个人学习代码保存:例2.小项目的sql简单的数据库操作类

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;
    public DataBase()
    {
        //
        // TODO: 在此处添加构造函数逻辑
        //
    }
    /**//// <summary>
    /// 获得一个DataBase实例
    /// </summary>
    /// <returns></returns>
    public static DataBase getInstance()
    {
        if (_instance == null)
        {
            _instance = new DataBase();
        }
        return _instance;
    }
    /**//// <summary>
    /// 返回SqlConnection对象实例
    /// </summary>
    /// <returns></returns>
    public static SqlConnection ReturnCon()
    {
        string connstr=ConfigurationManager.AppSettings["ConnectionString"].ToString();
        SqlConnection con = new SqlConnection(connstr);
        if (con.State.Equals(ConnectionState.Closed))
        {
            con.Open();
        }
        return con;
    }
    /**//// <summary>
    /// 返回SqlCommand对象实例
    /// </summary>
    /// <param name="procName"></param>
    /// <returns></returns>
    public static SqlCommand CreateCmd(string procName)
    {
        SqlConnection con = ReturnCon();
        SqlCommand cmd = new SqlCommand(procName,con);
        cmd.CommandType = CommandType.StoredProcedure;
        return cmd;
    }
    public static SqlCommand CreateCmd(string procName, SqlParameter[] prams)
    {
        SqlConnection con = ReturnCon();
        SqlCommand cmd = new SqlCommand(procName,con);
        cmd.CommandType = CommandType.StoredProcedure;
        foreach (SqlParameter parameter in prams)
        {
            cmd.Parameters.Add(parameter);
        }
        return cmd;
    }
    public static SqlCommand CreateCmd(string procName, SqlConnection con)
    {
        SqlConnection sqlcon = con;
        if (sqlcon.State.Equals(ConnectionState.Closed))
        {
            sqlcon.Open();
        }
        SqlCommand cmd = new SqlCommand(procName,sqlcon);
        cmd.CommandType = CommandType.StoredProcedure;
        return cmd;
    }
    public static SqlCommand CreateCmd(string procName, SqlParameter[] prams, SqlConnection con)
    {
        SqlConnection sqlcon = con;
        if (sqlcon.State.Equals(ConnectionState.Closed))
        {
            sqlcon.Open();
        }
        SqlCommand cmd = new SqlCommand(procName,sqlcon);
        cmd.CommandType = CommandType.StoredProcedure;
        foreach (SqlParameter parameter in prams)
        {
            cmd.Parameters.Add(parameter);
        }
        return cmd;
    }
    /**//// <summary>
    /// 返回SqlDataReader对象实例
    /// </summary>
    /// <param name="procName"></param>
    /// <returns></returns>
    public static SqlDataReader RunProcGetReader(string procName)
    {
        SqlCommand cmd = CreateCmd(procName);
        SqlDataReader sdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        return sdr;
    }
    public static SqlDataReader RunProGetReader(string procName, SqlParameter[] prams)
    {
        SqlCommand cmd = CreateCmd(procName, prams);
        SqlDataReader sdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        return sdr;
    }
    public static SqlDataReader RunProGetReader(string procName, SqlConnection con)
    {
        SqlCommand cmd = CreateCmd(procName, con);
        SqlDataReader sdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        return sdr;
    }
    public static SqlDataReader RunProGetReader(string procName, SqlParameter[] prams, SqlConnection con)
    {
        SqlCommand cmd = CreateCmd(procName, prams, con);
        SqlDataReader sdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        return sdr;
    }
    /**//// <summary>
    /// 返回DataTable对象实例
    /// </summary>
    /// <param name="procName"></param>
    /// <param name="prams"></param>
    /// <param name="con"></param>
    /// <returns></returns>
    public static DataTable RunProTable(string procName, SqlParameter[] prams, SqlConnection con)
    {
        SqlCommand cmd = CreateCmd(procName, prams, con);
        SqlDataAdapter sda = new SqlDataAdapter(cmd);
        DataSet ds = new DataSet();
        sda.Fill(ds);
        DataTable dt=ds.Tables[0];
        con.Close();
        return dt;
    }
    /**//// <summary>
    /// 返回执行结果受影响的行数
    /// </summary>
    /// <param name="procName"></param>
    /// <returns></returns>
    public static int RunProExecute(string procName)
    {
        SqlCommand cmd = CreateCmd(procName);
        int intResult = cmd.ExecuteNonQuery();
        return intResult;
    }
    /**//// <summary>
    /// 返回首行首列
    /// </summary>
    /// <param name="procName"></param>
    /// <returns></returns>
    public static int RunProScalar(string procName)
    {
        SqlCommand cmd = CreateCmd(procName);
        int intResult = Convert.ToInt32(cmd.ExecuteScalar());
        return intResult;
    }
    public static int RunProScalar(string procName, SqlParameter[] prams)
    {
        SqlCommand cmd = CreateCmd(procName, prams);
        int intResult = Convert.ToInt32(cmd.ExecuteScalar());
        return intResult;
    }
}