练习文件保存按照日期来创建文件夹，并保存

上传页面：

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
    <title></title>
</head>
<body>
    <form action="UploadStoreByDate.ashx" method="post" enctype="multipart/form-data">

        <input type="file" name="file1" />
        <input type="submit" value="上传" />
    </form>

</body>
</html>

处理页面：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;

namespace Web1
{
    /// <summary>
    /// UploadStoreByDate 的摘要说明
    /// </summary>
    public class UploadStoreByDate : IHttpHandler
    {

        public void ProcessRequest(HttpContext context)
        {

            context.Response.ContentType = "text/html";
            context.Response.Write("<html><head><title>文件保存按日期</title></head><body>");

            HttpPostedFile file1 = context.Request.Files["file1"];
            if (file1.ContentLength <= 0)
            {
                context.Response.Write("请选择要上传的文件");
                OutputHtmlEnd(context.Response);
                return;
            }
            if (file1.ContentLength > 2 * 1024 * 1024)
            {
                context.Response.Write("只允许上传不大于1MB的文件");
                OutputHtmlEnd(context.Response);
                return;
            }
            string fileExt = Path.GetExtension(file1.FileName);//文件的扩展名
            if (fileExt != ".zip" && fileExt != ".rar")
            {
                context.Response.Write("只允许上传zip、rar....文件");
                OutputHtmlEnd(context.Response);
                return;
            }
            string dirPath = DateTime.Now.Year + "/" + DateTime.Now.Month + "/" + DateTime.Now.Day;//upload中建的目录按日期创建
            string dirFullPath = context.Server.MapPath("~/upload/"+dirPath+"/");//建的目录全路径
            string fileFullPath = Path.Combine(dirFullPath,file1.FileName);//一个文件全路径（带文件名）
            if (!Directory.Exists(dirFullPath))//如果文件夹不存在，则先创建文件夹
            {
                Directory.CreateDirectory(dirFullPath);
            }
            file1.SaveAs(fileFullPath);
            context.Response.Write("文件上传成功！");
 
        }

        private void OutputHtmlEnd(HttpResponse response)
        {
            response.Write("</body></html>");
        }

        public bool IsReusable
        {
            get
            {
                return false;
            }
        }
    }
}

SqlHelper类：

using System;
using System.Data;
using System.Data.SqlClient;
using System.Web;

namespace Web1
{
    public class SqlHelper
    {
        //连接字符创
        private static readonly string connstr = "Data Source=.;Initial Catalog=Persons;Persist Security Info=True;User ID=sa;Password=123";

        //执行查询，返回一张二维表  -----------(查)
        public static DataTable ExecuteQuery(string sql, params SqlParameter[] parameters)
        {
            using (SqlConnection conn = new SqlConnection(connstr))
            using (SqlCommand cmd = conn.CreateCommand())
            {
                conn.Open();
                cmd.CommandText = sql;
                cmd.Parameters.AddRange(parameters);//连续添加
                DataTable dt = new DataTable();//实例化一个表
                using(SqlDataReader reader=cmd.ExecuteReader())
                {
                    dt.Load(reader);//查询完一条记录就加载到实例化的表dt中
                    return dt;
                }
            }
        }
        //返回受影响的行数，引用外部的，一个连接，和传进来的参数 ------------（增。删。改）
        public static int ExecuteNonQuery(string sql,params SqlParameter[] parameters)
        { 
            using(SqlConnection conn=new SqlConnection(connstr))
            using (SqlCommand cmd = conn.CreateCommand())
            {
                conn.Open();
                cmd.CommandText = sql;
                cmd.Parameters.AddRange(parameters);
                return cmd.ExecuteNonQuery();//返回该语句受影响的行数
            }

        }
        public static object ExecuteScalar(string sql, params SqlParameter[] paramerters)
        { 
           using(SqlConnection conn=new SqlConnection(connstr))
           using (SqlCommand cmd = conn.CreateCommand())
           {
               conn.Open();
               cmd.CommandText = sql;
               cmd.Parameters.AddRange(paramerters);
               return cmd.ExecuteScalar();//返回该语句查找的对象
           }
        }

    }
}

 



posted @ 2015-06-02 14:02  t800  阅读(321)  评论(0)  编辑  收藏  举报