来自:http://blog.itpub.net/9869521/viewspace-667955/
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:
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;///
/// FileUpload1.HasFile 如果是true,则表示该控件有文件要上传/// FileUpload1.FileName 返回要上传文件的名称,不包含路径信息/// FileUpload1.FileContent 返回一个指向上传文件的流对象/// FileUpload1.PostedFile 返回已经上传文件的引用/// FileUpload1.PostedFile.ContentLength 返回上传文件的按字节表示的文件大小/// 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"/// FileUpload1.PostedFile.FileName 返回文件在客户端的完全路径(包括文件名全称)/// FileUpload1.PostedFile.InputStream 返回一个指向上传文件的流对象/// 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:///
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();"); //在本地关闭当前页,而不需要发送到服务器去关闭当前页时 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) { //如果保存图片的目录不存在,由创建它 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,则创建/ImageUpload/images,用于存放源图片 { System.IO.Directory.CreateDirectory(treePath + "images"); } 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 { System.IO.Directory.CreateDirectory(treePath + "thumbnails"); } 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 { System.IO.Directory.CreateDirectory(treePath + "textImages"); } if (!File.Exists(treePath + "waterImages")) //如果/ImageUpload/waterImages不存在,则创建/ImageUpload/waterImages //用于存图形水印图片 { System.IO.Directory.CreateDirectory(treePath + "waterImages"); }if (FileUpload1.HasFile) //如果是true,则表示该控件有文件要上传
{ string fileContentType = FileUpload1.PostedFile.ContentType; if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg") { string name = FileUpload1.PostedFile.FileName; //返回文件在客户端的完全路径(包括文件名全称) 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: string fileName = file.Name; // 文件名称 string fileName_s = "x_" + file.Name; // 缩略图文件名称 string fileName_sy = "text_" + file.Name; // 水印图文件名称(文字) string fileName_syp = "water_" + file.Name; // 水印图文件名称(图片)string webFilePath = treePath + "images/" + fileName; // 服务器端文件路径
string webFilePath_s = treePath + "thumbnails/" + fileName_s; // 服务器端缩略图路径 string webFilePath_sy = treePath + "textImages/" + fileName_sy; // 服务器端带水印图路径(文字) string webFilePath_syp = treePath + "waterImages/" + fileName_syp; // 服务器端带水印图路径(图片) string webFilePath_sypf = Server.MapPath("../images/tzwhx.png"); // 服务器端水印图路径(图片) if (!File.Exists(webFilePath)) { try { FileUpload1.SaveAs(webFilePath); // 使用 SaveAs 方法保存文件 if (CheckBox1.Checked) //是否生成文字水印图 { AddWater(webFilePath, webFilePath_sy); } if (CheckBox2.Checked) //是否生成图形水印图 { AddWaterPic(webFilePath, webFilePath_syp, webFilePath_sypf); } MakeThumbnail(webFilePath, webFilePath_s, imageW, imageH, "Cut"); // 生成缩略图方法 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"; Image1.ImageUrl = "/" + TextBox3.Text.ToString() + "/images/" + fileName; TextBox1.Text = webFilePath; TextBox2.Text = "/" + TextBox3.Text.ToString() + "/images/" + fileName; } catch (Exception ex) { Label1.Text = "提示:文件上传失败,失败原因:" + ex.Message; } } else { Label1.Text = "提示:文件已经存在,请重命名后上传"; } } else { Label1.Text = "提示:文件类型不符"; } } } /**/ /// 〈summary> /// 生成缩略图 /// 〈/summary> /// 〈param name="originalImagePath">源图路径(物理路径)〈/param> /// 〈param name="thumbnailPath">缩略图路径(物理路径)〈/param> /// 〈param name="width">缩略图宽度〈/param> /// 〈param name="height">缩略图高度〈/param> /// 〈param name="mode">生成缩略图的方式〈/param> public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode) { System.Drawing.Image riginalImage = System.Drawing.Image.FromFile(originalImagePath);int towidth = width;
int toheight = height;int x = 0;
int y = 0; int w = originalImage.Width; int h = originalImage.Height;switch (mode)
