C# SqlBulkCopy类大批量数据存入数据库

最近因为要做数据性能优化，原有的数据通过foreach循环插入数据库，由于每循环一次就要和数据库交互一次，性能非常差，用时很长，在网上查阅了一些资料找到了SqlBulkCopy这个类，在原有的数据基础上进行改造，性能非常高。在此将自己的一些使用心得和大家分享：

  private void ForeachTa(DataTable dtF,string id)
    {
 Stopwatch watch = new Stopwatch();
        watch.Start();
        DataTable dt = new DataTable();//准备存放数据的临时表
        //构造表的列
        dt.Columns.Add("ID");
        dt.Columns.Add("MaterialID");
        dt.Columns.Add("BillID");
        dt.Columns.Add("code");
        dt.Columns.Add("Name");
        dt.Columns.Add("Model");
        dt.Columns.Add("MeasureUnit");
        dt.Columns.Add("Price");
        dt.Columns.Add("Provider");
        dt.Columns.Add("LastPrice");
        foreach (DataRow row in dtF.Rows)
        {
            if (row["MaterialID"] == DBNull.Value)
            {
                if (!string.IsNullOrEmpty(row["Price"].ToString()))
                {
                    DataRow rows = dt.NewRow();
                    rows["ID"] = System.Guid.NewGuid().ToString();
                    rows["BillID"] = id;
                    rows["Name"] = row["Name"];
                    rows["Model"] = row["Model"];
                    rows["MeasureUnit"] = row["MeasureUnit"];
                    rows["Price"] = decimal.Parse(row["Price"].ToString());
                    rows["Provider"] = row["Provider"];
                    dt.Rows.Add(rows);
                }
                else
                {
                    DataRow rows = dt.NewRow();
                    rows["ID"] = System.Guid.NewGuid().ToString();
                    rows["BillID"] = id;
                    rows["Name"] = row["Name"];
                    rows["Model"] = row["Model"];
                    rows["MeasureUnit"] = row["MeasureUnit"];
                    rows["Provider"] = row["Provider"];
                    dt.Rows.Add(rows);
                }
            }
            else
            {
                if (!string.IsNullOrEmpty(row["Price"].ToString()))
                {
                    DataRow rows = dt.NewRow();
                    rows["ID"] = System.Guid.NewGuid().ToString();
                    rows["MaterialID"] = row["MaterialID"];
                    rows["BillID"] = id;
                    rows["Code"] = row["Code"];
                    rows["Name"] = row["Name"];
                    rows["Model"] = row["Model"];
                    rows["MeasureUnit"] = row["MeasureUnit"];
                    rows["Price"] = decimal.Parse(row["Price"].ToString());
                    rows["LastPrice"] = decimal.Parse(row["Price"].ToString());
                    rows["Provider"] = row["Provider"];
                    dt.Rows.Add(rows);
                }
                else
                {
                    DataRow rows = dt.NewRow();
                    rows["ID"] = System.Guid.NewGuid().ToString();
                    rows["MaterialID"] = row["MaterialID"];
                    rows["BillID"] = id;
                    rows["Code"] = row["Code"];
                    rows["Name"] = row["Name"];
                    rows["Model"] = row["Model"];
                    rows["MeasureUnit"] = row["MeasureUnit"];
                    rows["Provider"] = row["Provider"];
                    dt.Rows.Add(rows);
                }

            }
        }
        //重点代码处理方式
        string connStr = ConfigurationManager.ConnectionStrings["SqlConnectionString"].ConnectionString;//连接字符串
        using (SqlBulkCopy sqlBulkcopy = new SqlBulkCopy(connStr))
        {
            sqlBulkcopy.DestinationTableName = "表名";//定义需要存入数据库中的相应的表的名称
            sqlBulkcopy.ColumnMappings.Add("ID", "ID");
            sqlBulkcopy.ColumnMappings.Add("MaterialID", "MaterialID");
            sqlBulkcopy.ColumnMappings.Add("BillID", "BillID");
            sqlBulkcopy.ColumnMappings.Add("Code", "Code");
            sqlBulkcopy.ColumnMappings.Add("Name", "Name");
            sqlBulkcopy.ColumnMappings.Add("Model", "Model");
            sqlBulkcopy.ColumnMappings.Add("MeasureUnit", "MeasureUnit");
            sqlBulkcopy.ColumnMappings.Add("Price", "Price");
            sqlBulkcopy.ColumnMappings.Add("LastPrice", "LastPrice");
            sqlBulkcopy.ColumnMappings.Add("Provider", "Provider");
            sqlBulkcopy.WriteToServer(dt);
        }
        watch.Stop();
        }