有時爲了方便起見,我們想將一個調用了外部dll庫的exe程序能夠獨立運行,那我們該如何處理呢?下面是我個人在工作中遇到的一個類似的例子:
意圖:
想將項目用到的兩個dll庫文件(CryptEnDe.dll和ICSharpCode.SharpZipLib.dll)一同編譯進exe中,並編譯後僅一個exe程序就可以獨立運行不再需要其它文件。
實現:
1、將兩個dll庫文件作爲資源文件添加進項目中;
2、添加功能代碼
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Reflection;
using System.IO;
namespace AutoUpdateServer.Core
{
/// <summary> 載入資源中的動態鏈接庫(dll)文件
/// </summary>
static class LoadResourceDll
{
static Dictionary<string, Assembly> Dlls = new Dictionary<string, Assembly>();
static Dictionary<string, object> Assemblies = new Dictionary<string, object>();
static Assembly AssemblyResolve(object sender, ResolveEventArgs args)
{
//程序集
Assembly ass;
//獲取加載失敗的程序集的全名
var assName = new AssemblyName(args.Name).FullName;
//判斷Dlls集合中是否有已加載的同名程序集
if (Dlls.TryGetValue(assName, out ass) && ass != null)
{
Dlls[assName] = null;//如果有則置空並返回
return ass;
}
else
{
throw new DllNotFoundException(assName);//否則拋出加載失敗的異常
}
}
/// <summary> 註冊資源中的dll
/// </summary>
public static void RegistDLL()
{
//獲取調用者的程序集
var ass = new StackTrace(0).GetFrame(1).GetMethod().Module.Assembly;
//判斷程序集是否已經處理
if (Assemblies.ContainsKey(ass.FullName))
{
return;
}
//程序集加入已處理集合
Assemblies.Add(ass.FullName, null);
//綁定程序集加載失敗事件(這裏我測試了,就算重複綁也是沒關係的)
AppDomain.CurrentDomain.AssemblyResolve += AssemblyResolve;
//獲取所有資源文件文件名
var res = ass.GetManifestResourceNames();
foreach (var r in res)
{
//如果是dll,則加載
if (r.EndsWith(".dll", StringComparison.OrdinalIgnoreCase))
{
try
{
if (r.Contains("CryptEnDe.dll")
|| r.Contains("CryptEnDe_d.dll"))
{
ExtractResourceToFile(r, PathUtils.GetUpdateDllPath() + @"/" + r.Substring(r.IndexOf('.') + 1));
}
var s = ass.GetManifestResourceStream(r);
var bts = new byte[s.Length];
s.Read(bts, 0, (int)s.Length);
var da = Assembly.Load(bts);
//判斷是否已經加載
if (Dlls.ContainsKey(da.FullName))
{
continue;
}
Dlls[da.FullName] = da;
}
catch(Exception e)
{
//加載失敗就算了...
}
}
}
}
private static void ExtractResourceToFile(string resourceName, string filename)
{
//if (!System.IO.File.Exists(filename))
{
using (System.IO.Stream s = System.Reflection.Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName))
{
using (System.IO.FileStream fs = new System.IO.FileStream(filename, System.IO.FileMode.Create, FileAccess.ReadWrite, FileShare.ReadWrite))
{
byte[] b = new byte[s.Length];
s.Read(b, 0, b.Length);
fs.Write(b, 0, b.Length);
}
}
}
}
}
}
其中PathUtils.GetUpdateDllPath()函數爲獲取dll釋放的路徑,根據自己需要指定路徑
public static string GetUpdateDllPath()
{
string strPath = @"C:/LTShiyi/cache/updatedll";
if (!Directory.Exists(strPath))
{
Directory.CreateDirectory(strPath);
}
return strPath;
}
3、在程序入口Program類中調用上面的接口函數
static Program()
{
AutoUpdateServer.Core.LoadResourceDll.RegistDLL();
}
4、編譯即可。