blocks|key|1018918|text|您可以使用宏来完成此操作，或者记住，VS项目文件是文本文件，这意味着简单的全局搜索和替换可以实现相同的效果，并且是对许多项目文件进行相同更改的一种更通用的技术。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1018919|首先备份现有的项目文件，然后进行所需的更改(例如，更改目标框架)。使用WinDiff或WinMerge将新项目文件与备份文件进行比较。这将告诉您需要进行的更改。然后使用Visual+Studio+IDE的在文件中查找和替换功能对所有项目文件进行更改。|offset|length|1018920|entityMap|0|LINK|mutability|MUTABLE|url|http://winmerge.org/^0|0|17|8|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

You can use a macro to do this, or remember that the VS project files are text files, which means a simple global search and replace can achieve the same, and is a more general technique for making the same change to lots of project files. 

First back up an existing project file, then make the change you want (e.g., change the target framework). Use WinDiff or <a href="http://winmerge.org/" rel="nofollow noreferrer">WinMerge</a> to compare the new project file with the back up. This will tell you the change you need to make. Then use the Visual Studio IDE's Find and Replace in Files function to make the change to all your project files.

blocks|key|1233667|text|Conditional+regexes让我头疼。所以这里有一个搜索/替换的编码解决方案(我尽量避免使用EnvDTE+)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1233668|项目文件条目的Order+does+not+seem+to+matter：|1233669|试着做一些类似的事情：|1233670|using+System;
using+System.Collections.Generic;
using+System.Linq;
using+System.Text;
using+System.IO;
using+System.Text.RegularExpressions;

namespace+TextReplaceDemo
{
++++class+Program
++++{
++++++++static+void+Main(string[]+args)
++++++++{
++++++++++++try
++++++++++++{
++++++++++++++++ReplaceTargetFrameworkVersion("v4.0",+"c:/projekt/2005",+"*.csproj");
++++++++++++}
++++++++++++catch+(Exception+ex)
++++++++++++{
++++++++++++++++Console.WriteLine(ex.Message);
++++++++++++}
++++++++}

++++++++///+<summary>
++++++++///+Inserts+the+denoted+targetFramework+into+all+occurrences+of+TargetFrameworkVersion.
++++++++///+If+the+TargetFrameworkVersion+is+not+present+in+the+file,+the+method+searches+for+the+
++++++++///+OutputType+tag,+which+should+be+present,+and+inserts+the+TargetFrameworkVersion+before+that.
++++++++///+</summary>
++++++++///+<param+name="targetFramework">New+target+framework+(e.g.+"v4.0")</param>
++++++++///+<param+name="rootDirectory">Root+directory+for+the+file+search+(e.g.+"c:\Projects\2005")</param>
++++++++///+<param+name="fileSearchPattern">Pattern+to+find+the+project+files+(e.g.+"*.csproj).+
++++++++///+Will+get+all+files+for+empty+parameter.</param>
++++++++public+static+void+ReplaceTargetFrameworkVersion(string+targetFramework,+string+rootDirectory,+string+fileSearchPattern)
++++++++{
++++++++++++if+(string.IsNullOrEmpty(targetFramework))+throw+new+ArgumentNullException("targetFramework");
++++++++++++if+(string.IsNullOrEmpty(rootDirectory))+throw+new+ArgumentNullException("rootDirectory");
++++++++++++if+(string.IsNullOrEmpty(fileSearchPattern))+fileSearchPattern+=+"*.*";

++++++++++++string+regexPattern+=+"<TargetFrameworkVersion>.*</TargetFrameworkVersion>";
++++++++++++string+insertText+=+string.Format("<TargetFrameworkVersion>{0}</TargetFrameworkVersion>",+targetFramework);
++++++++++++string+alternativeMarker+=+"<OutputType>";

++++++++++++//+get+all+files
++++++++++++List<FileInfo>+files+=+GetAllFiles(rootDirectory,+fileSearchPattern);

++++++++++++//+iterate+over+found+files
++++++++++++foreach+(var+file+in+files)
++++++++++++{
++++++++++++++++string+fileContent+=+File.ReadAllText(file.FullName);
++++++++++++++++Match+match+=+Regex.Match(fileContent,+regexPattern);
++++++++++++++++string+newfileContent+=+null;
++++++++++++++++if+(match.Success)
++++++++++++++++{
++++++++++++++++++++//+replace+<TargetFrameworkVersion>
++++++++++++++++++++newfileContent+=+fileContent.Replace(match.Value,+insertText);
++++++++++++++++}
++++++++++++++++else+if+(fileContent.Contains(alternativeMarker))
++++++++++++++++{
++++++++++++++++++++//+create+<TargetFrameworkVersion>
++++++++++++++++++++newfileContent+=+fileContent.Replace(alternativeMarker,
++++++++++++++++++++++++insertText+%2B+Environment.NewLine+%2B+"++++"+%2B+alternativeMarker);
++++++++++++++++}

++++++++++++++++//+overwrite+file
++++++++++++++++if+(newfileContent+!=+null)
++++++++++++++++++++File.WriteAllText(file.FullName,+newfileContent);
++++++++++++}
++++++++}


