winform —— 对话框和流及打印

对话框：  注意引用using System.IO;
showdialog();显示对话框，返回一个dialogresult的枚举类型

colorDialog：color属性，用来获取颜色
folderBrowserDialog:SelectedPath选中路径
fontDialog:font属性，返回一个font类型的值，里面存储了关于字体的设置
openFileDialog:
filename获取或设置文件路径包含文件名
filenames 是文件路径字符串数组
filter:文件筛选器 格式为 提示文本一|*.后缀|提示文本二|*.后缀|提示文本三|*.后缀
saveFileDialog1:
filename获取或设置文件路径包含文件名
filenames 是文件路径字符串数组
filter:文件筛选器 格式为 提示文本一|*.后缀|提示文本二|*.后缀|提示文本三|*.后缀

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 WindowsFormsApplication6
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        //颜色
        private void button1_Click(object sender, EventArgs e)
        {
            DialogResult dr = colorDialog1.ShowDialog();
            if (dr == DialogResult.OK)
            {
                this.BackColor = colorDialog1.Color;
            }
        }
        //文件夹浏览器
        private void button2_Click(object sender, EventArgs e)
        {
           DialogResult dr = folderBrowserDialog1.ShowDialog();
           if (dr == DialogResult.OK)
           {
               MessageBox.Show(folderBrowserDialog1.SelectedPath);
           }
           else
           {
               MessageBox.Show(folderBrowserDialog1.SelectedPath);
           }
        }
        //字体
        private void button3_Click(object sender, EventArgs e)
        {
            fontDialog1.ShowDialog();
            MessageBox.Show(fontDialog1.Font.Size.ToString());
        }
        //打开
        private string Files;
        private void button4_Click(object sender, EventArgs e)
        {
            DialogResult dr = openFileDialog1.ShowDialog();
            if (DialogResult.OK == dr)
            {
                string filename = openFileDialog1.FileName;
                StreamReader sr = new StreamReader(filename);
                textBox1.Text = sr.ReadToEnd();
                sr.Close();

                Files = filename;
            }
        }
        //保存
        private void button5_Click(object sender, EventArgs e)
        {
            if (Files == null)
            {
                saveFileDialog1.Filter = "文本 |*.txt|word|*.doc|excel|*.xls";
                DialogResult dr = saveFileDialog1.ShowDialog();
                if (dr == DialogResult.OK)
                {
                    string filename = saveFileDialog1.FileName;

                    StreamWriter sw = new StreamWriter(filename);
                    sw.Write(textBox1.Text);
                    sw.Close();
                }
            }
            else
            {
                StreamWriter sw = new StreamWriter(Files);
                sw.Write(textBox1.Text);
                sw.Close();
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }
        //关闭窗体
        private void button6_Click(object sender, EventArgs e)
        {
            this.Close();
        }
        //页面设置
        private void button7_Click(object sender, EventArgs e)
        {
            pageSetupDialog1.Document = printDocument1;
            pageSetupDialog1.ShowDialog();
        }
        //打印
        private void button8_Click(object sender, EventArgs e)
        {
            printDialog1.Document = printDocument1;
            DialogResult dr = printDialog1.ShowDialog();
            if (dr == DialogResult.OK)
            {
                printDocument1.Print();
            }
        }

        private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            System.Drawing.Font f = new System.Drawing.Font("宋体",12);
            e.Graphics.DrawString(textBox1.Text,f,System.Drawing.Brushes.Aqua,5,5);
        }
    }
}

流：
输入流：

string filename = openFileDialog1.FileName;
//通过读入流进行文件读取
StreamReader sr = new StreamReader(filename);
textBox1.Text = sr.ReadToEnd();
sr.Close();

输出流：

string filename = saveFileDialog1.FileName;
//写入流，可以在硬盘上创建文件，并为文件写入信息
StreamWriter sw = new StreamWriter(filename);
sw.Write(this.textBox1.Text);
sw.Close();
this:代表的它所在的那个类当前对象

