Visual c# 2010学习笔记7

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 Selection
{
///<summary>
/// Interaction logic for Window.xaml
///</summary>
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
first.Text = DateTime.Today.ToString();
second.Text = DateTime.Today.ToString();
}
private void quitClick(object sender, RoutedEventArgs e)
{
this.Close();
}
private void compareClick(object sender, RoutedEventArgs e)
{
int diff = dateCompare(first.SelectedDate.Value, second.SelectedDate.Value);
info.Text = "";
show("first == second", diff == 0);
show("first != second", diff != 0);
show("first < second", diff < 0);
show("first <= second", diff <= 0);
show("first > second", diff > 0);
show("first >= second", diff >= 0);//show方法用于在文本框控件中比较结果}
private void show(string exp, bool result)
{
info.Text += exp;
info.Text += " : " + result.ToString();
info.Text += "\r\n";
}
private int dateCompare(DateTime leftHandSide, DateTime rightHandSide) {
//// TO DO
//return 42;
int result;
if (leftHandSide.Year < rightHandSide.Year)
result = -1;
else if (leftHandSide.Year > rightHandSide.Year)
result = 1;
else if (leftHandSide.Month < rightHandSide.Month)
result = -1;
else if (leftHandSide.Month > rightHandSide.Month)
result = 1;
else if (leftHandSide.Day < rightHandSide.Day)
result = -1;
else if (leftHandSide.Day > rightHandSide.Day)
result = 1;
else result = 0;
return result;
}
}
}
结果：
注：此题可以使用Datetime特殊类型来解决，具体详请查阅MSDN。

private void copyClick(object sender, RoutedEventArgs e) {
target.Text = "";//target：对象
string from = source.Text;
for (int i = 0; i !=from.Length; i++)
{
char current = from[i];//from字符串
copyOne(current);
}
}
private void copyOne(char current)
{
switch (current)
{
case'<':
target.Text+="&lt;";
break;
default:
target.Text += current;
break;
}
结果：
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 Microsoft.Win32;
using System.IO;
namespace WhileStatement
{
///<summary>
/// Interaction logic for MainWindow.xaml
///</summary>
public partial class MainWindow : Window
{
private OpenFileDialog openFileDialog = null;
public MainWindow()
{
InitializeComponent();
openFileDialog = new OpenFileDialog();
openFileDialog.FileOk += openFileDialogFileOk;
}
private void openFileClick(object sender, RoutedEventArgs e)
{
openFileDialog.ShowDialog();
}
private void openFileDialogFileOk(object sender,
ponentModel.CancelEventArgs e)
{
string fullPathname = openFileDialog.FileName;
FileInfo src = new FileInfo(fullPathname);
fileName.Text = ;
source.Text = "";//属性设置为空，可以清除当前显示的任何文本。

TextReader reader = src.OpenText();
string line = reader.ReadLine();
while (line != null)
{
source.Text += line + '\n';
line = reader.ReadLine();
}
reader.Close();
}
}
}
效果：。