如何替换具有相同名称但不同类型的文件夹中另一图像的图像？

Question

假设我有一个文件夹，并在此文件夹中是一个名为im1.png的图像。我想im1.png被删除，当我保存另一个图像名为im1.jpg或im1.bmp左右......（同名，但不同类型）在此文件夹中。我写下面的代码，但是这个代码只是删除了具有相同名称和相同类型的文件。请帮我...

string CopyPic(string MySourcePath, string key, string imgNum) 
    { 
     string curpath; 
     string newpath; 

     curpath = Application.Current + @"\FaceDBIMG\" + key; 

     if (Directory.Exists(curpath) == false) 
      Directory.CreateDirectory(curpath); 

     newpath = curpath + "\\" + imgNum + MySourcePath.Substring(MySourcePath.LastIndexOf(".")); 

     string[] similarFiles = Directory.GetFiles(curpath, imgNum + ".*").ToArray(); 

     foreach (var similarFile in similarFiles) 
      File.Delete(similarFile); 

     File.Copy(MySourcePath, newpath); 

     return newpath; 
    } 

Answer 1

下面是做到这一点的一种方法：

string filename = ...; //e.g. c:\directory\filename.ext 

//Get the directory where the file lives 
string dir = Path.GetDirectoryName(filename); 

//Get the filename without the extension to use it to search the directory for similar files 
string filenameWithoutExtension = Path.GetFileNameWithoutExtension(filename); 

//Search the directory for files with same name, but with any extension 
//We use the Except method to remove the file it self form the search results 
string[] similarFiles = 
    Directory.GetFiles(dir, filenameWithoutExtension + ".*") 
    .Except(
     new []{filename}, 
     //We should ignore the case when we remove the file itself 
     StringComparer.OrdinalIgnoreCase) 
    .ToArray(); 

//Delete these files 
foreach(var similarFile in similarFiles) 
    File.Delete(similarFile);