问题描述
我正在使用 .NET 并使用 sqldataadapter 从一个数据源获取数据并更新另一个数据源。但问题是每次在目标表中插入重复的行。
Dim sqlconl As sqlConnection = New sqlConnection(conl) --LOCAL sql CONNECTION
Dim sqlconr As sqlConnection = New sqlConnection(conr) --REMOTE sql CONNECTION
Dim dsl As New DataSet() --DSL AS DATASET
Dim dal As New sqlDataAdapter() --DAL AS sqlDATAADAPTER
dal.SelectCommand = New sqlCommand("select * from TxnDependents where Personalized='1'",sqlconl)
dal.AcceptChangesDuringFill = False
dal.Fill(dsl,"TxnDependents")`
Dim dar1 As New sqlDataAdapter("select * from TxnDependents",sqlconr)
Dim U1 As sqlCommandBuilder = New sqlCommandBuilder(dar1)
dar1.Update(dsl,"TxnDependents")
dsl.dispose()
dal.dispose()
解决方法
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