CODEWITHSUNDEEP
c#wpfxaml
aaron
aaron

Reputation: 397

Is it possible to dynamically add events to buttons in XAML?

I am new to WPF/XAML so please bear with the noob question.

I have designed a control panel that will eventually function as a backend for my website, and have just finished laying out all the buttons in tabs using TabControl element. (this is designed using the Visual Studio 'Window' forms.

My question is, is it possible to create a function in the xaml.cs file that will dynamically handle a specific event for all my button elements ? for example...

I have 30+ buttons and dont want 30 different Click="btnCustomers_click" + their respective functions in the c# code. What I desire is say one function that would allow me to click any button and then open a new window depending on which button was selected.

The below code is my current design however for 30+ buttons their will be alot of functions and it will be messy, hence my desire to have one function control which window is opened depending on which button is clicked.

        private void btnMerchants_click(object sender, RoutedEventArgs e)
    {
        var newWindow = new frmMerchants();
        newWindow.Show();
    }

Thanks in advance for any advice given!! :)

Upvotes: 4

Views: 2337

Answers (3)

Vicro
Vicro

Reputation: 575

You can use routed events on the parent container.
Example:

<Grid Button.Click="GeneralHandler">
 <!-- Some stuff -->
</Grid>

In the code behind:

public void GeneralHandler(object sender, RoutedEventArgs e)
{
 Button b = e.OriginalSource as Button;
 //<-- Do something
}

You can read more about it on MSDN.

Upvotes: 4

brunnerh
brunnerh

Reputation: 185410

You could use a style for this:

<Style TargetType="{x:Type Button}">
    <EventSetter Event="Click" Handler="btnMerchants_click"/>
</Style>

If you set this up in the resources somewhere without an x:Key it will apply to all buttons.

e.g. if you have a Grid and you want a certain style to apply to all Buttons in it you would define it like this:

<Grid>
    <Grid.Resources>
        <Style TargetType="{x:Type Button}">
            <EventSetter Event="Click" Handler="Button_Click"/>
        </Style>
    </Grid.Resources>
    <Grid.Children>
        <!-- Buttons and stuff -->
    </Grid.Children>
</Grid>

If you just want to apply it to some buttons set the x:Key and reference the style:

<Grid>
    <Grid.Resources>
        <Style x:Key="AttachClickHandlerStyle" TargetType="{x:Type Button}">
            <EventSetter Event="Click" Handler="Button_Click"/>
        </Style>
    </Grid.Resources>
    <Grid.Children>
        <Button Content="Click me!" Style="{StaticResource AttachClickHandlerStyle}"/>
        <Button Content="Click me, too!" Style="{StaticResource AttachClickHandlerStyle}"/>
        <Button Content="Something different." Click="SomeOtherButton_Click"/>
    </Grid.Children>
</Grid>

In general you should refactor any attributes that occur more than once into a style to prevent duplicate code.

Also, since you are a beginner the following articles might be of interest:

Styling and Templating
Resources Overview

Upvotes: 5

Andy
Andy

Reputation: 30135

Just assign the exact same Click="btnCustomers_click" handler (with a general function name) to all the buttons. Then in the function open the correct window based on the sender's Name.

Upvotes: 1

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