winform基础 C#编程

1.winform应用程序是一种智能客户端技术，帮助我们获得信息或者传输信息。

2.当后台需要获取前台控件属性，需要使用Name属性。

visible:指示一个空间是否可见

enabled:指示一个空间是否可用

3.事件：发生一件事情

注册事件：双击空间注册的都是控件默认控件被选中的那个事件。

触发事件：

4.在Main函数中创建的窗体对象，我们称之为这个窗体应用程序的主窗体

意味，当将主窗体关闭后，整个应用程序都关闭。

5.TextBox控件

WordWrap:指示文本框是否换行

PasswordChar：让文本框显示一个单一的字符

ScollBars：是否显示滚动条

时间：TextChanged 当文本框中的内容发生改变时触发这个事件

6,跑马灯

private void timer1_Tick(object sender, EventArgs e)
        {
            label1.Text = label1.Text.Substring(1) + label1.Text.Substring(0, 1);
        }

7.实时时间

 /// <summary>
        /// 每间隔一秒将当前的时间赋值给label2
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void timer2_Tick(object sender, EventArgs e)
        {
            label2.Text = DateTime.Now.ToString();
            //当时间在15:32分钟的时候叫我起床
            if(DateTime.Now.Hour==15&&DateTime.Now.Minute==32&&DateTime.Now.Second==32)
            {
                SoundPlayer sp = new SoundPlayer();
                sp.SoundLocation = @" ";
                sp.Play();
            }
        }
        /// <summary>
        /// 当窗体加载的时候 将当前系统时间赋值给Label2
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Form1_Load(object sender, EventArgs e)
        {
            label2.Text = DateTime.Now.ToString();
        }

8.简答记事本程序

1）在程序加载的时候，取消文本框的自动换行，以及让两个和文本框隐藏

2）点击登录，判断师傅登录成功

3）自动换行功能

4）保存文本到一个指定目录下

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

namespace WinFormsApp1
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            txtWords.WordWrap = false;
            btnWordWrap.Visible = false;
            btnSave.Visible = false;
            txtWords.Visible = false;
        }

        private void btnLogin_Click(object sender, EventArgs e)
        {
            string name = txtName.Text.Trim();
            string pwd = txtPwd.Text;
            if (name =="admin"&&pwd=="admin")
            {
                MessageBox.Show("欢迎进入记事本应用程序");
                btnWordWrap.Visible = true;
                btnSave.Visible = true;
                txtWords.Visible = true;

                label1.Visible = false;
                label2.Visible = false;
                txtName.Visible = false;
                txtPwd.Visible = false;
                btnLogin.Visible = false;
                //btnRest.Visible = false;
            }
            else
            {
                MessageBox.Show("用户名或者密码错误，请重新输入");
                txtName.Clear();
                txtPwd.Clear();
                //为空间设置焦点
                txtName.Focus();
            }
        }

        private void txtName_TextChanged(object sender, EventArgs e)
        {

        }

        /// <summary>
        /// 自动换行
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnWordWrap_Click(object sender, EventArgs e)
        {
           //当前是否是自动换行
           if(btnWordWrap.Text=="自动换行")
            {
                //取消自动换行
                txtWords.WordWrap = true;
                btnWordWrap.Text = "取消自动换行";
            }
           else if(btnWordWrap.Text=="取消自动换行")
            {
                txtWords.WordWrap = false;
                btnWordWrap.Text = "自动换行";
            }
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            using (FileStream fsWrite=new FileStream(@"",FileMode.OpenOrCreate,FileAccess.Write))
            {
                string str = txtWords.Text.Trim();
                byte[] buffer = System.Text.Encoding.Default.GetBytes(str);
                fsWrite.Write(buffer, 0, buffer.Length);
            }
            MessageBox.Show("保存成功");
        }
    }
}

