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ASP.NET之上傳文件管理策略

編輯：.NET實例教程

最近做的項目跟ASP.Net上傳文件內容有關，故將代碼貼出，以便網友查閱，提供解決此類問題思路：如出現任何不理解問題，請留言，及時幫您解決！

<%@ 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>::::上傳管理系統::::</title>
</head>
<body>
    <form id="form1" runat="server">
    <div >
        <br />
        <ASP:Label ID="LabelTitle" runat="server" Font-Bold="True" Font-Size="XX-Large" ForeColor="Black"
            Text="上傳管理"></ASP:Label><br />
        <br />
        <ASP:FileUpload ID="FileUpload1" runat="server" Width="369px"/>
         <ASP:Button ID="ButtonUp" runat="server" Height="21px" Text="上傳" Width="67px" OnClick="ButtonUp_Click" /><br />
        <br />
        <asp:Label ID="LabelTitle2" runat="server" ForeColor="Red" Text="*上傳文件不能超過2M"></ASP:Label><br />
        <b>原文件名：</b><span id ="FileName" runat="server" /><br />
        <b>上傳到服務器：</b><span id="SaveDir" runat="server" /><br />
        <b>縮略圖地址：</b><span id ="sSaveDir" runat ="server" /><br />
        <b>文件類型：</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>上傳日期：<br /><span id ="UpDateTime" runat ="server" /><br />
            圖片預覽:<br />
            <asp:Image ID="Image1" runat="server" ImageUrl="~/Login.ASPx" BorderColor="#0000C0"/>&l

t;br />
        </b>
        <br />
        <br />
         </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('圖片不能超過規定大小！');</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('圖片文件保存成功！');</script>");

                  #region SaveDataBasee
                    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;

FileUpload1.PostedFile.SaveAs(m_SavePath);
Response.Write("<script>alert('圖片文件保存成功！');</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控件內容
                         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('圖片格式不正確,請選擇圖片文件！');</script>");
                     }
                     #endregion
                 }
        #endregion
        }
        catch (Exception m_Ex)
            {
                Response .Write ("<script>alert('"+m_Ex.ToString ()+"');</script>");
            }
        }
        else if (FileUpload1.PostedFile.FileName == "")
        {
            Response.Write("<script>alert('上傳文件不能為空！');</script>");
        }
    }

    #region
    /// <summary>
    /// 計算文件大小函數,Size為字節大小
    /// </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>
    /// 高清晰縮略圖算法
    /// </summary>
    /// <param name="postFile">圖片文件對象</param>
    /// <param name="saveImg">要保存為縮略圖的源文件</param>
    /// <param name="Width">寬度</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;
        //設置高質量,低速度呈現平滑程度
        g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
        //ClearCanvas
        g.Clear(System.Drawing.Color.White);
        //在指定位置畫圖
        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
}