CODEWITHSUNDEEP
wpfxamlicommand
falukky
falukky

Reputation: 1139

WPF: how to pass 2 text properties from 2 TextBoxes into my Button command

So i have 2 TextBox and button with simple command:

    <Button ToolTip="Save" Command="{Binding SaveCommand}"/>

And i want to pass to this command the 2 Text properties from my 2 TexBox.

In case i want to pass only 1 Text property i used this command:

CommandParameter="{Binding Text, ElementName=yourTextBox}"

Any chance to do that without Converter ?

Upvotes: 0

Views: 984

Answers (2)

Pavel Anikhouski
Pavel Anikhouski

Reputation: 23258

You can try to create a converter for multiple values by implementing IMultiValueConverter interface:

public class MultiTextConverter : IMultiValueConverter
{
    public object Convert(object[] values, Type targetType, object parameter, CultureInfo culture)
    {
        //logic to aggregate two texts from object[] values into one object
    }

    public object[] ConvertBack(object value, Type[] targetTypes, object parameter, CultureInfo culture)
    {
        return new[] { Binding.DoNothing };
    }
}

Then use it in xaml. Declare the converter instance in Window or App resources

<ResourceDictionary>                    
    <MultiTextConverter x:Key="multiTextConverter"/>
</ResourceDictionary>

And use in button CommandParameter binding

<Button ToolTip="Save" Command="{Binding SaveCommand}">
   <Button.CommandParameter>
       <MultiBinding Converter="{StaticResource multiTextConverter}">
           <Binding ElementName="yourTextBox1" Path="Text"/>
           <Binding ElementName="yourTextBox2" Path="Text"/>
       </MultiBinding>
   </Button.CommandParameter>
</Button>

Upvotes: 1

Guido Cardinali
Guido Cardinali

Reputation: 376

Easiest way to do this would be to just bind the Text property of the two text boxes to strings in the View Model, and handle those strings inside the Execute() method of your ICommand.

View:

<TextBox x:Name="firstTextBox" Text="{Binding FirstText}"/>
<TextBox x:Name="secondTextBox" Text="{Binding SecondText}"/>

View Model:

public string FirstText { get; set; } //Also invoke PropertyChanged event if necessary
public string SecondText { get; set; }

Upvotes: 2

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