批量上传图片并自动生成缩略图,文字水印图,图片水印图代码,Asp.Net代码库,德仔网

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代码分类
【Asp.Net】批量上传图片并自动生成缩略图,文字水印图,图片水印图
作者:Dezai.CN / 发布于2011/9/13/ 666
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。
<div><span style="font-size: 16px">using System;</span>
<span style="font-size: 16px">using System.Collections;</span>
<span style="font-size: 16px">using System.Configuration;</span>
<span style="font-size: 16px">using System.Data;</span>
<span style="font-size: 16px">using System.Linq;</span>
<span style="font-size: 16px">using System.Web;</span>
<span style="font-size: 16px">using System.Web.Security;</span>
<span style="font-size: 16px">using System.Web.UI;</span>
<span style="font-size: 16px">using System.Web.UI.HtmlControls;</span>
<span style="font-size: 16px">using System.Web.UI.WebControls;</span>
<span style="font-size: 16px">using System.Web.UI.WebControls.WebParts;</span>
<span style="font-size: 16px">using System.Xml.Linq;</span>
<span style="font-size: 16px">using System.IO;</span>
<span style="font-size: 16px">using System.Net;</span>
<span style="font-size: 16px">using System.Text.RegularExpressions;</span>
<span style="font-size: 16px">/// 〈summary></span>
<span style="font-size: 16px">/// FileUpload1.HasFile 如果是true，则表示该控件有文件要上传</span>
<span style="font-size: 16px">/// FileUpload1.FileName 返回要上传文件的名称，不包含路径信息</span>
<span style="font-size: 16px">/// FileUpload1.FileContent 返回一个指向上传文件的流对象</span>
<span style="font-size: 16px">/// FileUpload1.PostedFile 返回已经上传文件的引用</span>
<span style="font-size: 16px">/// FileUpload1.PostedFile.ContentLength 返回上传文件的按字节表示的文件大小</span>
<span style="font-size: 16px">/// 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"</span>
<span style="font-size: 16px">/// FileUpload1.PostedFile.FileName 返回文件在客户端的完全路径（包括文件名全称）</span>
<span style="font-size: 16px">/// FileUpload1.PostedFile.InputStream 返回一个指向上传文件的流对象</span>
<span style="font-size: 16px">/// 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：</span>
<span style="font-size: 16px">/// 〈/summary></span>
<span style="font-size: 16px">public partial class BackManagement_ImagesUpload : System.Web.UI.Page</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">public string treePath = "" ;</span>
<span style="font-size: 16px">public int imageW = 100;</span>
<span style="font-size: 16px">public int imageH = 100;</span>
<span style="font-size: 16px">protected void Page_Load( object sender, EventArgs e)</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">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</span>
<span style="font-size: 16px">if (!Page.IsPostBack)</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">Label2.Text = Server.MapPath( "/" );</span>
<span style="font-size: 16px">TextBox3.Text = "ImageUpload" ;</span>
<span style="font-size: 16px">treePath = Server.MapPath( "/" ) + TextBox3.Text.Trim() + "/" ;</span>
<span style="font-size: 16px">TextBox4.Text = imageW.ToString();</span>
<span style="font-size: 16px">TextBox5.Text = imageH.ToString();</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">protected void btnload_Click( object sender, EventArgs e)</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">//如果保存图片的目录不存在，由创建它</span>
<span style="font-size: 16px">treePath = Server.MapPath( "/" ) + TextBox3.Text.Trim() + "/" ;</span>
<span style="font-size: 16px">imageW = Convert.ToInt32(TextBox4.Text.ToString());</span>
<span style="font-size: 16px">imageH = Convert.ToInt32(TextBox5.Text.ToString());</span>
<span style="font-size: 16px">if (!File.Exists(treePath + "images" )) //如果/ImageUpload/images不存在，则创建/ImageUpload/images，用于存放源图片</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">System.IO.Directory.CreateDirectory(treePath + "images" );</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">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</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">System.IO.Directory.CreateDirectory(treePath + "thumbnails" );</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">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</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">System.IO.Directory.CreateDirectory(treePath + "textImages" );</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">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</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">System.IO.Directory.CreateDirectory(treePath + "waterImages" );</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">if (FileUpload1.HasFile) //如果是true，则表示该控件有文件要上传</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">string fileContentType = FileUpload1.PostedFile.ContentType;</span>
