asp.net 上传进度条 例子源码下载

using System;using System.Collections;using System.Configuration;using System.Data;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;using System.IO;public partial class Upload : System.Web.UI.Page{ // 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}');"; ScriptManager.RegisterStartupScript(this, this.GetType(), "progress", string.Format(js, fileName), true); } else { const string js = "window.parent.onComplete('error', '上传文件出错');"; ScriptManager.RegisterStartupScript(this, this.GetType(), "progress", js, true); } uploadInfo.IsReady = false; } } //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, this.GetType(), "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, this.GetType(), "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, this.GetType(), "progress", js, true); } else { const string js = "window.parent.onComplete('error', '上传文件出错');"; ScriptManager.RegisterStartupScript(this, this.GetType(), "progress", js, true); } } uploadInfo.IsReady = false; } } } }