該進程無法訪問該文件，因爲它正在被另一個進程asp.net c＃使用？

Question

我想要將圖像上傳到我的服務器文件夾並將其調整大小後，從垃圾文件夾中刪除圖像。但後來我收到這條消息，它不讓我從垃圾文件夾中刪除圖像。我該如何解決這個問題？

if (FileUpload1.HasFile) 
{ 
    long fileSize = FileUpload1.FileContent.Length; 
    double sizeinBytes = fileSize * 0.001; 
    FileUpload1.SaveAs(Server.MapPath("~/junk/" + FileUpload1.FileName)); 
    string filepath = Server.MapPath("~/junk/" +FileUpload1.FileName); 

    System.IO.FileStream fs = System.IO.File.OpenRead(filepath); 
    byte[] data = new byte[fs.Length]; 
    fs.Read(data, 0, data.Length); 

    System.IO.MemoryStream ms = new System.IO.MemoryStream(data); 
    System.Drawing.Image image = System.Drawing.Image.FromStream(ms); 
    Bitmap resizedimage = ResizeImage(image, 500, 500); 
    resizedimage.Save(Server.MapPath("~/images/" + FileUpload1.FileName + ".jpeg")); 
    Image1.ImageUrl = "~/images/" + FileUpload1.FileName; 
    var filePath = Server.MapPath("~/junk/" + FileUpload1.FileName); 
    if (File.Exists(filePath)) 
    { 
     File.Delete(filePath); 
    } 
} 

Answer 1

你已經完成時，你的封裝文件流如下圖所示，使其得到處理：

using(FileStream fs = System.IO.File.OpenRead(filepath)) 
{ 
    //do stuff 
} 

//delete 

Answer 2

if (FileUpload1.HasFile) 
      { 
       long fileSize = FileUpload1.FileContent.Length; 
       double sizeinBytes = fileSize * 0.001; 
       FileUpload1.SaveAs(Server.MapPath("~/junk/" + FileUpload1.FileName)); 
       string filepath = Server.MapPath("~/junk/" + FileUpload1.FileName); 

       using (System.IO.FileStream fs = System.IO.File.OpenRead(filepath)) 
       { 
        byte[] data = new byte[fs.Length]; 
        fs.Read(data, 0, data.Length); 

        System.IO.MemoryStream ms = new System.IO.MemoryStream(data); 
        System.Drawing.Image image = System.Drawing.Image.FromStream(ms); 
        Bitmap resizedimage = ResizeImage(image, 500, 500); 
        resizedimage.Save(Server.MapPath("~/images/" + FileUpload1.FileName + ".jpeg")); 
       } 
       Image1.ImageUrl = "~/images/" + FileUpload1.FileName; 
       var filePath = Server.MapPath("~/junk/" + FileUpload1.FileName); 
       if (File.Exists(filePath)) 
       { 
        File.Delete(filePath); 
       } 
      }