c# - 该进程无法访问该文件，因为它正被另一个进程 asp.net c# 使用？

Question

在将图像上传到我的服务器文件夹并调整其大小后，我试图从垃圾文件夹中删除图像。但是后来我收到了这条消息，它不允许我从垃圾文件夹中删除图像。我该如何解决这个问题？

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

您必须像下面这样封装您的文件流，以便在完成后将其处理掉:

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

//delete