blocks|key|1690274|text|检查此设置：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1690275|工具>选项>+Windows窗体设计器>常规:+AutoToolboxPopulate|1690276|它应该设置为True，这样才能正常工作。|1690277|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Check this setting:

Tools > Options > Windows Forms Designer > General : AutoToolboxPopulate

It should be set to True for this to work.

blocks|key|1690495|text|在我的例子中，AutoToolboxPopulate已经设置好了(Visual+C#+2010学习版)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1690496|但是，我必须从工具箱的属性中激活"Show+All“(右键单击)才能真正看到我的新用户控件。|1690497|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

In my case, the AutoToolboxPopulate was already set (Visual C# 2010 Express).

However, I had to activate "Show All" from the properties of the Toolbox (right click) to actually see my new user controls.

blocks|key|1690655|text|用户控件可能不会出现在工具箱中的另一个原因是它们没有默认构造函数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1690656|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Another reason that user controls may not show up in the toolbox is if they do not have a default constructor.

blocks|key|1475258|text|还要仔细检查您的用户控件是否具有有效的命名空间。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1475259|我刚刚发现没有命名空间的控件不会放在ToolBox中。|1475260|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

Also double check that your user controls have a valid Namespace. 

I just found that controls without namespace are not placed inside the ToolBox.

blocks|key|1475191|text|通常，您需要构建解决方案。这对我来说几乎总是有效的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1475192|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Usually you need to build the solution. That almost always works for me.

blocks|key|1690717|text|我的控件是公共的，它在“选择工具箱项”对话框中被选中，但它仍然没有显示出来。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1690718|这就是最终对我有效的方法：|1690719|右键单击“工具箱”中的某处，然后单击“选择项”。当我找到我的物品时，它已经被检查过了。然后，我取消选中该项目，然后单击okay。接下来，我再次右键单击工具箱，并搜索我的项目...它不见了，所以我点击Browse，导航到obj/x86/debug文件夹并选择my+exe。然后将该项正确添加到工具箱中。|1690720|我认为这是一个VS错误。|1690721|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|L|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|M|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

My control was public, it was checked in the 'Choose Toolbox Items' dialog, but it was still not showing up.

This is what finally worked for me:

Right click somewhere in the Toolbox and click 'Choose Items'. When I found my item it was already checked. I then unchecked the item and clicked okay. Next I right clicked the toolbox again and searched for my item... it was gone, so I clicked Browse, navigated to the obj/x86/debug folder and selected my exe. The item was then added correctly to the toolbox.

I think it's a VS bug.

blocks|key|1475684|text|除了已经给出的所有指令(工具>选项>+Windows+Forms+Designer+>常规:+AutoToolboxPopulate)+%2B您需要构建解决方案(这对我来说很明显)，您可能必须注意类访问修饰符:它必须是公共的。我刚创建了一个控件，没有出现在工具箱列表中，我也不知道为什么。所以在set之后|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1475685|public+class++yourClass:control+{}|code-block|syntax|javascript|1475686|比它在列表中出现的更多。;)希望这能帮助其他人。|1475687|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Apart all instructions that have been given(Tools > Options > Windows Forms Designer > General : AutoToolboxPopulate) + you need to build the solution (which is obvious for me) you will probably have to pay attention to the class access modifier: it MUST be PUBLIC. 
I just created a control and did not appeared in toolbox list and I did not knew why. So after set 

<pre><code>public class yourClass:control {}
</code></pre>

than it appeared in list. ;)
Hope this will help others.

blocks|key|1475455|text|检查您的构建输出目录。如果出于某种原因，您要在项目bin\目录之外的其他位置构建输出，则您的控件将不会显示在工具箱中。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1475456|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Check your build output directory. If for some reason you are building your output somewhere other than the project bin\ directory, your controls won't show up in your toolbox.

blocks|key|1475884|text|这就是我的问题:我为我的控件添加了一个新的构造函数，它接受了一些参数，但我没有显式地重新声明空的构造函数！工具箱只能包含具有空构造函数的控件。通常，当你在vb中设计一个类时，它有一个隐式定义的空构造函数(这意味着你不需要声明一个)。但是，一旦你开始设计自己的构造函数，这个空的构造函数就消失了，所以你需要在你的代码中显式地重新定义它！无论如何，我意识到大多数有经验的vb程序员已经知道了这一切，但希望这能帮助一些像我这样的新手:)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1475885|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Here was my problem:
I had added a new constructor for my control which accepted a few arguments, but I had not explicitly re-declared the empty constructor! The toolbox can only include controls which have empty constructors.
In general, when you are designing a class in vb, it has an empty constructor defined implicitly (meaning you don't need to declare one). BUT, as soon as you start designing your own constructors, this empty constructor disappears, so you need to explicitly redefine it in your code!
Anyways, I realize most experienced vb coder's already know all this, but hopefully this can help some newbies like myself :).

