业务场景:在做一个打包程序中,需要引用到一个ICSharpCode.SharpZipLib.dll的第三方库,编译之后dll需要生成到目录里面exe才能使用,但是只想给用户发送一个纯exe的安装文件,不想有关联的引用,怎么办呢?提供一种方法:
1、将dll文件包含到项目中,再进行引用
2、在程序入口添加程序集解析事件(wpf的App.xaml.cs文件)
protected override void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);
//添加程序集解析事件
AppDomain.CurrentDomain.AssemblyResolve += OnResolveAssembly;
}
private static Assembly OnResolveAssembly(object sender, ResolveEventArgs args)
{
Assembly executingAssembly = Assembly.GetExecutingAssembly();
var executingAssemblyName = executingAssembly.GetName();
var resName = executingAssemblyName.Name + ".resources";
AssemblyName assemblyName = new AssemblyName(args.Name); string path = "";
if (resName == assemblyName.Name)
{
path = executingAssemblyName.Name + ".g.resources"; ;
}
else
{
path = assemblyName.Name + ".dll";
if (assemblyName.CultureInfo != null && assemblyName.CultureInfo.Equals(CultureInfo.InvariantCulture) == false)
{
path = String.Format(@"{0}\{1}", assemblyName.CultureInfo, path);
}
}
using (Stream stream = executingAssembly.GetManifestResourceStream(path))
{
if (stream == null)
return null;
byte[] assemblyRawBytes = new byte[stream.Length];
stream.Read(assemblyRawBytes, 0, assemblyRawBytes.Length);
return Assembly.Load(assemblyRawBytes);
}
}
原理:就是将dll文件以资源的方式嵌入包含到项目中,编译后目录里面仍然会编译出dll,我们将dll删除,发现程序仍然能运行,这是因为我们在入口注册了程序集解析事件
当程序集解析引用异常或有相关错误时,会进入事件,在事件中我们将嵌入的dll文件以流的方式映射加载,就相当于重新加载了删除的dll文件
网上好像还有别的方法如引用第三方库Fody.Costura(未测)