[C#]随便记记

匿名数据类型

namespace DEMO
{
    class Program
    {
        static void Main(string[] args)
        {
            int intValue0 = 1;
            Console.WriteLine(intValue0.GetType());
            var Value1 = 2;
            Console.WriteLine(Value1.GetType());
            var Value2 = 3.14f;
            Console.WriteLine(Value2.GetType());
            var Value3 = "demo";
            Console.WriteLine(Value3.GetType());
            Value1 = 1.0;   //CS0266
        }
    }
}

 异常处理

using System;

namespace ConsoleApp
{
    class TestClass
    {
        static void Main(string[] args)
        {
            try
            {
                Console.WriteLine("Try");
            }
            catch (FormatException e)
            {
                Console.WriteLine("Catch");
            }
            finally
            {
                Console.WriteLine("Finally");
            }
            Console.ReadKey();
        }
    }
}

根据MessageBox不同按钮的点击触发不同的事件

 

using System;
using System.Windows.Forms;

namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            DialogResult theDlgResult = MessageBox.Show("提示", "标题", MessageBoxButtons.OKCancel, MessageBoxIcon.Information);
            if (theDlgResult == DialogResult.OK)
            {
                MessageBox.Show("点击了\"确定\"");
            }
            else
            {
                MessageBox.Show("点击了\"取消\"");
            }

        }

        private void button2_Click(object sender, EventArgs e)
        {
            DialogResult theDlgResult = MessageBox.Show("提示", "标题", MessageBoxButtons.YesNo, MessageBoxIcon.Information);
            if (theDlgResult == DialogResult.Yes)
            {
                MessageBox.Show("点击了\"是\"");
            }
            else
            {
                MessageBox.Show("点击了\"否\"");
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            DialogResult theDlgResult = MessageBox.Show("提示", "标题", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Information);
            if (theDlgResult == DialogResult.Yes)
            {
                MessageBox.Show("点击了\"是\"");
            }
            else if (theDlgResult == DialogResult.No)
            {
                MessageBox.Show("点击了\"否\"");
            }
            else
            {
                MessageBox.Show("点击了\"取消\"");
            }
        }
    }
}