上传功能
今天是八一节，打起精神，看看园子，发现吴大神的帖子，觉好，转来收藏一下。出处：http://www.cnblogs.com/wu-jian/。也谢谢大神的分享 ^_^.
//前台注册控件
<%@ Register Assembly="MattBerseth.WebControls.AJAX" Namespace="MattBerseth.WebControls.AJAX.Progress" TagPrefix="mb" %>
然后前台代码(包括JS)
<head id="Head1" runat="server"> <title>Untitled Page</title> <link href="../App_Themes/css/progress.css" rel="stylesheet" type="text/css" /> <link href="../App_Themes/css/upload.css" rel="stylesheet" type="text/css" /> <script src="../App_Themes/JS/jquery.js" type="text/javascript"></script> <script language="javascript" 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); } </script> <style type="text/css"> BODY{ font-family:Arial, Sans-Serif; font-size:12px;} </style> </head> <body> <form id="form1" runat="server"> <asp:ScriptManager ID="scriptManager" runat="server" EnablePageMethods="true" /> <div> <div class="upload"> <h3>文件上传</h3> <div> <iframe id="uploadFrame" frameborder="0" scrolling="no" src="Upload.aspx"></iframe> <mb:ProgressControl ID="progress" runat="server" CssClass="lightblue" 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>
后台：
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; }
UploadInfo.cs 类：
using System; using System.Data; using System.Configuration; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; public class UploadInfo { public bool IsReady { get; set; } public int ContentLength { get; set; } public int UploadedLength { get; set; } public string FileName { get; set; } }
还有就是一个页：
<%@ Page Language="C#" EnableSessionState="ReadOnly" Async="true" %> <%@ Import Namespace="System.IO" %> <!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> <script runat="server"> //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(jindutiao_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(jindutiao_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(jindutiao_upload_aspx), "progress", js, true); } else { const string js = "window.parent.onComplete('error', '上传文件出错');"; ScriptManager.RegisterStartupScript(this, typeof(jindutiao_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(jindutiao_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(jindutiao_upload_aspx), "progress", js, true); } uploadInfo.IsReady = false; } } </script> <style type="text/css"> BODY{margin:0; padding:0; background-color:#F0F8FF;} </style> </head> <body> <form id="form" runat="server" enctype="multipart/form-data"> <asp:ScriptManager ID="scriptManager" runat="server" /> <script type="text/javascript"> function pageLoad(sender, args){ window.parent.register( $get('<%= this.form.ClientID %>'), $get('<%= this.fileUpload.ClientID %>') ); } </script> <div> <asp:FileUpload ID="fileUpload" runat="server" Width="100%" /> </div> </form> </body> </html>
再次谢谢大神！
