在列標題中的Gridview排序向上/向下箭頭

我目前正在處理一些正在照顧排序和分頁數據在GridView中的代碼。我現在試圖實現排序箭頭（列標題旁邊的向上/向下箭頭），但我沒有成功。實現排序箭頭的代碼位於* GridView1_RowCreated *子例程中。現在，當我運行代碼時，根本沒有看到排序箭頭。有問題的行是以下一行：「如果tblAdministrators.SortExpression = lnk.CommandArgument然後」我無法弄清楚那一行有什麼問題。它總是錯誤因此箭頭不顯示。在列標題中的Gridview排序向上/向下箭頭

Private Function GetData(sort As SortDirection) As Data.DataView 

    Dim connection As OracleDBConnect = DAL.GetOracleDBConnection() 
    Dim request As OracleDBRequest = Nothing 
    Dim result As OracleDBResult = Nothing 
    Dim trace As OracleDBChronoTrace = Nothing 
    Dim status As DBStatus 
    Dim sb As New StringBuilder 
    Dim dv As DataView 

    With sb 
     .Append("SELECT * FROM USERS") 
    End With 

    request = New OracleDBRequest(sb.ToString, CommandType.Text) 

    status = connection.Execute(request, result, trace) 

    dv = New DataView(result.DataSet.Tables(0)) 

    If (ViewState("sortExp") IsNot Nothing) Then 
     dv = New Data.DataView(result.DataSet.Tables(0)) 

     If (GridViewSortDirection = SortDirection.Ascending) Then 
      GridViewSortDirection = SortDirection.Descending 
      dv.Sort = CType(ViewState("sortExp").ToString() & DESCENDING, String) 
     Else 
      GridViewSortDirection = SortDirection.Ascending 
      dv.Sort = CType(ViewState("sortExp").ToString() & ASCENDING, String) 
     End If 
    Else 
     dv = result.DataSet.Tables(0).DefaultView 
    End If 

    Return dv 

End Function 


Public Property GridViewSortDirection() As SortDirection 
    Get 
     If ViewState("sortDir") Is Nothing Then 
      ViewState("sortDir") = SortDirection.Ascending 
     End If 

     Return CType(ViewState("sortDir"), SortDirection) 
    End Get 

    Set(ByVal value As SortDirection) 
     ViewState("sortDir") = value 
    End Set 

End Property 


Protected Sub GridView1_PageIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewPageEventArgs) Handles tblAdministrators.PageIndexChanging 

    tblAdministrators.PageIndex = e.NewPageIndex 
    GridViewSortDirection = If(GridViewSortDirection = SortDirection.Descending, SortDirection.Ascending, SortDirection.Descending) 
    tblAdministrators.DataSource = GetData(GridViewSortDirection) 
    tblAdministrators.DataBind() 

End Sub 


Protected Sub GridView1_Sorting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewSortEventArgs) Handles tblAdministrators.Sorting 

    ViewState("sortExp") = e.SortExpression 
    tblAdministrators.DataSource = GetData(GridViewSortDirection) 
    tblAdministrators.DataBind() 

End Sub 

Protected Sub GridView1_RowCreated(sender As Object, e As GridViewRowEventArgs) Handles tblAdministrators.RowCreated 
    If e.Row.RowType = DataControlRowType.Header Then 
     For Each tc As TableCell In e.Row.Cells 
      If tc.HasControls() Then 

       Dim lnk As LinkButton = DirectCast(tc.Controls(0), LinkButton) 
       If lnk IsNot Nothing Then 

        Dim img As New System.Web.UI.WebControls.Image() 

        img.ImageUrl = "/images/" & (If(GridViewSortDirection = SortDirection.Ascending, "asc", "desc")) & ".gif" 

        If tblAdministrators.SortExpression = lnk.CommandArgument Then 

         tc.Controls.Add(New LiteralControl(" ")) 
         tc.Controls.Add(img) 

        End If 
       End If 
      End If 
     Next 
    End If 
End Sub

ASPX代碼：

<asp:GridView ID="tblAdministrators" runat="server" AutoGenerateColumns="false" EmptyDataText="No records found" PageSize="25" AllowPaging="True" AllowSorting="True" OnRowCreated="GridView1_RowCreated"> 
     <Columns> 
      <asp:BoundField HeaderText="Name" DataField="Name" SortExpression="NAME"></asp:BoundField> 
     </Columns> 
     <Columns> 
      <asp:BoundField HeaderText="City" DataField="City" SortExpression="CITY"></asp:BoundField> 
     </Columns> 
    </asp:GridView>

來源

2012-10-03 Mark Marina

看看我的樣本：

<asp:GridView ID="GridView1" runat="server" AllowPaging="True" 
    AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="CustomerId" 
    DataSourceID="SqlDataSource1"> 
    <SortedAscendingHeaderStyle CssClass="sortasc" /> 
    <SortedDescendingHeaderStyle CssClass="sortdesc" /> 
    <Columns> 
     <asp:CommandField ShowSelectButton="True" /> 
     <asp:BoundField DataField="CustomerId" HeaderText="CustomerId" 
      InsertVisible="False" ReadOnly="True" SortExpression="CustomerId" /> 
     <asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" /> 
     <asp:BoundField DataField="IdNumber" HeaderText="IdNumber" 
      SortExpression="IdNumber" /> 
    </Columns> 
</asp:GridView>

多多關注SortedAscendingHeaderStyle和SortedDescendingHeaderStyle。只需用背景圖像創建合適的css類（向上箭頭和向下箭頭）即可完成。

來源

2012-10-03 15:43:36

格雷戈爾。這隻會在使用SQLDataSource時不起作用。如果它能起作用，那將是非常好的，因爲它很容易實現。 –

這只是一個示例數據源。它也應該適用於任何其他數據源類型。 –

爲了使用這些函數（SortedAscendingHeaderStyle等等），「DataSourceID」是強制性的。在我的代碼中，我沒有使用數據源控件，但我寧願做一個手動數據綁定。 –

要想在數據網格中添加排序箭頭一個VB.net Windows窗體上，你甚至不用編寫任何代碼

在設計模式形式 - 選擇您的網格右鍵點擊屬性，設置選擇模式=單元格選擇
在設計模式窗體上 - 單擊右上方網格上的箭頭，編輯列屬性，選擇編輯或添加列，設置SortMode = Automatic
如果您有單元格內容的代碼（例如，您希望用戶在單擊數據網格中的任何行時打開其他表單），請使用CellDouble點擊屬性來處理事件。如果您已經使用單一的點擊則按照頭也打開窗體爲特定小區

私人小組_CellDoubleClick（發送者爲對象，E作爲DataGridViewCellEventArgs）處理DGAcctGrpList.CellDoubleClick

來源

2015-05-28 15:33:22

在列標題中的Gridview排序向上/向下箭頭

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