C# winform控件使用例程

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.IO; namespace WindowsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { OpenFileDialog openFiledDialog=new OpenFileDialog(); openFiledDialog.InitialDirectory = "D:\\"; openFiledDialog.Filter = "文本文件|*.*|C#文件|*.cs|所有文件|*.*"; openFiledDialog.FilterIndex= 1; if (openFiledDialog.ShowDialog() == DialogResult.OK) { //打开文件对话框中选择的文件名 string fname = openFiledDialog.FileName; //创建从字符串进行读取的StringReader对象 StreamReader sr = File.OpenText(fname); string str; while((str=sr.ReadLine())!=null) { //将读出的字符串在richTextBox1中显示; this.richTextBox1.Text+=str; } private void button2_Click(object sender, EventArgs e) { SaveFileDialog saveFileDialog=new SaveFileDialog(); saveFileDialog.Filter = "文本文件|*.*|C#文件|*.cs|所有文件|*.*"; saveFileDialog.FilterIndex = 2; saveFileDialog.RestoreDirectory = true; if (saveFileDialog.ShowDialog() == DialogResult.OK) { string fName = saveFileDialog.FileName; //向指定路径（fName）的文件中追加内容； StreamWriter sw = File.AppendText(fName); //将richTextBox1控件中的内容写入到指定文件中； sw.Write(this.richTextBox1.Text); sw.Write("添加到文件中的内容：添加的内容信息！"); sw.Flush(); sw.Close(); } private void button3_Click(object sender, EventArgs e) { FontDialog fontDialog = new FontDialog(); fontDialog.Color = richTextBox1.ForeColor; //指示用户能否更改＂脚本＂组合框中的字符集 fontDialog.AllowScriptChange = true; //该值指示对话框是否显示颜色选择； fontDialog.ShowColor = true; if (fontDialog.ShowDialog() != DialogResult.Cancel) { richTextBox1.SelectionFont = fontDialog.Font; } private void button4_Click(object sender, EventArgs e) { ColorDialog colorDialog = new ColorDialog(); colorDialog.AllowFullOpen = true; colorDialog.FullOpen = true; colorDialog.ShowHelp = true; colorDialog.Color = Color.Black; //初始化当然前文本框中的颜色 colorDialog.ShowDialog(); richTextBox1.SelectionColor = colorDialog.Color; } private void button5_Click(object sender, EventArgs e) { PageSetupDialog pageSetupDialog = new PageSetupDialog(); pageSetupDialog.Document =printDocument1 ; pageSetupDialog.ShowDialog(); } } } } }