[Solved] telerik RadComboBox error message "capacity was less than the current size."

[wissam]

I am receiving the error message"capacity was less than the current size.Parameter name: capacity"
  when selecting one of the comboboxitems and then click on the next page link (combobox bottom)

 
This is the properties which I set
<telerik:RadComboBox ID="cbDistrict" runat="server" DataTextField="DistrictName"

 

 

 

DropDownWidth="200px" MaxHeight="200px" DataValueField="DistrictId"

 

 

EnableLoadOnDemand="true" EnableVirtualScrolling="true" ShowMoreResultsBox="true" Width="153px"

 

 

 

EnableItemCaching="true" OnClientItemsRequesting="OnDistrictItemsRequesting"

 

 

OnClientSelectedIndexChanged="OnDistrictSelectedIndexChanged" OnClientTextChange="OnDistrictTextChange"

 

 

 

OnClientLoad="OnDistrictComboBoxLoaded">

 

 

 

[Beth Krawczuk]

I had received this error too.

I was using load on demand with a webservice. 

The error came when the user typed some information into the textbox.  The attribute “MarkFirstMatch” caused the dropdown to select an item and the call back to the webservice now had conflicting information in the amount of records. So removing the attribute “MarkFirstMatch” was all it took to prevent the error.

Sorry I don’t have more detailed information, I meant to post this yesterday when I was in front of the scenario.

My scenario seems to be a little bit different from yours I just wanted to make notes on the same error.

Thanks,
Beth

[Simon]

Hi there,

I tried to reproduce the issue with the current information without success.

Could you provide the ComboBox code and declaration which are needed to fully reproduce the issue so that I could do so at my side?

Ideally open a support ticket and send us a running project or a page which exhibit the issue - we will inspect it right away.

Thank you in advance for your co-operation.

Greetings,
Simon

[wissam]

Hi,
this bug can be produced on your demo site http://demos.telerik.com/aspnet-ajax/combobox/examples/populatingwithdata/autocompletesql/defaultcs.aspx , please  make sure that you do the steps to produce exactly as the following :

1 -selecting one of the comboboxitems

2- click on the next page link (combobox bottom)

Note : try the second combo box , it seems occurred only if there is huge number of items in the combo box.

[Atanas Korchev]

Hi wissam,

The problem was in the example itself. The WebService had a problem trying to instantiate a List() object with negative capacity (App_Code/Product.cs):

result = new List<RadComboBoxItemData>(endOffset - itemOffset);

To fix it you can change it like this:

result = new List<RadComboBoxItemData>();

Kind regards,
Albert
the Telerik team

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