PostBack後, GridView的Pager 重設了.

• 問題

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  <table style="width: 970px" cellpadding="0" cellspacing="0" border="0">

  <tr>

  <td style='width: 100px'>

  </td>

  <td>

  <asp:TextBox ID="txtSearchTitle" runat="server" Height="20px" Width="280px" CssClass="field_search_input"></asp:TextBox>

  </td>

  <td rowspan="2" align="center">

  <asp:UpdatePanel ID="UpdatePanel_Input" runat="server" UpdateMode="Conditional">

  <Triggers>

  <asp:AsyncPostBackTrigger ControlID="btnSearch" />

  <asp:PostBackTrigger ControlID="btnReset" />

  </Triggers>

  <ContentTemplate>

  <asp:Button ID="btnSearch" runat="server" CssClass="button1" Text="Search" Width="88px" />

  <asp:Button ID="btnReset" runat="server" CssClass="button1" Font-Size="10pt" Text="Reset"

  Width="88px" CausesValidation="false" />

  </ContentTemplate>

  </asp:UpdatePanel>

  </td>

  </tr>

  </table>

  <asp:UpdatePanel ID="UpdatePanel_GridView" runat="server" UpdateMode="Conditional">

  <Triggers>

  <asp:AsyncPostBackTrigger ControlID="btnSearch" />

  </Triggers>

  <ContentTemplate>

  <asp:GridView ID="gdvList" runat="server" AllowPaging="True" AutoGenerateColumns="False"

  OnPageIndexChanging="PageIndexChanging" ForeColor="Black" CssClass="datatable"

  CellPadding="0" BorderWidth="0px" GridLines="None" Width="950px" Font-Size="10pt"

  PageSize="5" AllowSorting="False" PagerSettings-Mode="Numeric" PagerSettings-Position="Bottom">

  <Columns>

  <asp:TemplateField ItemStyle-Width="80px" ItemStyle-HorizontalAlign="Center" HeaderText="Name"

  Visible="false">

  <ItemTemplate>

  <asp:Label ID="lblLawNo" runat="server"><%#Eval("Name")%></asp:Label>

  </ItemTemplate>

  <ItemStyle HorizontalAlign="Center" Width="60px"></ItemStyle>

  </asp:TemplateField>

  <asp:TemplateField HeaderText="Document">

  <HeaderTemplate>

  </HeaderTemplate>

  <ItemTemplate>

  <asp:ImageButton ID="btnDocLink" runat="server" ImageUrl="~/Images/doc.gif" />

  <cc1:ModalPopupExtender ID="ModalPopupExtender_DocLink" runat="server" PopupControlID="DocPanel"

  BackgroundCssClass="modalBackground" TargetControlID="btnDocLink" CancelControlID="btnClose">

  </cc1:ModalPopupExtender>

  </ItemTemplate>

  <HeaderStyle />

  <ItemStyle HorizontalAlign="Center" Width="20px"></ItemStyle>

  </asp:TemplateField>

  </Columns>

  </asp:GridView>

  </ContentTemplate>

  </asp:UpdatePanel>

  <asp:Panel ID="panelUpdateProgress" runat="server" CssClass="updateProgress">

  <asp:UpdateProgress ID="UpdateProg1" DisplayAfter="0" runat="server" AssociatedUpdatePanelID="UpdatePanel_Input">

  <ProgressTemplate>

  <div style="position: relative; top: 30%; text-align: center;">

  <img src="Images/animated_loading.gif" style="vertical-align: middle" alt="Processing" />

  Processing ...

  </div>

  </ProgressTemplate>

  </asp:UpdateProgress>

  </asp:Panel>

  <cc1:ModalPopupExtender ID="ModalProgress" runat="server" TargetControlID="panelUpdateProgress"

  BackgroundCssClass="modalBackground" PopupControlID="panelUpdateProgress" />

  <asp:Panel ID="DocPanel" runat="server" Style="display: none;"

  Width="900px" Height="650" >

  <div class="footer" style="text-align:left">

  </div>

  <div class="footer" style="text-align:right">

  <asp:ImageButton ID="btnClose" runat="server" AlternateText="Close" ImageUrl="~/Images/CloseX.png" CausesValidation="false" Width="38px" Height="38px" OnClientClick="download('')"/>

  </div>

  <asp:Button ID="btnShowPopup" runat="server" Style="display: none" />

  <iframe id="DocFrame" Width="900px" Height="600"></iframe>

  </asp:Panel>

  ---------

  Protected Sub btnReset_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnReset.Click

  Me.txtSearchTitle.Text = String.Empty

  End Sub

  Protected Sub btnSearch_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSearch.Click

  ds = da.GetList(txtSearch.text)

  Me.gdvList.DataSource = ds.Tables(0).DataSet

  Me.gdvList.DataBind()

  End Sub

  Protected Sub gdvList_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles gdvList.RowDataBound

  If e.Row.RowType = DataControlRowType.Pager Then

  Dim pagerCell As TableCell

  pagerCell = CType(e.Row.Controls(0), TableCell)

  Dim txt As String

  Dim txtGoPage As String

  txtGoPage = "Page No:"

  txt = "<span><font size='2pt'>" & txtGoPage & "&nbsp;</font><span class=i>"

  pagerCell.Controls.AddAt(0, New LiteralControl(txt))

  pagerCell.Controls.AddAt(pagerCell.Controls.Count, New LiteralControl("</span></span>"))

  End If

  End SUb

  現在 btnReset 放UpdatePanel 外面, 按下btnReset後,  GridView的Pager ( Page NO: )  消失了.
  要再按 btnSearch  一次就再出現,
  
  如果 btnReset 放UpdatePanel 內面, 按下btnReset後,  GridView的Pager ( Page NO: )  沒有問題
  但 txtSearchTitle 的內容就不能設為空白.
  

  2009年3月26日 上午 06:39