C#批量上傳圖片

本程式主要功能有：

        （1）可以根據自己的需要更改上傳到伺服器上的目錄，上傳的源圖、縮圖、文字浮水印圖和圖片浮水印圖分別存入所定目錄下的不同目錄；

        （2）自動檢查目錄，如無所選擇的目錄，則自動建立它們；

        （3）自行設定產生縮圖的大小；

        （4）可以選擇是否需要產生文字浮水印、圖片浮水印，預設為不產生浮水印圖；

        （5）可以添加、刪除所需上傳的圖片。

        在本程式中均加了相關注釋，所以直接發代碼，不再多作解釋。

    背景程式：

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.IO;
using System.Net;
using System.Text.RegularExpressions;

/// 〈summary>
/// FileUpload1.HasFile 如果是true，則表示該控制項有檔案要上傳
/// FileUpload1.FileName 返回要上傳檔案的名稱，不包含路徑資訊
/// FileUpload1.FileContent 返回一個指向上傳檔案的流對象
/// FileUpload1.PostedFile   返回已經上傳檔案的引用
/// FileUpload1.PostedFile.ContentLength 返回上傳檔案的按位元組表示的檔案大小
/// FileUpload1.PostedFile.ContentType    返回上傳檔案的MIME內容類型，也就是檔案類型，如返回"image/jpg"
/// FileUpload1.PostedFile.FileName       返迴文件在用戶端的完全路徑（包括檔案名稱全稱）
/// FileUpload1.PostedFile.InputStream    返回一個指向上傳檔案的流對象
/// FileInfo對象表示磁碟或網路位置上的檔案。提供檔案的路徑，就可以建立一個FileInfo對象：
/// 〈/summary>

public partial class BackManagement_ImagesUpload : System.Web.UI.Page
{
    public string treePath = "";
    public int imageW = 100;
    public int imageH = 100;
    protected void Page_Load(object sender, EventArgs e)
    {
        this.Button5.Attributes.Add("Onclick", "window.close();"); //在本地關閉當前頁，而不需要發送到伺服器去關閉當前頁時
        if (!Page.IsPostBack)
        {
            Label2.Text = Server.MapPath("/");
            TextBox3.Text = "ImageUpload";
            treePath = Server.MapPath("/") + TextBox3.Text.Trim() + "/";
            TextBox4.Text = imageW.ToString();
            TextBox5.Text = imageH.ToString();
        }
    }
    protected void btnload_Click(object sender, EventArgs e)
    {
        //如果儲存圖片的目錄不存在，由建立它
        treePath = Server.MapPath("/") + TextBox3.Text.Trim() + "/";
        imageW = Convert.ToInt32(TextBox4.Text.ToString());
        imageH = Convert.ToInt32(TextBox5.Text.ToString());
        if (!File.Exists(treePath + "images"))   //如果/ImageUpload/images不存在，則建立/ImageUpload/images，用於存放源圖片
        {
            System.IO.Directory.CreateDirectory(treePath + "images");
        }
        if (!File.Exists(treePath + "thumbnails"))   //如果/ImageUpload/thumbnails不存在，則建立/ImageUpload/thumbnails，用於存放縮圖片
        {
            System.IO.Directory.CreateDirectory(treePath + "thumbnails");
        }
        if (!File.Exists(treePath + "textImages"))   //如果/ImageUpload/textImages不存在，則建立/ImageUpload/textImages，用於存文字浮水印圖片
        {
            System.IO.Directory.CreateDirectory(treePath + "textImages");
        }
        if (!File.Exists(treePath + "waterImages"))   //如果/ImageUpload/waterImages不存在，則建立/ImageUpload/waterImages，用於存圖形浮水印圖片
        {
            System.IO.Directory.CreateDirectory(treePath + "waterImages");
        }

        if (FileUpload1.HasFile)   //如果是true，則表示該控制項有檔案要上傳
        {
            string fileContentType = FileUpload1.PostedFile.ContentType;
            if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg")
            {
                string name = FileUpload1.PostedFile.FileName;                         //返迴文件在用戶端的完全路徑（包括檔案名稱全稱）

