checkuser.cs

注册系统

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
//该源码下载自www.51aspx.com(５１ａｓpｘ．ｃｏｍ)

/// <summary>
/// CheckUser 的摘要说明
/// </summary>
public class CheckUser
{
    SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["dbuser"].ConnectionString);

	public CheckUser()
	{
		//
		// TODO: 在此处添加构造函数逻辑
		//
	}

    public bool CheckUsers(String name)
    {
        String T_name = name;

        String sql = "select * from info where UserName='" + T_name + "'";

        SqlCommand cmd = new SqlCommand(sql, con);

        try
        {
            con.Open();

            SqlDataReader MyReader = cmd.ExecuteReader();

            if (MyReader.Read())
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        catch (Exception ex)
        {
            throw (ex);
        }
        finally
        {
            con.Close();
        }
    }
}