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ASP.net(C#)批量上傳圖片

2024-07-10 12:37:53
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供稿:網(wǎng)友

這篇關(guān)于ASP.Net批量上傳圖片的文章寫得非常好,偶爾在網(wǎng)上看到想轉(zhuǎn)載到這里,卻費(fèi)勁了周折。為了更新這篇文章,我用了近半個(gè)小時(shí),網(wǎng)上的轉(zhuǎn)載都?xì)埲辈蝗M蠹矣杏玫膮⒖家幌拢髡邔懙姆浅:谩?/p>

因本網(wǎng)站上傳圖片的需要,參考很多成熟的經(jīng)驗(yàn),在ASP.net平臺(tái)上使用C#語言,做了這一自動(dòng)批量上傳圖片的.ASPX文件,并經(jīng)調(diào)試成功,在本網(wǎng)站上使用,現(xiàn)發(fā)出來供大家參考,也希望高手多加指點(diǎn)。

本程序主要功能有:

(1)可以根據(jù)自己的需要更改上傳到服務(wù)器上的目錄,上傳的源圖、縮略圖、文字水印圖和圖片水印圖分別存入所定目錄下的不同目錄;

(2)自動(dòng)檢查目錄,如無所選擇的目錄,則自動(dòng)創(chuàng)建它們;

(3)自行設(shè)定生成縮略圖的大小;

(4)可以選擇是否需要生成文字水印、圖片水印,默認(rèn)為不生成水印圖;

(5)可以添加、刪除所需上傳的圖片。

在本程序中均加了相關(guān)注釋,所以直接發(fā)代碼,不再多作解釋。

后臺(tái)程序:

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,則表示該控件有文件要上傳
/// FileUpload1.FileName  返回要上傳文件的名稱,不包含路徑信息
/// FileUpload1.FileContent  返回一個(gè)指向上傳文件的流對(duì)象
/// FileUpload1.PostedFile   返回已經(jīng)上傳文件的引用
/// FileUpload1.PostedFile.ContentLength  返回上傳文件的按字節(jié)表示的文件大小
/// FileUpload1.PostedFile.ContentType    返回上傳文件的MIME內(nèi)容類型,也就是文件類型,如返回"image/jpg"
/// FileUpload1.PostedFile.FileName       返回文件在客戶端的完全路徑(包括文件名全稱)
/// FileUpload1.PostedFile.InputStream    返回一個(gè)指向上傳文件的流對(duì)象
/// FileInfo對(duì)象表示磁盤或網(wǎng)絡(luò)位置上的文件。提供文件的路徑,就可以創(chuàng)建一個(gè)FileInfo對(duì)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(guān)閉當(dāng)前頁,而不需要發(fā)送到服務(wù)器去關(guān)閉當(dāng)前頁時(shí)
        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)
    {
        //如果保存圖片的目錄不存在,由創(chuàng)建它
        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,則創(chuàng)建/ImageUpload/images,用于存放源圖片
        {
            System.IO.Directory.CreateDirectory(treePath + "images");
        }
        if (!File.Exists(treePath + "thumbnails"))   //如果/ImageUpload/thumbnails不存在,則創(chuàng)建/ImageUpload/thumbnails,用于存放縮略圖片
        {
            System.IO.Directory.CreateDirectory(treePath + "thumbnails");
        }
        if (!File.Exists(treePath + "textImages"))   //如果/ImageUpload/textImages不存在,則創(chuàng)建/ImageUpload/textImages,用于存文字水印圖片
        {
            System.IO.Directory.CreateDirectory(treePath + "textImages");
        }
        if (!File.Exists(treePath + "waterImages"))   //如果/ImageUpload/waterImages不存在,則創(chuàng)建/ImageUpload/waterImages
                                                                                     //用于存圖形水印圖片
        {
            System.IO.Directory.CreateDirectory(treePath + "waterImages");
        }

        if (FileUpload1.HasFile)   //如果是true,則表示該控件有文件要上傳
        {
            string fileContentType = FileUpload1.PostedFile.ContentType;
            if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg")
            {
                string name = FileUpload1.PostedFile.FileName;         //返回文件在客戶端的完全路徑(包括文件名全稱)
                FileInfo file = new FileInfo(name);          //FileInfo對(duì)象表示磁盤或網(wǎng)絡(luò)位置上的文件。提供文件的路徑,就可以創(chuàng)建一個(gè)FileInfo對(duì)象:
                string fileName = file.Name;                     // 文件名稱
                string fileName_s = "x_" + file.Name;     // 縮略圖文件名稱
                string fileName_sy = "text_" + file.Name;                              // 水印圖文件名稱(文字)
                string fileName_syp = "water_" + file.Name;                            // 水印圖文件名稱(圖片)

