网格的动态组合问题-解网

问：

我在 c # 中有一个异步函数，它向我返回一个 scrollView，其中在其中创建了一个由两个静态列组成的 Grid，并在 For 中动态创建了 Row。如果在 For 中，我一次只创建一行，那么结果是正确的，但如果在其中我尝试一次创建两行，则网格以错误的方式组成，没有任何逻辑意义。

代码中的第一行在第 0 列中填充了 Label，在第 1 列中填充了 Button，并且 with 和行由变量 “p” 分配，该变量在 For 的末尾递增。相反，在第二行中，我想插入一个简单的标签，没有黑色背景的文本此行也由变量“p + 1”动态分配。

就好像它完全忽略了我想分配给第二行的内容，将其分配给循环期间创建的最后一行，第二个屏幕澄清了这一点

我正在附加简化代码

 public async Task<Xamarin.Forms.ScrollView> GridComposionAsync()
    {
        Xamarin.Forms.ScrollView scrollView = new Xamarin.Forms.ScrollView();
        scrollView.Orientation = ScrollOrientation.Vertical;

        Grid grid = new Grid();
        
        grid.VerticalOptions = LayoutOptions.FillAndExpand;
        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(0.7 , GridUnitType.Star)  });
        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(0.3, GridUnitType.Star) }); 
         

         int p = 0;
         int ts = Tempo / 10;

         for (int i = 0; i < 144; i += 0)
         {
             bool st = false;

  // in this part of the code checks are carried out for which the variable st can be true or false
                     
                 if (st == true)
                 {

                    // create first Row 

                   Label label = new Label
                   {
                         Text = $"è la riga n :{x.arrPre[i].Orario}" + "stato : " + st,
                         BackgroundColor = Color.Blue
                     };

                   Button button = new Button
                     {
                         Text = $"Button:{p}",
                         BackgroundColor = Color.Red,
                       
                     };
                   button.Clicked += Button_Clicked;
                
              
                   grid.RowDefinitions.Add(new RowDefinition { Height = 100 });
                   grid.Children.Add(label, 0, p);
                   grid.Children.Add(button, 1, p);

                  // create Second Row

                   grid.RowDefinitions.Add(new RowDefinition { Height = 10 });
                   Label label2row = new Label { BackgroundColor = Color.Black };
                   grid.Children.Add(label2row, 0, p + 1);

                   p++;
                   i += ts;
                 }
                 else
                 {                      
                     i++;
                 }
             }
         }));
        scrollView.Content = grid;
        return scrollView;  
    }

这是我的结果的屏幕==>https://i.stack.imgur.com/34teL.png

第二屏幕 ==> https://i.stack.imgur.com/E4zvG.png

C# Xamarin.Forms 网格

public async Task<Xamarin.Forms.ScrollView> GridComposionAsync()
    {
        Xamarin.Forms.ScrollView scrollView = new Xamarin.Forms.ScrollView();
        scrollView.Orientation = ScrollOrientation.Vertical;

        Grid grid = new Grid();

        grid.VerticalOptions = LayoutOptions.FillAndExpand;
        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(0.7, GridUnitType.Star) });
        grid.ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(0.3, GridUnitType.Star) });


        int p = 0;

        for (int i = 0; i < 10; i ++ )
        {
            bool st = true;

            // in this part of the code checks are carried out for which the variable st can be true or false

            if (st == true)
            {

                // create first Row 

                Label label = new Label
                {
                    Text = $"è la riga n : {i}" + "stato : " + st,
                    BackgroundColor = Color.Blue
                };

                Button button = new Button
                {
                    Text = $"Button:{i}",
                    BackgroundColor = Color.Red,

                };
                button.Clicked += Button_Clicked;


                grid.RowDefinitions.Add(new RowDefinition { Height = 100 });
                grid.Children.Add(label, 0, p);
                grid.Children.Add(button, 1, p);

            

                grid.RowDefinitions.Add(new RowDefinition { Height = 10 });
                Label label2row = new Label { BackgroundColor = Color.Black };
                grid.Children.Add(label2row, 0, p+1);
                p+=2;
            }
            else
            {
                i++;
            }
        }
        scrollView.Content = grid;
        return scrollView;
    }

网格的动态组合问题

problem with the dynamic composition of a grid

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