Asp.net syntax error for Command Argument in linkbutton

Question

I am trying to use linkbutton inside of foreach in asp.net

I have below html.

Asp.net html:

<table border="1" style="grid-cell: inherit; border-spacing: inherit;">
                    <thead>
                        <tr>
                            <th>İlan ID
                            </th>
                            <th>İlan Yolu
                            </th>
                            <th>Eklenme Tarihi
                            </th>
                            <th>İlk Güncelleme Tarihi
                            </th>
                            <th>Güncelleme Aralığı
                            </th>
                            <th>Son Güncelleme Tarihi
                            </th>
                            <th>Aktifmi
                            </th>
                            <th>Detay Göster
                            </th>
                        </tr>
                    </thead>
                    <%foreach (var item in list)
                      {%>
                    <tr>
                        <td style="text-align: center">
                            <span><%= item.Id%>    </span>
                        </td>
                        <td>
                            <span><%=item.DosyaAdi %></span>
                        </td>
                        <td style="text-align: center">
                            <span><%=item.EklemeTarihi %></span>
                        </td>
                        <td>
                            <span><%=item.IlkGuncellemeTarihi %></span>
                        </td>
                        <td style="text-align: center">
                            <span><%=item.GuncellemeAraligi %></span>
                        </td>
                        <td style="text-align: center">
                            <span><%=item.SonGuncelleme %></span>
                        </td>
                        <td style="text-align: center">
                            <input type="checkbox" class="chk" id="<%=item.Id %>" <%= item.Aktif ==true ? "checked='checked'" : "" %> />
                        </td>
                        <td style="text-align: center">
                            <asp:LinkButton ID="lbdetay" runat="server" OnClick="lbdetay_Click" CommandArgument="<%=item.Id%>" CommandName="Detay">Detay</asp:LinkButton>
                        </td>
                    </tr>

                    <%  } %>
                </table>

Question:

In part of linkbutton as below

  <asp:LinkButton ID="lbdetay" runat="server" OnClick="lbdetay_Click" CommandArgument="<%=item.Id%>" CommandName="Detay">Detay</asp:LinkButton>

If i use CommandArgument="<%=item.Id%>" it is not working (it displays syntax error here)

Where i miss inside of code for command argument in linkbutton side ?

Any help will be appreciated.

Thanks

Answer 1

<%= %> is equivalent to Response.Write, it outputs directly to the html markup. So it cannot write to server-side controls at all, since it does not know about them. In other words, what you are trying to do is impossible.

You should probably consider refactoring this foreach to Repeater, which gives control over controls as well as html:

<asp:Repeater runat="server" ID="Repeater1">
    <ItemTemplate>
        <td style="text-align: center">
            <span><%# Eval("Id") %></span>
        </td>
        ... same for other tds ...
        <td style="text-align: center">
            <asp:LinkButton ID="lbdetay" runat="server" OnClick="lbdetay_Click" CommandArgument='<%# Eval("Id") %>' CommandName="Detay">Detay</asp:LinkButton>
        </td>
    </ItemTemplate>
</asp:Repeater>

And don't forget to data bind it:

Repeater1.DataSource = list;
Repeater1.DataBind();