c#连接sqlserver数据库、插入数据、从数据库获取时间示例

c#连接sqlserver、插入数据、从数据库获取时间

namespace Test
{
    //连接数据库
    public class Connection
    {
        private static string connectionString =
            "Server = 192.168.1.222;" +
            "Database = Test;" +
            "User ID = Test;" +
            "Password = abc123;";

        /// <summary>
        /// 连接数据库
        /// </summary>
        /// <returns></returns>
        private SqlConnection ConnectionOpen()
        {
            SqlConnection conn = new SqlConnection(connectionString);
            conn.Open();
            return conn;
        }

        /// <summary>
        /// 向表(Table)中插入一条数据
        /// </summary>
        public void Insert(string value1, string value2, string value3, DateTime dateTime)
        {
            SqlConnection conn = ConnectionOpen();
            string sql =
                "insert into Table(row1, row2, row3, DateTime) values ('" +
                value1 + "', '" + value2 + "', '" + value3 + "', '" + dateTime + "')";
            SqlCommand comm = new SqlCommand(sql, conn);
            comm.ExecuteReader();
　　
            conn.Close();
        }

        /// <summary>
        /// 从数据库中获取当前时间
        /// </summary>
        /// <returns></returns>
        public DateTime GetDateTimeFromSQL()
        {
            SqlConnection conn = ConnectionOpen();
            string sql = "select getdate()";
            SqlCommand comm = new SqlCommand(sql, conn);
            SqlDataReader reader = comm.ExecuteReader();
            DateTime dt;
            if (reader.Read())
            {
                dt = (DateTime)reader[0];
                conn.Close();
                return dt;
            }
            conn.Close();
            return DateTime.MinValue;
        }
    }
}
</div>

c#连接SQL Server 2008示例

using System;
using System.Data;
using System.Data.SqlClient;

namespace insurer
{
  /// <summary>
  /// DataAccess 的摘要说明。
  /// </summary>
  public class DataAccess
  {
    private readonly string SQLCONNECTSTR = "server=(local);uid=sa;pwd=lwrong;database=insurer";
    private SqlConnection dbConnection;
    private readonly string RETUENVALUE = "RETURNVALUE";   

    //判断要不要启动事务
                private bool startrans = false;

    //为解决多笔数据导入的问题,特添加的事务处理属性
    private SqlTransaction trans = null;

               
    //定义是否启动事务属性
    public bool StartTrans
    {
      get
      {
        return startrans;
      }
      set
      {
        startrans = value;
      }
    }

    //定义事务
    public SqlTransaction Trans
    {
      get
      {
        return trans;
      }
      set
      {
        if (value != null)
        {
          trans = value;
        }
      }
    }

    //创建打开dbConnection对象
    public void OpenConnection()
    {
      if ( dbConnection == null )
      {
        dbConnection = new SqlConnection(SQLCONNECTSTR);
      }

      if ( dbConnection.State == ConnectionState.Closed )
      {
        try
        {
          dbConnection.Open();