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:
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using System;
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using System.Collections;
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using System.Configuration;
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using System.Data;
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using System.Linq;
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using System.Web;
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using System.Web.Security;
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using System.Web.UI;
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using System.Web.UI.HtmlControls;
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using System.Web.UI.WebControls;
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using System.Web.UI.WebControls.WebParts;
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using System.Xml.Linq;
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using System.IO;
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using System.Net;
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using System.Text.RegularExpressions;
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/// <summary>
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/// FileUpload1.HasFile 如果是true,则表示该控件有文件要上传
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/// FileUpload1.FileName 返回要上传文件的名称,不包含路径信息
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/// FileUpload1.FileContent 返回一个指向上传文件的流对象
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/// FileUpload1.PostedFile 返回已经上传文件的引用
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/// FileUpload1.PostedFile.ContentLength 返回上传文件的按字节表示的文件大小
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/// 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"
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/// FileUpload1.PostedFile.FileName 返回文件在客户端的完全路径(包括文件名全称)
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/// FileUpload1.PostedFile.InputStream 返回一个指向上传文件的流对象
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/// 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:
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/// </summary>
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public partial class BackManagement_ImagesUpload : System.Web.UI.Page
- {
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public string treePath = "";
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public int imageW = 100;
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public int imageH = 100;
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protected void Page_Load(object sender, EventArgs e)
- {
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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
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if (!Page.IsPostBack)
- {
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Label2.Text = Server.MapPath("/");
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TextBox3.Text = "ImageUpload";
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treePath = Server.MapPath("/") + TextBox3.Text.Trim() + "/";
- TextBox4.Text = imageW.ToString();
- TextBox5.Text = imageH.ToString();
- }
- }
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protected void btnload_Click(object sender, EventArgs e)
- {
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//如果保存图片的目录不存在,由创建它
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treePath = Server.MapPath("/") + TextBox3.Text.Trim() + "/";
- imageW = Convert.ToInt32(TextBox4.Text.ToString());
- imageH = Convert.ToInt32(TextBox5.Text.ToString());
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if (!File.Exists(treePath + "images")) //如果/ImageUpload/images不存在,则创建/ImageUpload/images,用于存放源图片
- {
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System.IO.Directory.CreateDirectory(treePath + "images");
- }
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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
- {
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System.IO.Directory.CreateDirectory(treePath + "thumbnails");
- }
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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
- {
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System.IO.Directory.CreateDirectory(treePath + "textImages");
- }
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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
- {
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System.IO.Directory.CreateDirectory(treePath + "waterImages");
- }
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if (FileUpload1.HasFile) //如果是true,则表示该控件有文件要上传
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string fileContentType = FileUpload1.PostedFile.ContentType;
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if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg")
- {
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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)
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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:
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string fileName = file.Name; // 文件名称
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string fileName_s = "x_" + file.Name; // 缩略图文件名称
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string fileName_sy = "text_" + file.Name; // 水印图文件名称(文字)
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string fileName_syp = "water_" + file.Name; // 水印图文件名称(图片)
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string webFilePath = treePath + "images/" + fileName; // 服务器端文件路径
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string webFilePath_s = treePath + "thumbnails/" + fileName_s; // 服务器端缩略图路径
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string webFilePath_sy = treePath + "textImages/" + fileName_sy; // 服务器端带水印图路径(文字)
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string webFilePath_syp = treePath + "waterImages/" + fileName_syp; // 服务器端带水印图路径(图片)
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string webFilePath_sypf = Server.MapPath("../images/tzwhx.png"); // 服务器端水印图路径(图片)
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if (!File.Exists(webFilePath))
- {
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try
- {
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FileUpload1.SaveAs(webFilePath); // 使用 SaveAs 方法保存文件
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if (CheckBox1.Checked) //是否生成文字水印图
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- AddWater(webFilePath, webFilePath_sy);
- }
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if (CheckBox2.Checked) //是否生成图形水印图
- {
- AddWaterPic(webFilePath, webFilePath_syp, webFilePath_sypf);
- }
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MakeThumbnail(webFilePath, webFilePath_s, imageW, imageH, "Cut"); // 生成缩略图方法
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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";
