Code to replicate the issue:
<telerik:RadMultiColumnComboBox ID="RadMultiColumnComboBox1" runat="server">
</telerik:RadMultiColumnComboBox>
<telerik:RadToolTip runat="server" ID="RadToolTip2" Title="Company Short Name" TargetControlID="RadMultiColumnComboBox1" ShowEvent="OnFocus" Width="200px" Position="MiddleRight">
Tooltip Content
</telerik:RadToolTip>
Next, focus on the MultiColumnComboBox, but the ToolTip won't show.
Hello,
Load on demand feature is requested in multicolumn combobox
Thanks,
Milind Shevade
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>
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();
}
}
Currently, the only example for setting up virtualization is with .svc service.