ASP.NET的上传文件管理策略

ASP.NET的上传文件管理策略2010-12-31最近做的项目跟ASP.NET上传文件内容有关，故将代码贴出，以便网友查阅，提供解决此类问题思路：如出现任何不理解问题，请留言，及时帮您解决！
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Login.aspx.cs" Inherits="Login" %>

<！DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
  <title>::::上传管理系统::::</title>
</head>
<body>
  <form id="form1" runat="server">
  <div style="border-right: #ffff00 thin dashed; border-top: #ffff00 thin dashed; margin-bottom: 4px; margin-left: 55px; border-left: #ffff00 thin dashed; line-height: normal; margin-right: 55px; padding-top: 1px; border-bottom: #ffff00 thin dashed; letter-spacing: normal; position: static; background-color: silver; text-align: center">
    <br />
    <asp:Label ID="LabelTitle" runat="server" Font-Bold="True" Font-Size="XX-Large" ForeColor="Black"
      Text="上传管理"></asp:Label><br />
    <br />
    <asp:FileUpload ID="FileUpload1" runat="server" Width="369px"/>
    &nbsp;<asp:Button ID="ButtonUp" runat="server" Height="21px" Text="上 传" Width="67px" OnClick="ButtonUp_Click" /><br />
    <br />
    <asp:Label ID="LabelTitle2" runat="server" ForeColor="Red" Text="*上传文件不能超过2M"></asp:Label><br />
    <b>原文件名：</b><span id ="FileName" runat="server" /><br />
    <b>上传到服务器：</b><span id="SaveDir" runat="server" /><br />
    <b>缩略图地址：</b><span id ="sSaveDir" runat ="server" /><br />
    <b>文件类型：</b><span id ="FileType" runat ="server" /><br />
    <b>文件大小：</b><span id="FileLength" runat ="server" /><br />
    <b>文件拓展名：</b><span id="FileExtention" runat="server" /><br />
    <b>上传日期：<br /><span id ="UpDateTime" runat ="server" /><br />
      图片预览:<br />
      <asp:Image ID="Image1" runat="server" ImageUrl="~/Login.aspx" BorderColor="#0000C0"/><br />
    </b>
    <br />
    <br />
    &nbsp;</div>
  </form>
</body>
</html>

*******************************************************************************

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using MWO.Model.Info;
using MWO.DAL.Info;
public partial class Login : System.Web.UI.Page
{
  protected void Page_Load（object sender, EventArgs e）
  {
  }
  protected void ButtonUp_Click（object sender, EventArgs e）
  {
    if （FileUpload1.PostedFile.FileName ！= null）
    {
      try
      {
         FileName.InnerHtml = FileUpload1.PostedFile.FileName;//GetPhotoName
         UpDateTime.InnerHtml = DateTime.Now.ToShortDateString（）;//UpDateTime

         #region  SetPhotoSize
        FileLength.InnerHtml = CountSize（FileUpload1.PostedFile.ContentLength）;
         if （FileUpload1.PostedFile.ContentLength > 1024 * 1024 * 2）
         {
           Response.Write（"<script>alert（"图片不能超过规定大小！"）;</script>"）;
         }
         else
         {
          #region  SetPhotoFormat
           FileType.InnerHtml = FileUpload1.PostedFile.ContentType;
           FileExtention.InnerHtml = System.IO.Path.GetExtension（FileUpload1.PostedFile.FileName）.ToUpper（）;
           string m_FileName = "www.MWO.Com-" + DateTime.Now.ToString（"yyyy-MM-dd-HH-mm-ss-ffff"）.Replace（".", "-"） + FileExtention.InnerHtml;
           string m_sFileName = "www.MWO.Com-" + DateTime.Now.ToString（"yyyy-MM-dd-HH-mm-ss-ffff"）.Replace（".", "-"） + FileExtention.InnerHtml;
           if （FileExtention.InnerHtml == ".JPG"）
           {
             string m_SavePath = Server.MapPath（"./photo/"） + m_FileName;
             SaveDir.InnerHtml = m_SavePath;

          #region   SetSmallPhoto
           this.MakeSmallImg（FileUpload1.PostedFile, this.Server.MapPath（"./SPhoto/"） + m_sFileName, 118, 90）;
           string m_sSavePath = this.Server.MapPath（"./SPhoto/"） + m_sFileName;
           sSaveDir.InnerHtml = m_sSavePath;
          #endregion

             FileUpload1.PostedFile.SaveAs（m_SavePath）;
             Response.Write（"<script>alert（"图片文件保存成功！"）;</script>"）;

