我写的上传(upload)文件的codebehind代码(1gdt)
点击次数：13 次 发布日期：2008-11-27 01:22:13 作者：源代码网
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1。把图片文件(JPG GIF PNG)上传， 2。保存到指定的路径（在web.config中设置路径，以文件的原有格式保存）， 3。并自动生成指定宽度的（在web.config中设置宽度） 4。和指定格式的（在web.config中指定缩略图的格式） 5。和原图比例相同的缩略图(根据宽度和原图的宽和高计算所略图的高度) 6。可以判断是否已经存在文件 7。如果不覆盖，则给出错误 8。如果选中"覆盖原图"checkbox，则覆盖原图。 9。可以根据要求，在webform上设置1个以上的file input和相应的checkbox 10。并在文件上传完毕后，显示原图的文件名，尺寸，字节，和 11。缩略图的文件名尺寸。 12。缩略图的文件名格式：原图+"_thumb."+指定格式，如：test.jpg_thumb.gif,以便于管理。 -------------------- public void UploadFile(object sender, System.EventArgs e) { string imgNameOnly, imgNameNoExt, imgExt; string imgThumbnail; int erroNumber = 0; System.Drawing.Image oriImg, newImg; StringBuilder picInfo = new StringBuilder(); if(Page.IsValid) { for(int i = 0;i < Request.Files.Count; i++) { HttpPostedFile PostedFile = Request.Files[i]; string fileExt = (System.IO.Path.GetExtension(PostedFile.FileName)).ToString().ToLower(); imgNameOnly = System.IO.Path.GetFileName(PostedFile.FileName); if(fileExt == ".jpg" || fileExt == ".gif" || fileExt == ".png") { if(System.IO.File.Exists(ConfigurationSettings.AppSettings["FePicSavePath"]+ imgNameOnly) && (checkboxlistRewrite.Items[i].Selected == false)) { erroNumber = erroNumber + 1; picInfo.Append("<b>错误：</b>文件("+ (i+1) +") " + imgNameOnly + " 已经存在，请修改文件名<br>" ); } } else { erroNumber = erroNumber + 1; picInfo.Append("<b>错误：</b>文件("+ (i+1) +") " + imgNameOnly + " 扩展名 " + fileExt + " 不被许可<br>" ); } } if(erroNumber > 0) { picInfo.Append("<font color=red>全部操作均未完成，请修改错误，再进行操作</font><br>"); } else { for(int i = 0;i < Request.Files.Count; i++) { HttpPostedFile PostedFile = Request.Files[i]; imgNameOnly = System.IO.Path.GetFileName(PostedFile.FileName); imgNameNoExt = System.IO.Path.GetFileNameWithoutExtension(PostedFile.FileName); imgExt = System.IO.Path.GetExtension(PostedFile.FileName).ToString().ToLower(); oriImg = System.Drawing.Image.FromStream(PostedFile.InputStream); newImg = oriImg.GetThumbnailImage(Int32.Parse(ConfigurationSettings.AppSettings["FePicThumbWidth"]),Int32.Parse(ConfigurationSettings.AppSettings["FePicThumbWidth"])*oriImg.Height/oriImg.Width,null,new System.IntPtr(0)); switch(imgExt) { //case ".jpeg": case ".jpg": oriImg.Save(ConfigurationSettings.AppSettings["FePicSavePath"] + imgNameOnly , System.Drawing.Imaging.ImageFormat.Jpeg); break; case ".gif": oriImg.Save(ConfigurationSettings.AppSettings["FePicSavePath"] + imgNameOnly , System.Drawing.Imaging.ImageFormat.Gif); break; case ".png": oriImg.Save(ConfigurationSettings.AppSettings["FePicSavePath"] + imgNameOnly , System.Drawing.Imaging.ImageFormat.Png); break; } //oriImg.Save(ConfigurationSettings.AppSettings["FePicSavePath"] + imgNameNoExt + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg); switch(ConfigurationSettings.AppSettings["FePicThumbFormat"].ToString().ToLower()) { //jpeg format can get the smallest file size, and the png is the largest size //case "jpeg": case "jpg": newImg.Save(ConfigurationSettings.AppSettings["FePicSavePath"] + imgNameOnly + "_thumb.jpg",System.Drawing.Imaging.ImageFormat.Jpeg); imgThumbnail = imgNameOnly + "_thumb.jpg"; break; case "gif": newImg.Save(ConfigurationSettings.AppSettings["FePicSavePath"] + imgNameOnly + "_thumb.gif",System.Drawing.Imaging.ImageFormat.Gif); imgThumbnail = imgNameOnly + "_thumb.gif"; break; case "png": newImg.Save(ConfigurationSettings.AppSettings["FePicSavePath"] + imgNameOnly + "_thumb.png",System.Drawing.Imaging.ImageFormat.Png); imgThumbnail = imgNameOnly + "_thumb.png"; break; default: newImg.Save(ConfigurationSettings.AppSettings["FePicSavePath"] + imgNameOnly + "_thumb.jpg",System.Drawing.Imaging.ImageFormat.Jpeg); imgThumbnail = imgNameOnly + "_thumb.jpg"; break; }//switch picInfo.Append("<b>文件 名：</b>" + imgNameOnly + " ( " + oriImg.Width + " x " + oriImg.Height + " ) " + PostedFile.ContentLength/1024 + "KB<br>"); picInfo.Append("<b>缩略图名：</b>" + imgThumbnail + " ( " + newImg.Width + " x " + newImg.Height + " )<br><br>"); oriImg.Dispose(); newImg.Dispose(); }//for picInfo.Append("<font color=red>所有操作成功</font><br>"); }// if erronumber = 0 } else { picInfo.Append("<font color=red>有错误，请检查。操作未成功</font><br>"); } lblPicInfo.Text = picInfo.ToString(); &nb  源代码网供稿. |
