asp.net文件上传带进度条实现案例（多种风格）

先饱饱眼福：

在之前的文章中也有类似带进度条文件传送的案例，大家可以翻阅之前的文章对知识点进行扩充。

部分代码：

<%@ Page Language="C#" %>
<%@ Register Assembly="MattBerseth.WebControls.AJAX" Namespace="MattBerseth.WebControls.AJAX.Progress" TagPrefix="mb" %> 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
 <title>Untitled Page</title>
 <link rel="Stylesheet" href="_assets/css/progress.css" mce_href="_assets/css/progress.css" />
 <link rel="Stylesheet" href="_assets/css/upload.css" mce_href="_assets/css/upload.css" />
 <mce:style type="text/css"><!--
 BODY{ font-family:Arial, Sans-Serif; font-size:12px;} 

--></mce:style><style type="text/css" mce_bogus="1"> BODY{ font-family:Arial, Sans-Serif; font-size:12px;}
 </style>
 <mce:script type="text/C#" runat="server"><!-- 

 protected void Page_Load(object sender, EventArgs args)
 {
 if (!this.IsPostBack)
 {
 this.Session["UploadInfo"] = new UploadInfo { IsReady = false };
 }
 } 

 /// <summary>
 ///
 /// </summary>
 [System.Web.Services.WebMethod]
 [System.Web.Script.Services.ScriptMethod]
 public static object GetUploadStatus()
 {
 //获取文件长度
 UploadInfo info = HttpContext.Current.Session["UploadInfo"] as UploadInfo; 

 if (info != null && info.IsReady)
 {
 int soFar = info.UploadedLength;
 int total = info.ContentLength; 

 int percentComplete = (int)Math.Ceiling((double)soFar / (double)total * 100);
 string message = string.Format("上传 {0} ... {1} of {2} 字节", info.FileName, soFar, total); 

 // 返回百分比
 return new { percentComplete = percentComplete, message = message };
 } 

 // 还没有准备好...
 return null;
 } 

// --></mce:script>
</head>
<body>
 <form id="form1" runat="server">
 <asp:ScriptManager ID="scriptManager" runat="server" EnablePageMethods="true" /> 

 <mce:script type="text/javascript"><!--
 var intervalID = 0;
 var progressBar;
 var fileUpload;
 var form;
 // 进度条
 function pageLoad(){
 $addHandler($get('upload'), 'click', onUploadClick);
 progressBar = $find('progress');
 }
 // 注册表单
 function register(form, fileUpload){
 this.form = form;
 this.fileUpload = fileUpload;
 }
 //上传验证
 function onUploadClick() {
 var vaild = fileUpload.value.length > 0;
 if(vaild){
 $get('upload').disabled = 'disabled';
 updateMessage('info', '初始化上传...');
 //提交上传
 form.submit();
 // 隐藏frame
 Sys.UI.DomElement.addCssClass($get('uploadFrame'), 'hidden');
 // 0开始显示进度条
 progressBar.set_percentage(0);
 progressBar.show();
 // 上传过程
 intervalID = window.setInterval(function(){
 PageMethods.GetUploadStatus(function(result){
 if(result){
 // 更新进度条为新值
 progressBar.set_percentage(result.percentComplete);
 //更新信息
 updateMessage('info', result.message); 

 if(result == 100){
 // 自动消失
 window.clearInterval(intervalID);
 }
 }
 });
 }, 500);
 }
 else{
 onComplete('error', '您必需选择一个文件');
 }
 } 

 function onComplete(type, msg){
 // 自动消失
 window.clearInterval(intervalID);
 // 显示消息
 updateMessage(type, msg);
 // 隐藏进度条
 progressBar.hide();
 progressBar.set_percentage(0);
 // 重新启用按钮
 $get('upload').disabled = '';
 // 显示frame
 Sys.UI.DomElement.removeCssClass($get('uploadFrame'), 'hidden');
 }
 function updateMessage(type, value){
 var status = $get('status');
 status.innerHTML = value;
 // 移除样式
 status.className = '';
 Sys.UI.DomElement.addCssClass(status, type);
 } 

// --></mce:script> 

 <div>
 <div class="upload">
 <h3>文件上传</h3>
 <div>
 <iframe id="uploadFrame" frameborder="0" scrolling="no" src="Upload.aspx" mce_src="Upload.aspx"></iframe>
 <mb:ProgressControl ID="progress" runat="server" CssClass="lightblue" style="display:none" mce_style="display:none" Value="0" Mode="Manual" Speed=".4" Width="100%" />
 <div>
 <div id="status" class="info">请选择要上传的文件</div>
 <div class="commands">
 <input id="upload" type="button" value="上传" />
 </div>
 </div>
 </div>
 </div> 

