[ADO.NET]写入数据

public void InsertOneIntoSourceDB()
{            
    if (DBConnection(GetConnectionString()))
    {
        string sqlinsert = null;
        SqlTransaction tran = con.BeginTransaction();
        SqlCommand cmd = con.CreateCommand();
        cmd.Transaction = tran;
        try
        {
            sqlinsert = "insert into MeterMeasureHistories values(@meterMeasureID,@value,@quality,@timestamp)";
            cmd.CommandText = sqlinsert;
            SqlParameter[] parameters = new SqlParameter[]
                {
                    new SqlParameter("@meterMeasureID",SqlDbType.Int){Value = 133},
                    new SqlParameter("@value",SqlDbType.Float){Value = 0},
                    new SqlParameter("@quality",SqlDbType.NVarChar){Value = "good"}, 
                    new SqlParameter("@timestamp",SqlDbType.DateTime){Value = DateTime.Now}
                };
            cmd.Parameters.AddRange(parameters);
            cmd.ExecuteNonQuery();
            tran.Commit();
        }
        catch (Exception e)
        {
            throw e;
        }
        DBShutdown();
    }
}

public void InsertIntoSourceDB()
{
    if (DBConnection(GetConnectionString()))
    {
        try
        {
            DataTable dt = new DataTable();
            dt.Columns.AddRange(new DataColumn[] 
            { 
                new DataColumn("MeterMeasureHistoryID"), 
                new DataColumn("MeterMeasureID"), 
                new DataColumn("Value"), 
                new DataColumn("Quality"), 
                new DataColumn("Timestamp")
            });
            foreach (var item in meterMeasureHistories)
            {
                DataRow dr = dt.NewRow();
                dr[1] = item.MeterMeasureID;
                dr[2] = item.Value;
                dr[3] = item.Quality;
                dr[4] = item.Timestamp;
                dt.Rows.Add(dr);
            }
            SqlBulkCopy bulkcopy = new SqlBulkCopy(con);
            bulkcopy.DestinationTableName = "dbo.MeterMeasureHistories";
            bulkcopy.WriteToServer(dt);
        }
        catch (Exception e)
        {
            throw e;
        }
        DBShutdown();
    }
}