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Problem with Related ComboBox using Filter property

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ComboBox
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Sam
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Sam asked on 12 Dec 2010, 07:32 AM
Hello,

I have a related RadComboBox demo like this link. It works fine.

However, I try to add Filter property for RadCombobox Country (Filter="Contains"), I have a problem.

I select an item of RadComboBox Continent then at first mouse click on RadComboBox Country, the item list of RadCombobox Country is shown as empty but the items count of RadComboBox Country > 0. I leave out of RadCombobox Country and then I click on RadCombobox Country again, the item list is shown as full.

Would be grateful for any ideas to show the item list of RadComboBox Country at first click.  Thank you.

Sorry my English.

Here is my code:

<telerik:RadComboBox ID="RadComboBox1"
                runat="server"
                Width="186px"
                CssClass="ComboBox_Continents"
                Filter="Contains"
                OnClientSelectedIndexChanging="LoadCountries"
                OnItemsRequested="RadComboBox1_ItemsRequested" />


<telerik:RadComboBox ID="RadComboBox2"
                runat="server"
                Width="186px"
                CssClass="ComboBox_Countries"
                Filter="Contains"
                OnClientItemsRequested="ItemsLoaded"
                OnItemsRequested="RadComboBox2_ItemsRequested" />

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Simon
Telerik team
answered on 12 Dec 2010, 04:58 PM
Hello Sam,

This is a bug when using manual Load On Demand and the filtering mechanism, which is a very rare case. 

As we are going to address it in the future, as a workaround, please modify the ItemsLoaded function in the way shown below:

function ItemsLoaded(combo, eventArqs)
    if(combo.get_items().get_count() > 0)
    {
        // pre-select the first item
        combo.set_text(combo.get_items().getItem(0).get_text());
        combo._filterText = combo.get_text(); // OR = "";
        combo.get_items().getItem(0).highlight();
    }
    combo.showDropDown();
}


This will filter the Items after they load with the text in the input, which is that of the first Item, and only it will show in the drop down. If you want to show *all* Items in this case, set the _filterText property to empty string.

Finally the drop down resizing glitch you see in the first case is a bug, which we also know and will fix in the future. You can work it around by setting a specific height to that RadComboBox.

I hope this helps.

Greetings,
Simon
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Sam
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answered on 15 Dec 2010, 07:48 AM
Hello Simon,

It works fine. Thanks for your response.
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Sam
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