C#语言简介

  c#语言功能强大且可以实现对象之间的转换，轻松实现各种对象转换成字符串（ToString()）

 

语言的简洁：

下面介绍下 is  关键字可以实现对象类型的判断

 

下面是Window1.xaml 文件代码

 <Window x:Class="NET_1._3._2_Wpf.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="344" Width="662"> <Grid> <TextBox Height="23" Margin="46,35,200,0" Name="ToFileTextBox" VerticalAlignment="Top" /> <Button Height="23" HorizontalAlignment="Right" Margin="0,35,55,0" Name="WriteToFileButton" VerticalAlignment="Top" Width="117" Click="WriteToFileButton_Click">向文件写入文本流</Button> <TextBox Margin="46,0,0,125" Name="NetTextBox" HorizontalAlignment="Left" Width="388" Height="23" VerticalAlignment="Bottom" /> <Button HorizontalAlignment="Right" Margin="0,0,52,125" Name="ToNetButton" Width="117" Click="ToNetButton_Click" Height="23" VerticalAlignment="Bottom">向网络写入数据流</Button> <TextBox Height="23" Margin="46,97,200,0" Name="ReadFileTextBox" VerticalAlignment="Top" /> <Button Height="23" HorizontalAlignment="Right" Margin="0,97,55,0" Name="ReadFileButton" VerticalAlignment="Top" Width="117" Click="ReadFileButton_Click">从文件读出文本流</Button> </Grid> </Window>

 

 

下面是Window1.xaml.cs代码

 <Window x:Class="NET_Wpf_1._1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300"> <Grid> <Button Height="39" Margin="87,0,82,77" Name="button1" VerticalAlignment="Bottom" Click="button1_Click">Button</Button> <TextBox Height="35" Margin="48,73,48,0" Name="textBox1" VerticalAlignment="Top" /> </Grid> </Window>

 

 

数据流

网络流 文本流 文件流

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; namespace NET_Wpf_1._1 { /// <summary> /// Window1.xaml 的交互逻辑 /// </summary> public partial class Window1 : Window { public Window1() { InitializeComponent(); } private void button1_Click(object sender, RoutedEventArgs e) { int i = 100; object obj = i; if(obj is int) { textBox1.Text = "对象是一个整数！"; } else { textBox1.Text = "对象不是是一个整数！"; } } } }

 

 using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using System.IO; using System.Net; using System.Net.Sockets; namespace NET_1._3._2_Wpf { /// <summary> /// Window1.xaml 的交互逻辑 /// </summary> public partial class Window1 : Window { public Window1() { InitializeComponent(); } private void WriteToFileButton_Click(object sender, RoutedEventArgs e) { string strText = ToFileTextBox.Text.ToString().Trim(); if (strText.Equals("")) { MessageBox.Show("写入字符不能为空！"); } else { StreamWriter sw = new StreamWriter("D://Temp//aa.txt", true, System.Text.Encoding.UTF8); sw.Write(strText); sw.Close(); MessageBox.Show("写入成功！"); } } private void ToNetButton_Click(object sender, RoutedEventArgs e) { Socket mySocket = null; } private void ReadFileButton_Click(object sender, RoutedEventArgs e) { StreamReader sr = new StreamReader("D://Temp//aa.txt", System.Text.Encoding.UTF8); ReadFileTextBox.Text = sr.ReadToEnd(); sr.Close(); } } }

 

 

用户参数

params关键字

 

<Window x:Class="CSharp_Net_Wpf.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300"> <Grid> <RichTextBox Height="100" Margin="42,40,36,122" Name="richTextBox1" Width="200" /> <Button Height="35" Margin="97,0,83,57" Name="button1" VerticalAlignment="Bottom" Click="button1_Click">Button</Button> </Grid> </Window>

 

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; namespace CSharp_Net_Wpf { /// <summary> /// Window1.xaml 的交互逻辑 /// </summary> public partial class Window1 : Window { public Window1() { InitializeComponent(); } private void UserParams(params string[] list) { for (int i = 0; i < list.Length; ++i ) { richTextBox1.AppendText(list[i] + "/r/n"); } } private void UserParams2(params object[] list) { for (int i = 0; i < list.Length; ++i ) { richTextBox1.AppendText((object)list[i].ToString() + "/r/n"); } } private void button1_Click(object sender, RoutedEventArgs e) { UserParams("How", "are", "you", "?"); UserParams2("How", 1, "456", 123); } } }

 

 private void UserParams(params object[] list)
        {
           。。。。。

        }可以接受任何类型的参数