在Visual Studio 2012中缺少按鈕

Question

當我在Visual Studio 2012中，並在asp.net頁面上工作時，我的設計和拆分按鈕丟失。我只有源。我怎樣才能讓這些回來。

Answer 1

看看窗口的底部。在這個問題 請看： Where has Design View gone in Visual Studio 2012?

如果它們不存在，使他們： Visual Studio 2012 - where has ASPX design and split view gone?

Answer 2

<TabControl TabStripPlacement="Top"> 
     <TabItem Header="Ex1" Width="100"> 
      <Grid> 
       <Grid.ColumnDefinitions> 
        <ColumnDefinition Width="129*"/> 
        <ColumnDefinition Width="23*"/> 
        <ColumnDefinition Width="355*"/> 
       </Grid.ColumnDefinitions> 
       <Button Content="Get Data" HorizontalAlignment="Left" Margin="61,22,0,0" VerticalAlignment="Top" Width="75" Click="Button_Click" Grid.Column="2"/> 
       <ListBox Name="lbxDisplay" HorizontalAlignment="Left" Height="195" Margin="24,59,0,0" VerticalAlignment="Top" Width="456" Grid.ColumnSpan="3"/> 
      </Grid> 
     </TabItem> 
     <TabItem Header="Ex2" Width="100"> 
      <Grid> 
       <Grid.ColumnDefinitions> 
        <ColumnDefinition Width="22*"/> 
        <ColumnDefinition Width="20*"/> 
        <ColumnDefinition Width="465*"/> 
       </Grid.ColumnDefinitions> 
       <Button Content="GetData2" Name="GetData2" HorizontalAlignment="Left" Margin="171,22,0,0" VerticalAlignment="Top" Width="75" Click="GetData2_Click" Grid.Column="2"/> 
       <ListBox Name="lbx1" HorizontalAlignment="Left" Height="195" Margin="2,59,0,0" VerticalAlignment="Top" Width="209" Grid.Column="1" Grid.ColumnSpan="2" SelectionChanged="lbx1_SelectionChanged" /> 
       <ListBox Name="lbx2" HorizontalAlignment="Left" Height="195" Margin="233,59,0,0" VerticalAlignment="Top" Width="207" Grid.Column="2"/> 
      </Grid> 
     </TabItem> 
     <TabItem Header="Ex3" Width="100"> 
      <Grid Margin="9,14,16,28"> 
       <Button Content="Get Data3" Name="GetData3" HorizontalAlignment="Left" Margin="213,22,0,0" VerticalAlignment="Top" Width="75" Click="GetData3_Click"/> 
       <DataGrid Name="dgDisplay3" Margin="0,51,0,0" RenderTransformOrigin="0.5,0.5" > 
        <DataGrid.RenderTransform> 
         <TransformGroup> 
          <ScaleTransform/> 
          <SkewTransform AngleX="1.193"/> 
          <RotateTransform/> 
          <TranslateTransform X="-1.479"/> 
         </TransformGroup> 
        </DataGrid.RenderTransform> 
       </DataGrid> 
      </Grid> 
     </TabItem> 
     <TabItem Header="Ex4" Width="100"> 
      <Grid> 
       <Button Content="Get Data" Name="GetData4" HorizontalAlignment="Left" Margin="213,22,0,0" VerticalAlignment="Top" Width="75" Click="GetData4_Click"/> 
       <DataGrid Name ="dgDisplay4" Margin="10,62,10,10"></DataGrid> 
      </Grid> 
     </TabItem> 
     <TabItem Header="Ex5" Width="100"> 
      <Grid> 
       <Button Content="Get Data" Name="GetData5" HorizontalAlignment="Left" Margin="213,22,0,0" VerticalAlignment="Top" Width="75" Click="GetData5_Click"/> 
       <DataGrid Name ="dgDisplay5" Margin="10,62,10,10"></DataGrid> 
      </Grid> 
     </TabItem> 
    </TabControl> 




    //1. Retrieve customer names and display alphabetically in a listbox 
     private void Button_Click(object sender, RoutedEventArgs e) 
     { 
      DataClasses1DataContext db = new DataClasses1DataContext(); 

      var query = from c in db.Customers 
         orderby c.ContactName ascending 
         select c.ContactName; 

      lbxDisplay.ItemsSource = query.ToList(); 
     } 


     //2.(a) One on left displays supplier name. 
     private void GetData2_Click(object sender, RoutedEventArgs e) 
     { 
      DataClasses1DataContext db = new DataClasses1DataContext(); 

      var query = from s in db.Suppliers 
         select s.CompanyName; 

      lbx1.ItemsSource = query.ToList(); 
      lbx1.SelectedIndex = 0; 
     } 
     //(b) When a name is selected on this list the products for this supplier are displayed on the right 
     private void lbx1_SelectionChanged(object sender, SelectionChangedEventArgs e) 
     { 
      DataClasses1DataContext db = new DataClasses1DataContext(); 

      string companyName = lbx1.SelectedValue.ToString(); 
      var query2 = from s in db.Suppliers 
         join p in db.Products 
         on s.SupplierID equals p.SupplierID 
         where s.CompanyName == companyName 
         select p.ProductName; 

      lbx2.ItemsSource = query2.ToList(); 
     } 


     //3. Select the following product information and display on a DataGrid 
     //Product Name //Supplier Name //Unit Price 
     private void GetData3_Click(object sender, RoutedEventArgs e) 
     { 
      DataClasses1DataContext db = new DataClasses1DataContext(); 

      var query3 = from s in db.Suppliers 
         join p in db.Products 
         on s.SupplierID equals p.SupplierID 
         select new 
         { 
          Name = s.CompanyName, 
          Product = p.ProductName, 
          Price = p.UnitPrice 
         }; 

      dgDisplay3.ItemsSource = query3.ToList(); 
     } 


     //4. Display Customer ID and Number of Orders sorted with highest number of orders first 
     //using Orderby 
     private void GetData4_Click(object sender, RoutedEventArgs e) 
     { 
      DataClasses1DataContext db = new DataClasses1DataContext(); 

      var query4 = from o in db.Orders 
         join od in db.Order_Details 
         on o.OrderID equals od.OrderID 
         orderby od.Quantity descending 

         select new 
          { 
          CustomerId = o.CustomerID, 
          NumberofOrders = od.Quantity, 
          }; 

      dgDisplay4.ItemsSource = query4.ToList(); 
     } 


     //5. Display the following information from the Orders and Customer tables ordered by count of orders 
     // Customer ID // Company Name // Number of Orders // Contact Name // Contact Phone 
     //Hint: Use Group and Join 
     private void GetData5_Click(object sender, RoutedEventArgs e) 
     { 
      DataClasses1DataContext db = new DataClasses1DataContext(); 

      var query5 = from o in db.Orders 
         group o by o.CustomerID into g 
         join c in db.Customers on g.Key equals c.CustomerID 
         orderby g.Count() descending 

         select new 
         { 
          CustomerId = g.Key, 
          CompanyName = c.CompanyName, 
          OrderCount = g.Count(), 
          ContactName = c.ContactName, 
          ContactPhone = c.Phone 
         }; 
      dgDisplay5.ItemsSource = query5; 
     } 


    }//end class