Publish is not transforming web.config?

问题

I made a web.config (full file, it doesn't show XML errors)

<?xml version="1.0"?>
<configuration xmlns="http://schemas.microsoft.com/.NetConfiguration/v2.0">
  <configSections>
      ...
      <location path="." inheritInChildApplications="false">
        <connectionStrings>
          <add name="ElmahLog" connectionString="data source=~/App_Data/Error.db" />
          <add name="database" connectionString="w" providerName="System.Data.EntityClient"/>
        </connectionStrings>
      </location>
  ...

with a transform file (web.Staging.config)

<?xml version="1.0"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
  <connectionStrings>
    <add name="database"
      connectionString="c"
      providerName="System.Data.EntityClient"
      xdt:Transform="SetAttributes" xdt:Locator="Match(name)" />
  </connectionStrings>
  <system.web>
    <compilation xdt:Transform="RemoveAttributes(debug)" />
    <customErrors defaultRedirect="error.aspx"
      mode="RemoteOnly" xdt:Transform="Replace">
    </customErrors>
  </system.web>
</configuration>

I am publishing in Staging mode (right click website > Publish > Method: File System ...)

------ Build started: Project: Drawing, Configuration: Staging Any CPU ------
  Drawing -> D:\Project\bin\Staging\Drawing.dll
------ Build started: Project: MySystem, Configuration: Staging Any CPU ------
  MySystem -> D:\Project\bin\Staging\MySystem.dll
...

But when I look at the web.config in the output folder it isn't changed.

I found the following on the Build log:

D:\Project\Web.Staging.config(3,2): Warning : No element in the source document matches '/configuration'
D:\Project\Web.Staging.config(3,2): Warning : No element in the source document matches '/configuration'
D:\Project\Web.Staging.config(3,2): Warning : No element in the source document matches '/configuration'
Transformed web.config using Web.Staging.config into obj\Staging\TransformWebConfig\transformed\web.config.

What could be the problem? Am I doing this right?

回答1:

Answering late but perhaps I can save someone a headache. In Visual Studio 2013, there are two places to select configuration for your build and deploy. The Configuration Manager and then again with Publish Web where the third step in the Wizard entitled Settings allows you to select Config you want to use. If you don't select your new configuration it will use the transform for the selected configuration instead of yours.

回答2:

I found out two things:

• You cannot set a namespace on the <configuration> tag (ex: for <location path="." inheritInChildApplications="false">)
• You have to watch for the correct hierarchy in the transform file.

Like

<configuration>
  <location>
    <connectionStrings>

Instead of

<configuration>
  <connectionStrings>

回答3:

Ensure that in the properties of the Web.Config file Build Action is set to Content.

If the build action is set to None, it will not be transformed, even if it is being copied to the output directory.

回答4:

Don't forget to copy all the other attributes of "configuration" from the original "web.config", as it seems that VS2012 doesn't do it automatically and of course there will be no match...

回答5:

Answering late as well, but this may help someone.

I realized that if you have two websites in the same solution, when you try to publish one of them the transformation might not work if you have one only configuration for both projects.

One of my websites was always transforming, but the other sometimes was and sometimes wasn't.

For example, I had the configuration "Auto" in the solution, and had web.Auto.config for both websites.

I resolved that by creating a new configuration with a different name - "AutoAdmin" - creating also its web.AutoAdmin.config file for the second project, and when I published it again the transformation finally occurred.

回答6:

I followed the below steps to fix this issue. Thanks, @michaelhawkins for pointing in the right direction. You need to make sure you change the configuration to release in two places.

And right click on your project and select "Properties". IF not working try selecting x86 in CPU Architecture

回答7:

Make sure to include InsertIfMissing if the section you are trying to add does not already appear in the output.

<?xml version="1.0"?>
<configuration xmlns:xdt="http://schemas.microsoft.com/XML-Document-Transform">
  <location>
    <system.webServer>

      <security xdt:Transform="InsertIfMissing">
        <requestFiltering allowDoubleEscaping="true" />
      </security>

    </system.webServer>
  </location>
</configuration>

来源：https://stackoverflow.com/questions/5434102/publish-is-not-transforming-web-config