ASP.NET可见= true并不显示按钮

通过将我的按钮设置为可见，我遇到了问题。我在MasterPage中创建了一些按钮，并将其可见性设置为false。（button.Visible = false;）按下按钮后，我被重定向到另一个页面。在这个页面上（一个来自MasterPage的孩子）我想设置一些可见的按钮（Master.FindControl（“button”）。Visible = true），但这是我的问题。它没有出现。ASP.NET可见= true并不显示按钮

MasterPage.master：

 <asp:Button ID="b_home" runat="server" Text="Home" CssClass="button" OnClick="b_home_Click"/> 
     <asp:Button ID="b_profil" runat="server" Text="Profil" CssClass="button" OnClick="b_profil_Click"/> 
     <asp:Button ID="b_reservieren" runat="server" Text="Reservieren" CssClass="button" OnClick="b_reservieren_Click"/> 
     <asp:Button ID="b_verleihhistorie" runat="server" Text="Verleihhistorie" CssClass="button" OnClick="b_verleihhistorie_Click"/> 
     <asp:Button ID="b_warenausgang" runat="server" Text="Warenausgang" CssClass="button" OnClick="b_warenausgang_Click"/> 
     <asp:Button ID="b_wareneingang" runat="server" Text="Wareneingang" CssClass="button" OnClick="b_wareneingang_Click"/> 
     <asp:Button ID="b_neueKunden" runat="server" Text="Neue Kunden" CssClass="button" OnClick="b_neueKunden_Click"/> 
     <asp:Button ID="b_kontakte" runat="server" Text="Kontakte" CssClass="button" OnClick="b_kontakte_Click"/> 
    </div>

Master.master.cs

protected void Page_Load(object sender, EventArgs e) 
{ 
    b_home.Visible = true; 
    b_kontakte.Visible = true; 
    b_profil.Visible = false; 
    b_reservieren.Visible = false; 
    b_verleihhistorie.Visible = false; 
    b_warenausgang.Visible = false; 
    b_wareneingang.Visible = false; 
    b_neueKunden.Visible = false; 

}

Default.aspx.cs

protected void Page_Load(object sender, EventArgs e) 
{ 


    if(MasterPage.istAngemeldet) 
    { 

     // .p = db.Persons.Where(s => s.Email==benutzername && s.Passwort== passwort).FirstOrDefault(); 


     l_willkommen.Text= "Herzlich Willkommen bei Bee-Coop.at, " + MasterPage.p.Vorname + "!"; 
     LinkButton l1 = (LinkButton)Master.FindControl("LinkButton1"); 
     l1.Text = "[Abmelden]"; 

     #region SideMenu_Control 

     switch(MasterPage.hatRolle) 
     { 
      case 0: Master.FindControl("b_home").Visible = true; 
        Master.FindControl("b_kontakte").Visible = true; 
        Master.FindControl("b_profil").Visible = true; 
        Master.FindControl("b_reservieren").Visible = true; 
        Master.FindControl("b_verleihhistorie").Visible = true; 
        Master.FindControl("b_warenausgang").Visible = true; 
        Master.FindControl("b_wareneingang").Visible = true; 
        Master.FindControl("b_neueKunden").Visible = true; 
        break; 

      case 1: Master.FindControl("b_home").Visible = true; 
        Master.FindControl("b_kontakte").Visible = true; 
        Master.FindControl("b_profil").Visible = true; 
        Master.FindControl("b_reservieren").Visible = true; 
        Master.FindControl("b_verleihhistorie").Visible = true; 
        Master.FindControl("b_warenausgang").Visible = true; 
        Master.FindControl("b_wareneingang").Visible = true; 
        break; 

      case 2: Master.FindControl("b_home").Visible = true; 
        Master.FindControl("b_kontakte").Visible = true; 
        Master.FindControl("b_profil").Visible = true; 
        Master.FindControl("b_reservieren").Visible = true; 
        Master.FindControl("b_verleihhistorie").Visible = true; 
        break; 

      case 3: Master.FindControl("b_home").Visible = true; 
        Master.FindControl("b_kontakte").Visible = true; 
        break;     
     } 

     #endregion 
    } 
}

来源

2014-10-31 SadMexBanco

的[面板可见=真没有效果]可能重复（http://stackoverflow.com/questions/2539204/ panel-visible-true-no-effect） – 2014-10-31 12:24:39

主页面的Page_Load事件在页面的Page_Load事件之后执行，这就是为什么会发生这种情况。 – 2014-10-31 14:38:42

你每次一开始Page_Load事件页面显示，所以你的控件的可见性设置为false，你需要我们的代码更改为：

protected void Page_Load(object sender, EventArgs e) 
{ 
      switch(MasterPage.hatRolle) 
    { 
     case 0: b_home.Visible = true; 
       b_kontakte.Visible = true; 
       b_profil.Visible = true; 
       b_reservieren.Visible = true; 
       b_verleihhistorie.Visible = true; 
       b_warenausgang.Visible = true; 
       b_wareneingang.Visible = true; 
       b_neueKunden.Visible = true; 
       break; 

     //case 1: ..... 
     //........... 
    } 
}

来源

2014-10-31 12:25:29 0699

protected void Page_Load(object sender, EventArgs e) 
{ 
    if (!Page.IsPostBack) 
    { 
     b_home.Visible = true; 
     b_kontakte.Visible = true; 
     b_profil.Visible = false; 
     b_reservieren.Visible = false; 
     b_verleihhistorie.Visible = false; 
     b_warenausgang.Visible = false; 
     b_wareneingang.Visible = false; 
     b_neueKunden.Visible = false; 
    } 
}

来源

2014-10-31 12:26:05

ASP.NET可见= true并不显示按钮

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