{ case "HW"://指定高宽缩放(可能变形) break; case "W"://指定宽,高按比例 toheight = originalImage.Height * width / originalImage.Width; break; case "H"://指定高,宽按比例 towidth = originalImage.Width * height / originalImage.Height; break; case "Cut"://指定高宽裁减(不变形) if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight) { h = originalImage.Height; w = originalImage.Height * towidth / toheight; y = 0; x = (originalImage.Width - ow) / 2; } else { w = originalImage.Width; h = originalImage.Width * height / towidth; x = 0; y = (originalImage.Height - oh) / 2; } break; default: break; }//新建一个bmp图片
System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);//新建一个画板
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);//设置高质量插值法
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;//清空画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绘制原图片的指定部分
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格式保存缩略图 bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg); } catch (System.Exception e) { throw e; } finally { originalImage.Dispose(); bitmap.Dispose(); g.Dispose(); } }/**/
/// 〈summary> /// 在图片上增加文字水印 /// 〈/summary> /// 〈param name="Path">原服务器图片路径〈/param> /// 〈param name="Path_sy">生成的带文字水印的图片路径〈/param> protected void AddWater(string Path, string Path_sy) { string addText = "www.biye5u.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); //字体位置为左空10 System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Green);g.DrawString(addText, f, b, 14, 14); //字体大小为14X14
g.Dispose();image.Save(Path_sy);
image.Dispose(); }/**/
/// 〈summary> /// 在图片上生成图片水印 /// 〈/summary> /// 〈param name="Path">原服务器图片路径〈/param> /// 〈param name="Path_syp">生成的带图片水印的图片路径〈/param> /// 〈param name="Path_sypf">水印图片路径〈/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)
{ //自动保存远程图片 WebClient client = new WebClient(); //备用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;//在原图片名称前加YYMMDD重名名并上传
Regex regName = new Regex(@"\w+.(?:jpg|gif|bmp|png)", RegexOptions.IgnoreCase);
string strNewImgName = DateTime.Now.ToShortDateString().Replace("-", "") + regName.Match(imgUrl).ToString();
try
{ //保存图片 //client.DownloadFile(imgUrl, Server.MapPath("../ImageUpload/Auto/" + strNewImgName)); } catch { } finally {}
client.Dispose();
}Response.Write("〈script>alert('远程图片保存成功,保存路径为ImageUpload/auto')〈/script>");
}} 前台代码: 〈%@ Page Language="" 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>自动上传图片并加文字水印〈/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>上传图片并加文字水印〈/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)图片将保存在你网站根目录〈asp:TextBox ID="TextBox3" runat="server">〈/asp:TextBox>中,你可以修改它,但建议你使用默认目录。〈br /> (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 /> (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,宽为: 〈asp:TextBox ID="TextBox4" runat="server" Width="54px">〈/asp:TextBox>高为:〈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="图形水印" /> 你可以选择是否生成水印图,默认不生成。 〈/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 传" Style="height: 26px" nClick="Upload_Click" /> 〈asp:Button ID="AddFile" runat="server" Text="添 加" nClick="AddFile_Click1" /> 〈asp:Button ID="AddAllFile" runat="server" Text="全部添加" nClick="AddAllFile_Click" Enabled="False" /> 〈asp:Button ID="DelFile" runat="server" Text="删 除" nClick="DelFile_Click1" /> 〈asp:Button ID="btnExit" runat="server" Text="完 成" /> 〈/div> 〈div> 〈/div> 〈/fieldset> 〈/form>〈/body>〈/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。
< system.web>
< httpRuntime executionTimeout="90" maxRequestLength="20000" useFullyQualifiedRedirectUrl="false" requestLengthDiskThreshold="8192"/>
< /system.web>