在UpdatePanel中的GridView頁面下降1行

Question

我有一個基本的網格視圖啓用分頁。我在數據庫中有11行，gridview的頁面大小爲10.當我來到頁面時，它顯示了10行，而在我的分頁器中，它在第一頁顯示了我的鏈接，並顯示了第二頁的鏈接。當我點擊第二頁時，它刷新頁面並進入第2頁，並顯示第11行，孤獨的行。

但是，當我在它周圍放置更新面板時，會丟棄最後一行。當我來到頁面時，它顯示與沒有更新面板相同的內容。它在尋呼機上顯示10行，第1頁和第2頁。然而，當我點擊第2頁時，它確實是ajax的東西，但不顯示第二頁上的最後一條記錄。然後，如果我從第2頁返回到第1頁，它只顯示9行而不是顯示的10行。

出於某種原因，當我有一個更新面板圍繞我的gridview，頁面一次後，它從不顯示最後一行。我嘗試了RenderMode，ChildrenAsTriggers和UpdateMode的所有不同組合，但都無濟於事。我也在頁面上有一個表單，它允許你在更新面板中添加新的行到數據庫中，因此Gridview中也有一個編輯和刪除鏈接。當我通過表單或編輯/刪除添加一個新行時，這不會發生......它只發生在我頁面時。

任何想法，爲什麼gridview不會顯示最後一個記錄/行後，我只有當頁面更新面板內？

這裏是代碼...

ASPX

<asp:UpdatePanel runat="server" ID="uPnl" ChildrenAsTriggers="true" RenderMode="Block" UpdateMode="Always"> 
      <ContentTemplate> 
       <asp:Panel runat="server" ID="pnlAddComment" CssClass="addComment" DefaultButton="btnSubmitComment"> 
        <h1 class="postComment">Post Comment</h1> 
        <asp:TextBox runat="server" ID="txtName" CssClass="txtName"></asp:TextBox> 
        <ajaxToolkit:TextBoxWatermarkExtender ID="txtNameW" runat="server" 
          TargetControlID="txtName" 
          WatermarkText="- Type your name here -" 
          WatermarkCssClass="txtNameWatermark" /> 
        <asp:RequiredFieldValidator runat="server" ID="reqName" ControlToValidate="txtName" Display="Dynamic" ErrorMessage="Please enter your name" ValidationGroup="comment"></asp:RequiredFieldValidator> 
        <asp:TextBox runat="server" ID="txtComment" TextMode="MultiLine" CssClass="txtComment"></asp:TextBox> 
        <ajaxToolkit:TextBoxWatermarkExtender ID="TBWE2" runat="server" 
          TargetControlID="txtComment" 
          WatermarkText="- Write anything you'd like about this event -" 
          WatermarkCssClass="txtCommentWatermark" /> 
        <asp:RequiredFieldValidator runat="server" ID="reqComment" ControlToValidate="txtComment" Display="Dynamic" ErrorMessage="Please enter your comment" ValidationGroup="comment"></asp:RequiredFieldValidator> 
        <div class="buttons"> 
        <asp:Button runat="server" ID="btnSubmitComment" ValidationGroup="comment" Text="Submit Comment" /> 
        <span class="loader">Saving</span>         
       </asp:Panel> 
       <h1>Recent Comments</h1> 
       <a name="comments">&nbsp;</a> 
       <asp:GridView runat="server" ID="gvComments" DataKeyNames="CommentID" PagerSettings-Position="TopAndBottom" AllowPaging="true" PageSize="10" AutoGenerateColumns="false" GridLines="None" CssClass="comments"> 
        <Columns> 
         <asp:TemplateField> 
          <ItemTemplate> 
           <div class="comment user"> 
            <p> 
             <img src="images/icon.gif" width="46" height="55" /> 
             <%#Eval("UserComment")%> 
             <span> 
              Posted by <%#Eval("UserName")%> <br/> 
              on <%#Format(Eval("DateCreated"), "MM/dd/yyyy")%> at <%#Format(Eval("DateCreated"), "h:mm tt")%> 
             </span> 
             <asp:LinkButton runat="server" CausesValidation="false" ID="lnkEdit" CssClass="edit" CommandName="Edit" Text="Edit"></asp:LinkButton> 
             <asp:LinkButton runat="server" ID="lnkDelete" CommandArgument='<%#Eval("CommentID")%>' CssClass="delete" OnClientClick="return confirm('Are you sure you want to delete this comment?');" CausesValidation="false" OnClick="DeleteComment" Text="Delete"></asp:LinkButton> 
            </p> 
           </div>       
          </ItemTemplate> 
          <EditItemTemplate> 
           <div class="comment user"> 
            <p> 
             <img src="images/icon.gif" width="46" height="55" /> 
             <label>Name:</label> 
             <asp:TextBox runat="server" ID="txtNameEdit" Width="240" Text='<%#Eval("UserName")%>'></asp:TextBox><br /> 
             <label>Comment:</label> 
             <asp:TextBox runat="server" TextMode="MultiLine" ID="txtCommentEdit" Width="240" Height="100" Text='<%#Eval("UserComment") %>'></asp:TextBox> 
             <asp:LinkButton runat="server" ID="lnkCancel" CommandName="Cancel" CssClass="cancel" CausesValidation="false" Text="Cancel"></asp:LinkButton> 
             <asp:LinkButton runat="server" ID="lnkUpdate" CommandName="Update" CssClass="update" CausesValidation="false" Text="Update"></asp:LinkButton> 
            </p> 
           </div>  
          </EditItemTemplate> 
         </asp:TemplateField> 
        </Columns> 
        <PagerStyle CssClass="grdFooter" HorizontalAlign="right" /> 
        <PagerSettings PageButtonCount="7" /> 
       </asp:GridView> 
      </ContentTemplate> 
     </asp:UpdatePanel> 

