最近写了一个小项目需要上传文件显示进度条到ftp，总结一下分享
我用的是jQuery.form.js上传
ftp服务器，自己百度去搭建很简单的
Talk is cheap.Show me your code.
GitHub上面的源码：https://github.com/Vinkong/learngit
aspx页面
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<script src="jquery-3.4.1.min.js"></script>
<script src="jquery.form.js"></script>
<style>
.hidden{display:none;}
.upload-fileWrap {
margin: 3px 0 0 -2px;
position: relative;
}
.upload-input-file {
position: absolute;
left: 2px;
top: 0;
display: inline-block;
88px;
height: 34px;
line-height: 34px;
opacity: 0;
cursor: pointer;
z-index: 2;
}
.upload-file-result {
color: #a1acc6;
font-size: 14px;
}
/*进度条*/
.progressWrap {
position: absolute;
right: 20px;
top: 56px;
200px;
height: 10px;
}
.progress {
100%;
height: 20px;
background: #0f1529;
-webkit-border-radius: 20px;
-moz-border-radius: 20px;
border-radius: 20px;
overflow: hidden;
}
.progress-bar {
height: 20px;
background: url("blue.jpg") repeat-x;
}
.progress-bar span {
position: absolute;
color: #58637e;
font-size: 12px;
line-height: 18px;
}
.progress-bar span.progress-bar-status {
left: 50%;
top: -23px;
margin-left: -15px;
color: #1cc3b0;
}
.upload-file-stateWrap {
position: relative;
100%;
height: auto;
}
.upload-file-stateWrap .progress {
60%;
}
.upload-file-stateWrap span.progress-bar-status {
top: inherit;
bottom: -3px;
left: 60%;
margin-left: 5px;
}
</style>
<script>
function addfile() {
var progress = $(".progress-bar"),
status = $(".progress-bar-status"),
percentVal = '0%';
//上传步骤
var addvediofile = "";
var filePath =$('#upload-input-file').val();
var startIndex = filePath.lastIndexOf(".");
if (startIndex != -1)
addvediofile = filePath.substring(startIndex + 1, filePath.length).toLowerCase();
else
type = "";
if (addvediofile != "mp4" && addvediofile != "rmvb" && addvediofile != "avi" && addvediofile != "ts") {
alert("文件格式不对");
$('#upload-input-file').val("");//介绍视频
return;
}
var size = 0;
size = $("#upload-input-file")[0].files[0].size; //byte
size = size / 1024;//kb
size = (size / 1024).toFixed(3);//mb
if (size > 100) {
alert("文件超过100M,无法上传");
return;
}
$("#myupload").ajaxSubmit({
url: './ashx/Handler.ashx',
type: "post",
beforeSend: function () {
$(".progress").removeClass("hidden");
progress.width(percentVal);
status.html(percentVal);
},
uploadProgress: function (event, position, total, percentComplete) {
percentVal = percentComplete + '%';
progress.width(percentVal);
status.html(percentVal);
console.log(percentVal, position, total);
},
success: function (result) {
//alert(result);
percentVal = '100%';
progress.width(percentVal);
status.html(percentVal);
////获取上传文件信息
alert("上传成功");
//uploadFileResult.push(result);
//// console.log(uploadFileResult);
$(".upload-file-result").html(result);
$("#upload-input-file").val('');
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
console.log(errorThrown);
$(".upload-file-result").empty();
}
});
}
</script>
</head>
<body>
<div class="upload-fileWrap">
<form id='myupload' name='myupload' enctype='multipart/form-data'>
<input id="upload-input-file" class="" name="file" type="file" data-value-update="input"/>
<input type="button" onclick="addfile();" value="提交"/>
</form>
<div class="upload-file-stateWrap">
<div style="margin-top:100px;"> <span class="upload-file-result"></span> </div>
<div class="progress hidden">
<div class="progress-bar" role="progressbar" aria-valuemin="0" aria-valuemax="100" style=" 0%;">
<span class="progress-bar-status">0%</span>
</div>
</div>
</div>
</div>
</body>
</html>
一般处理程序文件
1 <%@ WebHandler Language="C#" Class="Handler" %> 2 3 using System; 4 using System.Web; 5 using System.Collections.Generic; 6 using System.IO; 7 using System.Linq; 8 using System.Net; 9 using System.Web; 10 public class Handler : IHttpHandler { 11 12 public void ProcessRequest (HttpContext context) { 13 context.Response.ContentType = "text/plain"; 14 15 string ftpUserID ="kfz"; 16 string ftpServerIP = "192.168.0.102"; 17 string ftpPassword ="kfz123456"; 18 string ftpRemotePath ="test"; 19 20 string ftpURI = "ftp://" + ftpServerIP + "/" + ftpRemotePath + "/"; 21 HttpFileCollection files = context.Request.Files; 22 23 if (files.Count > 0) 24 { 25 HttpPostedFile fileInf = files[0]; 26 FtpWebRequest reqFTP; 27 reqFTP = (FtpWebRequest)FtpWebRequest.Create(new Uri(ftpURI + fileInf.FileName)); 28 reqFTP.Credentials = new NetworkCredential(ftpUserID, ftpPassword); 29 reqFTP.Method = WebRequestMethods.Ftp.UploadFile; 30 reqFTP.KeepAlive = false; 31 reqFTP.UseBinary = true; 32 reqFTP.ContentLength = fileInf.ContentLength; 33 int buffLength = 2048; 34 byte[] buff = new byte[buffLength]; 35 int contentLen; 36 Stream fs = fileInf.InputStream; 37 try 38 { 39 Stream strm = reqFTP.GetRequestStream(); 40 contentLen = fs.Read(buff, 0, buffLength); 41 while (contentLen != 0) 42 { 43 strm.Write(buff, 0, contentLen); 44 contentLen = fs.Read(buff, 0, buffLength); 45 } 46 strm.Close(); 47 fs.Close(); 48 context.Response.Write(fileInf.FileName); 49 } 50 catch (Exception ex) 51 { 52 throw new Exception(ex.Message); 53 } 54 } 55 56 57 } 58 59 public bool IsReusable { 60 get { 61 return false; 62 } 63 } 64 65 }
说一下我遇到的一些问题，首先我遇到了一开始怎么都触发不了异步，无法进入一般处理程序，但是通过前端调试，可以看到触发了uploadProgress回调函数，最后发现是文件太大了，需要配置webconfig,可以根据自己的需求来配置
<?xml version="1.0" encoding="utf-8"?>
<!--
有关如何配置 ASP.NET 应用程序的详细信息，请访问
http://go.microsoft.com/fwlink/?LinkId=169433
-->
<configuration>
<system.web>
<compilation debug="true" targetFramework="4.5" />
<httpRuntime requestValidationMode="2.0" maxRequestLength="2097151" executionTimeout="36000" />
</system.web>
<system.webServer>
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="102400000" />
</requestFiltering>
</security>
</system.webServer>
</configuration>
如果你发布到iis中运行，也需要去iis管理器去配置编辑器中设置，默认只能上传30M,这个怎么配置，我也是百度的，自己可以尝试一下。