以编程方式获取DLL的版本号

Question

是否可以从任何.NET DLL以编程方式获取版本号？

如果有,怎么样？

Answer 1

如果dll是.net或Win32,则此方法有效.只有当dll是.net时,反射方法才有效.此外,如果使用反射,则需要将整个dll加载到内存中.以下方法不会将程序集加载到内存中.

// Get the file version for the notepad.
FileVersionInfo myFileVersionInfo = FileVersionInfo.GetVersionInfo(@"C:\MyAssembly.dll");

// Print the file name and version number.
Console.WriteLine("File: " + myFileVersionInfo.FileDescription + '\n' +
                  "Version number: " + myFileVersionInfo.FileVersion);

来自:http://msdn.microsoft.com/en-us/library/system.diagnostics.fileversioninfo.fileversion.aspx

原始来源

Answer 2

Assembly assembly = Assembly.LoadFrom("MyAssembly.dll");
Version ver = assembly.GetName().Version;

重要提示: 应该注意的是,这不是原始问题的最佳答案.不要忘记在此页面上阅读更多内容.

Answer 3

首先,您可能感兴趣的有两个可能的"版本":

• Windows文件系统文件版本,适用于所有可执行文件

• 程序集构建版本,由编译器嵌入.NET程序集中(显然只适用于.NET程序集dll和exe文件)

在前一种情况下,你应该使用Ben Anderson的答案; 在后一种情况下,使用AssemblyName.GetAssemblyName(@"c:\path\to\file.dll").Version或Tataro的答案,以防您的代码引用程序集.

请注意,您可以忽略使用.Load()/ .LoadFrom()methods的所有答案,因为这些答案实际上会在当前AppDomain中加载程序集 - 这类似于剪切树以查看它的年龄.

Answer 4

这是使用一些反射来获取包含特定类的DLL版本的好方法:

var ver = System.Reflection.Assembly.GetAssembly(typeof(!Class!)).GetName().Version;

只需更换!Class!与您希望获得的版本的DLL中定义的类的名称.

这是我首选的方法,因为如果我为不同的部署移动DLL,我不必更改文件路径.

Answer 5

为启动的程序集(winform,console app等)获取它...

using System.Reflection;
...
Assembly.GetEntryAssembly().GetName().Version

Answer 6

Kris,你的版本在需要从实际的DLL文件中加载程序集时很有用(如果DLL在那里!),但是,如果DLL是EMBEDDED(即,不是文件而是嵌入式文件),则会出现非常多的错误DLL).

另一件事是,如果使用类似" 1.2012.0508.0101 "之类的版本控制方案,当获得版本字符串时,您实际上会得到" 1.2012.518.101 "; 注意缺少的零.

所以,这里有一些额外的函数来获取DLL的版本(嵌入式或DLL文件):

    public static System.Reflection.Assembly GetAssembly(string pAssemblyName)
    {
        System.Reflection.Assembly tMyAssembly = null;

        if (string.IsNullOrEmpty(pAssemblyName)) { return tMyAssembly; }
        tMyAssembly = GetAssemblyEmbedded(pAssemblyName);
        if (tMyAssembly == null) { GetAssemblyDLL(pAssemblyName); }

        return tMyAssembly;
    }//System.Reflection.Assembly GetAssemblyEmbedded(string pAssemblyDisplayName)


    public static System.Reflection.Assembly GetAssemblyEmbedded(string pAssemblyDisplayName)
    {
        System.Reflection.Assembly tMyAssembly = null;

        if(string.IsNullOrEmpty(pAssemblyDisplayName)) { return tMyAssembly; }
        try //try #a
        {
            tMyAssembly = System.Reflection.Assembly.Load(pAssemblyDisplayName);
        }// try #a
        catch (Exception ex)
        {
            string m = ex.Message;
        }// try #a
        return tMyAssembly;
    }//System.Reflection.Assembly GetAssemblyEmbedded(string pAssemblyDisplayName)


    public static System.Reflection.Assembly GetAssemblyDLL(string pAssemblyNameDLL)
    {
        System.Reflection.Assembly tMyAssembly = null;

        if (string.IsNullOrEmpty(pAssemblyNameDLL)) { return tMyAssembly; }
        try //try #a
        {
            if (!pAssemblyNameDLL.ToLower().EndsWith(".dll")) { pAssemblyNameDLL += ".dll"; }
            tMyAssembly = System.Reflection.Assembly.LoadFrom(pAssemblyNameDLL);
        }// try #a
        catch (Exception ex)
        {
            string m = ex.Message;
        }// try #a
        return tMyAssembly;
    }//System.Reflection.Assembly GetAssemblyFile(string pAssemblyNameDLL)


    public static string GetVersionStringFromAssembly(string pAssemblyDisplayName)
    {
        string tVersion = "Unknown";
        System.Reflection.Assembly tMyAssembly = null;

        tMyAssembly = GetAssembly(pAssemblyDisplayName);
        if (tMyAssembly == null) { return tVersion; }
        tVersion = GetVersionString(tMyAssembly.GetName().Version.ToString());
        return tVersion;
    }//string GetVersionStringFromAssemblyEmbedded(string pAssemblyDisplayName)


    public static string GetVersionString(Version pVersion)
    {
        string tVersion = "Unknown";
        if (pVersion == null) { return tVersion; }
        tVersion = GetVersionString(pVersion.ToString());
        return tVersion;
    }//string GetVersionString(Version pVersion)


    public static string GetVersionString(string pVersionString)
    {
        string tVersion = "Unknown";
        string[] aVersion;

        if (string.IsNullOrEmpty(pVersionString)) { return tVersion; }
        aVersion = pVersionString.Split('.');
        if (aVersion.Length > 0) { tVersion = aVersion[0]; }
        if (aVersion.Length > 1) { tVersion += "." + aVersion[1]; }
        if (aVersion.Length > 2) { tVersion += "." + aVersion[2].PadLeft(4, '0'); }
        if (aVersion.Length > 3) { tVersion += "." + aVersion[3].PadLeft(4, '0'); }

        return tVersion;
    }//string GetVersionString(Version pVersion)


    public static string GetVersionStringFromAssemblyEmbedded(string pAssemblyDisplayName)
    {
        string tVersion = "Unknown";
        System.Reflection.Assembly tMyAssembly = null;

        tMyAssembly = GetAssemblyEmbedded(pAssemblyDisplayName);
        if (tMyAssembly == null) { return tVersion; }
        tVersion = GetVersionString(tMyAssembly.GetName().Version.ToString());
        return tVersion;
    }//string GetVersionStringFromAssemblyEmbedded(string pAssemblyDisplayName)


    public static string GetVersionStringFromAssemblyDLL(string pAssemblyDisplayName)
    {
        string tVersion = "Unknown";
        System.Reflection.Assembly tMyAssembly = null;

        tMyAssembly = GetAssemblyDLL(pAssemblyDisplayName);
        if (tMyAssembly == null) { return tVersion; }
        tVersion = GetVersionString(tMyAssembly.GetName().Version.ToString());
        return tVersion;
    }//string GetVersionStringFromAssemblyEmbedded(string pAssemblyDisplayName)