ComboBoxAutoComplete gives ArgumentNullException when used in MDI ChildForm

Hi, We have an ComboBoxAutoComplete in a childForm of a MDI application. There is no problem to select an item from the dropdown list the first time entering the childform. But if you open another child form and comeback to the previous form, and click on the ComboBox, you get an exception: System.ArgumentNullException: Key cannot be null. Parameter name: key at Syncfusion.Windows.Forms.Tools.AutoComplete.GetControlAutoMode() I have attached a simple project that can reproduce the problem. (1)You run the application, (2)click File->New to open a child form, (3)click on the comboBox dropdown button, no problem. (4)Then click File->New to open a second childform, (5)Then go back to the first childform and click on the ComboBox dropdown button again, you get the exception. Any idea on how to solve the problem? Thanks Dongxian Li AutoComplateComboBoxIssue_5117.zip

By the way, we are using version 3.2.1.0. Can someone tell me about the status of the issue? So that I know it is not just ignored. As I saw other issues that submitted later than mine are being answered already. Thanks Dongxian

Hi Dongxian, Unfortunately, we are unable to guarantee any order or speed of responding to forum posts. While we do try to answer every forum post, we prioritize Direct-Trac incidents. In general, if you require a same day response, please create an incident. Regarding your problem, I was able to see it in our v3.3.0.0 release candidate. I''ve informed the appropriate engineer of this problem and he should be updating you sometime soon. Regards, Gregory Austin Syncfusion Inc.

Hi Dongxian, We regret for the inconvenience caused. We have checked the sample in this post and have found the bug. A report has been created based on this. We will look into this at the earliest. Please track the status of the bug here: Defect#627 Thanks for your patience. Regards, Anu.

Hi Dongxian, I have given you a wrong link in my previous post.Sorry for the inconvienience caused.You can track the bug status here. defect#627 Thanks, Anu.