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找不到明確的答案,但我需要確定。我有以下代碼:Dim DataTable = DataSet.Tables(TableName) - 複製或引用?
Dim daMyInfo As New SqlDataAdapter("select * from [" & TableName & "] (nolock)", objConn)
Dim dsMyInfo As New DataSet("MyInfo")
...
daMyInfo.FillSchema(dsMyInfo, SchemaType.Source, TableName)
daMyInfo.Fill(dsMyInfo, TableName)
Dim dtMyInfo As DataTable = dsMyInfo.Tables(TableName)
代碼後來,我有:
For Each NewRow As DataRow In dtMyInfoAdd.Rows
dtMyInfo.ImportRow(NewRow)
Next
Dim objCommandBuilder As New SqlCommandBuilder(daMyInfo)
daMyInfo.Update(dsMyInfo, TableName)
我假設這意味着dtMyInfo
實際上只是在同一個對象指向dsMyInfo.Tables(TableName)
,但我不確定,而且我更加不確定,因爲我沒有在MS站點的任何地方發現這個提及的參考。
如果您不確定,只需在dsMyInfo.Tables中添加它們後在dtMyInfo中計數行數 – 2014-12-02 16:50:30
使用** [Is](http://msdn.microsoft.com/en-us/library/ kb136x1y.aspx)**運算符來比較引用。 'Dim result As Boolean =(table1 is table2)' – 2014-12-02 17:07:59