                FileInfo file = new FileInfo(name);                                    //FileInfo對象表示磁碟或網路位置上的檔案。提供檔案的路徑，就可以建立一個FileInfo對象：
                string fileName = file.Name;                                           // 檔案名稱
                string fileName_s = "x_" + file.Name;                                  // 縮圖檔案名稱
                string fileName_sy = "text_" + file.Name;                              // 浮水印圖檔案名稱（文字）
                string fileName_syp = "water_" + file.Name;                            // 浮水印圖檔案名稱（圖片）

                string webFilePath = treePath + "images/" + fileName;          // 伺服器端檔案路徑
                string webFilePath_s = treePath + "thumbnails/" + fileName_s; // 伺服器端縮圖路徑
                string webFilePath_sy = treePath + "textImages/" + fileName_sy; // 伺服器端帶浮水印圖路徑(文字)
                string webFilePath_syp = treePath + "waterImages/" + fileName_syp; // 伺服器端帶浮水印圖路徑(圖片)
                string webFilePath_sypf = Server.MapPath("../images/tzwhx.png");               // 伺服器端浮水印圖路徑(圖片)
                if (!File.Exists(webFilePath))
                {
                    try
                    {
                        FileUpload1.SaveAs(webFilePath);                                // 使用 SaveAs 方法儲存檔案
                        if (CheckBox1.Checked)                                          //是否產生文字浮水印圖
                        {
                            AddWater(webFilePath, webFilePath_sy);
                        }
                        if (CheckBox2.Checked)                                          //是否產生圖形浮水印圖
                        {
                            AddWaterPic(webFilePath, webFilePath_syp, webFilePath_sypf);
                        }
                        MakeThumbnail(webFilePath, webFilePath_s, imageW, imageH, "Cut");     // 產生縮圖方法
                        Label1.Text = "提示：檔案“" + fileName + "”成功上傳，並產生“" + fileName_s + "”縮圖，檔案類型為：" + FileUpload1.PostedFile.ContentType + "，檔案大小為：" + FileUpload1.PostedFile.ContentLength + "B";
                        Image1.ImageUrl = "/" + TextBox3.Text.ToString() + "/images/" + fileName;
                        TextBox1.Text = webFilePath;
                        TextBox2.Text = "/" + TextBox3.Text.ToString() + "/images/" + fileName;
                    }
                    catch (Exception ex)
                    {
                        Label1.Text = "提示：檔案上傳失敗，失敗原因：" + ex.Message;
                    }
                }
                else
                {
                    Label1.Text = "提示：檔案已經存在，請重新命名後上傳";
                }
            }
            else
            {
                Label1.Text = "提示：檔案類型不符";
            }
        }
    }
    /**/
    /// 〈summary>
    /// 產生縮圖
    /// 〈/summary>
    /// 〈param name="originalImagePath">源圖路徑（實體路徑）〈/param>
    /// 〈param name="thumbnailPath">縮圖路徑（實體路徑）〈/param>
    /// 〈param name="width">縮圖寬度〈/param>
    /// 〈param name="height">縮圖高度〈/param>
    /// 〈param name="mode">產生縮圖的方式〈/param>  
    public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
    {
        System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);

        int towidth = width;
        int toheight = height;

        int x = 0;
        int y = 0;
        int ow = originalImage.Width;
        int oh = originalImage.Height;

        switch (mode)
        {
            case "HW"://指定高寬縮放（可能變形）           
                break;
            case "W"://指定寬，高按比例                
                toheight = originalImage.Height * width / originalImage.Width;
                break;
            case "H"://指定高，寬按比例
                towidth = originalImage.Width * height / originalImage.Height;
                break;
            case "Cut"://指定高寬裁減（不變形）           
                if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
                {
                    oh = originalImage.Height;
                    ow = originalImage.Height * towidth / toheight;
                    y = 0;
                    x = (originalImage.Width - ow) / 2;
                }
                else
                {
                    ow = originalImage.Width;
                    oh = originalImage.Width * height / towidth;
                    x = 0;
                    y = (originalImage.Height - oh) / 2;
                }
                break;
            default:
                break;
        }

