數據庫操作類SQLHelper

有關C#連接SQL server 的 一些數據庫操作函數

數據庫操作類SQLHelper:

using System;
using System.Data;
using System.Configuration;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Xml;
using System.Data.SqlClient;
using System.Collections;

/// <summary>
///SQLHelper 的摘要說明
/// </summary>
namespace Web.DataAccess         //命名空間，方便項目裏的其他文件using引用
{
public sealed class SQLHelper
{
	//數據庫連接字符串
    public static string SQLCONSTR = "Data Source=IE361-PC ;Initial Catalog=CSSTS;Integrated Security=SSPI;User ID=sa;Password=xj;Connect Timeout=20";
    //對數據庫進行更新，插入刪除
    public static void ExecuteNonQuery(string sql)
    {
        using (SqlConnection conn = new SqlConnection(SQLCONSTR))
        {
            conn.Open();
            SqlCommand cmd = new SqlCommand(sql,conn);
            cmd.ExecuteNonQuery();
            conn.Close();
        }
    }
    //返回一個數據集DataSet
    public static DataSet ExecuteDataSet(string sql)
    {
        using (SqlConnection conn = new SqlConnection(SQLCONSTR))
        {
            SqlDataAdapter sda = new SqlDataAdapter(sql,conn);
            DataSet ds = new DataSet();
            sda.Fill(ds);
            return ds;
        }
    }
    //返回SQl查詢語句的首行首列
    public static object ExecuteScalar(string sql)
    {
        using (SqlConnection conn = new SqlConnection(SQLCONSTR))
        {
            conn.Open();
            SqlCommand cmd = new SqlCommand(sql,conn);
            return cmd.ExecuteScalar();
        }
    }
}

}