c# 常见文件路径Api的使用示例

var currentDomainBaseDirectory = AppDomain.CurrentDomain.BaseDirectory;
var result = File.Exists(Path.Combine(currentDomainBaseDirectory, @"FooAFolder\FooAFolder.txt"))? "存在FooAFolder.txt": "不存在FooAFolder.txt";
Console.WriteLine(result);
result = File.Exists(Path.Combine(currentDomainBaseDirectory, @"FooA.txt"))? "存在FooA.txt": "不存在FooA.txt";
Console.WriteLine(result);
//存在FooAFolder.txt
//存在FooA.txt


var currentDirectory = System.Environment.CurrentDirectory;
result=File.Exists(Path.Combine(currentDirectory, @"FooAFolder\FooAFolder.txt")) ? "存在FooAFolder.txt" : "不存在FooAFolder.txt";
Console.WriteLine(result);
result = File.Exists(Path.Combine(currentDirectory, @"FooA.txt")) ? "存在FooA.txt" : "不存在FooA.txt";
Console.WriteLine(result);
//存在FooAFolder.txt
//存在FooA.txt

var mainExecuteDirectory = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
result = File.Exists(Path.Combine(mainExecuteDirectory, @"FooAFolder\FooAFolder.txt")) ? "存在FooAFolder.txt" : "不存在FooAFolder.txt";
Console.WriteLine(result);
result = File.Exists(Path.Combine(mainExecuteDirectory, @"FooA.txt")) ? "存在FooA.txt" : "不存在FooA.txt";
Console.WriteLine(result);
//存在FooAFolder.txt
//存在FooA.txt

//通过反射获取程序集
var fooAssembly = Assembly.GetAssembly(typeof(FooA));
var fooAExecuteDirectory = Path.GetDirectoryName(fooAssembly.Location);
result = File.Exists(Path.Combine(fooAExecuteDirectory, @"FooAFolder\FooAFolder.txt")) ? "存在FooAFolder.txt" : "不存在FooAFolder.txt";
Console.WriteLine(result);
result = File.Exists(Path.Combine(fooAExecuteDirectory, @"FooA.txt")) ? "存在FooA.txt" : "不存在FooA.txt";
Console.WriteLine(result);
Console.ReadLine();
//存在FooAFolder.txt
//存在FooA.txt

public static class FooB
{
    public static void GetExecutingAssemblyPath()
    {
        Console.WriteLine(Assembly.GetExecutingAssembly().Location);
    }

    public static void GetCallingAssemblyPath()
    {
        Console.WriteLine(Assembly.GetCallingAssembly().Location);
    }

    public static void GetEntryAssemblyPath()
    {
        Console.WriteLine(Assembly.GetEntryAssembly().Location);
    }

 }


public  static class FooA
{
    public static void ExecuteFooBGetCallingAssemblyPath()
    {
        FooB.GetCallingAssemblyPath();
    }

    public static void ExecuteFooBGetExecutingAssemblyPath()
    {
        FooB.GetExecutingAssemblyPath();
    }
}

//调用
Console.WriteLine($"{nameof(FooA.ExecuteFooBGetExecutingAssemblyPath)}:");
FooA.ExecuteFooBGetExecutingAssemblyPath();

Console.WriteLine($"{nameof(FooA.ExecuteFooBGetCallingAssemblyPath)}:");
FooA.ExecuteFooBGetCallingAssemblyPath();

Console.WriteLine($"{nameof(FooB.GetExecutingAssemblyPath)}:");
FooB.GetExecutingAssemblyPath();

Console.WriteLine($"{nameof(FooB.GetCallingAssemblyPath)}:");
FooB.GetCallingAssemblyPath();

Console.WriteLine($"{nameof(FooB.GetEntryAssemblyPath)}:");
FooB.GetEntryAssemblyPath();

ExecuteFooBGetExecutingAssemblyPath:
C:\Users\Ryzen\source\repos\CommonFilePathapiSample\Main.Shell\bin\Debug\netcoreapp3.1\FooBLibrary.dll

ExecuteFooBGetCallingAssemblyPath:
C:\Users\Ryzen\source\repos\CommonFilePathApiSample\Main.Shell\bin\Debug\netcoreapp3.1\FooALibrary.dll

GetExecutingAssemblyPath:
C:\Users\Ryzen\source\repos\CommonFilePathApiSample\Main.Shell\bin\Debug\netcoreapp3.1\FooBLibrary.dll

GetCallingAssemblyPath:
C:\Users\Ryzen\source\repos\CommonFilePathApiSample\Main.Shell\bin\Debug\netcoreapp3.1\Main.Shell.dll

GetEntryAssemblyPath:
C:\Users\Ryzen\source\repos\CommonFilePathApiSample\Main.Shell\bin\Debug\netcoreapp3.1\Main.Shell.dl

Console.WriteLine(Path.GetTempPath());
//C:\Users\Ryzen\AppData\Local\Temp\