WPF XMAL ve CodeBehind arasındaki bağlantı ve eventlar

WPF de arayüzü XMAL kısmından kodluyoruz ve xmal.cs kısmından da CodeBehind tarafını C# ile kodluyoruz. Bu kodlamaları yaparken bir elemente ulaşmak için x:Name kodunu kullarak nesnelere isim veriyoruz.

Ardından butonlar için de Click=”OlayAdi” şeklinde isimlendirme yaparak Click eventları oluşturuyoruz.

<Window x:Class="WPFGiris.D3.MainWindow"         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"         xmlns:local="clr-namespace:WPFGiris.D3"         mc:Ignorable="d"         Title="Hesap Makinesi" Height="525" Width="350">     <Grid Margin="10">                  <Grid.ColumnDefinitions>             <ColumnDefinition Width="*"/>             <ColumnDefinition Width="*"/>             <ColumnDefinition Width="*"/>             <ColumnDefinition Width="*"/>         </Grid.ColumnDefinitions>         <Grid.RowDefinitions>             <RowDefinition Height="2*"/>             <RowDefinition Height="*"/>             <RowDefinition Height="*"/>             <RowDefinition Height="*"/>             <RowDefinition Height="*"/>             <RowDefinition Height="*"/>         </Grid.RowDefinitions>         <Label x:Name="resultLabel" Content="0" Grid.ColumnSpan="4" HorizontalAlignment="Right" VerticalAlignment="Bottom" FontSize="60"/>         <Button x:Name="acButton" Click="AcButton_Click" Content="AC" Grid.Row="1" Margin="5"/>         <Button x:Name="negativeButton" Click="NegativeButton_Click" Content="+/1" Grid.Row="1" Grid.Column="1" Margin="5"/>         <Button x:Name="percentageButton" Click="PercentageButton_Click" Content="%" Grid.Row="1" Grid.Column="2" Margin="5"/>         <Button x:Name="divisionButton" Content="/" Grid.Row="1" Grid.Column="3" Margin="5"/>         <Button x:Name="sevenButton" Click="SevenButton_Click" Content="7" Grid.Row="2" Grid.Column="0" Margin="5"/>         <Button x:Name="eightButton" Click="EightButton_Click" Content="8" Grid.Row="2" Grid.Column="1" Margin="5"/>         <Button x:Name="nineButton" Click="NineButton_Click" Content="9" Grid.Row="2" Grid.Column="2" Margin="5"/>         <Button x:Name="multiplicationButton" Content="*" Grid.Row="2" Grid.Column="3" Margin="5"/>         <Button x:Name="fourButton" Click="FourButton_Click" Content="4" Grid.Row="3" Grid.Column="0" Margin="5"/>         <Button x:Name="fiveButton" Click="FiveButton_Click" Content="5" Grid.Row="3" Grid.Column="1" Margin="5"/>         <Button x:Name="sixButton" Click="SixButton_Click" Content="6" Grid.Row="3" Grid.Column="2" Margin="5"/>         <Button x:Name="substractionButton" Content="-" Grid.Row="3" Grid.Column="3" Margin="5"/>         <Button x:Name="oneButton" Click="OneButton_Click" Content="1" Grid.Row="4" Grid.Column="0" Margin="5"/>         <Button x:Name="twoButton" Click="TwoButton_Click"  Content="2" Grid.Row="4" Grid.Column="1" Margin="5"/>         <Button x:Name="threeButton" Click="ThreeButton_Click"  Content="3" Grid.Row="4" Grid.Column="2" Margin="5"/>         <Button x:Name="sumButton" Click="SumButton_Click" Content="+" Grid.Row="4" Grid.Column="3" Margin="5"/>         <Button x:Name="zeroButton" Click="ZeroButton_Click" Content="0" Grid.Row="5" Grid.ColumnSpan="2" Margin="5"/>         <Button x:Name="dotButton" Content="." Grid.Row="5" Grid.Column="2" Margin="5"/>         <Button x:Name="equalButton" Click="EqualButton_Click" Content="=" Grid.Row="5" Grid.Column="3" Margin="5"/>     </Grid> </Window> 