         #region SaveDataBasee
             PhotoInfo m_PInfo = new PhotoInfo（）;
             m_PInfo.Organization = "5173";
             m_PInfo.PicName = FileName.InnerHtml;
             m_PInfo.ServerName = "GLSDB";
             m_PInfo.Cdate = DateTime.Now;
             m_PInfo.Exp = FileExtention.InnerHtml;
             m_PInfo.Flag = 0;
             m_PInfo.GameNickName = "Bruce";//TextBox控件内容
             m_PInfo.MoonStar = 0;
             m_PInfo.ShowIndex = 0;
             m_PInfo.SPicHttpAddr = m_sSavePath;
             m_PInfo.Type = 0;
             m_PInfo.Vote = 0;
             m_PInfo.PicHttpAddr=m_SavePath;

             PhotoDAO m_PDao = new PhotoDAO（）;
             m_PDao.Insert（m_PInfo）;
             #endregion
           }
           else
           {
             Response.Write（"<script>alert（"图片格式不正确,请选择图片文件！"）;</script>"）;
           }
           #endregion
         }
    #endregion
    }
    catch （Exception m_Ex）
      {
        Response .Write （"<script>alert（""+m_Ex.ToString （）+""）;</script>"）;
      }
    }
    else if （FileUpload1.PostedFile.FileName == ""）
    {
      Response.Write（"<script>alert（"上传文件不能为空！"）;</script>"）;
    }
  }

  #region
  /// <summary>
  /// 计算文件大小函数,Size为字节大小
  /// </summary>
  /// <param name="Size">初始文件大小</param>
  /// <returns></returns>
  public string CountSize（long Size）
  {
    string m_strSize = "";
    long FactSize = 0; FactSize = Size;
    if （FactSize <= 1024）
      m_strSize = FactSize.ToString（） + "Byte";
    if（FactSize>=1024&&FactSize<=1048576）
    m_strSize=（FactSize/1024）.ToString （）+"K";
    if （FactSize >= 1048576 && FactSize <= 10485760）
    m_strSize = （FactSize / 1024 / 1024）.ToString（） + "M";
    return m_strSize;
  }
  #endregion

  #region  SaveSmallPhoto
  /// <summary>
  /// 高清晰缩略图算法
  /// </summary>
  /// <param name="postFile">图片文件对象</param>
  /// <param name="saveImg">要保存为缩略图的源文件</param>
  /// <param name="Width">宽度</param>
  /// <param name="Height">高度</param>
  public void MakeSmallImg（System.Web.HttpPostedFile postFile, string saveImg, System.Double Width, System.Double Height）
  {

    //SourcePhotoName
    string m_OriginalFilename = postFile.FileName;
    string m_strGoodFile = saveImg;

    //GetPhotoObject From SourceFile
    System.Drawing.Image m_Image = System.Drawing.Image.FromStream（postFile.InputStream, true）;

    System.Double NewWidth, NewHeight;
    if （m_Image.Width > m_Image.Height）
    {
      NewWidth = Width;
      NewHeight = m_Image.Height * （NewWidth / m_Image.Width）;
    }
    else
    {
      NewHeight = Height;
      NewWidth = （NewHeight / m_Image.Height） * m_Image.Width;
    }

    if （NewWidth > Width）
    {
      NewWidth = Width;
    }
    if （NewHeight > Height）
    {
      NewHeight = Height;
    }

    //GetPhotoSize
    System.Drawing.Size size =new System.Drawing.Size（（int）NewWidth, （int）NewHeight）;
    //The New of Bimp Photo
    System.Drawing.Image bitmap = new System.Drawing.Bitmap（size.Width, size.Height）;
    // The New of Palette
    System.Drawing.Graphics g = System.Drawing.Graphics.FromImage（bitmap）;
    // Set HightQuality Arithmetic For Graphics
    g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
    //设置高质量,低速度呈现平滑程度
    g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
    //ClearCanvas
    g.Clear（System.Drawing.Color.White）;
    //在指定位置画图
    g.DrawImage（m_Image, new System.Drawing.Rectangle（0, 0, bitmap.Width, bitmap.Height）,
    new System.Drawing.Rectangle（0, 0, m_Image.Width, m_Image.Height）,
    System.Drawing.GraphicsUnit.Pixel）;

    //SavePhoto Of HightFocus
    bitmap.Save（m_strGoodFile, System.Drawing.Imaging.ImageFormat.Jpeg）;
    //DisposeRes
    g.Dispose（）;
    m_Image.Dispose（）;
    bitmap.Dispose（）;
  }

  #endregion
}