急急急，究竟是哪里出现了问题？ C#
using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
using System.Data;
using System.Data.SqlClient;
using System.Net;
using System.IO;
using System.Web;
namespace Notebook_PC_Channel
{
class Program
{
static void Main(string[] args)
{
string strconnection= "Server=127.0.0.1;uid=sa;password=wxj;database=ztx; ";
// string strsql = "select * from notebook_pc_brand where yes_image_url is not null ";
string strsql = "select yes_image_url from notebook_pc_brand where yes_image_url != ' ' ";
SqlConnection sqlconnection2 = new SqlConnection(strconnection);
SqlCommand sqlcommand2 = new SqlCommand(strsql,sqlconnection2);
SqlDataReader sqlread2 = null;
string mystring= " ";
Regex re = new Regex(@ " <div class= " "pro_img " "> [\s\S]*?href= " "(? <地址> [\s\S]*?) " "[\s\S]*?src= " "(? <图片> [\s\S]*?) " "[\s\S]*? class= " "a_lan12b " "> (? <型号> [\s\S]*?) </a> [\s\S]*? class= " "up_two " "> <a href= " "(? <价格地址> [\s\S]*?) " "[\s\S]*?￥(? <价格> [\s\S]*?) </a> [\s\S]*?class= " "up_three " "> (? <日期> [\s\S]*?) </div> [\s\S]*? <div class= " "price_brief " "> \n[\s\S]*?(? <描述> 笔记本[\s\S]*?) </div> [\s\S]*?class= " "info_cnt " "> · <a href= " "(? <商家地址> [\s\S]*?) " "[\s\S]*? <span class= " "lan12x " "> (? <商家数量> [\s\S]*?) </span> [\s\S]*? <div class= " "info_cnt " "> · <a href= " "(? <评论地址> [\s\S]*?) " "[\s\S]*? class= " "lan12x " "> (? <评论数量> [\s\S]*?) </span> [\s\S]*?class= " "info_cnt " "> · <a href= " "(? <新闻地址> [\s\S]*?) " "[\s\S]*? <span class= " "lan12x " "> (? <新闻数量> [\s\S]*?) </span> [\s\S]*? <div class= " "comp " "> [\s\S]*?href= " "(? <比较价格> [\s\S]*?) " "[\s\S]*? <table class= " "offset_tab " " [\s\S]*?this.page.value,(? <分页数量> [\s\S]*?), '(? <前缀> [\s\S]*?) ' ");
WebClient mywebclient = new WebClient();
mywebclient.Credentials = CredentialCache.DefaultCredentials;
try
{
sqlconnection2.Open();
sqlread2 = sqlcommand2.ExecuteReader();
while (sqlread2.Read())
{
mystring += sqlread2[ "yes_image_url "].ToString() + "\n ";
byte[] mybyte = mywebclient.DownloadData(sqlread2[ "yes_image_url "].ToString());
string my_byte_string = Encoding.Default.GetString(mybyte);
MatchCollection mc = re.Matches(my_byte_string);
foreach (Match m in mc)
{
Console.WriteLine( "连接地址: " + m.Groups[ "地址 "].ToString());
}
}
}
catch (Exception ex)
{
Console.WriteLine( "抓取数据出现错误 "+ex.ToString());
}
Console.ReadLine();
}
}
}
我的notebook_pc_brand表里面有24条数据，但是这个程序好像只走了我的数据表中的第一条数据。也就是只运行了一个url。
[解决办法]
强
