c# 代碼整理集 3

7 簡單數據綁定

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace Bindings
...{
    public partial class Form1 : Form
    ...{
        data d1;
        public Form1()
        ...{
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        ...{
            d1=new data ();
            this.label1.DataBindings.Add("Text", d1, "Text");
            this.textBox1.DataBindings.Add("Text", d1, "Text");
        }

        private void button1_Click(object sender, EventArgs e)
        ...{
            d1.Text = "this is a test!";
        }
    }

    public class data
    ...{
        private string text;

        public string Text
        ...{
            get
            ...{
                return this.text;
            }
            set
            ...{
                this.text = value;
            }
        }

        public data()
        ...{
            this.text = "";
        }
    }
}

8 float 轉 int 時,會不會四捨五入?
        static void Main(string[] args)
        {
            float f = -123.567F;
            int i = (int)f;
             //i =-123
        }
9 ToString 參數影響的結果。

        static void Main(string[] args)
        ...{

            double a;
            a = 1222.05;
            Console.Write(a.ToString("# "));                       //1222
            Console.Write(a.ToString("## "));                      //1222
            Console.Write(a.ToString("##.# "));                    //1222.1
            Console.Write(a.ToString("##.## "));                   //1222.05
            Console.Write(a.ToString("####.### "));                //1222.05    
            Console.Write(a.ToString("####.###### "));             //1222.05    
            Console.Write(a.ToString("#############.######## "));  //1222.05
            Console.Write(a.ToString("##.0 "));                    //1222.1
            Console.Write(a.ToString("(##)##.0 "));                //(12)22.1    
            string s=Console.ReadLine();


        }