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; 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 WPFGiris.D3 {     /// <summary>     /// MainWindow.xaml etkileşim mantığı     /// </summary>     public partial class MainWindow : Window     {         double lastNumber,result;         public MainWindow()         {             InitializeComponent();             //resultLabel.Content = "0"; //uygulama yüklenirken ilk atadığımız sayı... istersek başka sayı verebiliriz.              acButton.Click += AcButton_Click; //AcButton_Click olayını çalıştırır            // negativeButton.Click += NegativeButton_Click; Gerek yok.             percentageButton.Click += PercentageButton_Click;             equalButton.Click += EqualButton_Click;         }          private void SevenButton_Click(object sender, RoutedEventArgs e)         {             if (resultLabel.Content.ToString() == "0")             {                 resultLabel.Content = "7"; //0 ise 0 yerine 7 değerini atarız             }else             {                 resultLabel.Content = $"{resultLabel.Content}7"; //sıfır değil ise var olan metnin sonuna atama yaparız.                 // resultLabel.Content += "7"; bu şekilde de aynı sonuca varabilirsiniz.             }         }          private void EightButton_Click(object sender, RoutedEventArgs e)         {             if (resultLabel.Content.ToString() == "0")             {                 resultLabel.Content = "8";             }             else             {                 resultLabel.Content = $"{resultLabel.Content}8";             }         }          private void NineButton_Click(object sender, RoutedEventArgs e)         {             if (resultLabel.Content.ToString() == "0")             {                 resultLabel.Content = "9";             }             else             {                 resultLabel.Content = $"{resultLabel.Content}9";             }         }          private void FourButton_Click(object sender, RoutedEventArgs e)         {             if (resultLabel.Content.ToString() == "0")             {                 resultLabel.Content = "4";             }             else             {                 resultLabel.Content = $"{resultLabel.Content}4";             }         }          private void FiveButton_Click(object sender, RoutedEventArgs e)         {             if (resultLabel.Content.ToString() == "0")             {                 resultLabel.Content = "5";             }             else             {                 resultLabel.Content = $"{resultLabel.Content}5";             }         }          private void SixButton_Click(object sender, RoutedEventArgs e)         {             if (resultLabel.Content.ToString() == "0")             {                 resultLabel.Content = "6";             }             else             {                 resultLabel.Content = $"{resultLabel.Content}6";             }         }          private void OneButton_Click(object sender, RoutedEventArgs e)         {             if (resultLabel.Content.ToString() == "0")             {                 resultLabel.Content = "1";             }             else             {                 resultLabel.Content = $"{resultLabel.Content}1";             }         }          private void TwoButton_Click(object sender, RoutedEventArgs e)         {             if (resultLabel.Content.ToString() == "0")             {                 resultLabel.Content = "2";             }             else             {                 resultLabel.Content = $"{resultLabel.Content}2";             }         }          private void ThreeButton_Click(object sender, RoutedEventArgs e)         {             if (resultLabel.Content.ToString() == "0")             {                 resultLabel.Content = "3";             }             else             {                 resultLabel.Content = $"{resultLabel.Content}3";             }         }          private void SumButton_Click(object sender, RoutedEventArgs e)         {          }          private void ZeroButton_Click(object sender, RoutedEventArgs e)         {             if (resultLabel.Content.ToString() == "0")             {                 resultLabel.Content = "0";             }             else             {                 resultLabel.Content = $"{resultLabel.Content}0";             }         }          private void AcButton_Click(object sender, RoutedEventArgs e)         {             resultLabel.Content = "0";         }          private void PercentageButton_Click(object sender, RoutedEventArgs e)         {             if (double.TryParse(resultLabel.Content.ToString(), out lastNumber))             {                 lastNumber = lastNumber / 100;                 resultLabel.Content = lastNumber.ToString();             }         }          private void EqualButton_Click(object sender, RoutedEventArgs e)         {          }          private void NegativeButton_Click(object sender, RoutedEventArgs e)         {             if(double.TryParse(resultLabel.Content.ToString(), out lastNumber))             {                 lastNumber = lastNumber * (-1);                 resultLabel.Content = lastNumber.ToString();             }         }     } }