实例介绍
【实例简介】
四则运算
【实例截图】
【核心代码】
private void LoadComponent()
{
eOperator = EOperator.NONE;
splitIndex = 0;
textBoxShow = (TextBox)LogicalTreeHelper.FindLogicalNode(dependencyObject, "textBox");
// 功能按键
btnClear = (Button)LogicalTreeHelper.FindLogicalNode(dependencyObject, "btnClear");
btnClear.Click = OnButtonClearClick;
btnEqual = (Button)LogicalTreeHelper.FindLogicalNode(dependencyObject, "btnEqual");
btnEqual.Click = OnButtonEqualClick;
btnOff = (Button)LogicalTreeHelper.FindLogicalNode(dependencyObject, "btnOff");
btnOff.Click = OnButtonOffClick;
btnDelete = (Button)LogicalTreeHelper.FindLogicalNode(dependencyObject, "btnDelete");
btnDelete.Click = OnButtonDeleteClick;
// 运算按键
arrayBtnOperator = new Button[4];
for (int i = 0; i < 4; i)
{
arrayBtnOperator[i] = (Button)LogicalTreeHelper.FindLogicalNode(dependencyObject, "operator" i.ToString());
arrayBtnOperator[i].Click = OnButtonOperatorClick;
}
// 数字按键
arrayBtnNumber = new Button[10];
for (int i=0; i<=9; i)
{
arrayBtnNumber[i] = (Button)LogicalTreeHelper.FindLogicalNode(dependencyObject, "number" i.ToString());
arrayBtnNumber[i].Click = OnButtonNumberClick;
}
}
private void InitializeComponent()
{
//// 设置窗体
//this.Width = 480;
//this.Height = 320;
//this.Left = this.Top = 100;
//this.Title = "Code-Only Window";
//// 创建停靠面板对象
//DockPanel dockPanel = new DockPanel();
//// 创建按钮对象
//button = new Button();
//button.Content = "Start";
//button.Margin = new Thickness(50);
//button.Click = ButtonClick;
//MediaElement mediaElement = new MediaElement();
//System.Uri uri = new System.Uri("F:/音乐/蔡依林&&周杰伦 - 布拉格广场.mp3");
//mediaElement.Source = uri;
//mediaElement.Stretch = System.Windows.Media.Stretch.Fill;
//IAddChild container = dockPanel;
//container.AddChild(button);
//// container.AddChild(mediaElement);
//container = this;
//container.AddChild(dockPanel);
}
private void OnButtonNumberClick(object sender, RoutedEventArgs e)
{
Button btn = (Button)sender;
textBoxShow.Text = btn.Content.ToString();
}
private void OnButtonClearClick(object sender, RoutedEventArgs e)
{
textBoxShow.Text = "";
}
private void OnButtonOperatorClick(object sender, RoutedEventArgs e)
{
if (eOperator != EOperator.NONE)
{
OnButtonEqualClick(null, null);
}
Button btn = (Button)sender;
if (textBoxShow.Text.Length == 0)
{
textBoxShow.Text = "0";
}
textBoxShow.Text = btn.Content.ToString();
splitIndex = textBoxShow.Text.Length - 1;
switch(btn.Content.ToString())
{
case " ":
eOperator = EOperator.ADD;
break;
case "-":
eOperator = EOperator.SUB;
break;
case "*":
eOperator = EOperator.MUL;
break;
case "/":
eOperator = EOperator.DIV;
break;
}
}
private void OnButtonEqualClick(object sender, RoutedEventArgs e)
{
if (eOperator == EOperator.NONE)
return;
if (splitIndex == textBoxShow.Text.Length - 1)
{
textBoxShow.Text = "0";
}
Operation operation = OperationFactory.CreateOperation(eOperator);
string strA = textBoxShow.Text.Substring(0, splitIndex);
string strB = textBoxShow.Text.Substring(splitIndex 1);
if (strA == "" || strB == "")
{
return;
}
operation.NumberA = Convert.ToDouble(strA);
operation.NumberB = Convert.ToDouble(strB);
textBoxShow.Text = operation.GetResult().ToString();
eOperator = EOperator.NONE;
}
private void OnButtonOffClick(object sender, RoutedEventArgs e)
{
Application.Current.Shutdown();
}
private void OnButtonDeleteClick(object sender, RoutedEventArgs e)
{
if (textBoxShow.Text.Length > 0)
{
textBoxShow.Text = textBoxShow.Text.Substring(0, textBoxShow.Text.Length-1);
}
}
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