在第二次回发后，按钮无法触发OnClick

我创建了一个网站，在所有页面后面都有一个MasterPage，然后是一个页面，该页面带有一个动态加载我的UserControl的菜单，并且内部有一个UserControl，它们具有菜单动态加载其他用户控件...在第二次回发后，按钮无法触发OnClick

我的问题是：UserControl的菜单，我第一次触发OnClick事件后，我无法再次触发它... 有人知道为什么吗？

代码如下：

页：

public partial class AboutBrazil : BasePage 
{ 
    private String LastLoadedControl_AboutBrazil 
    { 
     get 
     { 
      if (ViewState["LastLoadedControl_AboutBrazil"] != null) 
      { 
       return ViewState["LastLoadedControl_AboutBrazil"].ToString(); 
      } 
      else 
      { 
       return "~/UserControl/AboutBrazil/ucIntroduction.ascx"; 
      } 
     } 
     set 
     { 
      ViewState["LastLoadedControl_AboutBrazil"] = value; 
     } 
    } 

    private void LoadUserControl() 
    { 
     UserControl userControl = (UserControl)Page.LoadControl(LastLoadedControl_AboutBrazil); 

     phAboutBrazil.Controls.Clear(); 
     phAboutBrazil.Controls.Add(userControl); 

     userControl.ID = "myUserControl"; 
    } 

    protected void Page_Load(object sender, EventArgs e) 
    { 
     this.SetTitulo("About Brazil"); 

     LoadUserControl(); 
    } 

    protected void btnLoadUserControl_Click(object sender, EventArgs e) 
    { 
     System.Drawing.Color foreColorI = System.Drawing.Color.FromArgb(102, 102, 102); 
     System.Drawing.Color foreColorA = System.Drawing.Color.FromArgb(27, 41, 13); 

     Button btnSender = (Button)sender; 

     btnIntroduction.ForeColor = foreColorI; 
     btnHistory.ForeColor = foreColorI; 
     btnThePeople.ForeColor = foreColorI; 
     btnBrazilianRegions.ForeColor = foreColorI; 
     btnBrazilianEcosystem.ForeColor = foreColorI; 
     btnGeneralInformation.ForeColor = foreColorI; 
     btnTips.ForeColor = foreColorI; 

     switch (btnSender.CommandArgument) 
     { 
      case "Introduction": 
       btnSender.ForeColor = foreColorA; 

       LastLoadedControl_AboutBrazil = "~/UserControl/AboutBrazil/ucIntroduction.ascx"; 
       break; 
      case "History": 
       btnSender.ForeColor = foreColorA; 

       LastLoadedControl_AboutBrazil = "~/UserControl/AboutBrazil/ucHistory.ascx"; 
       break; 
      case "The People": 
       btnSender.ForeColor = foreColorA; 

       LastLoadedControl_AboutBrazil = "~/UserControl/AboutBrazil/ucThePeople.ascx"; 
       break; 
      case "The Brazilian Regions": 
       btnSender.ForeColor = foreColorA; 

       LastLoadedControl_AboutBrazil = "~/UserControl/AboutBrazil/ucTheBrazilianRegions.ascx"; 
       break; 
      default: 
       btnSender.ForeColor = foreColorA; 

       LastLoadedControl_AboutBrazil = "~/UserControl/AboutBrazil/ucIntroduction.ascx"; 
       break; 
     } 

     this.LoadUserControl(); 
    } 
}

所述第一用户控制：

 private List<String> listControl = new List<String>(new String[] { "Introduction", "North", "Northeast", "Middle-West", "South", "Southeast" }); 

    private String LastLoadedControl_TheBrazilianRegions 
    { 
     get 
     { 
      if (ViewState["LastLoadedControl_TheBrazilianRegions"] != null) 
      { 
       return ViewState["LastLoadedControl_TheBrazilianRegions"].ToString(); 
      } 
      else 
      { 
       return "~/UserControl/AboutBrazil/TheBrazilianRegions/ucIntroduction.ascx"; 
      } 
     } 
     set 
     { 
      ViewState["LastLoadedControl_TheBrazilianRegions"] = value; 
     } 
    } 

    private String LastClickedButton_TheBrazilianRegions 
    { 
     get 
     { 
      if (ViewState["LastClickedButton_TheBrazilianRegions"] != null) 
      { 
       return ViewState["LastClickedButton_TheBrazilianRegions"].ToString(); 
      } 
      else 
      { 
       return "Introduction"; 
      } 
     } 
     set 
     { 
      ViewState["LastClickedButton_TheBrazilianRegions"] = value; 
     } 
    } 