9.单选和多选

checked:指示这个控件是否处于选中状态

默认情况下,在一个窗体中，所有的单选按钮只允许选中一个，可以使用groupbox进行分组。

10.窗体

1）首先确定一个父窗体，将IsMdiContainer设置为true。

2）创建子窗体，并且设置他们的父窗体

11.音乐播放

using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Media;
using System.Windows.Forms;
namespace Picture
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        //用来存储音乐文件的全路径
        List<string> listSongs = new List<string>();
        SoundPlayer sp = new SoundPlayer();
        private void Form1_Load(object sender, EventArgs e)
        {
            //播放音乐
            sp.SoundLocation = @"";
            sp.Play();
            pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
            pictureBox2.SizeMode = PictureBoxSizeMode.StretchImage;
            pictureBox3.SizeMode = PictureBoxSizeMode.StretchImage;
            pictureBox4.SizeMode = PictureBoxSizeMode.StretchImage;
            //pictureBox5.SizeMode = PictureBoxSizeMode.StretchImage;
            //pictureBox6.SizeMode = PictureBoxSizeMode.StretchImage;
            //在窗体加载的时候 给每一个PictureBox赋值一张图片路径
            pictureBox1.Image = Image.FromFile(@"");
            pictureBox2.Image = Image.FromFile(@"");
            pictureBox3.Image = Image.FromFile(@"");
            pictureBox4.Image = Image.FromFile(@"");
            //pictureBox5.Image = Image.FromFile(@"");
            //pictureBox6.Image = Image.FromFile(@"");
        }
        string[] path = System.IO.Directory.GetFiles(@"");
        int i = 0;
        Random r = new Random();
        /// <summary>
        /// 每间隔一秒切换一张图片
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void timer1_Tick(object sender, EventArgs e)
        {
            i++;
            if(i==path.Length)
            {
                i = 0;
            }
            pictureBox1.Image = Image.FromFile(path[r.Next(0, path.Length)]);
            pictureBox2.Image = Image.FromFile(path[r.Next(0, path.Length)]);
            pictureBox3.Image = Image.FromFile(path[r.Next(0, path.Length)]);
            pictureBox4.Image = Image.FromFile(path[r.Next(0, path.Length)]);
            //pictureBox5.Image = Image.FromFile(path[r.Next(0, path.Length)]);
            //pictureBox6.Image = Image.FromFile(path[r.Next(0, path.Length)]);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Title = "请选择音乐文件";
            ofd.InitialDirectory = @" ";
            ofd.Multiselect = true;
            ofd.Filter = "音乐文件|*.wav|所有文件|*.*";
            ofd.ShowDialog();
            //获得我们在文件夹中选择则所有文件的全路径
            string[] path = ofd.FileNames;
            for(int i=0;i<path.Length;i++)
            {
                //将音乐文件的文件名加载到listbox中
                listBox1.Items.Add(Path.GetFileName(path[i]));
                //将音乐文件的文件名加载到ListBox中
                listSongs.Add(path[i]);
            }
        }
        /// <summary>
        /// 双击播放音乐
        /// </summary>s
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void listBox1_DoubleClick(object sender, EventArgs e)
        {
            sp.SoundLocation = listSongs[listBox1.SelectedIndex];
            sp.Play();
        }

        /// <summary>
        /// 点击下一首
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            //获得当前选中歌曲的索引
            int index = listBox1.SelectedIndex;
            index++;
            if(index==listBox1.Items.Count)
            {
                index = 0;
            }
            //将改变后的索引重新的赋值给当前选中项的索引
            listBox1.SelectedIndex = index;
            sp.SoundLocation = listSongs[index];
            sp.Play();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            int index = listBox1.SelectedIndex;
            index--;
            if(index<0)
            {
                index = listBox1.Items.Count - 1;
            }
            //将重新改变后的索引重新赋值给当前选中项
            listBox1.SelectedIndex = index;
            sp.SoundLocation = listSongs[index];
            sp.Play();
        }
    }
}