                string webFilePath = treePath + "images/" + fileName;          // 服務(wù)器端文件路徑
                string webFilePath_s = treePath + "thumbnails/" + fileName_s;    // 服務(wù)器端縮略圖路徑
                string webFilePath_sy = treePath + "textImages/" + fileName_sy;   // 服務(wù)器端帶水印圖路徑(文字)
                string webFilePath_syp = treePath + "waterImages/" + fileName_syp; // 服務(wù)器端帶水印圖路徑(圖片)
                string webFilePath_sypf = Server.MapPath("../images/tzwhx.png");               // 服務(wù)器端水印圖路徑(圖片)
               
                if (!File.Exists(webFilePath))
                {
                    try
                    {
                        FileUpload1.SaveAs(webFilePath);                                // 使用 SaveAs 方法保存文件
                        if (CheckBox1.Checked)                                          //是否生成文字水印圖
                        {
                            AddWater(webFilePath, webFilePath_sy);
                        }
                        if (CheckBox2.Checked)                                          //是否生成圖形水印圖
                        {
                            AddWaterPic(webFilePath, webFilePath_syp, webFilePath_sypf);
                        }
                        MakeThumbnail(webFilePath, webFilePath_s, imageW, imageH, "Cut");     // 生成縮略圖方法
                        Label1.Text = "提示:文件“" + fileName + "”成功上傳,并生成“" + fileName_s + "”縮略圖,文件類型為:" + FileUpload1.PostedFile.ContentType + ",文件大小為:" + 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:文件上傳失敗,失敗原因:" + ex.Message;
                    }
                }
                else
                {
                    Label1.Text = "提示:文件已經(jīng)存在,請(qǐng)重命名后上傳";
                }
            }
            else
            {
                Label1.Text = "提示:文件類型不符";
            }
        }
    }
    /**/
    /// 〈summary>
    /// 生成縮略圖
    /// 〈/summary>
    /// 〈param name="originalImagePath">源圖路徑(物理路徑)〈/param>
    /// 〈param name="thumbnailPath">縮略圖路徑(物理路徑)〈/param>
    /// 〈param name="width">縮略圖寬度〈/param>
    /// 〈param name="height">縮略圖高度〈/param>
    /// 〈param name="mode">生成縮略圖的方式〈/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;
        }

        //新建一個(gè)bmp圖片
        System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);

        //新建一個(gè)畫板
        System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);

        //設(shè)置高質(zhì)量插值法
        g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;

        //設(shè)置高質(zhì)量,低速度呈現(xiàn)平滑程度
        g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;

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

        //在指定位置并且按指定大小繪制原圖片的指定部分
        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格式保存縮略圖
            bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
        }
        catch (System.Exception e)
        {
            throw e;
        }
        finally
        {
            originalImage.Dispose();
            bitmap.Dispose();
            g.Dispose();
        }
    }

    /**/
    /// 〈summary>
    /// 在圖片上增加文字水印
    /// 〈/summary>
    /// 〈param name="Path">原服務(wù)器圖片路徑〈/param>
    /// 〈param name="Path_sy">生成的帶文字水印的圖片路徑〈/param>
    protected void AddWater(string Path, string Path_sy)
    {
        string addText = "www.survivalescaperooms.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);    //字體位置為左空10
        System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Green);

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

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

    /**/
    /// 〈summary>
    /// 在圖片上生成圖片水印
    /// 〈/summary>
    /// 〈param name="Path">原服務(wù)器圖片路徑〈/param>
    /// 〈param name="Path_syp">生成的帶圖片水印的圖片路徑〈/param>
    /// 〈param name="Path_sypf">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(dòng)保存遠(yuǎn)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重名名并上傳

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

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

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

            }

            client.Dispose();
        }

        Response.Write("〈script>alert('遠(yuǎn)程圖片保存成功,保存路徑為ImageUpload/auto')〈/script>");
    }
}


    前臺(tái)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(dòng)上傳圖片并加文字水印〈/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>上傳圖片并加文字水印〈/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)圖片將保存在你網(wǎng)站根目錄〈asp:TextBox ID="TextBox3" runat="server">〈/asp:TextBox>中,你可以修改它,但建議你使用默認(rèn)目錄。〈br />
                        (2)上傳圖片保存在所建目錄的子目錄 /images下;縮略圖在 /thumbnails下;文字水印圖在 /textImages下;圖形水印圖在 /waterImages目錄下。〈br />
                        (3)生成的縮略圖的默認(rèn)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="文字水印" />
                        〈asp:CheckBox ID="CheckBox2" runat="server" Text="圖形水印" />
                            你可以選擇是否生成水印圖,默認(rèn)不生成。 〈/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,為解決大文件上傳的限制,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>

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