Winform基础：关于Dialog的类 - 《C# 基础知识》

打开对话框：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
namespace _117_Dialog打开对话框
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            //点击弹出对话框
            OpenFileDialog ofd = new OpenFileDialog();
            //设置对话框标题
            ofd.Title = "选择你要打开的文件O(∩_∩)O";
            //设置对话框可以多选
            ofd.Multiselect = true;
            //设置对话框的初始目录
            ofd.InitialDirectory = @"C:\Users\46124\Desktop\.wav音乐";
            //设置对话框可筛选的文件类型的内容
            ofd.Filter = "媒体文件|*.wav|文本文件|*.txt|所有文件|*.*";
            //展示对话框
            ofd.ShowDialog();
            //获得在打开对话框中选中的路径
            string path = ofd.FileName;
            //如果路径为空，则立即跳出循环
            if (path=="")
            {
                return;
            }
            using (FileStream fsRead = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read))
            {
                byte[] buffer = new byte[1024 * 1024 * 5];
                //实际读取到的字节数
                int readbyte = fsRead.Read(buffer, 0, buffer.Length);
                textBox1.Text = Encoding.UTF8.GetString(buffer, 0, readbyte);
            }
        }
    }
}

打开和保存文件（目前只实现文本文件）

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
namespace _117_Dialog打开对话框
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            //点击弹出对话框
            OpenFileDialog ofd = new OpenFileDialog();
            //设置对话框标题
            ofd.Title = "选择你要打开的文件O(∩_∩)O";
            //设置对话框可以多选
            ofd.Multiselect = true;
            //设置对话框的初始目录
            ofd.InitialDirectory = @"C:\Users\46124\Desktop\.wav音乐";
            //设置对话框可筛选的文件类型的内容
            ofd.Filter = "文本文件|*.txt|媒体文件|*.wav|所有文件|*.*";
            //展示对话框
            ofd.ShowDialog();
            //获得在打开对话框中选中的路径
            string path = ofd.FileName;
            //如果路径为空，则立即跳出循环
            if (path == "")
            {
                return;
            }
            using (FileStream fsRead = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read))
            {
                byte[] buffer = new byte[1024 * 1024 * 5];
                //实际读取到的字节数
                int readbyte = fsRead.Read(buffer, 0, buffer.Length);
                textBox1.Text = Encoding.Default.GetString(buffer, 0, readbyte);
            }
            MessageBox.Show("打开成功");
        }
        private void btnSave_Click(object sender, EventArgs e)
        {
            SaveFileDialog sfd = new SaveFileDialog();
            sfd.Title = "请选择要保存的路径";
            sfd.InitialDirectory = @"C:\Users\46124\Desktop";
            sfd.Filter = "文本文件|*.txt|媒体文件|*.wav|所有文件|*.*";
            //获取保存文件的路径
            sfd.ShowDialog();
            string path = sfd.FileName;
            if (path=="")
            {
                return;
            }
            using (FileStream fsWrite = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write))
            {
                byte[] buffer=Encoding.Default.GetBytes(textBox1.Text);
                fsWrite.Write(buffer, 0, buffer.Length);
            }
            MessageBox.Show("保存成功");
        }
    }
}

添加了前景背景色，字体

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
namespace _117_Dialog打开对话框
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        /// <summary>
        /// 打开对话框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            //点击弹出对话框
            OpenFileDialog ofd = new OpenFileDialog();
            //设置对话框标题
            ofd.Title = "选择你要打开的文件O(∩_∩)O";
            //设置对话框可以多选
            ofd.Multiselect = true;
            //设置对话框的初始目录
            ofd.InitialDirectory = @"C:\Users\46124\Desktop\.wav音乐";
            //设置对话框可筛选的文件类型的内容
            ofd.Filter = "文本文件|*.txt|媒体文件|*.wav|所有文件|*.*";
            //展示对话框
            ofd.ShowDialog();
            //获得在打开对话框中选中的路径
            string path = ofd.FileName;
            //如果路径为空，则立即跳出循环
            if (path == "")
            {
                return;
            }
            using (FileStream fsRead = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read))
            {
                byte[] buffer = new byte[1024 * 1024 * 5];
                //实际读取到的字节数
                int readbyte = fsRead.Read(buffer, 0, buffer.Length);
                textBox1.Text = Encoding.Default.GetString(buffer, 0, readbyte);
            }
            MessageBox.Show("打开成功");
        }
        /// <summary>
        /// 保存对话框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnSave_Click(object sender, EventArgs e)
        {
            SaveFileDialog sfd = new SaveFileDialog();
            sfd.Title = "请选择要保存的路径";
            sfd.InitialDirectory = @"C:\Users\46124\Desktop";
            sfd.Filter = "文本文件|*.txt|媒体文件|*.wav|所有文件|*.*";
            //获取保存文件的路径
            sfd.ShowDialog();
            string path = sfd.FileName; 
            if (path=="")
            {
                return;
            }
            using (FileStream fsWrite = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write))
            {
                byte[] buffer=Encoding.Default.GetBytes(textBox1.Text);
                fsWrite.Write(buffer, 0, buffer.Length);
            }
            MessageBox.Show("保存成功");
        }
        /// <summary>
        /// 字体对话框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click_1(object sender, EventArgs e)
        {
            FontDialog fd = new FontDialog();
            fd.ShowDialog();
            textBox1.Font = fd.Font;
            //textBox1.ForeColor = fd.Color;
        }
        /// <summary>
        /// 前景色颜色对话框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            ColorDialog cd = new ColorDialog();
            cd.ShowDialog();
            textBox1.ForeColor = cd.Color;
        }
        /// <summary>
        /// 背景色颜色对话框
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            ColorDialog cd = new ColorDialog();
            cd.ShowDialog();
            textBox1.BackColor = cd.Color;
        }
    }
}