Question

I wonder if it is possible to add or attach or extend the asp.net checkbox in a way to add OnCommand , CommandName, CommandArgument functionality.

In brief I want to add to a asp. net CheckBox the OnCommand functionality like Button or LinkButton has.

I want to place a check box in a Repeater ItemTemplate and want to handle on checkbox clicks in OnItemCommand handler.

Answer 1

I solved my problem using a simple trick. I created a web user control using a checkbox and invisible link button.

<asp:CheckBox ID="cbSelector" runat="server" AutoPostBack="true" />
<asp:LinkButton ID="btnHiddenCheckBox" runat="server" Visible="false" CommandName="Select"></asp:LinkButton>

in the code behind i added some event handlers …

  protected void Page_Load(object sender, EventArgs e)
  {
     cbSelector.CheckedChanged += new EventHandler(cbSelector_CheckedChanged);
  }

  void cbSelector_CheckedChanged(object sender, EventArgs e)
  {
      btnHiddenCheckBox.CommandName = "Select";
      btnHiddenCheckBox.CommandArgument = Convert.ToString(cbSelector.Checked);
      ((IPostBackEventHandler)btnHiddenCheckBox).RaisePostBackEvent(null);
  }

and programmatically raised a Click event with parameters and it works.