文件上传

1. 普通文件上传

View Code 
1     <form id="form1" action="UploadTest1.aspx"  method="post" enctype="multipart/form-data">
2         <input name="Action" value="From" type="hidden"/>
3         <input type="file" name="file" /> <br />
4         <input type="submit" value="提交"  />
5     </form>
View Code 
 1     protected void Page_Load(object sender, EventArgs e)
 2     {
 3         string action = Request.Form.Get("Action");
 4         if (action == "From")
 5         {
 6             string test = Request["aaa"];
 7             HttpPostedFile file = Request.Files.Get(0);
 8             //Response.Write(file.FileName);
 9             //Response.Write(file.ContentLength);
10             byte[] buffer = new byte[1024];
11             string content = string.Empty;
12             file.SaveAs(Server.MapPath("~/data/") + file.FileName);
13             //using (Stream stream = file.InputStream)
14             //{
15             //    using (MemoryStream memory = new MemoryStream())
16             //    {
17             //        int n = file.InputStream.Read(buffer, 0, 1024);
18             //        while (n > 0)
19             //        {
20             //            memory.Write(buffer, 0, n);
21             //            n = file.InputStream.Read(buffer, 0, 1024);
22             //        }
23             //        content = Encoding.Default.GetString(memory.ToArray());
24             //    }
25             //}
26             //Response.Write(content);
27 
28         }
29     }

2 asp.net 服务器控件上传

View Code 
1     <form id="form1" runat="server">
2     <div>
3         <asp:FileUpload ID="FileUpLoad1" runat="server" />
4         <br />
5         <asp:Button ID="btnFileUpload" runat="server" OnClick="btnFileUpload_Click" Text="文件上传"
6             OnClientClick="return checkType()" />
7         <asp:Label ID="lblMessage" runat="server"></asp:Label>
8     </div>
9     </form>
View Code 
 1  //文件上传按钮click事件  
 2     protected void btnFileUpload_Click(object sender, EventArgs e)
 3     {
 4         if (FileUpLoad1.HasFile)
 5         {
 6             //判断文件是否小于10Mb  
 7             if (FileUpLoad1.PostedFile.ContentLength < 10485760)
 8             {
 9                 try
10                 {
11                     //上传文件并指定上传目录的路径  
12                     FileUpLoad1.PostedFile.SaveAs(Server.MapPath("~/data/")
13                         + FileUpLoad1.FileName);
14                     /*注意->这里为什么不是:FileUpLoad1.PostedFile.FileName 
15                     * 而是:FileUpLoad1.FileName? 
16                     * 前者是获得客户端完整限定(客户端完整路径)名称 
17                     * 后者FileUpLoad1.FileName只获得文件名. 
18                     */
19 
20                     //当然上传语句也可以这样写(貌似废话):  
21                     //FileUpLoad1.SaveAs(@"D:\"+FileUpLoad1.FileName);  
22 
23                     lblMessage.Text = "上传成功!";
24                 }
25                 catch (Exception ex)
26                 {
27                     lblMessage.Text = "出现异常,无法上传!";
28                     //lblMessage.Text += ex.Message;  
29                 }
30 
31             }
32             else
33             {
34                 lblMessage.Text = "上传文件不能大于10MB!";
35             }
36         }
37         else
38         {
39             lblMessage.Text = "尚未选择文件!";
40         }
41     }

3 利用iframe 无刷新上传

View Code 
 1 <html xmlns="http://www.w3.org/1999/xhtml">
 2 <head runat="server">
 3     <script src="Script/jquery-1.4.1.js" type="text/javascript"></script>
 4     <title></title>
 5 </head>
 6 <body>
 7     <div id="msg"></div>
 8     <form id="form1" action="Handler/Upload3Handler.ashx" method="post" enctype="multipart/form-data" target="hidden_frame">
 9     <input name="Action" value="From" type="hidden" />
10     <input type="file" name="file" />
11     <br />
12     <input type="submit" value="提交"  />
13     </form>
14     <iframe name="hidden_frame" id="hidden_frame" style="display: none"></iframe>
15     <a href="UploadTest1.aspx" target="view_window">123</a>
16 </body>
17 </html>
18 <script type="text/javascript">
19     function callback(msg) {
20         document.getElementById("msg").innerHTML = "<font color=red>" + msg + "</font>";
21     }   
22 </script>
View Code 
 1         HttpPostedFile file = context.Request.Files.Get(0);
 2         //Response.Write(file.FileName);
 3         //Response.Write(file.ContentLength);
 4         byte[] buffer = new byte[1024];
 5         string content = string.Empty;
 6         file.SaveAs(context.Server.MapPath("~/data/") + file.FileName);
 7         //using (Stream stream = file.InputStream)
 8         //{
 9         //    using (MemoryStream memory = new MemoryStream())
10         //    {
11         //        int n = file.InputStream.Read(buffer, 0, 1024);
12         //        while (n > 0)
13         //        {
14         //            memory.Write(buffer, 0, n);
15         //            n = file.InputStream.Read(buffer, 0, 1024);
16         //        }
17         //        content = Encoding.Default.GetString(memory.ToArray());
18         //    }
19         //}
20         //Response.Write(content);
21         context.Response.Write(string.Format("<script>parent.callback('fileName: {0} size :{1}')</script>", file.FileName, file.ContentLength));
22         context.Response.End();

