LostNativ
Member
- Joined
- May 7, 2021
- Messages
- 5
- Programming Experience
- Beginner
I am trying to create a WPF Watts Calculator. The user is to select the type of calculation from the combo box and then fill in the values click calculate and receive the result. However, I am getting a combo box error. I am not sure how to handle it. the error reads CS1061: 'type' does not contain a definition for 'name' and no accessible extension method 'name' accepting a first argument of type 'type' could be found (are you missing a using directive or an assembly reference?). The ms docs aren't to clear I am not quite following what is being said.
XAML
XAML
Xaml Cod:
<Window x:Class="S1P2.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:S1P2"
mc:Ignorable="d"
Title="Watt's Law Calculator" Height="450" Width="624.82"
WindowStartupLocation="CenterScreen">
<Grid Margin="10">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="326*"/>
<ColumnDefinition Width="271*"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="170*"/>
<RowDefinition Height="0*"/>
<RowDefinition Height="229*"/>
</Grid.RowDefinitions>
<Label x:Name="lblCalcType"
Content="Choose calculation type"
HorizontalAlignment="Left" Margin="49,50,0,0" VerticalAlignment="Top"
Width="138" Height="26"/>
<Label x:Name="lblFirstValue"
Content="First Value" HorizontalAlignment="Left" Margin="49,134,0,0"
VerticalAlignment="Top" RenderTransformOrigin="0.77,0.683" Width="103"/>
<Label x:Name="lblSecondValue"
Content="Second Value" HorizontalAlignment="Left" Margin="49,10,0,0"
Grid.Row="2" VerticalAlignment="Top" Width="103"/>
<Button x:Name="btnCalculate" Click="btnCalculate_Click" Content="Calculate" HorizontalAlignment="Left" Margin="49,117,0,0" VerticalAlignment="Top" Width="138" Height="36" Grid.Row="2"/>
<Button x:Name="btnClear" Click="btnClear_Click" Content="Clear" HorizontalAlignment="Left" Margin="120.072,117,0,0" VerticalAlignment="Top" Width="100" Height="36" RenderTransformOrigin="0.952,0.432" Grid.Row="2" Grid.Column="1"/>
<Label x:Name="lblResult" Content="Result" HorizontalAlignment="Left" Margin="49,55,0,0" Grid.Row="2" VerticalAlignment="Top" RenderTransformOrigin="-0.137,0.267" Width="66"/>
<TextBox Name="txtFirstValue" Grid.Column="1" HorizontalAlignment="Left" Height="23" Margin="120,138,0,0" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="120" RenderTransformOrigin="-0.016,1.503" TextChanged="txtFirstValue_TextChanged"/>
<TextBox Name="txtSecondValue" Grid.Column="1" HorizontalAlignment="Left" Height="23" Margin="120,22,0,0" Grid.Row="2" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="120" TextChanged="txtSecondValue_TextChanged"/>
<TextBox Name="txtResult" Grid.Column="1" HorizontalAlignment="Left" Height="23" Margin="120,67,0,0" Grid.Row="2" TextWrapping="Wrap" Text="TextBox" VerticalAlignment="Top" Width="120" TextChanged="txtResult_TextChanged"/>
<StackPanel Margin="0,0,112,0">
<Menu Height="25" Margin="0,0,-358,0">
<MenuItem Header="File" Height="25" Width="140">
<MenuItem Header="Close"/>
</MenuItem>
</Menu>
</StackPanel>
<ComboBox x:Name="cboCalcType" SelectedIndex="0" HorizontalAlignment="Left" Margin="68,54,0,0" VerticalAlignment="Top" Width="152" RenderTransformOrigin="0.065,1.304" Height="22" Grid.Column="1" SelectionChanged="CboCalcType_SelectionChanged">
<ComboBoxItem Content="Power" HorizontalAlignment="Left" Width="150" Selected="ComboBoxItem_Selected"/>
<ComboBoxItem Content="Voltage" HorizontalAlignment="Left" Width="150" Selected="ComboBoxItem_Selected"/>
<ComboBoxItem Content="Current" HorizontalAlignment="Left" Width="150" Selected="ComboBoxItem_Selected"/>
</ComboBox>
</Grid>
</Window>
Code Behind:
Code Behind
namespace S1P2
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