blocks|key|1475314|text|我通常做的是创建一个新的选项卡，并将exe/dll添加到该选项卡中...由于加载时间和一般的麻烦，对该解决方案不太满意。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1475315|我的一个朋友告诉我一种加快速度的方法。而不是点击“选择项目...”在工具箱等中，对于您创建的每个新控件，您可以创建一个名为MyCustomControls的文件，在那里您可以创建自定义控件。|offset|length|style|CODE|1475316|现在你只需要做“选择项目...”并添加此文件一次。如果您以后决定添加一个新控件，请在MyCustomControls中创建它，然后重新生成。|1475317|然后，您的工具箱将拥有您的新控件。(如果你有AutoToolboxPopulate，我想它会在常规编译的时候自动显示)|1475318|这是不幸的，因为您通常希望将类划分为“每个文件一个类”。仅仅因为VS不想按照你的方式来做，你就不得不毁掉你的代码架构，这太可怕了。:)|1475319|我对这个解决方案也不太满意，但是如果你需要做一些快速的事情，并且你不关心一个文件中的多个用户控件，或者只是懒惰，这个解决方案可能很适合你。:)|1475320|entityMap^0|0|1P|G|0|16|G|0|M|J|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@$D|T|E|U|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|V|8|@$D|W|E|X|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|Y|8|@$D|Z|E|10|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|11|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|12|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|Q|$]]

What I usually do is create a new tab and add the exe/dll to that tab... Not too comfortable with that solution because of the load time and general hassle.

A friend showed me a way to speed this up. Instead of having to click "Choose Items..." in the toolbox,etc, for each new control you make - You can create a file named <code>MyCustomControls</code> and there you can create your custom controls.

Now you only have to do the "Choose Items..." and add this file ONCE. If you later on decide to add a new control, create it in <code>MyCustomControls</code> and then rebuild. 
Then your toolbox will have your new control. (It will be displayed automatically with a regular compile if you have <code>AutoToolboxPopulate</code> I think)

This is unfortunate, because often you want to separate classes into "one class per file". It is horrible that you have to ruin your code architecture just because VS doesn't want to do it your way. :)

I am not too comfortable with this solution either but if you need to do something quick and you don't care about multiple user controls within a file or just are lazy, this might suit you well. :)

blocks|key|1475421|text|以上所有操作都有可能失败。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1475422|我通过创建一个新的用户控件(TestControl)修复了它，它触发了Visual+Studio神奇地将我项目的控件选项卡%2B控件添加回工具箱。然后我就删除了测试控件。|1475423|顺便说一句，这发生在我最近安装了VS2008自动windows更新之后。|1475424|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

It is possible for all of the above to fail.

I fixed it by creating a new user control (TestControl) and it triggered Visual Studio to magically add my project's controls tab + controls back into the Toolbox. Then I just deleted the test control.

This happened to me after recently installing a VS 2008 automated windows update, by the way.

blocks|key|1475704|text|如果你仍然找不到为什么你的vstudio工具箱没有填充你的用户控件。然后，您可以使用另一个visual+studio调试vstudio。Here+you+can+find+how。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1475705|entityMap|0|LINK|mutability|MUTABLE|url|http://stivodotnet.blogspot.ch/2013/03/how-to-know-why-your-visual-studio.html^0|1W|L|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

If you still can't find why your vstudio toolbox is not populated with your usercontrols. Then you can debug vstudio with another visual studio. <a href="http://stivodotnet.blogspot.ch/2013/03/how-to-know-why-your-visual-studio.html" rel="nofollow">Here you can find how</a>.

blocks|key|1690911|text|在我的例子中，错误的原因是指向我的控件的.dll的路径长度过长。我把它缩小了一点，一切都变得很好。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1690912|我还发现路径中的特殊符号(例如我使用的#)会影响控件显示。|1690913|希望它能解决这个问题。|1690914|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

In my case the reason of error was an excess length of a path to my control's .dll. I had shrunk it a bit and everything became working fine.

Also I found out that the special symbols (e.g. I used #) in a path affect a control display.

Hope it solves the issue.

blocks|key|1691052|text|我试图构建一个仅限x64的应用程序，所以我的平台目标当然是设置为x64。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1691053|然而，即使在2016年，Visual+Studio+(devenv.exe)仍然是一个32位进程，它不能加载64位程序集。要检查Visual+Studio的位数，请打开任务管理器并检查进程名称处的*32。|1691054|在工具箱中查看控件的解决方法:在项目设置中将平台目标设置为Any+CPU。如有必要，对Debug和Release+build执行此操作。|1691055|entityMap^0|W|3|0|R|A|2Q|3|0|T|7|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@$9|P|A|Q|B|C]|$9|R|A|S|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|T|8|@$9|U|A|V|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|K|$]]

I was trying to build a x64 only application, so my platform target was set to <code>x64</code> of course.