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Image1.ImageUrl = "/" + TextBox3.Text.ToString() + "/images/" + fileName;
- TextBox1.Text = webFilePath;
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TextBox2.Text = "/" + TextBox3.Text.ToString() + "/images/" + fileName;
- }
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catch (Exception ex)
- {
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Label1.Text = "提示:文件上传失败,失败原因:" + ex.Message;
- }
- }
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else
- {
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Label1.Text = "提示:文件已经存在,请重命名后上传";
- }
- }
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else
- {
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Label1.Text = "提示:文件类型不符";
- }
- }
- }
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/**/
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/// <summary>
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/// 生成缩略图
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/// </summary>
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/// <param name="originalImagePath">源图路径(物理路径)</param>
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/// <param name="thumbnailPath">缩略图路径(物理路径)</param>
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/// <param name="width">缩略图宽度</param>
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/// <param name="height">缩略图高度</param>
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/// <param name="mode">生成缩略图的方式</param>
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public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)
- {
- System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);
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int towidth = width;
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int toheight = height;
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int x = 0;
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int y = 0;
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int ow = originalImage.Width;
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int oh = originalImage.Height;
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switch (mode)
- {
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case "HW"://指定高宽缩放(可能变形)
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break;
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case "W"://指定宽,高按比例
- toheight = originalImage.Height * width / originalImage.Width;
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break;
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case "H"://指定高,宽按比例
- towidth = originalImage.Width * height / originalImage.Height;
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break;
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case "Cut"://指定高宽裁减(不变形)
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if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)
- {
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- oh = originalImage.Height;
- ow = originalImage.Height * towidth / toheight;
- y = 0;
- x = (originalImage.Width - ow) / 2;
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} else
- {
- ow = originalImage.Width;
- oh = originalImage.Width * height / towidth;
- x = 0;
- y = (originalImage.Height - oh) / 2;
- }
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break;
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default:
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break;
- }
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//新建一个bmp图片
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System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);
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//新建一个画板
- System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
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//设置高质量插值法
- g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
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//设置高质量,低速度呈现平滑程度
- g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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//清空画布并以透明背景色填充
- g.Clear(System.Drawing.Color.Transparent);
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//在指定位置并且按指定大小绘制原图片的指定部分
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g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight),
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new System.Drawing.Rectangle(x, y, ow, oh),
- System.Drawing.GraphicsUnit.Pixel);
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try
- {
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//以jpg格式保存缩略图
- bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);
- }
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catch (System.Exception e)
- {
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throw e;
- }
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finally
- {
- originalImage.Dispose();
- bitmap.Dispose();
- g.Dispose();
- }
- }
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/**/
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/// <summary>
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/// 在图片上增加文字水印
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/// </summary>
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/// <param name="Path">原服务器图片路径</param>
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/// <param name="Path_sy">生成的带文字水印的图片路径</param>
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protected void AddWater(string Path, string Path_sy)
- {
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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);
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System.Drawing.Font f = new System.Drawing.Font("Verdana", 10); //字体位置为左空10
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System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Green);
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g.DrawString(addText, f, b, 14, 14); //字体大小为14X14
- g.Dispose();
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- image.Save(Path_sy);
- image.Dispose();
- }
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/**/
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/// <summary>
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/// 在图片上生成图片水印
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/// </summary>
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/// <param name="Path">原服务器图片路径</param>
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/// <param name="Path_syp">生成的带图片水印的图片路径</param>
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/// <param name="Path_sypf">水印图片路径</param>
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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);
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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();
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- image.Save(Path_syp);
- image.Dispose();
- }
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protected void Button2_Click(object sender, EventArgs e)
- {
