Skip to content

Completed #3

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
MikeHickey17 wants to merge 1 commit into
base: master
Choose a base branch
from
Open

Completed #3

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
35 changes: 32 additions & 3 deletions CalculatorMVVM/ViewModels/MainWindowViewModel.cs
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -10,9 +10,13 @@ public class MainWindowViewModel : BindableBase
public string Num1
{
get => _Num1;
set {
set
{
SetProperty(ref _Num1, value);
AddCommand.RaiseCanExecuteChanged();
SubCommand.RaiseCanExecuteChanged();
MultiCommand.RaiseCanExecuteChanged();
DivideCommand.RaiseCanExecuteChanged();
}
}

Expand All @@ -25,6 +29,9 @@ public string Num2
{
SetProperty(ref _Num2, value);
AddCommand.RaiseCanExecuteChanged();
SubCommand.RaiseCanExecuteChanged();
MultiCommand.RaiseCanExecuteChanged();
DivideCommand.RaiseCanExecuteChanged();
}
}

Expand All @@ -33,7 +40,7 @@ public string Result
{
get => _Result;
set => SetProperty(ref _Result, value);

}

public DelegateCommand AddCommand { get; }
Expand All @@ -44,6 +51,12 @@ public string Result
public MainWindowViewModel()
{
AddCommand = new DelegateCommand(Add, CanCalculate);

SubCommand = new DelegateCommand(Sub, CanCalculate);

MultiCommand = new DelegateCommand(Multi, CanCalculate);

DivideCommand = new DelegateCommand(Divide, CanDivide);
}

private void Add()
Expand All @@ -53,14 +66,17 @@ private void Add()

private void Sub()
{
Result = (_dblNum1 - _dblNum2).ToString();
}

private void Multi()
{
Result = (_dblNum1 * _dblNum2).ToString();
}

private void Divide()
{
Result = (_dblNum1 / _dblNum2).ToString();
}

public bool CanCalculate()
Expand All @@ -77,7 +93,20 @@ public bool CanCalculate()

public bool CanDivide()
{
return default;
var problem = !double.TryParse(Num1, out _dblNum1) || !double.TryParse(Num2, out _dblNum2);

if (problem)
{
return false;
}
else if(_dblNum2 == 0)
{
return false;
}
else
{
return true;
}
}
}
}
5 changes: 4 additions & 1 deletion CalculatorMVVM/Views/MainWindow.xaml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -20,9 +20,12 @@
<TextBox x:Name="txtNum2" Margin="5" Grid.Row="0" Grid.Column="2" Grid.ColumnSpan="2" Text="{Binding Num2, UpdateSourceTrigger=PropertyChanged}" />

<Button x:Name="btnAdd" Margin="5" Grid.Row="1" Command="{Binding AddCommand}" Grid.Column="0" Content="+"/>

<Button x:Name="btnSub" Margin="6,5.333,4.667,5.333" Grid.Row="1" Command="{Binding SubCommand}" Grid.Column="1" Content="-"/>
<Button x:Name="btnDivide" Margin="5.333,6.333,4.667,4.667" Grid.Row="1" Command="{Binding DivideCommand}" Grid.Column="3" Content="/"/>
<Button x:Name="btnMulti" Margin="5.333,5.333,4.667,6" Grid.Row="1" Command="{Binding MultiCommand}" Grid.Column="2" Content="*"/>

<TextBox x:Name="txtResult" Margin="5" Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="4" Text="{Binding Result}"/>


</Grid>
</Window>