ASP.NET2.0(c#)图片上传源码(10)

filename = filepath.Substring(filepath.LastIndexOf("\\") + 1);
                string serverpath = Server.MapPath("images/") + System.DateTime.Now.ToString("yyy-MM-dd-hh-mm-ss") + Session.SessionID + filename;
                FileUpload1.PostedFile.SaveAs(serverpath);
                this.lb_info.Text = "上传成功！";
            }
        }
        catch (Exception error)
        {
            this.lb_info.Text = "上传发生错误！原因：" + error.ToString();
        }

注：GUID的方法：Guid myGuid=Guid.NewGuid();

7.上传图片生成等比例缩略图

效果图：

缩略图代码：
ImageThumbnail.cs
using System;
using System.IO;
using System.Drawing;
using System.Drawing.Imaging;

public class ImageThumbnail
{
    public Image ResourceImage;
    private int ImageWidth;
    private int ImageHeight;
    public string ErrorMessage;

    public ImageThumbnail(Stream  ImageFileName)
    {
        ResourceImage = System.Drawing.Image.FromStream(ImageFileName);
        ErrorMessage = "";
    }

    public bool ThumbnailCallback()
    {
        return false;
    }

 

    // 方法1，按大小
    public bool ReducedImage(int Width, int Height, string targetFilePath)
    {
        try
        {
            Image ReducedIma