使用Stream方式上传文件（不用FileUpload）保存图像的代码,CSharp代码库,德仔网

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【CSharp】使用Stream方式上传文件（不用FileUpload）保存图像的

作者:Dezai.CN / 发布于2013/2/20/ 600

本例将uploadfile上传的文件转变为缩略图，上传到服务器中

private System.Drawing.Imaging.ImageFormat GetImageFormat()
    {
        switch (FileUpload_Image.PostedFile.ContentType)
        {
            case "image/bmp":
               return System.Drawing.Imaging.ImageFormat.Bmp;
            case "image/gif":
               return System.Drawing.Imaging.ImageFormat.Gif;
            case "image/pjpeg":
            case "image/jpeg" :
               return System.Drawing.Imaging.ImageFormat.Jpeg;
            case "image/tiff":
               return System.Drawing.Imaging.ImageFormat.Tiff;
            case "image/x-png":
               return System.Drawing.Imaging.ImageFormat.Png;
            default:
               return null;
        }
    } 


  public bool CreateThumbForFile(string name)
    {

        string sThumbPath = string.Format("{0}t_{1}",Server.MapPath(imageFilePath), name); //新文件的全名

        try
        {
            if (File.Exists(sThumbPath))
            {
                File.Delete(sThumbPath);
            }
            if (File.Exists(sThumbPath) == false)
            {
                System.Drawing.Image oSource = System.Drawing.Image.FromFile(FileUpload_Image.PostedFile.FileName);
                System.Drawing.Image oDest = oSource.GetThumbnailImage(100, 100, new System.Drawing.Image.GetThumbnailImageAbort(MyCallBack), System.IntPtr.Zero);

                //oDest.Save(sThumbPath);   //这种方法行不通。
                FileStream fs = new FileStream(sThumbPath, FileMode.Create);
                oDest.Save(fs, GetImageFormat());
                fs.Close();
                fs = null;
            }
        }
        catch (Exception ex)
        {
            return false;
        }
        finally
        {
            ShowImage(string.Format("t_{0}", name));
        }
        return true;
    }

试试其它关键字

　Stream　

同语言下

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