RadComboBox SelectedItem not working

[Muhammad Irfan]

Hi Telerik Support,

I am having a problem with RadComboBox. I am not able to select the first item of RadComboBox programmatically. I have instantiated  a RadComboBox with 2 columns. I am giving user the ability to filter combo box based upon items present either in column 1 or 2. The search criteria may not necessarily appear in the beginning of the dropdown items, it may appear anywhere in the text. For example I have a dropdown with 2 columns with first column having "Project Engineer" and second "VAC-1001". My user types "1001" as search criteria and system brings one record, but that record (RadComboBoxItem) is not being selected.

I have set MarkFirstMatch property to "true". I tried setting SelectedItem to its text but getting below error:

"Property 'SelectedItem' is 'ReadOnly'."

I also tried using SelectedIndex, but that is also not working. Please help me select the first item. I am using 2010.2.713.35 verion of Telerik.Web.UI and Telerik.Web.Design.

If RadComboBox.Items.Count > 0 Then

 RadComboVacancyList.SelectedIndex = 0
End If

Many thanks.

[Kalina]

Hello Muhammad Irfan,

I am afraid that we will need more details about your implementation.
Could you please send us a simplified runnable page where we will be able to observe the issue?
Do you use Load On Demand?
I was not able to understand what you mean by “… but that record (RadComboBoxItem) is not being selected.”?  Do you want the item to be selected or you expect it to be highlighted?

All the best,
Kalina
the Telerik team

[Muhammad Irfan]

I sorted that out myself. 

Thanks

[Nils C.]

Hi Muhammad,
would you mind telling us how? We've got the same issue.

Best

[Karlo]

Had the same experience. RadComboBox SelectedItem Property is Read-Only (v. 2011 q3 SP1). My solution was

...
radComboBox.SelectedIndex = radComboBox.FindItemIndexByText(dataItemValue);
...

[danparker276]

So that above works I guess.  Is this the best way to do it?  I've been doing WPF/Silverlight for the past 3 years, what pain that this doesn't work easy

[Boyan Dimitrov]

Hello,

Indeed the provided solution works fine and selects the specific item that has  "textValue" value as Text property.
//code behind

RadComboBox1.SelectedIndex = RadComboBox1.FindItemIndexByText("textValue");

Alternative way of achieving that functionality would be to iterate through all items and set that specific item Selected property to true.
//code behind

for (int i = 0; i < RadComboBox1.Items.Count; i++)
       {
           if (i == 2)
           {
               RadComboBox1.Items[i].Selected = true;
           }
       }

All the best,
Boyan Dimitrov
the Telerik team