCollection>
</telerik:RadMultiColumnComboBox>
<script>
    function OnSelect(sender, args) {
        //alert("selection changed");
    }
    // Workaround
    Telerik.Web.UI.RadMultiColumnComboBox.prototype._shouldPostbackOnChange = function myfunction() {
        return true;
    }
</script>

public class MyClass
{
    public int ID { get; set; }
    public string Name { get; set; }
    public string Additional { get; set; }
}
protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        RadMultiColumnComboBox1.DataSource = Enumerable.Range(1, 20).Select(x => new MyClass()
        {
            ID = x,
            Name = "Same Item text" ,
            Additional = "DataKey#" + x
        });
        RadMultiColumnComboBox1.DataTextField = "Name";
        RadMultiColumnComboBox1.DataValueField = "ID";
        RadMultiColumnComboBox1.DataBind();
    }
}

 

 

Unplanned
Last Updated: 03 Jan 2020 15:15 by ADMIN
Created by: Daniel
Comments: 1
Category: MultiColumnComboBox
Type: Feature Request
0
What is the best approach to AutoSize the contents of the columns in a RadMultiColumnComboBox?  Is there a method or property I can use?
Unplanned
Last Updated: 23 Dec 2019 09:38 by ADMIN

Currently, the RadMultiColumnComboBox has smaller height than the AutoCompleteBox or the RadComboBox for example. 

A possible workaround can be using the following styles: 

<style>
    .RadMultiColumnComboBox .k-dropdown-wrap {
        padding: 4px 12px;
    }

    .RadMultiColumnComboBox .k-select {
        width: 1.42857143em;
        height: 1.42857143em;
        position: absolute;
        box-sizing: content-box;
        top: 0;
        bottom: 0;
        right: 0;
        left: auto;
        padding: 6px;
    }
</style>

Unplanned
Last Updated: 28 Nov 2019 12:33 by ADMIN
Created by: Jochen
Comments: 0
Category: MultiColumnComboBox
Type: Feature Request
1

Currently, the only example for setting up virtualization is with .svc service.

In Development
Last Updated: 01 Nov 2019 11:24 by ADMIN
Created by: Milind
Comments: 4
Category: MultiColumnComboBox
Type: Feature Request
1

Hello,

 

Load on demand feature is requested in multicolumn combobox

 

Thanks,

 

Milind Shevade

Completed
Last Updated: 13 May 2019 14:00 by ADMIN
Created by: Daniel
Comments: 4
Category: MultiColumnComboBox
Type: Feature Request
3
The new MultiColumnComboBox control does not have any server side events.  Can you provide the same server side event that you have for the ComboBox? 
Unplanned
Last Updated: 30 Apr 2019 19:27 by ADMIN
Currently, to make the MultiColumnComboBox control work in an EditTemplate of a Grid in Batch EditMode, custom implementation is needed as explained in Batch Editing Working With Templates and demonstrated here: Show short date, edit full date with batch editing
Pending Review
Last Updated: 18 Jan 2019 13:53 by ADMIN
Created by: Alem
Comments: 1
Category: MultiColumnComboBox
Type: Feature Request
0
We have just upgraded to the latest asp.net ajax version and excited about the new control 'RadMultiColumnComboBox', but we could not figure out how we can allow multiple selections.

Please let us know

Thanks,