<span style="font-size: 16px">if (fileContentType == "image/bmp" || fileContentType == "image/gif" || fileContentType == "image/pjpeg" )</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">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）</span>
<span style="font-size: 16px">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：</span>
<span style="font-size: 16px">string fileName = file.Name; // 文件名称</span>
<span style="font-size: 16px">string fileName_s = "x_" + file.Name; // 缩略图文件名称</span>
<span style="font-size: 16px">string fileName_sy = "text_" + file.Name; // 水印图文件名称（文字）</span>
<span style="font-size: 16px">string fileName_syp = "water_" + file.Name; // 水印图文件名称（图片）</span>
<span style="font-size: 16px">string webFilePath = treePath + "images/" + fileName; // 服务器端文件路径</span>
<span style="font-size: 16px">string webFilePath_s = treePath + "thumbnails/" + fileName_s;　　 // 服务器端缩略图路径</span>
<span style="font-size: 16px">string webFilePath_sy = treePath + "textImages/" + fileName_sy;　 // 服务器端带水印图路径(文字)</span>
<span style="font-size: 16px">string webFilePath_syp = treePath + "waterImages/" + fileName_syp;　 // 服务器端带水印图路径(图片)</span>
<span style="font-size: 16px">string webFilePath_sypf = Server.MapPath( "../images/tzwhx.png" );　 // 服务器端水印图路径(图片)</span>

<span style="font-size: 16px">if (!File.Exists(webFilePath))</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">try</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">FileUpload1.SaveAs(webFilePath); // 使用 SaveAs 方法保存文件</span>
<span style="font-size: 16px">if (CheckBox1.Checked) //是否生成文字水印图</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">AddWater(webFilePath, webFilePath_sy);</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">if (CheckBox2.Checked) //是否生成图形水印图</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">AddWaterPic(webFilePath, webFilePath_syp, webFilePath_sypf);</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">MakeThumbnail(webFilePath, webFilePath_s, imageW, imageH, "Cut" ); // 生成缩略图方法</span>
<span style="font-size: 16px">Label1.Text = "提示：文件&ldquo;" + fileName + "&rdquo;成功上传，并生成&ldquo;" + fileName_s + "&rdquo;缩略图，文件类型为：" + FileUpload1.PostedFile.ContentType + "，文件大小为：" + FileUpload1.PostedFile.ContentLength + "B" ;</span>
<span style="font-size: 16px">Image1.ImageUrl = "/" + TextBox3.Text.ToString() + "/images/" + fileName;</span>
<span style="font-size: 16px">TextBox1.Text = webFilePath;</span>
<span style="font-size: 16px">TextBox2.Text = "/" + TextBox3.Text.ToString() + "/images/" + fileName;</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">catch (Exception ex)</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">Label1.Text = "提示：文件上传失败，失败原因：" + ex.Message;</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">else</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">Label1.Text = "提示：文件已经存在，请重命名后上传" ;</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">else</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">Label1.Text = "提示：文件类型不符" ;</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">/**/</span>
<span style="font-size: 16px">/// 〈summary></span>
<span style="font-size: 16px">/// 生成缩略图</span>
<span style="font-size: 16px">/// 〈/summary></span>
<span style="font-size: 16px">/// 〈param name="originalImagePath">源图路径（物理路径）〈/param></span>
<span style="font-size: 16px">/// 〈param name="thumbnailPath">缩略图路径（物理路径）〈/param></span>
<span style="font-size: 16px">/// 〈param name="width">缩略图宽度〈/param></span>
<span style="font-size: 16px">/// 〈param name="height">缩略图高度〈/param></span>
<span style="font-size: 16px">/// 〈param name="mode">生成缩略图的方式〈/param> </span>
<span style="font-size: 16px">public static void MakeThumbnail( string originalImagePath, string thumbnailPath, int width, int height, string mode)</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);</span>
<span style="font-size: 16px">int towidth = width;</span>
<span style="font-size: 16px">int toheight = height;</span>
<span style="font-size: 16px">int x = 0;</span>
<span style="font-size: 16px">int y = 0;</span>