    private void LoadUserControl() 
    { 
     UserControl userControl = (UserControl)Page.LoadControl(LastLoadedControl_TheBrazilianRegions); 

     phTheBrazilianRegions.Controls.Clear(); 
     phTheBrazilianRegions.Controls.Add(userControl); 

     userControl.ID = "myUserControlNeasted"; 
    } 

    private void LoadClickedButton() 
    { 
     foreach (String control in this.listControl) 
     { 
      HtmlTableCell tdControl = (HtmlTableCell)this.FindControl("td" + control.Replace("-", "")); 

      if (control == this.LastClickedButton_TheBrazilianRegions) 
      { 
       tdControl.InnerHtml = "<div class=\"menuAtivoLeft\"></div><div class=\"menuAtivoCenter\"><div class=\"menuAtivoCenterContent\">" + this.LastClickedButton_TheBrazilianRegions + "</div></div><div class=\"menuAtivoRight\"></div>"; 
      } 
      else 
      { 
       try 
       { 
        Button btnButton = new Button(); 

        btnButton.ID = "btn" + control.Replace("-", ""); 
        btnButton.Text = control; 
        btnButton.CommandArgument = control; 
        btnButton.CssClass = "tableContentMenuContentButton"; 
        btnButton.Click += new EventHandler(this.btnLoadUserControl_Click); 

        AsyncPostBackTrigger _Trigger = new AsyncPostBackTrigger(); 

        _Trigger.ControlID = btnButton.ID; 
        _Trigger.EventName = "Click"; 

        tdControl.Controls.Clear(); 
        tdControl.Controls.Add(btnButton); 

        this.upTheBrazilianRegions.Triggers.Clear(); 
        this.upTheBrazilianRegions.Triggers.Add(_Trigger); 

        btnButton.Dispose(); 
       } 
       catch (Exception ex) 
       { 
        throw ex; 
       } 
      } 

      tdControl.Dispose(); 
     } 
    } 

    protected override void OnPreRender(EventArgs e) 
    { 
     this.LoadUserControl(); 
     this.LoadClickedButton(); 
     base.OnPreRender(e); 
    } 

    protected void Page_Load(object sender, EventArgs e) 
    { 
    } 

    protected void btnLoadUserControl_Click(object sender, EventArgs e) 
    { 
     Button btnSender = (Button)sender; 

     switch (btnSender.CommandArgument) 
     { 
      case "Introduction": 
       LastLoadedControl_TheBrazilianRegions = "~/UserControl/AboutBrazil/TheBrazilianRegions/ucIntroduction.ascx"; 
       break; 
      case "North": 
       LastLoadedControl_TheBrazilianRegions = "~/UserControl/AboutBrazil/TheBrazilianRegions/ucNorth.ascx"; 
       break; 
      case "Northeast": 
       LastLoadedControl_TheBrazilianRegions = "~/UserControl/AboutBrazil/TheBrazilianRegions/ucNortheast.ascx"; 
       break; 
      case "Middle-West": 
       LastLoadedControl_TheBrazilianRegions = "~/UserControl/AboutBrazil/TheBrazilianRegions/usMiddleWest.ascx"; 
       break; 
      case "South": 
       LastLoadedControl_TheBrazilianRegions = "~/UserControl/AboutBrazil/TheBrazilianRegions/ucSouth.ascx"; 
       break; 
      case "Southeast": 
       LastLoadedControl_TheBrazilianRegions = "~/UserControl/AboutBrazil/TheBrazilianRegions/ucSoutheast.ascx"; 
       break; 
      default: 
       LastLoadedControl_TheBrazilianRegions = "~/UserControl/AboutBrazil/TheBrazilianRegions/ucIntroduction.ascx"; 
       break; 
     } 

     LastClickedButton_TheBrazilianRegions = btnSender.CommandArgument; 

     this.LoadUserControl(); 
     this.LoadClickedButton(); 
    }

来源

2012-06-11 BetaSystems - Rodrigo Duarte

我解决去除该线路的问题：

AsyncPostBackTrigger _Trigger = new AsyncPostBackTrigger(); 

_Trigger.ControlID = btnButton.ID; 
_Trigger.EventName = "Click"; 

this.upTheBrazilianRegions.Triggers.Clear(); 
this.upTheBrazilianRegions.Triggers.Add(_Trigger);

来源

2013-09-19 15:06:13

在第二次回发后，按钮无法触发OnClick

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