我如何将多种方法组合成一种方法

Question

我有 15 个字段几乎做同样的事情：

    private void TextboxMessage1_TextChanged(object sender, TextChangedEventArgs e)
    {
      SaveMessage(TextboxMessage1.Text, TextboxMessageSeconds1.Text.ToInteger(), 1);
    }

    private void TextboxMessage2_TextChanged(object sender, TextChangedEventArgs e)
    {
      SaveMessage(TextboxMessage2.Text, TextboxMessageSeconds2.Text.ToInteger(), 2);
    }

    private void TextboxMessage3_TextChanged(object sender, TextChangedEventArgs e)
    {
      SaveMessage(TextboxMessage3.Text, TextboxMessageSeconds3.Text.ToInteger(), 3);
    }

etc

调用SaveMessage：

private void SaveMessage(string textboxMessageText, int seconds, int messagenumber)
{
  var msg = _configman.MyConfig.MessageConfigs.FirstOrDefault(x => x.MessageNumber == messagenumber);

  if (msg == null)
  {
    var msgconfig = new MessageConfig();
    msgconfig.Seconds = seconds;
    msgconfig.Command = textboxMessageText;
  }
  else
  {
    msg.MessageNumber = messagenumber;
    msg.Command = textboxMessageText;
    msg.Seconds = seconds;
  }
  _configman.SaveConfig();
}

我的表格：

<CheckBox x:Name="CheckBoxMessage1" Content="" HorizontalAlignment="Left" Margin="29,23,0,0" VerticalAlignment="Top" Width="15"/>
<TextBox x:Name="TextboxMessage1" Height="23" Margin="49,19,158,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" TextChanged="TextboxMessage1_TextChanged"/>
<Button x:Name="ButtonMessage1" Content="Disabled" HorizontalAlignment="Left" Margin="689,20,0,0" VerticalAlignment="Top" Width="75" Background="#FFFB8686" Click="ButtonMessage1_Click"/>
<CheckBox x:Name="CheckBoxMessage2" Content="" HorizontalAlignment="Left" Margin="29,48,0,0" VerticalAlignment="Top" Width="15"/>
<TextBox x:Name="TextboxMessage2" Height="23" Margin="49,44,158,0" TextWrapping="Wrap" VerticalAlignment="Top" TextChanged="TextboxMessage2_TextChanged"/>
<Button x:Name="ButtonMessage2" Content="Disabled" HorizontalAlignment="Left" Margin="689,45,0,0" VerticalAlignment="Top" Width="75" Background="#FFFB8686"/>
<CheckBox x:Name="CheckBoxMessage3" Content="" HorizontalAlignment="Left" Margin="29,72,0,0" VerticalAlignment="Top" Width="15"/>
<TextBox x:Name="TextboxMessage3" Height="23" Margin="49,68,158,0" TextWrapping="Wrap" VerticalAlignment="Top" TextChanged="TextboxMessage3_TextChanged"/>
<Button x:Name="ButtonMessage3" Content="Disabled" HorizontalAlignment="Left" Margin="689,69,0,0" VerticalAlignment="Top" Width="75" Background="#FFFB8686"/>

有没有办法让 TextChanged 覆盖我所有的文本框，这样我就不必为每个文本框创建 TextChanged 了？

它们编号为 1-15，例如 TextboxMessage1、TextboxMessage1 等。

这可能吗？如果是这样，我该怎么做？

Answer 1

为什么不对每个 TextChanged 事件使用相同的“通用”回调，例如“TextboxMessage_TextChanged”。 那么：

<TextBox x:Name="TextboxMessage1" Height="23" Margin="49,19,158,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" TextChanged="TextboxMessage_TextChanged"/>

private void TextboxMessage_TextChanged(object sender, TextChangedEventArgs e)
{
  TextBox tb = sender as TextBox;
  int index = int.Parse(tb.Name.Substring("TextboxMessage".Length));
  TextBox secondTextBox = (TextBox)this.FindName("TextboxMessageSeconds" + index);
  SaveMessage(tb.Text, secondTextBox.Text.ToInteger(), index);
}

这是你所期待的吗？

Answer 2

最好的方法是使用继承自 TextBox 的 int 属性创建一个新类

//Come up with a better name
public class CustomTextBox : TextBox
{
    public int Number { get; set; }
}

然后在您的 xaml 中将属性类型更改为 CustomTextBox（或您命名的任何名称）。确保添加Number 属性并将TextChanged 属性更改为“TextBoxSave_TextChanged”：

<CustomTextBox x:Name="TextboxMessage1" Height="23" Margin="49,19,158,0" TextWrapping="Wrap" Text="" VerticalAlignment="Top" TextChanged="TextBoxSave_TextChanged" Number="1"/>

然后在你的代码后面添加一个新方法TextBoxSave_TextChanged()

//You can name it whatever, I would keep the "_TextChanged" suffix though
private void TextBoxSave_TextChanged(object sender, TextChangedEventArgs e)
{
    //Cast sender to your new CustomTextBox type
    CustomTextBox txtBox = ((CustomTextBox)sender);

    SaveMessage(txtBox.Text, txtBox.Text.ToInteger(), txtBox.Number);
}

---

艾德的建议：

public class CustomTextBox : TextBox
{
    #region Number Property
    public int Number
    {
        get { return (int)GetValue(NumberProperty); }
        set { SetValue(NumberProperty, value); }
    }

    public static readonly DependencyProperty NumberProperty =
        DependencyProperty.Register(nameof(Number), typeof(int), typeof(CustomTextBox),
            new PropertyMetadata(0));
    #endregion Number Property

    #region Seconds Property
    public int Seconds
    {
        get { return (int)GetValue(SecondsProperty); }
        set { SetValue(SecondsProperty, value); }
    }

    public static readonly DependencyProperty SecondsProperty =
        DependencyProperty.Register(nameof(Seconds), typeof(int), typeof(CustomTextBox),
            new PropertyMetadata(0));
    #endregion Seconds Property
}

TextChanged 处理程序：

//  You can name it whatever, I would keep the "_TextChanged" suffix though
private void TextBoxSave_TextChanged(object sender, TextChangedEventArgs e)
{
    //Cast sender to your new CustomTextBox type
    CustomTextBox txtBox = (CustomTextBox)sender;

    SaveMessage(txtBox.Text, txtBox.Seconds, txtBox.Number);
}

XAML 用法：

<local:CustomTextBox 
    Number="1"
    Seconds="{Binding Text, ElementName=TextboxMessageSeconds1}"
    TextChanged="TextBoxSave_TextChanged" 

    x:Name="TextboxMessage1" 
    Height="23" 
    Margin="49,19,158,0" 
    TextWrapping="Wrap"
    VerticalAlignment="Top" 
    />

但实际上，这是编写适当的 UserControl 的糟糕替代品。