<span style="font-size: 16px">int ow = originalImage.Width;</span>
<span style="font-size: 16px">int oh = originalImage.Height;</span>
<span style="font-size: 16px">switch (mode)</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">case "HW" : //指定高宽缩放（可能变形） </span>
<span style="font-size: 16px">break ;</span>
<span style="font-size: 16px">case "W" : //指定宽，高按比例 </span>
<span style="font-size: 16px">toheight = originalImage.Height * width / originalImage.Width;</span>
<span style="font-size: 16px">break ;</span>
<span style="font-size: 16px">case "H" : //指定高，宽按比例</span>
<span style="font-size: 16px">towidth = originalImage.Width * height / originalImage.Height;</span>
<span style="font-size: 16px">break ;</span>
<span style="font-size: 16px">case "Cut" : //指定高宽裁减（不变形） </span>
<span style="font-size: 16px">if (( double )originalImage.Width / ( double )originalImage.Height > ( double )towidth / ( double )toheight)</span>
<span style="font-size: 16px">{</span>
<p class="alt"><span style="font-size: 16px">oh = originalImage.Height;</span>
<span style="font-size: 16px">ow = originalImage.Height * towidth / toheight;</span>
<p class="alt"><span style="font-size: 16px">　y = 0;</span>
<span style="font-size: 16px">x = (originalImage.Width - ow) / 2;</span>
<p class="alt"><span style="font-size: 16px">}</span>
<p class="alt"><span style="font-size: 16px">else</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">ow = originalImage.Width;</span>
<span style="font-size: 16px">oh = originalImage.Width * height / towidth;</span>
<span style="font-size: 16px">x = 0;</span>
<span style="font-size: 16px">y = (originalImage.Height - oh) / 2;</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">break ;</span>
<span style="font-size: 16px">default :</span>
<span style="font-size: 16px">break ;</span>
<span style="font-size: 16px">}</span>
<p class="alt"><span style="font-size: 16px">//新建一个bmp图片</span>
<span style="font-size: 16px">System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);</span>
<p class="alt"><span style="font-size: 16px">//新建一个画板</span>
<span style="font-size: 16px">System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);</span>
<p class="alt"><span style="font-size: 16px">//设置高质量插值法</span>
<span style="font-size: 16px">g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;</span>
<p class="alt"><span style="font-size: 16px">//设置高质量,低速度呈现平滑程度</span>
<span style="font-size: 16px">g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;</span>
<p class="alt"><span style="font-size: 16px">//清空画布并以透明背景色填充</span>
<span style="font-size: 16px">g.Clear(System.Drawing.Color.Transparent);</span>
<p class="alt"><span style="font-size: 16px">//在指定位置并且按指定大小绘制原图片的指定部分</span>
<span style="font-size: 16px">g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight),</span>
<span style="font-size: 16px">new System.Drawing.Rectangle(x, y, ow, oh),</span>
<span style="font-size: 16px">System.Drawing.GraphicsUnit.Pixel);</span>
<p class="alt"><span style="font-size: 16px">try</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">//以jpg格式保存缩略图</span>
<span style="font-size: 16px">bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">catch (System.Exception e)</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">throw e;</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">finally</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">originalImage.Dispose();</span>
<span style="font-size: 16px">bitmap.Dispose();</span>
<span style="font-size: 16px">g.Dispose();</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">}</span>
<p class="alt"><span style="font-size: 16px">/**/</span>
<span style="font-size: 16px">/// 〈summary></span>
<span style="font-size: 16px">/// 在图片上增加文字水印</span>
<span style="font-size: 16px">/// 〈/summary></span>
<span style="font-size: 16px">/// 〈param name="Path">原服务器图片路径〈/param></span>
<span style="font-size: 16px">/// 〈param name="Path_sy">生成的带文字水印的图片路径〈/param></span>
<span style="font-size: 16px">protected void AddWater( string Path, string Path_sy)</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">string addText = "</span><a href="http://www.tzwhx.com/"><span style="font-size: 16px">www.tzwhx.com</span></a><span style="font-size: 16px">" ;</span>
<span style="font-size: 16px">System.Drawing.Image image = System.Drawing.Image.FromFile(Path);</span>
