标签：select title ace 整数 color sts 使用 data charset
1 <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="FileUploadByJs.aspx.cs" Inherits="WebApplication1.UI.FileUploadByJs" %> 2 3 <!DOCTYPE html> 4 5 <html xmlns="http://www.w3.org/1999/xhtml"> 6 <head runat="server"> 7 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 8 <title></title> 9 <script type="text/javascript" src="../JS/jquery.min.js"></script> 10 <script type="text/javascript"> 11 function Submit() { 12 var picPath = document.getElementById("imgFile").value; 13 if (picPath.trim() != "") { 14 postFile(picPath); 15 } 16 else { 17 alert("请先上传图片！"); 18 } 19 20 } 21 //判断文件是否是图片 22 function SelectImg() { 23 var picPath = document.getElementById("imgFile").value; 24 if (picPath.trim() != "") { 25 var fileSuffix = picPath.substring(picPath.lastIndexOf(‘.‘) + 1, picPath.length); 26 if (fileSuffix.toLowerCase() != ‘jpg‘ && fileSuffix.toLowerCase() != ‘png‘) { 27 alert("请上传图片文件！"); 28 return; 29 } 30 } 31 } 32 //上传图片到服务器 33 function postFile(data) { 34 var d = { 35 "imgUrl": data 36 } 37 $.ajax({ 38 url: "../AjaxHanlder/AjaxFileUploadHandler.ashx?action=FileUploadToServer", 39 data: d, 40 dataType: "JSON", 41 async: false, 42 success: function (msg) { 43 if (msg != "上传出错！") { 44 alert(msg);//返回图片路径 45 } 46 else { 47 alert(msg); 48 } 49 }, 50 error: function () { 51 alert("error"); 52 } 53 }); 54 } 55 </script> 56 </head> 57 <body> 58 <form id="form1" runat="server"> 59 选择要上传的图片: 60 <input type="file" name="file1" id="imgFile" onchange="SelectImg();" /> 61 <br /> 62 <input type="button" value="提交" id="submit" onclick="Submit();" /> 63 <br /> 64 </form> 65 </body> 66 </html>
1 using System; 2 using System.Collections.Generic; 3 using System.Drawing; 4 using System.Drawing.Imaging; 5 using System.IO; 6 using System.Linq; 7 using System.Web; 8 9 namespace WebApplication1.AjaxHanlder 10 { 11 /// <summary> 12 /// AjaxFileUploadHandler 的摘要说明 13 /// </summary> 14 public class AjaxFileUploadHandler : IHttpHandler 15 { 16 17 public void ProcessRequest(HttpContext context) 18 { 19 context.Response.ContentType = "text/plain"; 20 string action = context.Request.QueryString["action"]; 21 switch (action) 22 { 23 case "FileUploadToServer": 24 FileUploadToServer(context);//上传图片到服务器 25 break; 26 default: break; 27 } 28 } 29 30 private void FileUploadToServer(HttpContext context) 31 { 32 string imgUrl = context.Request.QueryString["imgUrl"].ToString() + ""; 33 try 34 { 35 MemoryStream s = new MemoryStream(); 36 Bitmap bitmap = new Bitmap(imgUrl); 37 bitmap.Save(s, ImageFormat.Jpeg); 38 s.Seek(0, SeekOrigin.Begin); 39 40 //Stream s = new BufferedStream(context.Request.InputStream); 41 byte[] bytes = new byte[s.Length]; 42 s.Read(bytes, 0, bytes.Length); 43 44 string name = Guid.NewGuid().ToString(); 45 string path = context.Server.MapPath("/uploads/" + name); 46 File.WriteAllBytes(path, bytes); 47 48 ///取到当前时间的年、月、日、分、秒和毫秒的值，并使用字符串格式把它们组合成一个字符串 49 String fileTime = DateTime.Now.Year.ToString() + DateTime.Now.Month.ToString() 50 + DateTime.Now.Day.ToString() + DateTime.Now.Hour.ToString() 51 + DateTime.Now.Second.ToString() + DateTime.Now.Minute.ToString() 52 + DateTime.Now.Millisecond.ToString(); 53 ///在时间字符串后面添加一个随机数和文件的后缀名 54 imgUrl = fileTime + GetRandomint() + Path.GetExtension(imgUrl); 55 56 string pathNew = context.Server.MapPath("/uploads/" + imgUrl); 57 58 if (File.Exists(path)) 59 { 60 File.Copy(path, pathNew, false); 61 File.Delete(path); 62 } 63 context.Response.Write(pathNew);//上传成功，返回路径 64 } 65 catch (Exception ex) 66 { 67 context.Response.Write("上传出错！"); 68 } 69 } 70 71 private String GetRandomint() 72 { 73 Random random = new Random(); 74 return (random.Next(10000).ToString()); //产生一个小于10000的随机正整数 75 } 76 77 public bool IsReusable 78 { 79 get 80 { 81 return false; 82 } 83 } 84 } 85 }
标签：select title ace 整数 color sts 使用 data charset
原文地址：http://www.cnblogs.com/lillyzou/p/6849083.html
