<!--enctype="multipart/form-data":如果要上传文件必须加上该属性，指定相应的编码。只有这样用户选择的文件数据（文件流）才会放在请求报文中，发送给服务器。表单中的其它表单元素（文本框等），也会发送到服务端，但是格式也变了，但是在服务端还是按照以前的方式进行接收--> <!--如果表单不需要上传文件就不用加enctype---> <form method="post" action="ProcessFileUp.ashx" enctype="multipart/form-data"> <input type="file" name="fileUp"/> <input type="text" name="txtName" /> <input type="submit" value="上传" /> </form>
ashx
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.IO; namespace CZBK.ItcastProject.WebApp._2015_5_27 { /// <summary> /// ProcessFileUp 的摘要说明 /// </summary> public class ProcessFileUp : IHttpHandler { public void ProcessRequest(HttpContext context) { context.Response.ContentType = "text/html"; HttpPostedFile file=context.Request.Files[0];//获取上传的文件. if (file.ContentLength>0) { //对上传的文件类型进行校验。 string fileName =Path.GetFileName(file.FileName);//获取上传文件的名称包含扩展名。 string fileExt = Path.GetExtension(fileName);//获取用户上传的文件扩展名。 if (fileExt == ".jpg") { //1.对上传文件进行重命名？ string newfileName = Guid.NewGuid().ToString(); //2:将上传的文件放在不同的目录下面? string dir = "/ImageUpload/"+DateTime.Now.Year+"/"+DateTime.Now.Month+"/"+DateTime.Now.Day+"/"; //创建文件夹 if (!Directory.Exists(context.Request.MapPath(dir))) { Directory.CreateDirectory(context.Request.MapPath(dir)); } string fullDir = dir + newfileName + fileExt;//文件存放的完整路径。 file.SaveAs(context.Request.MapPath(fullDir)); // file.SaveAs(context.Request.MapPath("/ImageUpload/"+fileName));//完成文件的保存。 context.Response.Write("<html><body><img src='"+fullDir+"'/></body></html>"); } else { context.Response.Write("只能上传图片文件"); } } else { context.Response.Write("请选择上传文件"); } } public bool IsReusable { get { return false; } } } }
protected void Page_Load(object sender, EventArgs e) { HttpPostedFile jpeg_image_upload = Request.Files["Filedata"]; string imageId =DateTime.Now.Ticks.ToString(); string fileName = Path.GetFileName(jpeg_image_upload.FileName); string fileExtension = Path.GetExtension(fileName); string uploadName = imageId + fileExtension; if (jpeg_image_upload.ContentLength > 0) { string imageUrl = Server.MapPath("/UpLoadPic/Product/" + DateTime.Now.ToString("yyyyMM") + "/" + uploadName); if (!Directory.Exists(Path.GetDirectoryName(imageUrl))) { Directory.CreateDirectory(Path.GetDirectoryName(imageUrl)); } jpeg_image_upload.SaveAs(imageUrl); //保存大图并水印 string bigimg = Server.MapPath("/UpLoadPic/Product/" + DateTime.Now.ToString("yyyyMM") + "/c" + uploadName); if (!Directory.Exists(Path.GetDirectoryName(bigimg))) { Directory.CreateDirectory(Path.GetDirectoryName(bigimg)); } NCurrtImg.GreateMiniImage(imageUrl, bigimg, 600, 600, "COM");//生成缩略图 //CurrtImg.addWaterMark(tempimg, bigimg, "I");//水印 //保存中图 string midimg = Server.MapPath("/UpLoadPic/Product/" + DateTime.Now.ToString("yyyyMM") + "/m" + uploadName); if (!Directory.Exists(Path.GetDirectoryName(midimg))) { Directory.CreateDirectory(Path.GetDirectoryName(midimg)); } NCurrtImg.GreateMiniImage(imageUrl, midimg, 200, 200, "COM");//生成缩略图 //保存小图 string smallimg = Server.MapPath("/UpLoadPic/Product/" + DateTime.Now.ToString("yyyyMM") + "/s" + uploadName); if (!Directory.Exists(Path.GetDirectoryName(smallimg))) { Directory.CreateDirectory(Path.GetDirectoryName(smallimg)); } NCurrtImg.GreateMiniImage(imageUrl, smallimg, 33, 33, "COM");//生成缩略图 Response.StatusCode = 200; string returnStr = jpeg_image_upload.ContentLength.ToString();//0 size returnStr = returnStr + "|" + "/UpLoadPic/Product/" + DateTime.Now.ToString("yyyyMM") + "/m" + uploadName;//1 url returnStr = returnStr + "|" + fileName; //2 title returnStr = returnStr + "|" + imageId; //3 id returnStr = returnStr + "|" + "wokaokao"; //4 name Response.Write(returnStr); Response.End(); } }
public void UpImg(JTZK_ProductModel Model) { HttpPostedFile file = Request.Files["PicUrl"]; if (file == null) { // return ... } else { string fileName = System.IO.Path.GetFileName(file.FileName); string fileExtension = System.IO.Path.GetExtension(fileName); string uploadName = Guid.NewGuid() + fileExtension; string dir = "/UpLoadPic/Product/" + DateTime.Now.ToString("yyyyMM"); string imgpath = dir + "/c" + uploadName; Model.PicUrl = imgpath; System.IO.Directory.CreateDirectory(Server.MapPath(dir));//创建文件夹. imgpath = Server.MapPath(imgpath); file.SaveAs(imgpath); string smallimg = ""; string midimg = ""; smallimg = Server.MapPath(dir + "/s" + uploadName); NCurrtImg.GreateMiniImage(imgpath, smallimg, 100, 100, "Cut"); midimg = Server.MapPath(dir + "/m" + uploadName); NCurrtImg.GreateMiniImage(imgpath, midimg, 300, 300, "Cut"); } }
如果失败 考虑权限问题 和路径问题 在 saveAs前一定要创建路径
#region 文件上传 public ActionResult FileUpload() { HttpPostedFileBase postFile = Request.Files["fileUp"];//接收文件数据 if (postFile == null) { return Content("no:请选择上传文件"); } else { string fileName = Path.GetFileName(postFile.FileName);//文件名称 string fileExt = Path.GetExtension(fileName);//文件的扩展名称. if (fileExt == ".jpg") { string dir = "/ImagePath/" + DateTime.Now.Year + "/" + DateTime.Now.Month + "/" + DateTime.Now.Day + "/"; Directory.CreateDirectory(Path.GetDirectoryName(Request.MapPath(dir)));//创建文件夹. string newfileName = Guid.NewGuid().ToString();//新的文件名称. string fullDir = dir + newfileName + fileExt;//完整的路径. postFile.SaveAs(Request.MapPath(fullDir));//保存文件. return Content("ok:" + fullDir); } else { return Content("no:文件格式错误!!"); } } } #endregion