4 简单的swfUpload 上传

View Code 
 1 <html xmlns="http://www.w3.org/1999/xhtml">
 2 <head runat="server">
 3     <link href="Script/Util/swfupload/js/default.css" rel="stylesheet" type="text/css" />
 4     <script src="Script/Util/swfupload/js/swfupload.js" type="text/javascript"></script>
 5     <script src="Script/Util/swfupload/js/swfupload.queue.js" type="text/javascript"></script>
 6     <script src="Script/Util/swfupload/js/fileprogress.js" type="text/javascript"></script>
 7     <script src="Script/Util/swfupload/js/handlers.js" type="text/javascript"></script>
 8     <title></title>
 9 </head>
10 <body>
11     <div id="content">
12         <form id="form1" action="UploadTest5.aspx" method="post" enctype="multipart/form-data">
13         <div class="fieldset flash" id="fsUploadProgress">
14         </div>
15         <div id="divStatus">
16         </div>
17         <div>
18             <span id="spanButtonPlaceHolder"></span>
19             <input id="btnCancel" type="button" value="取消上传" onclick="swfu.cancelQueue();" disabled="disabled"
20                 style="margin-left: 2px; font-size: 8pt; height: 29px;" />
21         </div>
22         <input type="submit" value="提交" />
23         </form>
24     </div>
25 </body>
26 </html>
27 <script type="text/javascript">
28     var swfu;
29 
30     window.onload = function () {
31         var settings = {
32             flash_url: "Script/Util/swfupload/js/swfupload.swf",
33             upload_url: "Handler/Upload3Handler.ashx",
34             post_params: { "param": "参数" },
35             file_size_limit: "800 MB",
36             file_types: "*.*",
37             file_types_description: "All Files",
38             file_upload_limit: 100,
39             file_queue_limit: 0,
40             custom_settings: {
41                 progressTarget: "fsUploadProgress",
42                 cancelButtonId: "btnCancel"
43             },
44             debug: false,
45 
46             // Button settings
47             button_image_url: "Script/Util/swfupload/images/TestImageNoText_65x29.png",
48             button_ "65",
49             button_height: "29",
50             button_placeholder_id: "spanButtonPlaceHolder",
51             button_text: '<span class="theFont">Hello</span>',
52             button_text_style: ".theFont { font-size: 16; }",
53             button_text_left_padding: 12,
54             button_text_top_padding: 3,
55 
56             // The event handler functions are defined in handlers.js
57             file_queued_handler: fileQueued,
58             file_queue_error_handler: fileQueueError,
59             file_dialog_complete_handler: fileDialogComplete,
60             upload_start_handler: uploadStart,
61             upload_progress_handler: uploadProgress,
62             upload_error_handler: uploadError,
63             upload_success_handler: uploadSuccess,
64             upload_complete_handler: uploadComplete
65             // queue_complete_handler: queueComplete    // Queue plugin event
66         };
67 
68         swfu = new SWFUpload(settings);
69     };
70 
71 
72 </script>

5 swfUpload 同步显示图片的上传

https://code.google.com/p/swfupload/downloads/list

备注:在web.config 设置文件上传限制

<httpRuntime maxRequestLength="2097151" executionTimeout="3600"/>

swfUpload dome

http://demo.swfupload.org/v220/

swfUpload 文档

http://www.leeon.me/upload/other/swfupload.html

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原文地址：https://www.cnblogs.com/zhanhengzong/p/2805597.html