本文整理汇总了VB.NET中System.Data.DataView.RowStateFilter属性的典型用法代码示例。如果您正苦于以下问题：VB.NET DataView.RowStateFilter属性的具体用法？VB.NET DataView.RowStateFilter怎么用？VB.NET DataView.RowStateFilter使用的例子？那么, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类System.Data.DataView的用法示例。
在下文中一共展示了DataView.RowStateFilter属性的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: DemonstrateRowState
Private Sub DemonstrateRowState()
Dim i As Integer
' Create a DataTable with one column.
Dim dataTable As New DataTable("dataTable")
Dim dataColumn As New DataColumn("dataColumn")
dataTable.Columns.Add(dataColumn)
' Add ten rows.
Dim dataRow As DataRow
For i = 0 To 9
dataRow = dataTable.NewRow()
dataRow("dataColumn") = "item " + i.ToString()
dataTable.Rows.Add(dataRow)
Next i
dataTable.AcceptChanges()
' Create a DataView with the table.
Dim dataView As New DataView(dataTable)
' Change one row's value:
dataTable.Rows(1)("dataColumn") = "Hello"
' Add one row:
dataRow = dataTable.NewRow()
dataRow("dataColumn") = "World"
dataTable.Rows.Add(dataRow)
' Set the RowStateFilter to display only Added and modified rows.
dataView.RowStateFilter = _
DataViewRowState.Added Or DataViewRowState.ModifiedCurrent
' Print those rows. Output = "Hello" "World";
PrintView(dataView, "ModifiedCurrent and Added")
' Set filter to display on originals of modified rows.
dataView.RowStateFilter = DataViewRowState.ModifiedOriginal
PrintView(dataView, "ModifiedOriginal")
' Delete three rows.
dataTable.Rows(1).Delete()
dataTable.Rows(2).Delete()
dataTable.Rows(3).Delete()
' Set the RowStateFilter to display only Added and modified rows.
dataView.RowStateFilter = DataViewRowState.Deleted
PrintView(dataView, "Deleted")
'Set filter to display only current.
dataView.RowStateFilter = DataViewRowState.CurrentRows
PrintView(dataView, "Current")
' Set filter to display only unchanged rows.
dataView.RowStateFilter = DataViewRowState.Unchanged
PrintView(dataView, "Unchanged")
' Set filter to display only original rows.
dataView.RowStateFilter = DataViewRowState.OriginalRows
PrintView(dataView, "OriginalRows")
End Sub
Private Sub PrintView(ByVal dataView As DataView, ByVal label As String)
Console.WriteLine(ControlChars.Cr + label)
Dim i As Integer
For i = 0 To dataView.Count - 1
Console.WriteLine(dataView(i)("dataColumn"))
Next i
End Sub