我创建了一个图片上传器，供用户上传/裁剪他们的个人资料照片。当用户上传文件时，该文件会保存到一个文件中，以便他们对其进行裁剪后立即访问。

我尝试使用Path.GetTempPath（）以及Path.GetTempFileName（），但是由于某些原因，我的裁剪器无法找到文件位置。 任何建议都将不胜感激。

更新：因此我在btnCropClick的末尾添加了File.Delete（filePath），但出现一条错误消息，指出该进程无法访问该文件，因为该文件正在被另一个进程使用。我如何“释放”要立即删除的文件？

下面是用户上传其选择的原始图片的代码

protected void btnUploadClick(object sender,EventArgs e)
    {
        //Upload Original Image Here
        String UploadFileName = "";
        String UploadFilePath = "";

        if (fileUploader.HasFile)
        {
            String ext = Path.GetExtension(fileUploader.FileName).ToLower();
            if (ext == ".jpg" || ext == ".jpeg" || ext == ".png")
            {
                UploadFileName = "orig_" + Guid.NewGuid().ToString() + ext;
                UploadFilePath = Path.Combine(Server.MapPath("images/OriginalImages"),UploadFileName);
                try
                {
                    fileUploader.SaveAs(UploadFilePath); //TODO: Need to make this a temp file that gets "destroyed" later

                    imgUpload.ImageUrl = "images/OriginalImages/" + UploadFileName;
                    panCrop.Visible = true;
                }
                catch (Exception ex)
                {
                    lblMsg.Text = "Error! Please Try Again. ";
                }
            }
            else
            {
                lblMsg.Text = "Invalid File Type Selected. | Please Choose .jpg,.jpeg,or .png file only.";
            }
        }
        else
        {
            lblMsg.Text = "Please Click 'Choose File' & Select An Image To Upload";
        }
    }

这是裁剪机的代码（不确定此处是否需要更改，但是为了上下文和相关性，我还是将其包括在内

    protected void btnCropClick(object sender,EventArgs e)
    {
        //Crop Image Here & Save
        String fileName = Path.GetFileName(imgUpload.ImageUrl);
        String filePath = Path.Combine(Server.MapPath("images/OriginalImages"),fileName);
        String cropFileName = "";
        String cropFilePath = "";

        if (File.Exists(filePath))
        {
            System.Drawing.Image orgImg = System.Drawing.Image.FromFile(filePath);

            Rectangle CropArea = new Rectangle(
                Convert.ToInt32(X.Value),Convert.ToInt32(Y.Value),Convert.ToInt32(W.Value),Convert.ToInt32(H.Value)
                );

            try
            {
                Bitmap bitMap = new Bitmap(CropArea.Width,CropArea.Height);
                using (Graphics g = Graphics.FromImage(bitMap))
                {
                    g.DrawImage(orgImg,new Rectangle(0,bitMap.Width,bitMap.Height),CropArea,GraphicsUnit.Pixel);

                    Bitmap resized = new Bitmap(bitMap,new Size(200,200)); //Resize image to save as 200x200

                    cropFileName = "crop_" + fileName; //+UserID so each fileName is unique
                    cropFilePath = Path.Combine(Server.MapPath("images/CroppedImages"),cropFileName);
                    resized.Save(cropFilePath); //Where final,cropped image is saved
                    imgHeadshot.ImageUrl = "images/CroppedImages/" + cropFileName;
                }
            }
            catch (Exception ex)
            {
                throw;
            }

            panCrop.Visible = false;
        }
    }