配置参照DLL文件路径的方法

   众所周知,.NET程序所参照的DLL按照所有的文件路径划分,可分为两类:

• 全局DLL(注册在GAC中)
• 私有DLL(Win程序和exe文件在同一文件夹下,Web程序在顶层web.config同级的Bin文件夹下)

  对于私有的DLL,当其数目众多时,由于没有分类,会显得比较凌乱;如果将其分类,分别放到对应的子目录,则会清爽许多.

  问题是,如何解决应用程序对DLL的查找路径问题呢?答案是在配置文件中添加如下配置项:

<?xml version="1.0" ?>
<configuration
    xmlns:asm="urn:schemas-microsoft-com:asm.v1">
  <runtime>
    <asm:assemblyBinding>
      <asm:probing privatePath="shared;common"  />
    </asm:assemblyBinding>
  </runtime>
</configuration>

  其中privatePath是相对于 config文件的相对路径,多个文件夹以分号(;)分隔.

  举微软的Enterprise Library 4.1作为例子,其默认为:

  调整后为:

 

 

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <runtime>
        <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
            <probing privatePath="Caching;Common;Configuration;Data;ExceptionHandling;Logging;PolicyInjection;Security;Unity;Validation"  />    
            <dependentAssembly>
                <assemblyIdentity name="Microsoft.Data.ConnectionUI"
                    publicKeyToken="b03f5f7f11d50a3a"
                    culture="neutral" />
                <codeBase version="8.0.0.0"
          href="file:///C:/Program%20Files/Microsoft%20Visual%20Studio%208/Common7/IDE/Microsoft.Data.ConnectionUI.dll" />
            </dependentAssembly>
            
            <dependentAssembly>
                <assemblyIdentity name="Microsoft.Data.ConnectionUI.Dialog"
                    publicKeyToken="b03f5f7f11d50a3a"
                    culture="neutral" />
                <codeBase version="8.0.0.0"
          href="file:///C:/Program%20Files/Microsoft%20Visual%20Studio%208/Common7/IDE/Microsoft.Data.ConnectionUI.Dialog.dll" />
            </dependentAssembly>
            
        </assemblyBinding>
    </runtime>
</configuration>

 

  更高级的应用,如版本重定向,请参考:.NET CLR Components—Resolving Names to Locations