如何替換具有相同名稱但不同類型的文件夾中另一圖像的圖像？

Question

假設我有一個文件夾，並在此文件夾中是一個名爲im1.png的圖像。我想im1.png被刪除，當我保存另一個圖像名爲im1.jpg或im1.bmp左右......（同名，但不同類型）在此文件夾中。我寫下面的代碼，但是這個代碼只是刪除了具有相同名稱和相同類型的文件。請幫我...

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

下面是做到這一點的一種方法：

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);