++++++++///+<summary>
++++++++///+Recursive+function+to+find+all+files+in+a+directory+by+a+searchPattern
++++++++///+</summary>
++++++++///+<param+name="path">Path+to+the+root+directory</param>
++++++++///+<param+name="searchPattern">Pattern+for+the+file+search,+e.g.+"*.txt"</param>
++++++++public+static+List<FileInfo>+GetAllFiles(string+path,+string+searchPattern)
++++++++{
++++++++++++List<FileInfo>+files+=+new+List<FileInfo>();

++++++++++++DirectoryInfo+dir+=+new+DirectoryInfo(path);

++++++++++++if+(dir.Exists)
++++++++++++{
++++++++++++++++//+get+all+files+in+directory
++++++++++++++++files.AddRange(dir.GetFiles(searchPattern));

++++++++++++++++//+get+all+files+of+subdirectories
++++++++++++++++foreach+(var+subDir+in+dir.GetDirectories())
++++++++++++++++{
++++++++++++++++++++files.AddRange(GetAllFiles(subDir.FullName,+searchPattern));
++++++++++++++++}
++++++++++++}
++++++++++++return+files;
++++++++}
++++}
}|code-block|syntax|javascript|1233671|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/6804586/how-to-conditional-regex|1|https://stackoverflow.com/questions/11810294/does-the-order-of-items-in-a-csproj-file-matter^0|0|J|0|0|7|T|1|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|F|3|G|5|6|7|14|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|15|8|@]|9|@]|C|$K|L]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

<a href="https://stackoverflow.com/questions/6804586/how-to-conditional-regex">Conditional regexes</a> are giving me a headache. So here is a coded solution for search/replace (I'm avoiding EnvDTE as long as possible). 

<a href="https://stackoverflow.com/questions/11810294/does-the-order-of-items-in-a-csproj-file-matter">Order does not seem to matter</a> for the project file entries:

Try something along those lines:

<pre><code>using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;

namespace TextReplaceDemo
{
 class Program
 {
 static void Main(string[] args)
 {
 try
 {
 ReplaceTargetFrameworkVersion("v4.0", "c:/projekt/2005", "*.csproj");
 }
 catch (Exception ex)
 {
 Console.WriteLine(ex.Message);
 }
 }

 /// &lt;summary&gt;
 /// Inserts the denoted targetFramework into all occurrences of TargetFrameworkVersion.
 /// If the TargetFrameworkVersion is not present in the file, the method searches for the 
 /// OutputType tag, which should be present, and inserts the TargetFrameworkVersion before that.
 /// &lt;/summary&gt;
 /// &lt;param name="targetFramework"&gt;New target framework (e.g. "v4.0")&lt;/param&gt;
 /// &lt;param name="rootDirectory"&gt;Root directory for the file search (e.g. "c:\Projects\2005")&lt;/param&gt;
 /// &lt;param name="fileSearchPattern"&gt;Pattern to find the project files (e.g. "*.csproj). 
 /// Will get all files for empty parameter.&lt;/param&gt;
 public static void ReplaceTargetFrameworkVersion(string targetFramework, string rootDirectory, string fileSearchPattern)
 {
 if (string.IsNullOrEmpty(targetFramework)) throw new ArgumentNullException("targetFramework");
 if (string.IsNullOrEmpty(rootDirectory)) throw new ArgumentNullException("rootDirectory");
 if (string.IsNullOrEmpty(fileSearchPattern)) fileSearchPattern = "*.*";

 string regexPattern = "&lt;TargetFrameworkVersion&gt;.*&lt;/TargetFrameworkVersion&gt;";
 string insertText = string.Format("&lt;TargetFrameworkVersion&gt;{0}&lt;/TargetFrameworkVersion&gt;", targetFramework);
 string alternativeMarker = "&lt;OutputType&gt;";

 // get all files
 List&lt;FileInfo&gt; files = GetAllFiles(rootDirectory, fileSearchPattern);

 // iterate over found files
 foreach (var file in files)
 {
 string fileContent = File.ReadAllText(file.FullName);
 Match match = Regex.Match(fileContent, regexPattern);
 string newfileContent = null;
 if (match.Success)
 {
 // replace &lt;TargetFrameworkVersion&gt;
 newfileContent = fileContent.Replace(match.Value, insertText);
 }
 else if (fileContent.Contains(alternativeMarker))
 {
 // create &lt;TargetFrameworkVersion&gt;
 newfileContent = fileContent.Replace(alternativeMarker,
 insertText + Environment.NewLine + " " + alternativeMarker);
 }

 // overwrite file
 if (newfileContent != null)
 File.WriteAllText(file.FullName, newfileContent);
 }
 }


 /// &lt;summary&gt;
 /// Recursive function to find all files in a directory by a searchPattern
 /// &lt;/summary&gt;
 /// &lt;param name="path"&gt;Path to the root directory&lt;/param&gt;
 /// &lt;param name="searchPattern"&gt;Pattern for the file search, e.g. "*.txt"&lt;/param&gt;
 public static List&lt;FileInfo&gt; GetAllFiles(string path, string searchPattern)
 {
 List&lt;FileInfo&gt; files = new List&lt;FileInfo&gt;();

