C#通过form表单上传图片

 

 1 <head>
 2     <title>图片上传</title>
 3     <script src="../Scripts/jquery-1.7.1.js"></script>
 4     <script type="text/javascript">
 5         $(function () {
 6             $(":file").change(function(){
 7                 //  alert("change");
 8 
 9                 //拿到文件名
10                 // alert($(this).val());
11 
12                 //获取后缀
13                 var fileName = $(this).val();
14                 var ext = fileName.substr(fileName.lastIndexOf('.'));
15                 if (ext ==".jpg" || ext==".jpeg" || ext==".png" || ext ==".gif") {
16                     return true
17                 } else {
18                     //清空选中文件
19                     $(this).val("");
20                     alert("请选择正确文件");
21                 } 
22             });
23              
24         });
25 
26     </script> 
27 
28 </head>
29 <body>
30     <form action="ImageUpload.ashx" method="post" enctype="multipart/form-data">
31 
32         <input type="file" name="imgFile"   />
33         <input type="submit" name="name" value="上传 " />
34 
35     </form>
36     <!--<form action="ImageUpload.ashx" method="post">
37         <input type="text" name="txtName" value=" " />
38         <input type="submit"    name="name" value="提交 " />
39 
40     </form>-->
41 </body>

 

 1    context.Response.ContentType = "text/html";
 2 
 3             //拿到上传的文件
 4             HttpPostedFile file = context.Request.Files["imgFile"];
 5 
 6             //后台也要校验
 7             string ext = file.FileName.Substring(file.FileName.LastIndexOf("."));
 8 
 9             if (!(ext == ".jpg" || ext == ".jpeg" || ext == ".png" || ext == ".gif"))
10             {
11                 //不是图片的时候
12                 context.Response.Write("shit");
13                 context.Response.End();
14 
15 
16             }
17             else
18             {
19                 string path = "/Upload/" + Guid.NewGuid() + file.FileName;
20 
21                 file.SaveAs(context.Request.MapPath(path));
22 
23                 string str = string.Format("<html><head></head><body><img  src='{0}'/></body></html>", path);
24 
25                 context.Response.Write(str);
26             }

 

  

posted @ 2017-04-19 11:58  王小二不在家  阅读(1125)  评论(0)    收藏  举报