asp.net(C#)批量上传图片(完整版)
这篇关于ASP.Net批量上传图片的文章写得非常好,偶尔在网上看到想转载到这里,却费劲了周折。为了更新这篇文章,我用了近半个小时,网上的转载都残缺不全,希望大家有用的参考一下,作者写的非常好。
因本网站上传图片的需要,参考很多成熟的经验,在ASP.net平台上使用C#语言,做了这一自动批量上传图片的.ASPX文件,并经调试成功,在本网站上使用,现发出来供大家参考,也希望高手多加指点。
本程序主要功能有:
(1)可以根据自己的需要更改上传到服务器上的目录,上传的源图、缩略图、文字水印图和图片水印图分别存入所定目录下的不同目录;
(2)自动检查目录,如无所选择的目录,则自动创建它们;
(3)自行设定生成缩略图的大小;
(4)可以选择是否需要生成文字水印、图片水印,默认为不生成水印图;
(5)可以添加、删除所需上传的图片。
在本程序中均加了相关注释,所以直接发代码,不再多作解释。
后台程序:
1 using System; 2 using System.Collections; 3 using System.Configuration; 4 using System.Data; 5 using System.Linq; 6 using System.Web; 7 using System.Web.Security; 8 using System.Web.UI; 9 using System.Web.UI.HtmlControls; 10 using System.Web.UI.WebControls; 11 using System.Web.UI.WebControls.WebParts; 12 using System.Xml.Linq; 13 using System.IO; 14 using System.Net; 15 using System.Text.RegularExpressions; 16 /// 17 18 /// FileUpload1.HasFile 如果是true,则表示该控件有文件要上传 19 /// FileUpload1.FileName 返回要上传文件的名称,不包含路径信息 20 /// FileUpload1.FileContent 返回一个指向上传文件的流对象 21 /// FileUpload1.PostedFile 返回已经上传文件的引用 22 /// FileUpload1.PostedFile.ContentLength 返回上传文件的按字节表示的文件大小 23 /// FileUpload1.PostedFile.ContentType 返回上传文件的MIME内容类型,也就是文件类型,如返回"image/jpg" 24 /// FileUpload1.PostedFile.FileName 返回文件在客户端的完全路径(包括文件名全称) 25 /// FileUpload1.PostedFile.InputStream 返回一个指向上传文件的流对象 26 /// FileInfo对象表示磁盘或网络位置上的文件。提供文件的路径,就可以创建一个FileInfo对象: 27 /// 28 public partial class BackManagement_ImagesUpload : System.Web.UI.Page 29 { 30 public string treePath = ""; 31 public int imageW = 100; 32 public int imageH = 100; 33 protected void Page_Load(object sender, EventArgs e) 34 { 35 this.Button5.Attributes.Add("Onclick", "window.close();"); //在本地关闭当前页,而不需要发送到服务器去关闭当前页时 36 if (!Page.IsPostBack) 37 { 38 Label2.Text = Server.MapPath("/"); 39 TextBox3.Text = "ImageUpload"; 40 treePath = Server.MapPath("/") + TextBox3.Text.Trim() + "/"; 41 TextBox4.Text = imageW.ToString(); 42 TextBox5.Text = imageH.ToString(); 43 } 44 } 45 protected void btnload_Click(object sender, EventArgs e) 46 { 47 //如果保存图片的目录不存在,由创建它 48 treePath = Server.MapPath("/") + TextBox3.Text.Trim() + "/"; 49 imageW = Convert.ToInt32(TextBox4.Text.ToString()); 50 imageH = Convert.ToInt32(TextBox5.Text.ToString()); 51 if (!File.Exists(treePath + "images")) //如果/ImageUpload/images不存在,则创建/ImageUpload/images,用于存放源图片 52 { 53 System.IO.Directory.CreateDirectory(treePath + "images"); 54 } 55 if (!File.Exists(treePath + "thumbnails")) //如果/ImageUpload/thumbnails不存在,则创建/ImageUpload/thumbnails,用于存放缩略图片 56 { 57 System.IO.Directory.CreateDirectory(treePath + "thumbnails"); 58 } 59 if (!File.Exists(treePath + "textImages")) //如果/ImageUpload/textImages不存在,则创建/ImageUpload/textImages,用于存文字水印图片 60 { 61 System.IO.Directory.CreateDirectory(treePath + "textImages"); 62 } 63 if (!File.Exists(treePath + "waterImages")) //如果/ImageUpload/waterImages不存在,则创建/ImageUpload/waterImages 64 //用于存图形水印图片 65 { 66 System.IO.Directory.CreateDirectory(treePath + "waterImages"); 67 } 68 if (FileUpload1.HasFile) //如果是true,则表示该控件有文件要上传 69 { 70 string fileContentType = FileUpload1.PostedFile.ContentType; 71 if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg") 72 { 73 string name = FileUpload1.PostedFile.FileName; //返回文件在客户端的完全路径(包括文件名全称) 74 FileInfo file = new FileInfo(name); //FileInfo对象表示磁盘或网络位置上的文件。