 DirectoryInfo dir = new DirectoryInfo(path);

 if (dir.Exists)
 {
 // get all files in directory
 files.AddRange(dir.GetFiles(searchPattern));

 // get all files of subdirectories
 foreach (var subDir in dir.GetDirectories())
 {
 files.AddRange(GetAllFiles(subDir.FullName, searchPattern));
 }
 }
 return files;
 }
 }
}
</code></pre>

blocks|key|1019007|text|一个PowerShell脚本，我用它来做我的。诚然，布鲁斯有暴力倾向。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1019008|Get-ChildItem+.+-Recurse+-Filter+*.*proj+%7CForEach+{
++++$content+=+Get-Content+$_.FullName
++++$content+%7CForEach+{
++++++++$_.Replace("<TargetFrameworkVersion>v4.0</TargetFrameworkVersion>",+"<TargetFrameworkVersion>v4.5</TargetFrameworkVersion>")
++++}+%7CSet-Content+$_.FullName
}|code-block|syntax|javascript|1019009|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

A PowerShell script that I used to do mine. Admittedly bruce force-ish.

<pre><code>Get-ChildItem . -Recurse -Filter *.*proj |ForEach {
 $content = Get-Content $_.FullName
 $content |ForEach {
 $_.Replace("&lt;TargetFrameworkVersion&gt;v4.0&lt;/TargetFrameworkVersion&gt;", "&lt;TargetFrameworkVersion&gt;v4.5&lt;/TargetFrameworkVersion&gt;")
 } |Set-Content $_.FullName
}
</code></pre>

blocks|key|1233753|text|刚刚发布的Target+Framework+Migrator，用于一次更改多个.Net项目目标框架的Visual+Studio扩展|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1233754|entityMap|0|LINK|mutability|MUTABLE|url|http://visualstudiogallery.msdn.microsoft.com/47bded90-80d8-42af-bc35-4736fdd8cd13^0|5|P|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]]]]

Just published <a href="http://visualstudiogallery.msdn.microsoft.com/47bded90-80d8-42af-bc35-4736fdd8cd13">Target Framework Migrator</a>, Visual Studio Extension for changing multiple .Net projects Target Framework at once

blocks|key|1019073|text|目标框架迁移程序，作者:+Pavel+Samokha+(VHQLabs)|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1019074|http://visualstudiogallery.msdn.microsoft.com/47bded90-80d8-42af-bc35-4736fdd8cd13|offset|length|1019075|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|2A|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@$D|O|E|P|1|Q]]|A|$]]|$1|F|3|-4|5|6|7|R|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|C]]]]

Target Framework Migrator by Pavel Samokha (VHQLabs)

<a href="http://visualstudiogallery.msdn.microsoft.com/47bded90-80d8-42af-bc35-4736fdd8cd13" rel="noreferrer">http://visualstudiogallery.msdn.microsoft.com/47bded90-80d8-42af-bc35-4736fdd8cd13</a>

blocks|key|1019105|text|总会有简单的事情。一个像样的文本编辑器，如notepad%2B%2B，将包含一个在文件中查找/替换的功能。只需在csproj/vbproj文件中搜索当前版本字符串：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1019106|<TargetFrameworkVersion>v3.5</TargetFrameworkVersion>|code-block|syntax|javascript|1019107|并替换为新版本|1019108|<TargetFrameworkVersion>v4.5</TargetFrameworkVersion>|1019109|不过，先结账是个好主意……|1019110|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

There's always the simple. A decent text editor such as notepad++ will include a find/replace in files function. Just search for the current version string in your csproj/vbproj files:

<pre><code>&lt;TargetFrameworkVersion&gt;v3.5&lt;/TargetFrameworkVersion&gt;
</code></pre>

and replace with the new version

<pre><code>&lt;TargetFrameworkVersion&gt;v4.5&lt;/TargetFrameworkVersion&gt;
</code></pre>

Good idea to check out first though...

blocks|key|1019127|text|来自bash：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1019128|$find+.+-name+"*.csproj"+-exec+sed+-b+-i+"s,<TargetFrameworkVersion>[%5E<]*</TargetFrameworkVersion>,<TargetFrameworkVersion>v4.6.1</TargetFrameworkVersion>,"+{}+\;|code-block|syntax|javascript|1019129|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

From bash:

<pre><code>$find . -name "*.csproj" -exec sed -b -i "s,&lt;TargetFrameworkVersion&gt;[^&lt;]*&lt;/TargetFrameworkVersion&gt;,&lt;TargetFrameworkVersion&gt;v4.6.1&lt;/TargetFrameworkVersion&gt;," {} \;
</code></pre>

I need to change the target framework for all projects. I have many solutions with hundreds of projects. 

Anything new here or do I have to change every single project?

Change the Target Framework for all my projects in a Visual Studio Solution

Visual Studio

我需要更改所有项目的目标框架。我有数百个项目的许多解决方案。这里有什么新的东西吗?或者我必须改变每一个项目？

问更改Visual Studio解决方案中所有项目的目标框架
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