Chapter 7. 对话框控件

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:UsersAdministratorDesktop";
            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:UsersAdministratorDesktop";

            //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;
        }
    }
}