App_Code/Database.cs

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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;

/// <summary>
/// Database 的摘要说明
/// </summary>
public class Database
{
    private static Database _instance;
	protected Database()
	{
		//
		// TODO: 在此处添加构造函数逻辑
		//
	}
    public static Database getInstance()
    {
        if (_instance == null)
        {
            _instance = new Database();
        }
        return _instance;
    }
    //返回一个连接SqlConnection
    #region    
    public  static SqlConnection ReturnConn()
    {
        string strConn = System.Configuration.ConfigurationManager.AppSettings["connection"];
        //string strConn = System.Configuration.ConfigurationManager.AppSettings["ConnectionString"];
        SqlConnection Conn = new SqlConnection(strConn);
        if(Conn.State.Equals(ConnectionState.Closed))
        {
            Conn.Open();
        }
        return Conn;
    }
    #endregion
    //返回SqlCommand
    #region
    public  static SqlCommand CreatCmd(string procName, SqlParameter[] prams)
    {
        SqlConnection Conn = ReturnConn();
        SqlCommand Cmd = new SqlCommand();
        Cmd.CommandType = CommandType.StoredProcedure;
        Cmd.CommandText = procName;
        Cmd.Connection = Conn;
        if (prams != null)
        {
            foreach (SqlParameter paramenter in prams)
            {
                if (paramenter != null)
                {