C#之数据类型学习

C#有以下几种数据类型：

数据类型案例以及取值范围：

界面：

选择int时：

选中long时：

选中float时：

选中double时：

选中decimal时：

选中string时：

选中char时：

选中Bool时：

源代码如下：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace SecondWpf
{
     /// <summary>
     /// MainWindow.xaml 的交互逻辑
     /// </summary>
     public partial class MainWindow : Window
     {
         public MainWindow()
         {
             InitializeComponent();
         }

private void ListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
         {
         
         }

private void Button_Click(object sender, RoutedEventArgs e)
         {
             Close();//当Quit键被按下以后，退出系统
         }

private void ListBoxItem_Selected(object sender, RoutedEventArgs e)
         {
             int variable,IntMax,IntMin;
             variable = 42;
             IntMax = (int)Math.Pow(2, 32)-1;
             IntMin = (int)Math.Pow(-2, 32);
             Value.Text = variable.ToString() ;
             Down.Text = IntMin.ToString();
             Uper.Text = IntMax.ToString();
         }

private void List1_Selected(object sender, RoutedEventArgs e)
         {
             long LongMax, LongMin,variable;
             variable = 42L;
     
             LongMax = (long)Math.Pow(2, 63) - 1;
             LongMin = (long)Math.Pow(-2, 63);
             Value.Text = variable.ToString();
             Down.Text = LongMax.ToString();
             Uper.Text = LongMin.ToString();
         }

private void List2_Selected(object sender, RoutedEventArgs e)
         {
             float variable;
             string FloatMax, FloatMin;
             variable = 0.42f;
             FloatMax = "(+-)1.5*10^45";
             FloatMin = "(+-)3.4 * 10 ^ 45";
             Value.Text = variable.ToString();
             Down.Text = FloatMax;
             Uper.Text = FloatMin;
         }

private void List3_Selected(object sender, RoutedEventArgs e)
         {
             double variable;
             string DoubleMax;
             string DoubleMin;
             variable = 0.43;
             DoubleMax = "+-5.0*10^-324";
             DoubleMin = "+-1.7*10^308";
             Value.Text = variable.ToString();
             Down.Text = DoubleMax;
             Uper.Text = DoubleMin;

}

private void List4_Selected(object sender, RoutedEventArgs e)
         {
             decimal coin;
             string DecimalMax, DecimalMin;
             coin = 0.42M;
             DecimalMax ="+-1.0*10^-28";
             DecimalMin = "+-7.9*10^28";
             Value.Text = coin.ToString();
             Down.Text = DecimalMax.ToString();
             Uper.Text = DecimalMin.ToString();
         }

private void List5_Selected(object sender, RoutedEventArgs e)
         {
             string vest;
             vest = "你好！";
             Value.Text = vest;
             Down.Text = "null";
             Uper.Text = "null";
         }

private void List6_Selected(object sender, RoutedEventArgs e)
         {
             char grill;
             int CharMax, CharMin;
             grill = 'x';
             CharMax = (int)Math.Pow(2, 16) - 1;
             CharMin = 0;
             Value.Text = grill.ToString();
             Down.Text = CharMin.ToString();
             Uper.Text = CharMax.ToString();
         }

private void List7_Selected(object sender, RoutedEventArgs e)
         {
             bool teeth;
             teeth = false;
             Value.Text = teeth.ToString();
             Down.Text ="Ture";
             Uper.Text = "Flase";
         }
     }
}