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  • [ADO.NET]写入数据

    关键字:.NET,SQL SERVER,SQLBULKCOPY

    插入一条数据的操作(SqlCmd)。

    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();
        }
    }

    插入多条数据,利用了SqlBulkCopy、DataTable、DataRow,效率比循环高(SqlDataAdapter)。

    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();
        }
    }
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  • 原文地址:https://www.cnblogs.com/belloworld/p/5210444.html
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