使用Nuget 安装指定版本package或者更新package到指定版本
时间：2014-07-29 13:56:18
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最近在琢磨MVC和EntityFramework,使用的VS是2013版的，在Nuget的GUI界面下安装了EntityFramework(默认安装最新版的，怎么安装指定版本还没找到),按照MVC的示例项目MusicStore逐步做的过程中发现MVC4不支持EntityFramwok 6。
尝试去更新MVC版本各种失败，只能试着去降低EntityFramework版本。但是通过Nuget的GUI界面无法安装或更新到指定版本的EntityFramwok。在网上搜了搜相关资料（事实上也很容易搜到），做个备忘。
首先打开程序包管理器控制台：工具→Nuget程序包管理器→程序包管理器控制台
打开如下图所示的命令行界面
安装指定版本的Package(例如：EntityFramework 5.0)：
PM> Install-Package EntityFramework -ProjectName MusicStore -Version 5.0
更新到指定版本的Package(例如EntityFramewrok 6.0):
PM> Update-Package EntityFramework -ProjectName MusicStore -Version 6.0
Update-Package命令相关参数说明：
| Parameter | Type | Description |
|---|---|---|
| -Id | string | Specifies the Id of the package to be updated. |
| -ProjectName | string | Specifies the name of the project in which packages should be updated. |
| -Version | SemanticVersion* | Specifies the new target version of the package as a result of the update. |
| -Source | string | Specifies where to look for package updates, overriding the package sources that are specified in the Options dialog. This value can be either a url to a remote repository or a path to a local repository or the name of a package source specified in the Options dialog. |
| -IgnoreDependencies | Switch parameter | If set, NuGet will ignore dependency packages and only update the main package. |
| -Safe | Switch parameter | If set, NuGet will only update to a new version that has the same major and minor versions as the previous package. For example, if the old version is 1.2.0, NuGet will accept the update package with version of 1.2.1 or 1.2.9999 but it will not accept 1.3.0. |
| -IncludePrerelease | Switch parameter | If set, NuGet will consider prerelease packages as candidates for updates. |
| -Reinstall | Switch parameter | If set, instead of updating the package to the latest version, NuGet will uninstall the package and reinstall the same version. This is useful when, for example, you‘ve updated the target framework of your project, e.g. from .NET 4.0 to .NET 4.5, and you want to reference .NET 4.5-specific assemblies in the package. You can‘t set this parameter together with the -Version parameter. |
参考资料：http://docs.nuget.org/docs/reference/package-manager-console-powershell-reference
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