Web.config 转换变量
是否可以在 web.config 转换文件中包含变量？对于每个环境，我都有基本相同的变换，只是具有不同的值。例如，对于开发环境，我会...
<?xml version="1.0"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<appSettings>
<add key="serverName" value="server1" xdt:Transform="Replace" xdt:Locator="Match(key)" />
<add key="serverPath" value="\\server1" xdt:Transform="Replace" xdt:Locator="Match(key)" />
</appSettings>
</configuration>
对于 QA 环境，我会...
<?xml version="1.0"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<appSettings>
<add key="serverName" value="server2" xdt:Transform="Replace" xdt:Locator="Match(key)" />
<add key="serverPath" value="\\server2" xdt:Transform="Replace" xdt:Locator="Match(key)" />
</appSettings>
</configuration>
唯一的区别是 server1 与 server2 的值。这是一个简单的示例，实际上，我在转换中多次使用服务器值。有什么方法可以在转换文件中声明一个变量以供多次使用吗？像...
<?xml version="1.0"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<property name="server" value="server2" />
<appSettings>
<add key="serverName" value="${server}" xdt:Transform="Replace" xdt:Locator="Match(key)" />
<add key="serverPath" value="\\${server}" xdt:Transform="Replace" xdt:Locator="Match(key)" />
</appSettings>
</configuration>
Is it possible to include variables in a web.config transform file? For each environment, I have basically the same transform, just with different values. For example, for the development environment, I'd have...
<?xml version="1.0"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<appSettings>
<add key="serverName" value="server1" xdt:Transform="Replace" xdt:Locator="Match(key)" />
<add key="serverPath" value="\\server1" xdt:Transform="Replace" xdt:Locator="Match(key)" />
</appSettings>
</configuration>
And for the QA environment, I'd have...
<?xml version="1.0"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<appSettings>
<add key="serverName" value="server2" xdt:Transform="Replace" xdt:Locator="Match(key)" />
<add key="serverPath" value="\\server2" xdt:Transform="Replace" xdt:Locator="Match(key)" />
</appSettings>
</configuration>
The only difference is the value for server1 vs server2. This is a simple example, and in reality, I use the server value multiple times in the transform. Is there any way to declare a variable in the transform file to be used multiple times? Something like...
<?xml version="1.0"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
<property name="server" value="server2" />
<appSettings>
<add key="serverName" value="${server}" xdt:Transform="Replace" xdt:Locator="Match(key)" />
<add key="serverPath" value="\\${server}" xdt:Transform="Replace" xdt:Locator="Match(key)" />
</appSettings>
</configuration>
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web.config 转换不支持此功能。您可以看一下的一件事是创建一个 T4 模板可用于生成 web.config 转换。因此，我们的想法是将变量放置在 T4 模板中，它会输出 web.debug.config/web.release.config/etc。然后，当您打包/发布时，它只会获取作为 T4 输出生成的转换文件。
如果您能提供一些有用的具体示例，我不介意帮助您解决此类问题。
this is not supported with web.config transformations. One thing that you could take a look at is creating a T4 Template which can be used to generate your web.config transformations. So the idea being that you place the variables in the T4 template, and it will spit out the web.debug.config/web.release.config/etc. Then when you package/publish it will just pick up the transform file which was produced as the T4 output.
I wouldn't mind helping you with such a thing if you can provide some concrete examples of this being useful.
几个月前我做了类似的事情。示例位于 http： //www.geoffhudik.com/tech/2010/10/19/webconfig-automation-with-t4-and-a-macro.html
I did something similar to this a few months ago. Example is at http://www.geoffhudik.com/tech/2010/10/19/webconfig-automation-with-t4-and-a-macro.html