public delegate float WattsLawDelegate(float val1, float val2);
public MainWindow()
{
InitializeComponent();
ComboBox cboCalcType = new ComboBox();
cboCalcType.SelectedIndex = 0;
}//end main window
public float CalcPower(float current, float voltage)
{
//
//Name : float CalcPower(float current, float resistance)
//Purpose : Calculate the Power using Watt's Law
//Re-use : None
//Method Parameters : - float current
// - current value in amps
// - float voltage
// - voltage value in volts
//Output Type : float
// - the calculated Power value
//
float power = 0;
try
{
power = current * voltage;
} // end try
catch (Exception)
{
} // end catch
return power;
} // end method
public float CalcVoltage(float power, float current)
{
//
//Name : float CalcVoltage(float power, float current)
//Purpose : Calculate the Voltage using Watt's Law
//Re-use : None
//Method Parameters : - float power
// - power value in watts
// - float current
// - current value in amps
//Output Type : float
// - the calculated Voltage value
//
float voltage = 0;
try
{
voltage = power / current;
} // end try
catch (Exception)
{
} // end catch
return voltage;
} // end method
public float CalcCurrent(float power, float voltage)
{
//
//Name : float CalcCurrent(float power, float voltage)
//Purpose : Calculate the Current using Watt's Law
//Re-use : None
//Method Parameters : - float power
// - power value in watts
// - float voltage
// - voltage value in volts
//Output Type : float
// - the calculated Current value
//
float current = 0;
try
{
current = power / voltage;
} // end try
catch (Exception)
{
} // end catch
return current;
} // end method
private void btnCalculate_Click(object sender, RoutedEventArgs e)
{
WattsLawDelegate wattsLawDel = null;
float txtFirstValue = 0;
float txtSecondValue = 0;
float txtResult = 0;
float option = 10;
float result = 0;
option = cboCalcType.SelectedIndex;
switch (option)
{
case 0:
txtFirstValue = float.Parse(txtFirstValue + "");
txtSecondValue = float.Parse(txtSecondValue + "");
wattsLawDel = new WattsLawDelegate(CalcPower);
lblResult.ContentStringFormat = "The calculated power is:";
// valid = true;
break;
case 1:
txtFirstValue = float.Parse(txtFirstValue + "");
txtSecondValue = float.Parse(txtSecondValue + "");
wattsLawDel = new WattsLawDelegate(CalcCurrent);
lblResult.ContentStringFormat = "The calculated current is:";
// valid = true;
break;
case 2:
txtFirstValue = float.Parse(txtFirstValue + "");
txtSecondValue = float.Parse(txtSecondValue + "") ;
wattsLawDel = new WattsLawDelegate(CalcVoltage);
lblResult.ContentStringFormat = "The calculated voltage is:";
//valid = true;
break;
default:
break;
} // end switch
result = wattsLawDel(txtFirstValue, txtFirstValue);
txtResult = float.Parse(result + " ");
}
private void btnClear_Click(object sender, RoutedEventArgs e)
{
txtFirstValue.Clear();
txtSecondValue.Clear();
txtResult.Clear();
cboCalcType.SelectedIndex = 0;
}
private void CboCalcType_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
switch (cboCalcType.SelectedIndex)
{
case 0:
lblFirstValue.ContentStringFormat = "current";
lblSecondValue.ContentStringFormat = "voltage";
break;
case 1:
lblFirstValue.ContentStringFormat = "power";
lblSecondValue.ContentStringFormat = "voltage";
break;
case 2:
lblFirstValue.ContentStringFormat = "power";
lblSecondValue.ContentStringFormat = "currrent";
break;
default:
break;
}//end switch
}
private void txtFirstValue_TextChanged(object sender, TextChangedEventArgs e)
{
}
private void txtSecondValue_TextChanged(object sender, TextChangedEventArgs e)
{
}
private void txtResult_TextChanged(object sender, TextChangedEventArgs e)
{
}
private void CommandCanExecute(object sender, CanExecuteRoutedEventArgs e)
{
}
private void CommandExecuted(object sender, ExecutedRoutedEventArgs e)
{
}
}
}//end namespace
