在 C# 代码中增加版本号

Posted 2023-02-19

【中文标题】在 C# 代码中增加版本号

【英文标题】：Increment Version Number in C# Code

【发布时间】：2014-11-16 02:02:30

【问题描述】：

我正在数据库中维护文档版本。假设我想更新或增加版本号。我试过了，但它显示属性是只读的？

string _versionDB = "1.0.0.0"

var version = new Version(_versionDB);
version.MajorRevision = version.Minor + 1; //error it says read only

谁能详细说明增加版本号的正确方法？

【问题讨论】：

因为System.Version 的属性是只读的。为什么你不能只实现你自己的功能来分配价值

请你在这里放一些示例代码我怎样才能实现我自己的功能？

这取决于您想要的格式。最简单的是将值存储为 int，然后递增它。如果您真的想要上面显示的内容，那么您需要拆分字符串，将值转换为数字，增加一个或多个，然后将它们连接回字符串

【参考方案1】：

您可以创建一个扩展方法来为您执行添加。仍然需要自定义代码；但是，如果您在很多地方都这样做，那么使用这种辅助方法可能会很有用。以下是一些可能会有所帮助的此类功能。

public static class VersionExtension 

    public static Version IncrementRevision(this Version version) 
        return AddVersion(version, 0, 0, 0, 1);
    
    public static Version IncrementBuild(this Version version) 
        return IncrementBuild(version, true);
    
    public static Version IncrementBuild(this Version version, bool resetLowerNumbers) 
        return AddVersion(version, 0, 0, 1, resetLowerNumbers ? -version.Revision : 0);
    
    public static Version IncrementMinor(this Version version) 
        return IncrementMinor(version, true);
    
    public static Version IncrementMinor(this Version version, bool resetLowerNumbers) 
        return AddVersion(version, 0, 1, resetLowerNumbers ? -version.Build : 0, resetLowerNumbers ? -version.Revision : 0);
    
    public static Version IncrementMajor(this Version version) 
        return IncrementMajor(version, true);
    
    public static Version IncrementMajor(this Version version, bool resetLowerNumbers) 
        return AddVersion(version, 1, resetLowerNumbers ? -version.Minor : 0, resetLowerNumbers ? -version.Build : 0, resetLowerNumbers ? -version.Revision : 0);
    

    public static Version AddVersion(this Version version, string addVersion) 
        return AddVersion(version, new Version(addVersion));
    
    public static Version AddVersion(this Version version, Version addVersion) 
        return AddVersion(version, addVersion.Major, addVersion.Minor, addVersion.Build, addVersion.Revision);
    
    public static Version AddVersion(this Version version, int major, int minor, int build, int revision) 
        return SetVersion(version, version.Major + major, version.Minor + minor, version.Build + build, version.Revision + revision);
    
    public static Version SetVersion(this Version version, int major, int minor, int build, int revision) 
        return new Version(major, minor, build, revision); 
    

    /*
    //one day we may even be able to do something like this...
    //https://github.com/dotnet/csharplang/issues/192
    public static Version operator +(Version version, int revision) 
        return AddVersion(version, 0, 0, 0, revision);
    
    public static Version operator ++(Version version) 
        return IncrementVersion(version);
       
    */

示例用法

void Main()

    Version myVersion = new Version ("1.2.3.4");
    myVersion = myVersion.IncrementRevision();
    Console.WriteLine(myVersion); //1.2.3.5
    myVersion = myVersion.IncrementMinor();
    Console.WriteLine(myVersion); //1.3.0.0

【参考方案2】：

我知道这有点老了，但对于任何寻找如何做到这一点的人来说，这可能会有所帮助：

string _versionDB = "1.0.0.0"

var version = new Version(_versionDB);

// Increment Major version
var newMajorVersion = new Version(version.Major+1,version.Minor,version.Build,version.Revision);
// Increment Minor version
var newMinorVersion = new Version(version.Major,version.Minor+1,version.Build,version.Revision);
// Increment Build version
var newBuildVersion = new Version(version.Major,version.Minor,version.Build+1,version.Revision);
// Increment Revision
var newRevisionVersion = new Version(version.Major,version.Minor,version.Build,version.Revision+1);

返回字符串以保存回数据库（基于您的变量名的假设）：

_versionDB = newMajorVersion.ToString();