如何在DataList控件內的ASP.NET中設置控件的可見性？

Question

我有兩個asp：ImageButton。 我想在每個表單元格上隱藏asp:ImageButton ID="ReceiveButton" ，僅當

"<%#Eval("StatusID")=="123" %> "像這樣

我不知道如何在.ASPX文件中編寫此條件語句。 我的代碼是這樣的。

<td>
      <%#Eval("StatusID")%>
</td>
<td align="center">

     <asp:ImageButton ID="ReceiveButton" ToolTip="Receive/process this aproved PO" runat="server"     
     ImageUrl="~/DesktopModules/HBI_PurchaseOrder/Assets/Images/receive.png" 
     CommandName="CommandReceived" />

    <asp:ImageButton ID="DetailButton" ToolTip="View Approved PO" runat="server" 
    ImageUrl="~/DesktopModules/HBI_PurchaseOrder/Assets/Images/view.png"  CommandName="PODetails" />

</td>

我嘗試過類似

<td>
      <%#Eval("StatusID")%>
</td>
<td align="center">

    <%if (Eval("StatusID") == "123") { %>
     <asp:ImageButton ID="ReceiveButton" ToolTip="Receive/process this aproved PO" runat="server"     
     ImageUrl="~/DesktopModules/HBI_PurchaseOrder/Assets/Images/receive.png" 
     CommandName="CommandReceived" />
    <%} %>

    <asp:ImageButton ID="DetailButton" ToolTip="View Approved PO" runat="server" 
    ImageUrl="~/DesktopModules/HBI_PurchaseOrder/Assets/Images/view.png"  CommandName="PODetails" />

</td>

但這是行不通的。 如何正確設置條件？ 請幫我。

Answer 1

您可以使用DataList Item ItemDataBound事件

protected void DatalistID_ItemDataBound(object sender, DataListItemEventArgs e) 
{
    HiddenField hfStatusID= e.Item.FindControl("hfStatusID") as HiddenField;
    ImageButton ReceiveButton= e.Item.FindControl("ReceiveButton") as ImageButton;
    if (hfStatusID!= null && ReceiveButton!=null)
    {
        if (hfStatusID.Value == "123") // As per your Requirement
        {
            ReceiveButton.Visible= false;
        }
    }
}

並在.aspx頁上將HiddenField設為：

<asp:HiddenField ID="hfStatusID" runat="server" Value='<%#Eval("StatusID")%>'/>

Answer 2

嘗試這個：

只需將Visible='<%# Eval("StatusID").ToString().Trim()=="123" %>'到控件的ReceiveButton屬性中即可。

<td>
  <%#Eval("StatusID")%>
</td>
<td align="center">

 <asp:ImageButton ID="ReceiveButton" ToolTip="Receive/process this aproved PO" runat="server"     
 ImageUrl="~/DesktopModules/HBI_PurchaseOrder/Assets/Images/receive.png" 
 CommandName="CommandReceived" Visible='<%# Eval("StatusID").ToString().Trim()=="123" %>' />

<asp:ImageButton ID="DetailButton" ToolTip="View Approved PO" runat="server" 
ImageUrl="~/DesktopModules/HBI_PurchaseOrder/Assets/Images/view.png"  CommandName="PODetails" />

</td>