提供文件的路径,就可以创建一个FileInfo对象: 75 string fileName = file.Name; // 文件名称 76 string fileName_s = "x_" + file.Name; // 缩略图文件名称 77 string fileName_sy = "text_" + file.Name; // 水印图文件名称(文字) 78 string fileName_syp = "water_" + file.Name; // 水印图文件名称(图片) 79 string webFilePath = treePath + "images/" + fileName; // 服务器端文件路径 80 string webFilePath_s = treePath + "thumbnails/" + fileName_s; // 服务器端缩略图路径 81 string webFilePath_sy = treePath + "textImages/" + fileName_sy; // 服务器端带水印图路径(文字) 82 string webFilePath_syp = treePath + "waterImages/" + fileName_syp; // 服务器端带水印图路径(图片) 83 string webFilePath_sypf = Server.MapPath("../images/tzwhx.png"); // 服务器端水印图路径(图片) 84 85 if (!File.Exists(webFilePath)) 86 { 87 try 88 { 89 FileUpload1.SaveAs(webFilePath); // 使用 SaveAs 方法保存文件 90 if (CheckBox1.Checked) //是否生成文字水印图 91 { 92 AddWater(webFilePath, webFilePath_sy); 93 } 94 if (CheckBox2.Checked) //是否生成图形水印图 95 { 96 AddWaterPic(webFilePath, webFilePath_syp, webFilePath_sypf); 97 } 98 MakeThumbnail(webFilePath, webFilePath_s, imageW, imageH, "Cut"); // 生成缩略图方法 99 Label1.Text = "提示:文件“" + fileName + "”成功上传,并生成“" + fileName_s + "”缩略图,文件类型为:" + FileUpload1.PostedFile.ContentType + ",文件大小为:" + FileUpload1.PostedFile.ContentLength + "B"; 100 Image1.ImageUrl = "/" + TextBox3.Text.ToString() + "/images/" + fileName; 101 TextBox1.Text = webFilePath; 102 TextBox2.Text = "/" + TextBox3.Text.ToString() + "/images/" + fileName; 103 } 104 catch (Exception ex) 105 { 106 Label1.Text = "提示:文件上传失败,失败原因:" + ex.Message; 107 } 108 } 109 else 110 { 111 Label1.Text = "提示:文件已经存在,请重命名后上传"; 112 } 113 } 114 else 115 { 116 Label1.Text = "提示:文件类型不符"; 117 } 118 } 119 }
相关联的图片处理方法:
1 /// 〈summary> 2 /// 生成缩略图 3 /// 〈/summary> 4 /// 〈param name="originalImagePath">源图路径(物理路径)〈/param> 5 /// 〈param name="thumbnailPath">缩略图路径(物理路径)〈/param> 6 /// 〈param name="width">缩略图宽度〈/param> 7 /// 〈param name="height">缩略图高度〈/param> 8 /// 〈param name="mode">生成缩略图的方式〈/param> 9 public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode) 10 { 11 System.Drawing.Image riginalImage = System.Drawing.Image.FromFile(originalImagePath); 12 int towidth = width; 13 int toheight = height; 14 int x = 0; 15 int y = 0; 16 int w = originalImage.Width; 17 int h = originalImage.Height; 18 switch (mode) 19 { 20 case "HW"://指定高宽缩放(可能变形) 21 break; 22 case "W"://指定宽,高按比例 23 toheight = originalImage.Height * width / originalImage.Width; 24 break; 25 case "H"://指定高,宽按比例 26 towidth = originalImage.Width * height / originalImage.Height; 27 break; 28 case "Cut"://指定高宽裁减(不变形) 29 if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight) 30 { 31 h = originalImage.Height; 32 w = originalImage.Height * towidth / toheight; 33 y = 0; 34 x = (originalImage.Width - ow) / 2; 35 } 36 else 37 { 38 w = originalImage.Width; 39 h = originalImage.Width * height / towidth; 40 x = 0; 41 y = (originalImage.Height - oh) / 2; 42 } 43 break; 44 default: 45 break; 46 } 47 //新建一个bmp图片 48 System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight); 49 //新建一个画板 50 System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap); 51 //设置高质量插值法 52 g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High; 53 //设置高质量,低速度呈现平滑程度 54 g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; 55 //清空画布并以透明背景色填充 56 g.Clear(System.Drawing.Color.Transparent); 57 //在指定位置并且按指定大小绘制原图片的指定部分 58 g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight), 59 new System.Drawing.Rectangle(x, y, ow, oh), 60 System.Drawing.GraphicsUnit.Pixel); 61 try 62 { 63 //以jpg格式保存缩略图 64 bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg); 65 } 66 catch (System.Exception e) 67 { 68 throw e; 69 } 70 finally 71 { 72 originalImage.Dispose(); 73 bitmap.Dispose(); 74 g.Dispose(); 75 } 76 }
1 /// 〈summary> 2 /// 在图片上增加文字水印 3 /// 〈/summary> 4 /// 〈param name="Path">原服务器图片路径〈/param> 5 /// 〈param name="Path_sy">生成的带文字水印的图片路径〈/param> 6 protected void AddWater(string Path, string Path_sy) 7 { 8 string addText = "www.biye5u.com"; 9 System.Drawing.Image image = System.Drawing.Image.FromFile(Path); 10 System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image); 11 g.DrawImage(image, 0, 0, image.Width, image.Height); 12 System.Drawing.Font f = new System.Drawing.Font("Verdana", 10); //字体位置为左空10 13 System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Green); 14 g.DrawString(addText, f, b, 14, 14); //字体大小为14X14 15 g.Dispose(); 16 image.Save(Path_sy); 17 image.Dispose(); 18 } 19 20 /// 〈summary> 21 /// 在图片上生成图片水印 22 /// 〈/summary> 23 /// 〈param name="Path">原服务器图片路径〈/param> 24 /// 〈param name="Path_syp">生成的带图片水印的图片路径〈/param> 25 /// 〈param name="Path_sypf">水印图片路径〈/param> 26 protected void AddWaterPic(string Path, string Path_syp, string Path_sypf) 27 { 28 System.Drawing.Image image = System.Drawing.Image.FromFile(Path); 29 System.Drawing.Image copyImage = System.Drawing.Image.FromFile(Path_sypf); 30 System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image); 31 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); 32 g.Dispose(); 33 image.Save(Path_syp); 34 image.Dispose(); 35 } 36 protected void Button2_Click(object sender, EventArgs e) 37 { 38 //自动保存远程图片 39 WebClient client = new WebClient(); 40 //备用Reg:〈img.*?src=([\"\'])(http:\/\/.+\.(jpg|gif|bmp|bnp))\1.*?> 41 Regex reg = new Regex("IMG[^>]*?src\\s*=\\s*(?:\"(?〈1>[^\"]*)\"|'(?〈1>[^\']*)')", RegexOptions.IgnoreCase); 42 MatchCollection m = reg.Matches(TextBox1.Text); 43 foreach (Match math in m) 44 { 45 string imgUrl = math.Groups[1].Value; 46 //在原图片名称前加YYMMDD重名名并上传 47 Regex regName = new Regex(@"\w+.(?:jpg|gif|bmp|png)", RegexOptions.IgnoreCase); 48 string strNewImgName = DateTime.Now.ToShortDateString().Replace("-", "") + regName.Match(imgUrl).ToString(); 49 try 50 { 51 //保存图片 52 //client.DownloadFile(imgUrl, Server.MapPath("../ImageUpload/Auto/" + strNewImgName)); 53 54 } 55 catch 56 { 57 } 58 finally 59 { 60 } 61 client.Dispose(); 62 } 63 Response.Write("〈script>alert('远程图片保存成功,保存路径为ImageUpload/auto')〈/script>"); 64 } 65 }
