我正在寻找通过 c# 加载批量数据的最快方法。我有这个脚本可以完成这项工作,但速度很慢。我阅读了 SqlBulkCopy 是最快的证词。
1000 条记录 2.5 秒。文件包含接近 5000 到 250k 的记录 有哪些可以减慢速度的东西?
表定义:
CREATE TABLE [dbo].[tempDispositions](
[QuotaGroup] [varchar](100) NULL,
[Country] [varchar](50) NULL,
[ServiceGroup] [varchar](50) NULL,
[Language] [varchar](50) NULL,
[ContactChannel] [varchar](10) NULL,
[TrackingID] [varchar](20) NULL,
[CaseClosedDate] [varchar](25) NULL,
[MSFTRep] [varchar](50) NULL,
[CustEmail] [varchar](100) NULL,
[CustPhone] [varchar](100) NULL,
[CustomerName] [nvarchar](100) NULL,
[ProductFamily] [varchar](35) NULL,
[ProductSubType] [varchar](255) NULL,
[CandidateReceivedDate] [varchar](25) NULL,
[SurveyMode] [varchar](1) NULL,
[SurveyWaveStartDate] [varchar](25) NULL,
[SurveyInvitationDate] [varchar](25) NULL,
[SurveyReminderDate] [varchar](25) NULL,
[SurveyCompleteDate] [varchar](25) NULL,
[OptOutDate] [varchar](25) NULL,
[SurveyWaveEndDate] [varchar](25) NULL,
[DispositionCode] [varchar](5) NULL,
[SurveyName] [varchar](20) NULL,
[SurveyVendor] [varchar](20) NULL,
[BusinessUnitName] [varchar](25) NULL,
[UploadId] [int] NULL,
[LineNumber] [int] NULL,
[BusinessUnitSubgroup] [varchar](25) NULL,
[FileDate] [datetime] NULL
) ON [PRIMARY]
这是代码
private void BulkLoadContent(DataTable dt)
{
OnMessage("Bulk loading records to temp table");
OnSubMessage("Bulk Load Started");
using (SqlBulkCopy bcp = new SqlBulkCopy(conn))
{
bcp.DestinationTableName = "dbo.tempDispositions";
bcp.BulkCopyTimeout = 0;
foreach (DataColumn dc in dt.Columns)
{
bcp.ColumnMappings.Add(dc.ColumnName, dc.ColumnName);
}
bcp.NotifyAfter = 2000;
bcp.SqlRowsCopied += new SqlRowsCopiedEventHandler(bcp_SqlRowsCopied);
bcp.WriteToServer(dt);
bcp.Close();
}
}