using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;namespace 对话框控件
{public partial class Form2 : Form{public Form2(){InitializeComponent();}private void button1_Click(object sender, EventArgs e){SaveFileDialog sfd = new SaveFileDialog();sfd.Title = "请选择要保存的路径";sfd.InitialDirectory = @"C:\Users\Administrator\Desktop";sfd.Filter = "文本文件|*.txt|所有文件|*.*";sfd.ShowDialog();//获得保存文件的路径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");}}
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;namespace 对话框控件
{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();//设置对话框的标题ofd.Title = "请选择要打开的文本文件";//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\Administrator\Desktop";//设置打开文件的类型ofd.Filter = "文本文件|*.txt |图片文件|*.jpg |所有文件|*.*";//展示对话框
            ofd.ShowDialog();//获得在打开对话框中选中文件的路径string path = ofd.FileName;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 r = fsRead.Read(buffer,0,buffer.Length);textBox1.Text = Encoding.Default.GetString(buffer,0,r);}}}
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;namespace 对话框控件
{public partial class Form3 : Form{public Form3(){InitializeComponent();}/// <summary>/// 字体对话框/// </summary>/// <param name="sender"></param>/// <param name="e"></param>private void button1_Click(object sender, EventArgs e){FontDialog fd = new FontDialog();fd.ShowDialog();textBox1.Font = fd.Font;}/// <summary>/// 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;}}
}