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 FirstForm
{
    public partial class JiShiben : Form
    {
        public JiShiben()
        {
            InitializeComponent();
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            //MessageBox.Show("你好");
            if (this.textBox1.Text.Length > 0)
            { 
                撤销ToolStripMenuItem.Enabled = true;
            }
        }

        private void 复制ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.Copy();
        }

        private void 粘贴ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.Paste();
        }

        private void 剪切ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.Cut();
        }

        private void 撤销ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (textBox1.CanUndo == true)
            {
                // Undo the last operation.
                textBox1.Undo();
                // Clear the undo buffer to prevent last action from being redone.
                textBox1.ClearUndo();
            }
        }

        private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.SelectedText = "";
        }

        private void 全选ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            textBox1.SelectAll();
        }

        private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
        {
           DialogResult dr =  openFileDialog1.ShowDialog();
           if (dr == DialogResult.OK)
           {
               string filename = openFileDialog1.FileName;
               //通过读入流进行文件读取
               StreamReader sr = new StreamReader(filename);
               textBox1.Text = sr.ReadToEnd();
               sr.Close();
           }
        }

        private void 新建ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.textBox1.Text.Length > 0)
            {
               DialogResult drg= MessageBox.Show("是否进行保存?","保存对话框",MessageBoxButtons.YesNo);
               if (DialogResult.Yes == drg)
               {
                   if (FileName == null)
                   {
                       DialogResult dr = saveFileDialog1.ShowDialog();
                       if (dr == DialogResult.OK)
                       {
                           string filename = saveFileDialog1.FileName;
                           //写入流，可以在硬盘上创建文件，并为文件写入信息
                           StreamWriter sw = new StreamWriter(filename);
                           sw.Write(this.textBox1.Text);
                           sw.Close();
                       }
                   }
                   else
                   {
                       //写入流，可以在硬盘上创建文件，并为文件写入信息
                       StreamWriter sw = new StreamWriter(FileName);
                       sw.Write(this.textBox1.Text);
                       sw.Close();
                   }
               }
            }

            FileName = null;
            this.textBox1.Text = "";
        }
        private string FileName;
        private void 保存ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (FileName == null)
            {
                DialogResult dr = saveFileDialog1.ShowDialog();
                if (dr == DialogResult.OK)
                {
                    string filename = saveFileDialog1.FileName;
                    //写入流，可以在硬盘上创建文件，并为文件写入信息
                    StreamWriter sw = new StreamWriter(filename);
                    sw.Write(this.textBox1.Text);
                    sw.Close();
                }
            }
            else
            {
                //写入流，可以在硬盘上创建文件，并为文件写入信息
                StreamWriter sw = new StreamWriter(FileName);
                sw.Write(this.textBox1.Text);
                sw.Close();
            }
        }

        private void 另存为ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            saveFileDialog1.Filter = "文本文件(*.txt)|*.txt|word文件(*.doc)|*.doc";
            DialogResult dr = saveFileDialog1.ShowDialog();
            if (dr == DialogResult.OK)
            {
                string filename = saveFileDialog1.FileName;
                //写入流，可以在硬盘上创建文件，并为文件写入信息
                StreamWriter sw = new StreamWriter(filename);
                sw.Write(this.textBox1.Text);
                sw.Close();
            }
        }

        private void 页面设置ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            pageSetupDialog1.Document = printDocument1;//为页面设置对话框指定打印对象
            pageSetupDialog1.ShowDialog();//打开页面对话框
        }

        private void 打印ToolStripMenuItem_Click(object sender, EventArgs e)
        {
           DialogResult dr =  printDialog1.ShowDialog();
           if (dr == DialogResult.OK)
           {
               printDocument1.Print();
           }
        }

        private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            //设置打印的画板内容
            System.Drawing.Font f = new System.Drawing.Font("宋体", 12);
            e.Graphics.DrawString(this.textBox1.Text, f, SystemBrushes.ActiveBorder, 10.0f, 0f);
        }

        private void 查找ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            //Find ff = new Find(this.textBox1.SelectedText,this);
            //ff.Owner = this;
            //ff.Show();
        }

        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void JiShiben_Load(object sender, EventArgs e)
        {

        }
    }
}

打印：
打印对话框：printdialog
页面设置：pagesetupdialog
这两个对话框都需要通过设置printdocument来指定打印对象
printdocument：打印对象，必须要有，一块画板，用于打印机与打印内容之间中转，打印机打印的是printdoment
printDocument1_PrintPage:事件，每打印一页之前触发，用于给printdocument指定打印内容
通过画板把内容画到打印对象的页上：
System.Drawing.Font f = new System.Drawing.Font("宋体",12);
e.Graphics.DrawString(textBox1.Text,f,System.Drawing.Brushes.Aqua,5,5);
最后打印： 打印对话框那，如果打印对话框返回确定打印，就执行printdocument.print();