您的位置: 旅游网 > 女人

在ASP.NET中上传图片并生成缩略图的C#源码(二)

发布时间:2019-09-13 20:05:01

public void UploadFile(object sender, System.EventArgs e)

{

string imgNameOnly, imgNameNoExt, imgExt;string imgThumbnail;int erroNumber = 0;System.Drawing.Image oriImg, newImg;string strFePicSavePath = ConfigurationSettings.AppSettings["FePicSavePath"].ToString();string strFePicThumbFormat = ConfigurationSettings.AppSettings["FePicThumbFormat"].ToString()。ToLower();int intFeThumbWidth = Int32.Parse(ConfigurationSettings.AppSettings["FePicThumbWidth"]);string fileExt;

StringBuilder picInfo = new StringBuilder();

if(Page.IsValid)

{

for(int i = 0;i < Request.Files.Count; i++)

{ HttpPostedFile PostedFile = Request.Files[i];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(strFePicSavePath + 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(intFeThumbWidth, intFeThumbWidth * oriImg.Height/oriImg.Width,null,new System.IntPtr(0));switch(imgExt)

{ //case ".jpeg":case ".jpg":oriImg.Save(strFePicSavePath + imgNameOnly , System.Drawing.Imaging.ImageFormat.Jpeg);break;case ".gif":oriImg.Save(strFePicSavePath + imgNameOnly , System.Drawing.Imaging.ImageFormat.Gif);break;case ".png":oriImg.Save(strFePicSavePath + imgNameOnly , System.Drawing.Imaging.ImageFormat.Png);break;}

//oriImg.Save(ConfigurationSettings.AppSettings["FePicSavePath"] + imgNameNoExt + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);

switch(strFePicThumbFormat)

{ //jpeg format can get the smallest file size, and the png is the largest size //case "jpeg":case "jpg":newImg.Save(strFePicSavePath + imgNameOnly + "_thumb.jpg",System.Drawing.Imaging.ImageFormat.Jpeg);imgThumbnail = imgNameOnly + "_thumb.jpg";break;case "gif":newImg.Save(strFePicSavePath + imgNameOnly + "_thumb.gif",System.Drawing.Imaging.ImageFormat.Gif);imgThumbnail = imgNameOnly + "_thumb.gif";break;case "png":newImg.Save(strFePicSavePath + imgNameOnly + "_thumb.png",System.Drawing.Imaging.ImageFormat.Png);imgThumbnail = imgNameOnly + "_thumb.png";break;default:newImg.Save(strFePicSavePath + 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();

} </FONT>

查看本文来源

宝宝严重便秘
糖尿病胃轻瘫便秘的治疗方法
9个月宝宝发烧怎么处理
小孩子咳嗽发烧怎么办
猜你会喜欢的
猜你会喜欢的