求asp.net文件(主要是图片)上传的源码

[chenghaicys]

单个文件上传就可以。要能用的。google很久都没看见什么好用的。好多都有错误。
麻烦高手。我的email:[e-mail]

[GTX280]

参考
http://www.72e.net/support/docread.aspx?DocID=23&Title=Asp.net%20%E6%96%87%E4%BB%B6%E4%B8%8A%E4%BC%A0%E7%A4%BA%E4%BE%8B%E4%BB%A3%E7%A0%81
http://tech.ddvip.com/2008-09/122112344663739.html
http://www.knowsky.com/341377.html

[路人乙e]

string filename = file1.PostFile.FileName;
filename = filename.Substring(filename.LastIndexOf("\\")+1);
file1.PostFile.SaveAs(Server.MapPath("/upload/"+filename));

[pdsnet]

 if (FileUpload1.HasFile)
        {


            string strExPrentFile = FileUpload1.FileName.Substring(FileUpload1.FileName.LastIndexOf(".") + 1).ToUpper();
            string[] NoExPrentFile = new string[] { "JPG", "BMP", "PNG", "JPEG", "GIF" };
            bool IsUp = true;

            for (int j = 0; j < NoExPrentFile.Length; j++)
            {
                if (strExPrentFile.Equals(NoExPrentFile[j]))
                {
                    IsUp = false;

                }
            }
            if (!IsUp)
            {

                string name = string.Format("{0}.{1}", DateTime.Now.ToString("yyMMddHHmmssfff"), strExPrentFile);
                string fileName = name;                //文件名称
                string sFileName = "x_" + name;             //缩略图文件名 


                string filePath = Server.MapPath("~/UpFile/big/" + fileName);    //服务器端文件路径
                string sFilePath = Server.MapPath("~/UpFile/small/" + sFileName);//缩略图文件路径


                try
                {
                    FileUpload1.SaveAs(filePath);

                    MakeThumNail(filePath, sFilePath, 130, 130, "HW");
                    string big = "~/UpFile/big/" + fileName;
                    string small = "~/UpFile/small/" + sFileName;
                    Response.Write("<script>parent.document.form1.imgUrl.value='" +big+ "|';</script>");
                    Response.Write("<script>parent.document.form1.imgUrl1.value='" +small + "|';</script>");
                }
                catch (Exception ex)
                {

             
                    Response.Write("<script>alert('文件上传失败,请查看文件是否小于4M')</script>");
                }

            }
            else
            {
                Response.Write("<script>alert('文件类型出错')</script>");
            }


        }

 public static void MakeThumNail(string originalImagePath, string thumNailPath, int width, int height, string model)
    {
        System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);

        int thumWidth = width;      //缩略图的宽度
        int thumHeight = height;    //缩略图的高度

        int x = 0;
        int y = 0;

        int originalWidth = originalImage.Width;    //原始图片的宽度
        int originalHeight = originalImage.Height;  //原始图片的高度

        switch (model)
        {
            case "HW":      //指定高宽缩放,可能变形
                break;
            case "W":       //指定宽度,高度按照比例缩放
                thumHeight = originalImage.Height * width / originalImage.Width;
                break;
            case "H":       //指定高度,宽度按照等比例缩放
                thumWidth = originalImage.Width * height / originalImage.Height;
                break;
            case "Cut":
                if ((double)originalImage.Width / (double)originalImage.Height > (double)thumWidth / (double)thumHeight)
                {
                    originalHeight = originalImage.Height;
                    originalWidth = originalImage.Height * thumWidth / thumHeight;
                    y = 0;
                    x = (originalImage.Width - originalWidth) / 2;
                }
                else
                {
                    originalWidth = originalImage.Width;
                    originalHeight = originalWidth * height / thumWidth;
                    x = 0;
                    y = (originalImage.Height - originalHeight) / 2;
                }
                break;
            default:
                break;
        }

        //新建一个bmp图片
        System.Drawing.Image bitmap = new System.Drawing.Bitmap(thumWidth, thumHeight);

        //新建一个画板
        System.Drawing.Graphics graphic = System.Drawing.Graphics.FromImage(bitmap);

        //设置高质量查值法
        graphic.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

        //设置高质量，低速度呈现平滑程度
        graphic.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

        //清空画布并以透明背景色填充
        graphic.Clear(System.Drawing.Color.Transparent);

        //在指定位置并且按指定大小绘制原图片的指定部分
        graphic.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, thumWidth, thumHeight), new System.Drawing.Rectangle(x, y, originalWidth, originalHeight), System.Drawing.GraphicsUnit.Pixel);

        try
        {
            bitmap.Save(thumNailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
        }
        catch (Exception ex)
        {

            throw ex;
        }
        finally
        {
            originalImage.Dispose();
            bitmap.Dispose();
            graphic.Dispose();
        }

    }

[dayizhixiaotutu]

学习

[jiang_jiajia10]

http://www.51aspx.com/CV/ImageUpload/
下载这个就可以了。就不给你发email了

[zilong4460072]

关注

[octtiger]

学习中。。。。

[wuyq11]

参考
http://www.cnblogs.com/hutie1980/archive/2008/08/25/1275792.html
http://www.cnblogs.com/ltt1987/archive/2008/04/01/423242.html
http://www.cnblogs.com/jkobtr/archive/2006/06/01/415312.html

[robert126]

路过

[空心兜兜]

学习下