在某些行中排除列 - SQL/Asp.Net

Question

我想更改一些爲我寫的代碼。我想省略顯示，其中tblResults.videoLink =「」

超鏈接將顯示在表格中的「視頻鏈接」，使人們可以點擊它的超鏈接。我只希望單詞/超鏈接「視頻鏈接」出現在人們輸入的行中。

的代碼是微軟SQL，但是寫在ASPX文件。後端是VB，但有VB是相當多的空.. ASPX文件處理一切......

<h1>Recent Results</h1> 
    <asp:Panel ID="pnlMyWishes" runat="server"> 

     <asp:SqlDataSource ID="DSWishes" runat="server" ConnectionString="<%$ ConnectionStrings:DBConnectionString %>" SelectCommand="SELECT  TOP (100) PERCENT tblResults.wishID, tblResults.Player1AccountID, tblResults.Player2AccountID, tblResults.Player1Result, tblResults.Player2Result, tblResults.venue, tblResults.potSize, tblResults.player1Name, tblResults.player2Name, tblResults.videoLink, tblResults.date FROM tblResults ORDER BY tblResults.date DESC"> 
     </asp:SqlDataSource> 
     <asp:GridView ID="gdvWishes" width="100%" runat="server" AllowPaging="True" AutoGenerateColumns="False" CssClass="mGrid" DataKeyNames="wishID" DataSourceID="DSWishes" PageSize="20" AllowSorting="True"> 
      <AlternatingRowStyle CssClass="alt" /> 
      <Columns> 

       <asp:BoundField DataField="player1Name" HeaderText="Player 1" />  
       <asp:TemplateField HeaderText="Result"> 
        <ItemTemplate> 
         <asp:Label ID="lblP1" Text='<%# Eval("player1Result").ToString %>' runat="server" Visible="true"> 
         </asp:Label><asp:Label ID="lblVs" Text=" - " runat="server" Visible="true"></asp:Label> 
         <asp:Label ID="lblP2" Text='<%# Eval("player2Result").ToString %>' runat="server" Visible="true"></asp:Label> 
        </ItemTemplate> 
        <ItemStyle Width="17%" /> 
       </asp:TemplateField> 
       <asp:BoundField DataField="player2Name" HeaderText="Player 2" /> 

       <asp:BoundField DataField="potSize" HeaderText="Pot" /> 
       <asp:BoundField DataField="venue" HeaderText="Venue" /> 
       <asp:TemplateField ShowHeader="False"> 
        <ItemTemplate> 
         <asp:HyperLink ID="hypVideoLink" runat="server" NavigateUrl='<%# Eval("videoLink").ToString %>'>Video Link</asp:HyperLink> 
        </ItemTemplate> 
       </asp:TemplateField> 
      </Columns> 
     </asp:GridView> 
    </asp:Panel> 

Answer 1

創建一個子像下面，與數據填充您的GridView的代碼之後調用它。

Private Sub HideBlankURLs() 
    For Each r As GridViewRow in gdvWishes.Rows 
     If r.RowType = DataControlRowType.DataRow Then //Execute the code only for datarow, excluding footer and header 
      Dim hypURL As HyperLink 
      hypURL = r.Cells(5).FindControl("hypVideoLink") //Goes to the column of VideoURL, index 5 is counting from 0 to 5 
      If hypURL.NavigateURL = "" Then //Checks if the URL is blank, if it is then hide the hyperlink control 
       hypURL.Visible = False 
      End If 
     End If 
    Next r 
End Sub 

這將遍歷所有行並查找該列中的控件，檢查導航URL是否爲空，然後隱藏該控件。

注意：更換（//）用單引號（'），因爲這麼把它讀成文本封閉字符，而不是評論。