Html文件上传控件（整理前台使用版）

asp.net文件上传。。ajax
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;using System.Text;namespace UploadDemo.project{ public partial class UploadWeb : System.Web.UI.Page { string filename = null; protected void Page_Load(object sender, EventArgs e) { try { HttpPostedFile postFile = Request.Files[0]; filename = Request.QueryString["filename"].ToString(); //开始上传 string _savedFileResult = UpLoadFile(postFile, filename); Response.Write(_savedFileResult); } catch (Exception ex) { Response.Write("0|上传提交出错"); } } public string UpLoadFile(HttpPostedFile str, string filename) { return UpLoadFile(str, "/Authorization/", filename); } public string UpLoadFile(HttpPostedFile httpFile, string toFilePath, string filename) { try { //获取要保存的文件信息 //string filerealname = httpFile.FileName; string filerealname = filename; //获得文件扩展名 string fileNameExt = System.IO.Path.GetExtension(filerealname); if (CheckFileExt(fileNameExt)) { //检查保存的路径 是否有/结尾 if (toFilePath.EndsWith("/") == false) toFilePath = toFilePath "/"; //按日期归类保存 string datePath = "/";//DateTime.Now.ToString("yyyyMM") "/" DateTime.Now.ToString("dd") "/"; if (true) { toFilePath = datePath; } //物理完整路径 string toFileFullPath = System.Web.HttpContext.Current.Request.PhysicalApplicationPath toFilePath; //检查是否有该路径 没有就创建 if (!System.IO.Directory.Exists(toFileFullPath)) { Directory.CreateDirectory(toFileFullPath); } //得到服务器文件保存路径 string toFile = Server.MapPath("~" toFilePath); string f_file = getName(filerealname); //将文件保存至服务器 httpFile.SaveAs(toFile f_file); return "1|文件上传成功"; } else { return "0|文件不合法"; } } catch (Exception e) { return "0|文件上传失败,错误原因：" e.Message; } } /// <summary> /// 获取文件名 /// </summary> /// <param name="fileNamePath"></param> /// <returns></returns> private string getName(string fileNamePath) { string[] name = fileNamePath.Split('\\'); return name[name.Length - 1]; } /// <summary> /// 检查是否为合法的上传文件 /// </summary> /// <param name="_fileExt"></param> /// <returns></returns> private bool CheckFileExt(string _fileExt) { string[] allowExt = new string[] { ".gif", ".jpg", ".jpeg", ".rar", ".png" }; for (int i = 0; i < allowExt.Length; i ) { if (allowExt[i] == _fileExt) { return true; } } return false; } public static string GetFileName() { Random rd = new Random(); StringBuilder serial = new StringBuilder(); serial.Append(DateTime.Now.ToString("HHmmss")); serial.Append(rd.Next(100, 999).ToString()); return serial.ToString(); } }}