asp.net jquery 进度条上传
时间: 2023-05-15 07:01:42 浏览: 83
ASP.NET jQuery进度条上传是一种常见的网页上传文件功能。通过前端jQuery插件和后端ASP.NET技术,实现了文件上传过程中的进度条展示,提高了用户体验和操作效率。具体实现方式如下:
1. 前端实现
使用jQuery的ajaxForm插件,结合jQueryUI的progressbar插件,进行文件上传进度条的展示。在HTML页面上添加上传表单和进度条,通过ajaxForm设置表单提交事件,实现文件上传过程中进度条的实时更新。代码如下:
```
<form id="uploadForm" enctype="multipart/form-data" method="post" action="UploadFile.ashx">
<input type="file" name="fileUpload" />
<input type="submit" value="上传" />
</form>
<div id="progressBar"></div>
```
```
$("#uploadForm").ajaxForm({
beforeSend: function() {
$("#progressBar").progressbar({
value: 0
});
},
uploadProgress: function(event, position, total, percentComplete) {
$("#progressBar").progressbar({
value: percentComplete
});
},
success: function() {
$("#progressBar").progressbar({
value: 100
});
alert("上传成功!");
},
error: function() {
alert("上传失败!");
}
});
```
2. 后端实现
在ASP.NET中,通过HttpHandler实现文件上传处理,从request对象中获取上传的文件信息,根据文件大小和上传进度,实时更新进度条的值。代码如下:
```
<%@ WebHandler Language="C#" Class="UploadFile" %>
using System;
using System.Web;
public class UploadFile : IHttpHandler {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "text/plain";
HttpPostedFile file = context.Request.Files["fileUpload"];
int fileSize = file.ContentLength;
int bytesRead = 0;
byte[] buffer = new byte[8192];
using (System.IO.Stream stream = file.InputStream)
using (System.IO.BinaryReader reader = new System.IO.BinaryReader(stream))
using (System.IO.MemoryStream ms = new System.IO.MemoryStream())
{
double percentComplete = 0;
int totalRead = 0;
while ((bytesRead = reader.Read(buffer, 0, buffer.Length)) > 0)
{
ms.Write(buffer, 0, bytesRead);
totalRead += bytesRead;
percentComplete = (double)totalRead / fileSize * 100;
context.Response.Write(percentComplete.ToString());
}
}
}
public bool IsReusable {
get {
return false;
}
}
}
```
综上,ASP.NET jQuery进度条上传,通过前后端技术的组合应用,在网页上传过程中有效展示文件上传进度和结果,提升了用户的体验感和操作效率。