小编tee*_*tee的帖子

如何在ac #project中添加命名空间？我是初学者.

if(!string.IsNullOrEmpty(result))
{
    CoderBuddy.ExtractEmails helper = new CoderBuddy.ExtractEmails(result);
    EmailsList = helper.Extract_Emails;
}

我的Form1需要使用以下命名空间:

// this is the file that I need to add
using System;
using System.Collections.Generic;
using System.Text;
using System.Text.RegularExpressions;
namespace Coderbuddy
{
    public class ExtractEmails
    {
        private string s;
        public ExtractEmails(string Text2Scrape)
        {
            this.s = Text2Scrape;
        }
        public string[] Extract_Emails()
        {
            string[] Email_List = new string[0];
            Regex r = new Regex(@"[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,6}", RegexOptions.IgnoreCase);
            Match m;
            //Searching for the text that matches the above regular expression(which only matches email …

如何查看以下查询返回的行数？

mysql_select_db($database_aoldatabase, $aoldatabase);

$query1 = "select * from sale where secid  = $invoiceno ";
$query2 = "select * from sale where secid  = $invoiceno ";


$maxa = mysql_query ($query1)
    or die ("Query '$query' failed with error message: \"" . mysql_error () . '"');
$maxa2 = mysql_query ($query2)
    or die ("Query '$query' failed with error message: \"" . mysql_error () . '"');

$row = mysql_fetch_array($maxa);
$row2 = mysql_fetch_array($maxa2);

排队

 urls[i] =  Reader.GetValue(i).ToString();  

它说错误1当前上下文中不存在名称"i"

我该怎么办呢

private void Form1_Load(object sender, EventArgs e)
    {
        string MyConString = "SERVER=192.168.0.78;" +
             "DATABASE=webboard;" +
             "UID=aimja;" +
             "PASSWORD=aimjawork;" +
             "charset=utf8;";
        MySqlConnection connection = new MySqlConnection(MyConString);
        MySqlCommand command = connection.CreateCommand();
        MySqlDataReader Reader;
        command.CommandText = "SELECT  url FROM `listweb` WHERE `url` IS NOT NULL AND ( `webbordkind` = '¿¿¿¿¿¿¿¿¿¿¿¿' ) and `nourl`= 'n' order by province, amphore limit 4 ";
        connection.Open();
        Reader = command.ExecuteReader();


        string[] urls = new string[2];
        string thisrow = "";
        string sumthisrow = ""; …