关于DropDownPanel [英] about DropDownPanel

问题描述

首先，感谢您分享您的知识.

我正在寻找要在C#项目中使用的树组合，并在codeproject中找到您的树，这是一个非常好的解决方案！但是实际上我在使用它时遇到一个问题:当我将控件包含在选项卡中时，在文件DropDownWindowHelper.cs上收到错误消息使用"new"创建对象的实例"，代码为:

Hi,

first of all, thanks for sharing your knowledge.

i was searching for some tree combo to use in a C# project and found yours here in codeproject, it''s a very good solution!!! but actually i am having one issue using it: when i include the control inside a tab i receive the error message "Use ''new'' to create an instance of the object" on file DropDownWindowHelper.cs, the code is:

public void ShowDropDown(Form Owner, Form DropDown, Point Location)

_owner = Owner;
_dropDown = DropDown;
Application.AddMessageFilter(_filter);// Start checking for the 
                                      // popup being cancelled
DropDown.StartPosition = FormStartPosition.Manual; // Set the location
                                                   // of the popup form:
DropDown.Location = Location;
Owner.AddOwnedForm(DropDown); // Make it owned by the window that's
                              // displaying it:

正在报告以下错误:

the error is being reported for:

Owner.AddOwnedForm(DropDown);

其中Owner为null.

我注意到当组合不在选项卡控件中时，一切正常.您对此行为有任何提示吗?

最好的问候，

jkarlos

where Owner is null.

i had noticed that everithing works just fine when the combo is out of the tab control. do you have any cue about this behaviour?

best regards,

jkarlos

推荐答案

我们不知道您在说什么文章.

返回找到的文章，然后滚动到页面底部.那里有一个论坛，上面有一个链接，上面写着新消息".那是您要发布问题的地方.这是一个普通论坛.

We have no idea what article you''re talking about.

Go back to the article you found and scroll to the bottom of the page. There is a forum down there and a link that says "New Messsage". That is where you want to post your question. This is a general forum.

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