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樓主 MStone Lin 
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請問 gridview加上排序圖示 一直無法顯示 是少了設定什麼?? test.aspx <asp:GridView ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" > <Columns> <asp:BoundField DataField="主辦單位" HeaderText="主辦單位" SortExpression="主辦單位" /> <asp:BoundField DataField="類別" HeaderText="類別" SortExpression="類別" /> ..... </Columns> </asp:GridView> <asp:SqlDataSource ID="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:WebDataConnectionString %>" ></asp:SqlDataSource> test.aspx.vb Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load If Not IsPostBack Then ViewState("SortExpression") = "收文日" '設定預設的排序欄位 ViewState("SortDirection") = SortDirection.Ascending ' 設定預設的排序方式 End If dbview() End Sub Sub dbview() Dim sqlstr As String = "select a.primarydep as 主辦單位,a.docgrp as 類別,....." SqlDataSource1.SelectCommand = sqlstr Dim dv As DataView = SqlDataSource1.Select(New DataSourceSelectArguments()) dv.Sort = String.Format("{0} {1}", ViewState("SortExpression").ToString(), If(DirectCast(ViewState("SortDirection"), SortDirection) = SortDirection.Ascending, "ASC", "DESC")) GridView1.DataSource = dv 'GridView GridView1.DataBind() End Sub Protected Sub GridView1_PageIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles GridView1.PageIndexChanged dbview() End Sub Protected Sub GridView1_PageIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewPageEventArgs) Handles GridView1.PageIndexChanging GridView1.PageIndex = e.NewPageIndex End Sub Private Sub GridView1_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles GridView1.PreRender dbview() MyBase.OnPreRender(e) End Sub Protected Sub GridView1_Sorting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewSortEventArgs) Handles GridView1.Sorting ViewState("SortExpression") = e.SortExpression If ViewState("SortExpression").ToString() = e.SortExpression Then ViewState("SortDirection") = If(DirectCast(ViewState("SortDirection"), SortDirection) = SortDirection.Ascending, SortDirection.Descending, SortDirection.Ascending) Else ViewState("SortDirection") = SortDirection.Ascending End If End Sub Protected Sub GridView1_RowCreated(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowCreated If e.Row.RowType = DataControlRowType.Header Then For Each field As DataControlField In GridView1.Columns If GridView1.SortExpression <> "" And field.SortExpression = GridView1.SortExpression Then If GridView1.SortDirection = SortDirection.Ascending Then e.Row.Cells(GridView1.Columns.IndexOf(field)).Controls.Add(New LiteralControl(" ▲")) Else e.Row.Cells(GridView1.Columns.IndexOf(field)).Controls.Add(New LiteralControl(" ▼")) End If End If Next End If End Sub 我是參考這篇 https://dotblogs.com.tw/621122/2013/09/02/116139 但其中並於header的cells中加入literal或img的控制項 不懂.... 且gridview1.sortexpression 一直是空值 請問那邊少加了什麼嗎 謝謝 |
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試試看這個
在 GridView 中對欄位進行排序時顯示上下箭頭 https://dotblogs.com.tw/johnny/2013/12/23/135675 另外，往後請您貼程式碼的時候 多多利用程式碼標 不然我們會看很眼花，無法更直覺幫你看錯誤在哪
本篇文章回覆於2016-05-03 10:02
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MStone Lin
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我的主機還未升級至asp4.0 還使用asp2.0(win2000+iis6) ...
本篇文章回覆於2016-05-03 15:44
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Protected Sub GridView1_RowCreated(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowCreated
If e.Row.RowType = DataControlRowType.Header Then For Each field As DataControlField In GridView1.Columns If ViewState("SortExpression") <> "" And field.SortExpression = ViewState("SortExpression") Then If ViewState("SortDirection") = SortDirection.Ascending Then e.Row.Cells(GridView1.Columns.IndexOf(field)).Controls.Add(New LiteralControl(" ▲")) Else e.Row.Cells(GridView1.Columns.IndexOf(field)).Controls.Add(New LiteralControl(" ▼")) End If End If Next End If End Sub
本篇文章回覆於2018-08-03 17:11
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