gridview 翻页后保持排序
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Protected Sub gvdatalist_Sorting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewSortEventArgs) Handles gvdatalist.Sorting
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GridViewSortExpression = e.SortExpression
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Dim pageIndex As Integer = gvdatalist.PageIndex
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gvdatalist.DataSource = SortDataTable(dt, False)
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gvdatalist.DataBind()
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gvdatalist.PageIndex = pageIndex
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End Sub
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Private Property GridViewSortDirection() As String
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Get
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Return ViewState("SortDirection")
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End Get
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Set(ByVal Value As String)
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ViewState("SortDirection") = value
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End Set
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End Property
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Private Property GridViewSortExpression() As String
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Get
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Return ViewState("SortExpression")
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End Get
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Set(ByVal Value As String)
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ViewState("SortExpression") = value
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End Set
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End Property
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Private Function GetSortDirection() As String
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Select Case GridViewSortDirection
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Case "ASC"
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GridViewSortDirection = "DESC"
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'Exit Function
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Case "DESC"
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GridViewSortDirection = "ASC"
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' Exit Function
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Case Else
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GridViewSortDirection = "ASC"
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End Select
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Return GridViewSortDirection
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End Function
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Protected Function SortDataTable(ByVal dataTable As DataTable, ByVal isPageIndexChanging As Boolean) As DataView
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If Not dataTable Is Nothing Then
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Dim dataView As DataView = New DataView(dataTable)
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If GridViewSortExpression <> String.Empty Then
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If isPageIndexChanging Then
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dataView.Sort = String.Format("{0} {1}", GridViewSortExpression, GridViewSortDirection)
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Else
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dataView.Sort = String.Format("{0} {1}", GridViewSortExpression, GetSortDirection())
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End If
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End If
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Return dataView
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Else
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Return New DataView()
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End If
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End Function
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Protected Sub gvdatalist_PageIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewPageEventArgs) Handles gvdatalist.PageIndexChanging
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Me.gvdatalist.PageIndex = e.NewPageIndex
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Me.gvdatalist.DataSource = SortDataTable(dt, True)
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Me.gvdatalist.DataBind()
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Me.drto.SelectedValue = e.NewPageIndex + 1
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End Sub
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