I need a little help here. I created a set of cascading RadComboBoxes that worked great.
Then I decided to change the way my page worked and wrapped everything in a asp:FormView control so I could easily bind the entire form.
The problem is that now the cascading RadComboBoxes don't work using the example in the demo. Originally, there was a call to a function that loaded the first dropdown in the Page_Load event. I can't do this anymore though because the FormView hasn't been created yet and the control to load doesn't exist.
I've tried moving the call to the function that loads the first drop-down to the FormView1_ItemCreated event which loads the first dropdown, but only after the RadComboBox is created and therefore it throws an error with the SelectedValue='<%# Bind("councils") %>' property since the datasource hasn't been created yet.
I can't seem to figure out the proper sequence of events to get this working. Do you guys have an example of cascading RadComboBoxes in a FormView or can you suggest a way to do it? Thanks!
Then I decided to change the way my page worked and wrapped everything in a asp:FormView control so I could easily bind the entire form.
The problem is that now the cascading RadComboBoxes don't work using the example in the demo. Originally, there was a call to a function that loaded the first dropdown in the Page_Load event. I can't do this anymore though because the FormView hasn't been created yet and the control to load doesn't exist.
I've tried moving the call to the function that loads the first drop-down to the FormView1_ItemCreated event which loads the first dropdown, but only after the RadComboBox is created and therefore it throws an error with the SelectedValue='<%# Bind("councils") %>' property since the datasource hasn't been created yet.
I can't seem to figure out the proper sequence of events to get this working. Do you guys have an example of cascading RadComboBoxes in a FormView or can you suggest a way to do it? Thanks!
3 Answers, 1 is accepted
0
Hi Philip,
You could try binding the RadComboBox as shown in the following example: Combo In Grid.
I hope this helps.
Kind regards,
Simon
the Telerik team
Instantly find answers to your questions at the new Telerik Support Center
You could try binding the RadComboBox as shown in the following example: Combo In Grid.
I hope this helps.
Kind regards,
Simon
the Telerik team
Instantly find answers to your questions at the new Telerik Support Center
0
Val
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answered on 21 Jul 2008, 04:22 PM
Do you have an example with the combo in formview or grid with load on demand from web service?
I get the same error and I do not think is doable with the new combo. I was successfully using the "value" property of the old combo to bind in the form view ,Value='<%# Bind("councils") %>', but in the new version has been removed and I have to use SelectedValue.
In my case, I have combo with load on demand from web service in FormView and in ItemCreated event I prepopulate the combo with top 10 items starting with the current binding value so when it renders the control the selected value will be in the list. But when I run it it throws System.ArgumentOutOfRangeException: Selection out of range.
I tried all sorts of solutions but nothing works.
I get the same error and I do not think is doable with the new combo. I was successfully using the "value" property of the old combo to bind in the form view ,Value='<%# Bind("councils") %>', but in the new version has been removed and I have to use SelectedValue.
In my case, I have combo with load on demand from web service in FormView and in ItemCreated event I prepopulate the combo with top 10 items starting with the current binding value so when it renders the control the selected value will be in the list. But when I run it it throws System.ArgumentOutOfRangeException: Selection out of range.
I tried all sorts of solutions but nothing works.
0
Hi Val,
Please see this online example which shows one way of binding a ComboBox nested in Grid and this help article for another, different approach (you can assume that there is a RadComboBox instead of a MS DropDownList).
Kind regards,
Simon
the Telerik team
Instantly find answers to your questions at the new Telerik Support Center
Please see this online example which shows one way of binding a ComboBox nested in Grid and this help article for another, different approach (you can assume that there is a RadComboBox instead of a MS DropDownList).
Kind regards,
Simon
the Telerik team
Instantly find answers to your questions at the new Telerik Support Center