1.首先布局计算器页面,用grid stackpanel 布局,并绘制一个4*4的表格,用来放动态生成的控件.
<StackPanel Background="Gray">
<TextBox TextWrapping="Wrap" Height="120" Margin="5,5,5,5" Name="txtInformation" KeyDown="txtInformation_KeyDown" FontSize="30" FontWeight="Bold" >
</TextBox>
<StackPanel Orientation="Horizontal">
<Button Name="btnClear" Content="清零" Height="40" FontSize="20" Width="100" Margin="60,0,60,0" Click="btnClear_Click"></Button>
<Button Name="btnBack" Content="BackSpace" FontSize="20" Click="btnBack_Click"></Button>
</StackPanel>
<Grid Name="keyHome" Loaded="keyHome_Loaded" >
<Grid.Background>
<RadialGradientBrush>
<GradientStop Color="Black" Offset="0"/>
<GradientStop Color="White" Offset="1"/>
</RadialGradientBrush>
</Grid.Background>
<Grid.ColumnDefinitions>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
<ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
<RowDefinition></RowDefinition>
</Grid.RowDefinitions>
</Grid>
</StackPanel>
2.禁用传统键盘上字符的响应
private void txtInformation_KeyDown(object sender, KeyRoutedEventArgs e) //禁用传统键盘
{
if (e.Key < VirtualKey.Number0|| e.Key > VirtualKey.Number9)
{
if (e.Key < VirtualKey.NumberPad0 || e.Key > VirtualKey.NumberPad9)
{
if (e.Key != VirtualKey.Back)
{
e.Handled = true;
}
}
}
}
3.动态生成按钮
private void keyHome_Loaded(object sender, RoutedEventArgs e)
{
txtInformation.Text = calculator.Sum.ToString();
char[] keyName = new char[] { '7', '8', '9', '/', '4', '5', '6', '*', '1', '2', '3', '-', '0', '.', '=', '+' };
for (int i = 0; i < keyHome.RowDefinitions.Count; i++)
{
for (int j = 0; j < keyHome.ColumnDefinitions.Count; j++)
{
int numKey = ((i) * 4) + (j + 1) - 1;
Button bt = new Button
{
Content = keyName[numKey],
Height = 100,
Width=150,
FontSize = 50
};
if (bt.Content.ToString() == "+" || bt.Content.ToString() == "-" || bt.Content.ToString() == "*" || bt.Content.ToString() == "/")
{
bt.Click += new RoutedEventHandler(btn_add_Click);
}
else if (bt.Content.ToString() == "=")
{
bt.Click += new RoutedEventHandler(btn_an_Click);
}
else
{
bt.Click += new RoutedEventHandler(Button0_Click);
}
Grid.SetRow(bt, i);
Grid.SetColumn(bt, j);
keyHome.Children.Add(bt);
}
}
}
4.各按钮的响应事件
private void btn_an_Click(object sender, RoutedEventArgs e)
{
string dbSecond = txtInformation.Text;
string[] dbnum = dbSecond.Split(calculator.StrOper);
if (dbnum.Length > 1)
{
try
{
calculator.Num1 = Convert.ToDouble(dbnum[0]);
if (dbnum[1] == "")
{
calculator.Num2 = -Convert.ToDouble(dbnum[2]);
}
calculator.Num2 = Convert.ToDouble(dbnum[1]);
}
catch
{
}
}
//calculator.Num2 = dbSecond;
switch (calculator.StrOper) //输入了第二运算数，按上次记录的运算符号运算
{
case '+':
calculator.Sum = calculator.Num1 + calculator.Num2;
break;
case '-':
calculator.Sum = calculator.Num1 - calculator.Num2;
break;
case '*':
calculator.Sum = calculator.Num1 * calculator.Num2;
break;
case '/':
if (calculator.Num2 != 0)
{
calculator.Sum = calculator.Num1 / calculator.Num2;
}
else
{
MessageDialog message = new MessageDialog("老师说了，零不能作为被除数");
message.ShowAsync();
}
break;
default:
calculator.Sum = calculator.Num2;
break;
}
if (calculator.Sum != calculator.Num2)
{
string s = calculator.StrOper.ToString(); ;
txtInformation.Text = calculator.Sum.ToString();
}
calculator.Num1 = calculator.Sum;
}
private void btn_click(object sender, RoutedEventArgs e)
{
Button b1 = (Button)sender;
if (b1.Content.ToString() == "+" || b1.Content.ToString() == "-" || b1.Content.ToString() == "*" || b1.Content.ToString() == "/")
{
//MessageBox.Show("ok");
}
}
private void btn_add_Click(object sender, RoutedEventArgs e)//运算符号按钮单击事件
{
//记录此次运算符号
Button btn = (Button)sender;
if (!txtInformation.Text.Contains("+") && !txtInformation.Text.Contains("--") && !txtInformation.Text.Contains("*") && !txtInformation.Text.Contains("/"))
{
calculator.StrOper = (char)btn.Content;
txtInformation.Text += calculator.StrOper;
}
calculator.PointNum = 0;
}
private void Button0_Click(object sender, RoutedEventArgs e) //按钮0-9单击事件及小数点
{
Button b1 = (Button)sender;
if (b1.Content.ToString() == ".")
{
calculator.PointNum += 1;
}
if (calculator.PointNum > 1)
{
if (b1.Content.ToString() != ".")
{
txtInformation.Text += b1.Content;
}
}
else if (txtInformation.Text != "0")
{
txtInformation.Text += b1.Content;
}
else
{
txtInformation.Text = b1.Content.ToString();
}
}
private void btnClear_Click(object sender, RoutedEventArgs e)
{
if (txtInformation.Text != "0")
{
txtInformation.Text = "0";
calculator.PointNum = 0;
calculator.Num1 = 0;
calculator.Num2 = 0;
}
}
private void btnBack_Click(object sender, RoutedEventArgs e)
{
if (txtInformation.Text.Length > 0 && txtInformation.Text != "0")
{
txtInformation.Text = txtInformation.Text.Substring(0, txtInformation.Text.Length - 1);
}
}