Dynamically Swapped UserControl: EventListeners of Buttons of UserControls are not firing RSS

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  TapasBose_Ed...

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  Dynamically Swapped UserControl: EventListeners of Buttons of UserControls are not firing

  Apr 15, 2012 01:42 PM|LINK

  I have two links, User Settings, Space Settings and two UserControls, UserSettings and SpaceSettings

  What I want to do:

  • On first time when user will visit the page he will see the User Settings.
  • Depending on which one of these two links has been clicked, the PlaceHolder will swap UserControl.
  • EventListeners of Buttons of UserControls should fired.

  So I wrote the

  SiteSettings.aspx:

  <asp:UpdatePanel runat="server">
          <ContentTemplate>
              <asp:Panel ID="Panel1" runat="server">
                  <asp:LinkButton ID="UserLink" runat="server" OnClientClick="$('#MainContent_JYM').val('User');"
                      OnCommand="SettingsLink_OnCommand" CommandName="User" Text="User Settings" />
              </asp:Panel>
              <asp:Panel ID="Panel2" runat="server">
                  <asp:LinkButton ID="SpaceLink" runat="server" OnClientClick="$('#MainContent_JYM').val('Space');"
                      OnCommand="SettingsLink_OnCommand" CommandName="Space" Text="Space Settings" />
              </asp:Panel>
              <asp:Panel ID="PlaceHolderPanel" runat="server" Style="min-height: 500px">
                  <asp:PlaceHolder runat="server" ID="SettingsPlaceholder" />
              </asp:Panel>
              <asp:HiddenField runat="server" ID="JYM" />
          </ContentTemplate>
      </asp:UpdatePanel>

  UserSettings.ascx:

      <asp:Panel runat="server">    
           <asp:Button runat="server" ID="User" Text="User" onclick="UserSettingsButton_Click" />
      </asp:Panel>

   SpaceSettings.ascx:

     <asp:Panel runat="server">    
          <asp:Button runat="server" ID="Space" Text="Space" onclick="SpaceSettingsButton_Click" />
     </asp:Panel>

  SiteSettings.ascx.cs:

     public partial class SiteSettings : Page {	
  
  		protected void Page_Load(object sender, EventArgs e) {
  			string key = JYM.Value;
  			if (key == null || key.Trim().Length == 0) {
  				AddUserSettings();
  			} else {
  				if (key.Equals("User")) {			
  					AddUserSettings();
  				} else {			
  					AddSpaceSettings();
  				}
  			}
  		}
  	
  		protected void SettingsLink_OnCommand(object sender, CommandEventArgs commandEventArgs) {	    
  			switch (commandEventArgs.CommandName) {
  				case "User":
  					AddUserSettings();
  					break;		   
  				case "Space":
  					AddSpaceSettings();
  					break;
  			}
  		}
  
  		private void AddUserSettings() {
  			AddSettings(LoadControl("~/UserControls/UserSettings.ascx") as UserSettings);
  		}
  
  		private void AddSpaceSettings() {
  			AddSettings(LoadControl("~/UserControls/SpaceSettings.ascx") as SpaceSettings);
  		}
  
  		private void AddSettings(UserControl control) {
  			SettingsPlaceholder.Controls.Clear();
  			SettingsPlaceholder.Controls.Add(control);
  		}
      }

  SpaceSettings.ascx.cs:

      public partial class SpaceSettings : Spring.Web.UI.UserControl {
  
  	protected void SpaceSettingsButton_Click(object sender, EventArgs e) {
  	    System.Diagnostics.Debug.WriteLine("SpaceSettings--------------");
  	}
      }

  UserSettings.ascx.cs:

      public partial class SpaceSettings : Spring.Web.UI.UserControl {
  
  	protected void SpaceSettingsButton_Click(object sender, EventArgs e) {
  	    System.Diagnostics.Debug.WriteLine("UserSettings--------------");
  	}
      }

  Now everything is fine, excpet the EventListeners correspond to the User button of UserSettings and Space button of SpaceSettings, are fireing on seond time and so on clicking.

  How can I solve this problem?

  Thanks.

  • Edited by TapasBose_Edifixio on Apr 15, 2012 01:43 PM
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  TapasBose_Ed...

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  2 Posts

  Re: Dynamically Swapped UserControl: EventListeners of Buttons of UserControls are not firing

  Apr 15, 2012 02:40 PM|LINK

  I found the soultion. The problem is the ID of UserControlbeing added. I have modified two methods AddUserSettings and AddSpaceSettings in the following way:

  private void AddUserSettings() {
  	UserSettings settings = LoadControl("~/UserControls/UserSettings.ascx") as UserSettings;
  	settings.ID = "usersetting";
  	AddSettings(settings);
  }
  
  private void AddSpaceSettings() {
  	SpaceSettings settings = LoadControl("~/UserControls/SpaceSettings.ascx") as SpaceSettings;
  	settings.ID = "spacesettings";
  	AddSettings(settings);
  }

  Now it is working.
  
  

  • Marked as answer by decker dong - msft on Apr 17, 2012 01:45 AM
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  Decker Dong ...

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  Re: Dynamically Swapped UserControl: EventListeners of Buttons of UserControls are not firing

  Apr 17, 2012 01:45 AM|LINK

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