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//自动保存远程图片
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WebClient client = new WebClient();
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//备用Reg:<img.*?src=([\"\\'])(http:\/\/.+\.(jpg|gif|bmp|bnp))\1.*?>
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Regex reg = new Regex("IMG[^>]*?src\\s*=\\s*(?:\"(?<1>[^\"]*)\"|\'(?<1>[^\\']*)\')", RegexOptions.IgnoreCase);
- MatchCollection m = reg.Matches(TextBox1.Text);
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foreach (Match math in m)
- {
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string imgUrl = math.Groups[1].Value;
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//在原图片名称前加YYMMDD重名名并上传
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Regex regName = new Regex(@"\w+.(?:jpg|gif|bmp|png)", RegexOptions.IgnoreCase);
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string strNewImgName = DateTime.Now.ToShortDateString().Replace("-", "") + regName.Match(imgUrl).ToString();
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try
- {
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//保存图片
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//client.DownloadFile(imgUrl, Server.MapPath("../ImageUpload/Auto/" + strNewImgName));
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- }
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catch
- {
- }
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finally
- {
- }
- client.Dispose();
- }
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Response.Write("<mce:script type="text/javascript"><!--
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alert(\'远程图片保存成功,保存路径为ImageUpload/auto\')
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// --></mce:script>");
- }
- }
前台代码:
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<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ImagesAutoUpload.aspx.cs" Inherits="BackManagement_ImagesAutoUpload" %>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head id="Head1" runat="server">
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<title>自动上传图片并加文字水印</title>
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</head>
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<body>
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<form id="form1" runat="server" method="post" enctype="multipart/form-data">
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<label for="pagebody1" style="display: none" mce_style="display: none">
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</label>
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<fieldset id="container">
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<legend>上传图片并加文字水印</legend>
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<div class="window" style="list-style: none;" mce_style="list-style: none;">
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<div style="padding: 0px; width: 808px; height: 200px; float: left; margin-right: 0px;">
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<ul>
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<li style="width: 150px; margin: 0px; padding: 0px; float: left;">
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<asp:Image ID="Image1" runat="server" Heig, ht="200px" BorderWidth="2px" Width="150px"
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ImageUrl="~/images/Jpg/135X67/0_11_16.gif" />
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</li>
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<li style="width: 250px; margin: 0px;">
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<asp:ListBox ID="FileList" runat="server" Width="250px" Height="200px"></asp:ListBox>
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</li>
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<li style="width: 400px; margin: 0px; float: right;">
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(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 />
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(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 />
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(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
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ID="TextBox5" runat="server" Width="56px"></asp:TextBox><br />
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<asp:CheckBox ID="CheckBox1" runat="server" Text="文字水印" />
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<asp:CheckBox ID="CheckBox2" runat="server" Text="图形水印" />
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你可以选择是否生成水印图,默认不生成。 </li>
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</ul>
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</div>
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</div>
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<div>
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<asp:FileUpload ID="FindFile" runat="server" Width="529px" />
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</div>
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<div>
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<asp:TextBox ID="TipInfo" runat="server" Width="400px"></asp:TextBox>
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<asp:TextBox ID="TextBox1" runat="server" Width="400px"></asp:TextBox>
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</div>
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<div>
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<asp:Button ID="Upload" runat="server" Text="上 传" Style="height: 26px" mce_Style="height: 26px" OnClick="Upload_Click" />
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<asp:Button ID="AddFile" runat="server" Text="添 加" OnClick="AddFile_Click1" />
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<asp:Button ID="AddAllFile" runat="server" Text="全部添加" OnClick="AddAllFile_Click"
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Enabled="False" />
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<asp:Button ID="DelFile" runat="server" Text="删 除" OnClick="DelFile_Click1" />
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<asp:Button ID="btnExit" runat="server" Text="完 成" />
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</div>
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<div>
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</div>
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</fieldset>
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</form>
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</body>
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</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。
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<system.web>
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<httpRuntime executionTimeout="90" maxRequestLength="20000" useFullyQualifiedRedirectUrl="false" requestLengthDiskThreshold="8192"/>
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</system.web>
文章出处:http://www.diybl.com/course/4_webprogram/asp.net/asp_netxl/2008106/148796_3.html
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