前台代码:
1 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="ImagesAutoUpload.aspx.cs" Inherits="BackManagement_ImagesAutoUpload" %> 2 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 3 <html xmlns="http://www.w3.org/1999/xhtml"> 4 <head id="Head1" runat="server"> 5 <title>自动上传图片并加文字水印</title> 6 </head> 7 <body> 8 <form. id="form1" runat="server" method="post" enctype="multipart/form-data"> 9 <label for="pagebody1" style="display: none"> 10 </label> 11 <fieldset id="container"> 12 <legend>上传图片并加文字水印</legend> 13 <div class="window" style="list-style. none;"> 14 <div style="padding: 0px; width: 808px; height: 200px; float: left; margin-right: 0px;"> 15 <ul> 16 <li style="width: 150px; margin: 0px; padding: 0px; float: left;"> 17 <asp:Image ID="Image1" runat="server" Height="200px" BorderWidth="2px" Width="150px" ImageUrl="~/images/Jpg/135X67/0_11_16.gif" /> 18 </li> 19 <li style="width: 250px; margin: 0px;"> 20 <asp:ListBox ID="FileList" runat="server" Width="250px" Height="200px"></asp:ListBox> 21 </li> 22 <li style="width: 400px; margin: 0px; float: right;"> <br /> 23 (1)图片将保存在你网站根目录中,你可以修改它,但建议你使用默认目录。 24 <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox> 25 <br /> 26 (2)上传图片保存在所建目录的子目录 /images下;缩略图在 /thumbnails下;文字水印图在 /textImages下;图形水印图在 /waterImages目录下。<br /> 27 (3)生成的缩略图的默认宽度和高度均为100px,你也可以修改它们, 28 宽为: 29 <asp:TextBox ID="TextBox4" runat="server" Width="54px"></asp:TextBox> 30 高为: 31 <asp:TextBox ID="TextBox5" runat="server" Width="56px"></asp:TextBox> <br /> 32 <asp:CheckBox ID="CheckBox1" runat="server" Text="文字水印" /> 33 <asp:CheckBox ID="CheckBox2" runat="server" Text="图形水印" /> 34 你可以选择是否生成水印图,默认不生成。 35 </li> 36 </ul> 37 </div> 38 </div> 39 <div> 40 <asp:FileUpload ID="FindFile" runat="server" Width="529px" /> 41 </div> 42 <div> 43 <asp:TextBox ID="TipInfo" runat="server" Width="400px"></asp:TextBox> 44 <asp:TextBox ID="TextBox1" runat="server" Width="400px"></asp:TextBox> 45 </div> 46 <div> 47 <asp:Button ID="Upload" runat="server" Text="上 传" Style="height: 26px" nClick="Upload_Click" /> 48 <asp:Button ID="AddFile" runat="server" Text="添 加" nClick="AddFile_Click1" /> 49 <asp:Button ID="AddAllFile" runat="server" Text="全部添加" nClick="AddAllFile_Click" Enabled="False" /> 50 <asp:Button ID="DelFile" runat="server" Text="删 除" nClick="DelFile_Click1" /> 51 <asp:Button ID="btnExit" runat="server" Text="完 成" /> 52 </div> 53 <div> 54 55 </div> 56 </fieldset> 57 </form> 58 </body> 59 </html>
另外,为解决大文件上传的限制,你必须在Web.config中加入以下代码。
1 < system.web> 2 < httpRuntime executionTimeout="90" maxRequestLength="20000" useFullyQualifiedRedirectUrl="false" requestLengthDiskThreshold="8192"/> 3 < /system.web>