However, even in 2016, Visual Studio (<code>devenv.exe</code>) is still a 32 bit process and it cannot load 64 bit assemblies. To check the bitness of your Visual Studio, open Task Manager and check for <code>*32</code> at the name of the process.

Workaround to see the Controls in the toolbox: set the platform target to <code>Any CPU</code> in the project settings. Do that for Debug and Release build, if necessary.

blocks|key|1476025|text|正如前面提到的here，你应该告诉visual+studio在工具箱中加载你的用户控件。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1476026|[ToolboxItem(true)]
public+class+PanelTitle+:+LabelControl++{
//+Whatever+code+to+override+LabelControl+here...
}|code-block|syntax|javascript|1476027|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/1116311/how-to-put-an-extended-winforms-control-on-toolbox/1116335#1116335^0|7|4|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

As mentioned <a href="https://stackoverflow.com/questions/1116311/how-to-put-an-extended-winforms-control-on-toolbox/1116335#1116335">here</a> you should tell the visual studio to load your usercontrol in toolbox. 

<pre><code>[ToolboxItem(true)]
public class PanelTitle : LabelControl {
// Whatever code to override LabelControl here...
}
</code></pre>

blocks|key|1690765|text|当我尝试将我的UserControl添加到工具箱中(右键单击工具箱，选择项目，选择我的动态链接库)，它会显示一条消息，说明我的动态链接库中没有控件。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1690766|无论如何，通过尝试在VS中的DLL中创建一个表单并添加UserControl，问题就解决了。显示一条错误消息，说明没有默认构造函数|1690767|public+UserControl()+{
...
}|code-block|syntax|javascript|1690768|设计者需要它，因为它不知道什么是有效参数。一旦我向UserControl添加了一个空的构造函数，它就被添加到了工具箱中，没有任何问题。|1690769|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

When I tried to add my UserControl to the toolbox (right click toolbox, choose items, select my DLL) it would display a message saying there were no controls in my DLL.

Anyway, the problem was solved, by trying to create a form in my DLL in VS and adding the UserControl. An error message displayed saying there was no default constructor

<pre><code>public UserControl() {
...
}
</code></pre>

The designer needs this because it can't know what valid arguments are. Once I added a blank constructor to the UserControl it was added to the toolbox without issue.

blocks|key|1476148|text|在尝试添加自定义控件之前，请确保它与当前项目的.Net版本兼容。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1476149|我试图将自定义控件添加到VS2008上Windows+CE5.0和.Net压缩v3.5项目的工具箱中。我做了所有之前的建议，但都没有奏效。即使在“选择项目”菜单中选中了“显示全部”，控件也会显示出来，但它是灰色的。|1476150|我用.Net+v2.0创建了一个新项目，它工作得很好。|1476151|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

Before trying to add a custom control, make sure that it is compatible with the .Net version of your current project.

I was trying to add a custom control to toolbox for a project for Windows CE 5.0 and .Net Compact v3.5 on VS2008.
I did all those previous suggestions but nothing worked. The control shows up when "show all" is checked but it is grayed , even in "Choose Items" menu is checked.

I created a new project with .Net v2.0 and it worked perfectly.

blocks|key|1475743|text|hello+its答案Ctrl%2BAlt%2BX+take+this+and+later+have+TOOLBOX+:)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1475744|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

hello its answer Ctrl+Alt+X take this and later u have TOOLBOX :)

I have some UserControls that I created in ProjectA. I have ProjectB that has a windows form that I want to put the controls on. Both of these projects are in a single solution. There's a reference to ProjectA from ProjectB so it can "see" the UserControls.

However, the UserControls do not show up in the toolbox for me to drag to the windows form.

I've tried rebuilding. I've also deleted the 'bin' directory to force a rebuild-all.

How do I get VS2008 to populate the toolbox with my UserControls?

User Controls not showing up in the toolbox

Visual Studio

Windows

我有一些我在ProjectA中创建的UserControls。我有一个ProjectB，它有一个windows窗体，我想把控件放在它上面。这两个项目都在一个解决方案中。ProjectB中有一个对ProjectA的引用，所以它可以“看到”UserControls。但是，UserControls不会显示在工具箱中，以便我拖到windows窗体上。我试过重建。我还删除了'bin‘目录以强制执行rebui

问未显示在工具箱中的用户控件
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