<span style="font-size: 16px">System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);</span>
<span style="font-size: 16px">g.DrawImage(image, 0, 0, image.Width, image.Height);</span>
<span style="font-size: 16px">System.Drawing.Font f = new System.Drawing.Font( "Verdana" , 10); //字体位置为左空10</span>
<span style="font-size: 16px">System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Green);</span>
<p class="alt"><span style="font-size: 16px">g.DrawString(addText, f, b, 14, 14); //字体大小为14X14</span>
<span style="font-size: 16px">g.Dispose();</span>
<p class="alt"><span style="font-size: 16px">image.Save(Path_sy);</span>
<span style="font-size: 16px">image.Dispose();</span>
<span style="font-size: 16px">}</span>
<p class="alt"><span style="font-size: 16px">/**/</span>
<span style="font-size: 16px">/// 〈summary></span>
<span style="font-size: 16px">/// 在图片上生成图片水印</span>
<span style="font-size: 16px">/// 〈/summary></span>
<span style="font-size: 16px">/// 〈param name="Path">原服务器图片路径〈/param></span>
<span style="font-size: 16px">/// 〈param name="Path_syp">生成的带图片水印的图片路径〈/param></span>
<span style="font-size: 16px">/// 〈param name="Path_sypf">水印图片路径〈/param></span>
<span style="font-size: 16px">protected void AddWaterPic( string Path, string Path_syp, string Path_sypf)</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">System.Drawing.Image image = System.Drawing.Image.FromFile(Path);</span>
<span style="font-size: 16px">System.Drawing.Image copyImage = System.Drawing.Image.FromFile(Path_sypf);</span>
<span style="font-size: 16px">System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);</span>
<span style="font-size: 16px">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);</span>
<span style="font-size: 16px">g.Dispose();</span>
<p class="alt"><span style="font-size: 16px">image.Save(Path_syp);</span>
<span style="font-size: 16px">image.Dispose();</span>
<span style="font-size: 16px">}</span>
<p class="alt"><span style="font-size: 16px">protected void Button2_Click( object sender, EventArgs e)</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">//自动保存远程图片</span>
<span style="font-size: 16px">WebClient client = new WebClient();</span>
<span style="font-size: 16px">//备用Reg:〈img.*?src=([\"\'])(http:\/\/.+\.(jpg|gif|bmp|bnp))\1.*?></span>
<span style="font-size: 16px">Regex reg = new Regex( "IMG[^>]*?src\\s*=\\s*(?:\"(?〈1>[^\"]*)\"|'(?〈1>[^\']*)')" , RegexOptions.IgnoreCase);</span>
<span style="font-size: 16px">MatchCollection m = reg.Matches(TextBox1.Text);</span>
<p class="alt"><span style="font-size: 16px">foreach (Match math in m)</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">string imgUrl = math.Groups[1].Value;</span>
<p class="alt"><span style="font-size: 16px">//在原图片名称前加YYMMDD重名名并上传</span>
<p class="alt"><span style="font-size: 16px">Regex regName = new Regex(@ "\w+.(?:jpg|gif|bmp|png)" , RegexOptions.IgnoreCase);</span>
<p class="alt"><span style="font-size: 16px">string strNewImgName = DateTime.Now.ToShortDateString().Replace( "-" , "" ) + regName.Match(imgUrl).ToString();</span>
<p class="alt"><span style="font-size: 16px">try</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">//保存图片</span>
<span style="font-size: 16px">//client.DownloadFile(imgUrl, Server.MapPath("../ImageUpload/Auto/" + strNewImgName));</span>

<span style="font-size: 16px">}</span>
<span style="font-size: 16px">catch</span>
<span style="font-size: 16px">{</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">finally</span>
<span style="font-size: 16px">{</span>
<p class="alt"><span style="font-size: 16px">}</span>
<p class="alt"><span style="font-size: 16px">client.Dispose();</span>
<span style="font-size: 16px">}</span>
<p class="alt"><span style="font-size: 16px">Response.Write( "〈script>alert('远程图片保存成功，保存路径为ImageUpload/auto')〈/script>" );</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">}</span>
<span style="font-size: 16px">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。</span>
<p class="alt"><span style="font-size: 16px">< system.web></span>
<span style="font-size: 16px">< httpRuntime executionTimeout= "90" maxRequestLength= "20000" useFullyQualifiedRedirectUrl= "false" requestLengthDiskThreshold= "8192" /></span>
<span style="font-size: 16px">< /system.web></span>

</div>
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