        //建立一個bmp圖片
        System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);

        //建立一個畫板
        System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);

        //設定高品質插值法
        g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

        //設定高品質,低速度呈現平滑程度
        g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

        //清空畫布並以透明背景色填充
        g.Clear(System.Drawing.Color.Transparent);

        //在指定位置並且按指定大小繪製原圖片的指定部分
        g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight),
            new System.Drawing.Rectangle(x, y, ow, oh),
            System.Drawing.GraphicsUnit.Pixel);

        try
        {
            //以jpg格式儲存縮圖
            bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
        }
        catch (System.Exception e)
        {
            throw e;
        }
        finally
        {
            originalImage.Dispose();
            bitmap.Dispose();
            g.Dispose();
        }
    }

    /**/
    /// 〈summary>
    /// 在圖片上增加文字浮水印
    /// 〈/summary>
    /// 〈param name="Path">原伺服器圖片路徑〈/param>
    /// 〈param name="Path_sy">產生的帶文字浮水印的圖片路徑〈/param>
    protected void AddWater(string Path, string Path_sy)
    {
        string addText = "www.tzwhx.com";
        System.Drawing.Image image = System.Drawing.Image.FromFile(Path);
        System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
        g.DrawImage(image, 0, 0, image.Width, image.Height);
        System.Drawing.Font f = new System.Drawing.Font("Verdana", 10);    //字型位置為左空10
        System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Green);

        g.DrawString(addText, f, b, 14, 14);    //字型大小為14X14
        g.Dispose();

        image.Save(Path_sy);
        image.Dispose();
    }

    /**/
    /// 〈summary>
    /// 在圖片上產生圖片浮水印
    /// 〈/summary>
    /// 〈param name="Path">原伺服器圖片路徑〈/param>
    /// 〈param name="Path_syp">產生的帶圖片浮水印的圖片路徑〈/param>
    /// 〈param name="Path_sypf">浮水印圖片路徑〈/param>
    protected void AddWaterPic(string Path, string Path_syp, string Path_sypf)
    {
        System.Drawing.Image image = System.Drawing.Image.FromFile(Path);
        System.Drawing.Image copyImage = System.Drawing.Image.FromFile(Path_sypf);
        System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
        g.DrawImage(copyImage, new System.Drawing.Rectangle(image.Width - copyImage.Width, image.Height - copyImage.Height, copyImage.Width, copyImage.Height), 0, 0, copyImage.Width, copyImage.Height, System.Drawing.GraphicsUnit.Pixel);
        g.Dispose();

        image.Save(Path_syp);
        image.Dispose();
    }

    protected void Button2_Click(object sender, EventArgs e)
    {
        //自動儲存遠程圖片
        WebClient client = new WebClient();
        //備用Reg:〈img.*?src=([\"\'])(http:\/\/.+\.(jpg|gif|bmp|bnp))\1.*?>
        Regex reg = new Regex("IMG[^>]*?src\\s*=\\s*(?:\"(?〈1>[^\"]*)\"|'(?〈1>[^\']*)')", RegexOptions.IgnoreCase);
        MatchCollection m = reg.Matches(TextBox1.Text);

        foreach (Match math in m)
        {
            string imgUrl = math.Groups[1].Value;

            //在原圖片名稱前加YYMMDD重名名並上傳

            Regex regName = new Regex(@"\w+.(?:jpg|gif|bmp|png)", RegexOptions.IgnoreCase);

            string strNewImgName = DateTime.Now.ToShortDateString().Replace("-", "") + regName.Match(imgUrl).ToString();

            try
            {
                //儲存圖片
                //client.DownloadFile(imgUrl, Server.MapPath("../ImageUpload/Auto/" + strNewImgName));
            }
            catch
            {
            }
            finally
            {

