blocks|key|982864|text|确保您已经正确安装了Windows+10+SDK，有3-4个版本的SDK，您正在讨论的错误也可能是不兼容SDK的结果，还可以重新安装与应用程序相关的sdk，关闭与Visual相关的每个进程，在重新安装sdk时在后台运行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|982865|您能共享xaml设计器页面的屏幕截图吗？|982866|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|$]]

make sure you have correctly installed the Windows 10 SDK, there are 3-4 versions of the SDK, the error you are talking about can also be a consequence of a incompatible sdk,
also reinstall the sdk related to your app, close every process related to Visual studio running in background while reinstalling the SDK.

Can you share a screenshot of the xaml designer page?

blocks|key|982907|text|在VisualStudio2017安装程序中，我选择了所有SDK并安装了缺失的SDK。这本身并没有解决问题，但随后VisualStudio2017安装程序的“修复”(可从“汉堡包”下拉菜单中获得)解决了问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|982908|有时，从安装程序中添加或删除SDK会在Tools+->+Options+->+XAML+Designer+->+General下切换“Enable”复选框(或者是修复步骤将其重新打开)，因此请确保选中此复选框。|982909|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 the Visual Studio 2017 Installer, I selected all of the SDKs and installed the missing ones. This did not fix the problem by itself, but a subsequent 'repair' from the Visual Studio 2017 Installer (available from the 'hamburger' drop-down) did.

Sometimes, adding or removing SDKs from the Installer toggles the 'Enable XAML Designer' check box under Tools -> Options -> XAML Designer -> General (or perhaps it was the repair step that turned this back on), so ensure that this is checked.

blocks|key|982954|text|我无法让设计师工作，但我找到了一个由这里发布的替代解决方案，由@DamianSuess发布|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|982955|使用Visual中的视图>其他窗口>+Xamarin.Forms预览器菜单打开预览窗口。使用“窗口”>“新建垂直选项卡组”菜单将其并排放置.|blockquote|style|BOLD|982956|表格-非视觉显示-演播室|982957|entityMap|0|LINK|mutability|MUTABLE|url|https://forums.xamarin.com/discussion/70095/xaml-previewer-for-xamarin-|1|https://forums.xamarin.com/profile/DamianSuess^0|I|2|0|V|C|1|0|A|P|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]|$A|Y|B|Z|1|10]]|C|$]]|$1|D|3|E|5|F|7|11|8|@$A|12|B|13|G|H]]|9|@]|C|$]]|$1|I|3|J|5|6|7|14|8|@]|9|@]|C|$]]|$1|K|3|-4|5|6|7|15|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]|S|$5|N|O|P|C|$Q|T]]]]

I couldn't get the designer to work, but I found an alternate solution posted <a href="https://forums.xamarin.com/discussion/70095/xaml-previewer-for-xamarin-" rel="noreferrer">here</a>, posted by <a href="https://forums.xamarin.com/profile/DamianSuess" rel="noreferrer">@DamianSuess</a>
<blockquote>
Use the View &gt; Other Windows &gt; Xamarin.Forms Previewer menu in
Visual Studio to open the preview window. Use the Window &gt; New
Vertical Tab Group menu to position it side-by-side.
</blockquote>
forms-not-show-in-visual-studio

blocks|key|2274051|text|坦白说，你的情况和我的不一样。在我的情况下，是因为Resharper。也许这对其他人有用。要做的是检查Resharper+>+Enviroment+>+Performance+>禁用XAML设计器。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2274052|它必须设置为“忽略”或“在状态栏中显示”。否则，它将始终禁用XAML设计器。|2274053|entityMap^0|1F|1B|0|6|4|B|9|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|R|8|@]|D|@]|E|$]]]|I|$]]

Frankly, your situation is different than mine. In my situation, it was because of Resharper. Maybe this may useful for someone else.
What to do is checking Resharper Options > Enviroment > Performance Guide > Disable XAML Designer.

It must be set to "Ignore" or "Show in Status Bar". Otherwise, it will always disable XAML Designer.

blocks|key|983014|text|确保启用了XAML设计器。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|983015|工具->选项->+XAML设计器->通用->启用XAML设计器|983016|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|$]]

Make sure XAML Designer is enabled.

Tools -> Options -> XAML Designer -> General -> Enable XAML Designer

blocks|key|983077|text|我知道这个问题被标记为WPF，但是对于Xamarin表单，我也有类似的问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|983078|是什么让我解决了这个问题：|983079|右键单击xaml文件|ordered-list-item|983080|选择“打开.”|983081|选择Xamarin.Forms预览器|983082|📷|atomic|offset|length|983083|​|983084|单击OK|983085|还可以将Xamarin.Forms预览器设置为xaml文件的默认设置。|983086|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://developer.qcloudimg.com/http-save/yehe-900000/5f816cadab1369483a20f86c86334402.png|imageAlt^0|0|0|0|0|0|0|1|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|14|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|15|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|16|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|17|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|18|8|@]|9|@]|A|$]]|$1|K|3|L|5|M|7|19|8|@]|9|@$N|1A|O|1B|1|1C]]|A|$]]|$1|P|3|Q|5|6|7|1D|8|@]|9|@]|A|$]]|$1|R|3|S|5|F|7|1E|8|@]|9|@]|A|$]]|$1|T|3|U|5|F|7|1F|8|@]|9|@]|A|$]]|$1|V|3|-4|5|6|7|1G|8|@]|9|@]|A|$]]]|W|$X|$5|Y|Z|10|A|$11|12|13|-4]]]]

I know this issue is tagged as WPF but I had a similar issue for Xamarin Forms.

What solved this issue for me:

<ol>
<li>Right Click the xaml file</li>
<li>Select "Open With..."</li>
<li>Select Xamarin.Forms Previewer <a href="https://i.stack.imgur.com/CQIsA.png" rel="noreferrer"><img src="https://i.stack.imgur.com/CQIsA.png" alt="List item"></a></li>
<li>Click OK</li>
<li>Optionally, you can set the Xamarin.Forms Previewer as the default for xaml files</li>
</ol>

blocks|key|983094|text|我有同样的发现，我发现在VS社区中打开XAML不起作用。但是，如果选择->打开->项目/解决方案并打开相应的sln文件，它就能工作。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|983095|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|$]]

I had the same, I found that opening the XAML in VS community did not work. However, if I choose file -> open -> project/solution and open the corresponding sln file, it works.

Using Visual Studio Professional 2017 (Release 15.2 26430.16), when I open a xaml file for a desktop UI that I have developed, I can no longer see the xaml designer (I only see the raw xaml code). This is new behaviour and may be due to me having a system clean-out, so maybe I removed an SDK that I need or something like that?

Are there any Visual Studio error logs I can check for warnings etc?

<img src="https://i.imgur.com/qHqN2ts.png" alt="XAML Editor">

Visual Studio 2017 xaml designer not available

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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使用2017 (第15.2 26430.16版)，当我为我开发的桌面UI打开xaml文件时，我不能再看到xaml设计器(我只看到原始的xaml代码)。这是一个新的行为，可能是因为我有一个系统清理，所以也许我删除了我需要的SDK或类似的东西？是否有任何Visual错误日志可以检查警告等？​​

问Visual 2017 xaml设计器不可用
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