 </div>
 </form>
</body>
</html> 

upload.aspx:

//限制大小 1M
 protected void Page_Load2(object sender, EventArgs e)
 {
 if (this.IsPostBack)
 {
 UploadInfo uploadInfo = this.Session["UploadInfo"] as UploadInfo;
 if (uploadInfo == null)
 {
 // 让父页面知道无法处理上传
 const string js = "window.parent.onComplete('error', '无法上传文件。请刷新页面，然后再试一次);";
 ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", js, true);
 }
 else
 {
 // 让服务端知道我们还没有准备好..
 uploadInfo.IsReady = false; 

 // 上传验证
 if (this.fileUpload.PostedFile != null && this.fileUpload.PostedFile.ContentLength > 0 

 && this.fileUpload.PostedFile.ContentLength < 1048576)// 限制1M
 {
 // 设置路径
 string path = this.Server.MapPath(@"Uploads");
 string fileName = Path.GetFileName(this.fileUpload.PostedFile.FileName); 

 // 上传信息
 uploadInfo.ContentLength = this.fileUpload.PostedFile.ContentLength;
 uploadInfo.FileName = fileName;
 uploadInfo.UploadedLength = 0; 

 //文件存在 初始化...
 uploadInfo.IsReady = true; 

 //缓存
 int bufferSize = 1;
 byte[] buffer = new byte[bufferSize]; 

 // 保存字节
 using (FileStream fs = new FileStream(Path.Combine(path, fileName), FileMode.Create))
 {
 while (uploadInfo.UploadedLength < uploadInfo.ContentLength)
 {
 //从输入流放进缓冲区
 int bytes = this.fileUpload.PostedFile.InputStream.Read(buffer, 0, bufferSize);
 // 字节写入文件流
 fs.Write(buffer, 0, bytes);
 // 更新大小
 uploadInfo.UploadedLength += bytes; 

 // 线程睡眠 上传就更慢 这样就可以看到进度条了
 System.Threading.Thread.Sleep(100);
 }
 } 

 // 删除.
 File.Delete(Path.Combine(path, fileName)); 

 // 让父页面知道已经处理上传完毕
 const string js = "window.parent.onComplete('success', '{0} 已成功上传');";
 ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", string.Format(js, fileName), true);
 }
 else
 {
 if (this.fileUpload.PostedFile.ContentLength >= 1048576)//1M
 {
 const string js = "window.parent.onComplete('error', '超出上传文件限制大小，请重新选择');";
 ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", js, true);
 }
 else
 {
 const string js = "window.parent.onComplete('error', '上传文件出错');";
 ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", js, true);
 }
 }
 uploadInfo.IsReady = false;
 }
 }
 } 

 // 不限制大小
 protected void Page_Load(object sender, EventArgs e)
 {
 if (this.IsPostBack)
 {
 UploadInfo uploadInfo = this.Session["UploadInfo"] as UploadInfo;
 uploadInfo.IsReady = false;
 if (this.fileUpload.PostedFile != null && this.fileUpload.PostedFile.ContentLength > 0)
 {
 string path = this.Server.MapPath(@"Uploads");
 string fileName = Path.GetFileName(this.fileUpload.PostedFile.FileName); 

 uploadInfo.ContentLength = this.fileUpload.PostedFile.ContentLength;
 uploadInfo.FileName = fileName;
 uploadInfo.UploadedLength = 0; 

 uploadInfo.IsReady = true; 

 int bufferSize = 1;
 byte[] buffer = new byte[bufferSize]; 

 using (FileStream fs = new FileStream(Path.Combine(path, fileName), FileMode.Create))
 {
 while (uploadInfo.UploadedLength < uploadInfo.ContentLength)
 {
 int bytes = this.fileUpload.PostedFile.InputStream.Read(buffer, 0, bufferSize);
 fs.Write(buffer, 0, bytes);
 uploadInfo.UploadedLength += bytes;
 }
 }
 const string js = "window.parent.onComplete('success', '{0} 已成功上传');";
 ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", string.Format(js, fileName), true);
 }
 else
 {
 const string js = "window.parent.onComplete('error', '上传文件出错');";
 ScriptManager.RegisterStartupScript(this, typeof(upload_aspx), "progress", js, true);
 }
 uploadInfo.IsReady = false;
 }
 } 

代码就不贴完了，直接上干货，亲，这可是免邮的哦！下载地址