            }

            client.Dispose();
        }

        Response.Write("〈script>alert('遠程圖片儲存成功，儲存路徑為ImageUpload/auto')〈/script>");
    }
}

     前台代碼：

〈%@ Page Language="C#" AutoEventWireup="true" CodeFile="ImagesAutoUpload.aspx.cs" Inherits="BackManagement_ImagesAutoUpload" %>

〈!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 id="Head1" runat="server">
    〈title>自動上傳圖片並加文字浮水印〈/title>
〈/head>
〈body>
    〈form id="form1" runat="server" method="post" enctype="multipart/form-data">
    〈label for="pagebody1" style="display: none">
    〈/label>
    〈fieldset id="container">
        〈legend>上傳圖片並加文字浮水印〈/legend>
        〈div class="window" style="list-style: none;">
            〈div style="padding: 0px; width: 808px; height: 200px; float: left; margin-right: 0px;">
                〈ul>
                    〈li style="width: 150px; margin: 0px; padding: 0px; float: left;">
                        〈asp:Image ID="Image1" runat="server" Height="200px" BorderWidth="2px" Width="150px"
                            ImageUrl="~/images/Jpg/135X67/0_11_16.gif" />
                    〈/li>
                    〈li style="width: 250px; margin: 0px;">
                        〈asp:ListBox ID="FileList" runat="server" Width="250px" Height="200px">〈/asp:ListBox>
                    〈/li>
                    〈li style="width: 400px; margin: 0px; float: right;">
                        (1)圖片將儲存在你網站根目錄〈asp:TextBox ID="TextBox3" runat="server">〈/asp:TextBox>中，你可以修改它，但建議你使用預設目錄。〈br />
                        (2)上傳圖片儲存在所建目錄的子目錄 /images下；縮圖在 /thumbnails下；文字浮水印圖在 /textImages下；圖形浮水印圖在 /waterImages目錄下。〈br />
                        (3)產生的縮圖的預設寬度和高度均為100px，你也可以修改它們，寬為： 〈asp:TextBox ID="TextBox4" runat="server" Width="54px">〈/asp:TextBox>高為：〈asp:TextBox
                            ID="TextBox5" runat="server" Width="56px">〈/asp:TextBox>〈br />
                        〈asp:CheckBox ID="CheckBox1" runat="server" Text="文字浮水印" />
                        〈asp:CheckBox ID="CheckBox2" runat="server" Text="圖形浮水印" />
                            你可以選擇是否產生浮水印圖，預設不產生。 〈/li>
                〈/ul>
            〈/div>
        〈/div>
        〈div>
            〈asp:FileUpload ID="FindFile" runat="server" Width="529px" />
        〈/div>
        〈div>
            〈asp:TextBox ID="TipInfo" runat="server" Width="400px">〈/asp:TextBox>
            〈asp:TextBox ID="TextBox1" runat="server" Width="400px">〈/asp:TextBox>
        〈/div>
        〈div>
            〈asp:Button ID="Upload" runat="server" Text="上 傳" Style="height: 26px" OnClick="Upload_Click" />
            〈asp:Button ID="AddFile" runat="server" Text="添 加" OnClick="AddFile_Click1" />
            〈asp:Button ID="AddAllFile" runat="server" Text="全部添加" OnClick="AddAllFile_Click"
                Enabled="False" />
            〈asp:Button ID="DelFile" runat="server" Text="刪 除" OnClick="DelFile_Click1" />
            〈asp:Button ID="btnExit" runat="server" Text="完 成" />
        〈/div>
        〈div>
        〈/div>
    〈/fieldset>
    〈/form>
〈/body>
〈/html>

        另外，為解決大檔案上傳的限制，你必須在Web.config中加入以下代碼。

< system.web>

    < httpRuntime executionTimeout="90" maxRequestLength="20000" useFullyQualifiedRedirectUrl="false" requestLengthDiskThreshold="8192"/>

< /system.web>