VB代碼背後

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load 
    If Not IsPostBack Then 
     bindComments() 
    End If 
End Sub 
Private Sub bindComments() 
    gvComments.DataSource = dataaccess.getdataset("SELECT * FROM Comments ORDER BY DateCreated DESC", Data.CommandType.Text) 
    gvComments.DataBind() 
End Sub 
Protected Sub gvComments_RowEditing(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewEditEventArgs) Handles gvComments.RowEditing 
    gvComments.EditIndex = e.NewEditIndex 
    bindComments() 
End Sub 
Protected Sub gvComments_RowCancelingEdit(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewCancelEditEventArgs) Handles gvComments.RowCancelingEdit 
    gvComments.EditIndex = -1 
    bindComments() 
End Sub 
Protected Sub gvComments_PageIndexChanging(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewPageEventArgs) Handles gvComments.PageIndexChanging 
    gvComments.PageIndex = e.NewPageIndex 
    bindComments() 
End Sub 
Protected Sub btnSubmitComment_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmitComment.Click 
    Dim userType As String = "attendee" 
    If Not IsNothing(Request.QueryString("user")) AndAlso Request.QueryString("user").Length > 0 Then 
     userType = Request.QueryString("user") 
    End If 
    dataaccess.NoReturnQuery("INSERT INTO Comments (UserName, UserComment, UserType) VALUES ('" & txtName.Text.Replace("'", "''") & "','" & txtComment.Text.Replace("'", "''").Replace(vbCrLf, "<br />") & "','" & userType & "')", Data.CommandType.Text) 
    txtComment.Text = "" 
    txtName.Text = "" 
    gvComments.PageIndex = 0 
    bindComments() 
End Sub 
Sub DeleteComment(ByVal sender As Object, ByVal e As System.EventArgs) 
    Dim lnk As LinkButton = TryCast(sender, LinkButton) 
    If Not IsNothing(lnk) AndAlso IsNumeric(lnk.CommandArgument) Then 
     dataaccess.NoReturnQuery("DELETE FROM Comments WHERE CommentID = " & lnk.CommandArgument, Data.CommandType.Text) 
     bindComments() 
    End If 
End Sub 
Protected Sub gvComments_RowUpdating(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewUpdateEventArgs) Handles gvComments.RowUpdating 
    Dim row As GridViewRow = gvComments.Rows(e.RowIndex) 
    Dim txtCommentEdit As TextBox = CType(row.FindControl("txtCommentEdit"), TextBox) 
    Dim txtNameEdit As TextBox = CType(row.FindControl("txtNameEdit"), TextBox) 
    dataaccess.NoReturnQuery("UPDATE Comments SET UserComment = '" & txtCommentEdit.Text.Replace("'", "''").Replace(vbCrLf, "<br />") & "', UserName = '" & txtNameEdit.Text.Replace("'", "''") & "' WHERE CommentID = " & gvComments.DataKeys(e.RowIndex).Value, Data.CommandType.Text) 
    gvComments.EditIndex = -1 
    bindComments() 
End Sub 
Protected Sub gvComments_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles gvComments.RowDataBound 
    Dim lnkDelete As LinkButton = CType(e.Row.FindControl("lnkDelete"), LinkButton) 
    If Not IsNothing(lnkDelete) Then 
     If Request.QueryString("user") = "admin" Then 
      lnkDelete.Visible = True 
     Else 
      lnkDelete.Visible = False 
     End If 
    End If 
    Dim lnkEdit As LinkButton = CType(e.Row.FindControl("lnkEdit"), LinkButton) 
    If Not IsNothing(lnkEdit) Then 
     If Request.QueryString("user") = "admin" Then 
      lnkEdit.Visible = True 
     Else 
      lnkEdit.Visible = False 
     End If 
    End If 
End Sub 

Answer 1

從代碼隱藏在Page_Load中試試這個：

ScriptManager.RegisterAsyncPostBackControl(gvComments);