Enable Submit Button Dynamically in UWP C# Based on TextBox Values

Learn how to dynamically enable the submit button in your UWP app when all required textboxes have values using data binding in C# .
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This video is based on the question https://stackoverflow.com/q/67210969/ asked by the user 'Htet Phyo Naing' ( https://stackoverflow.com/u/12960148/ ) and on the answer https://stackoverflow.com/a/67227543/ provided by the user 'dear_vv' ( https://stackoverflow.com/u/13655706/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Dynamically Enabling the Submit Button in UWP C# Based on TextBox Values

In app development, particularly with UWP (Universal Windows Platform), ensuring that users complete all required fields before submitting forms is a common requirement. If you're building a UWP application and want to dynamically enable a submit button only when all necessary textboxes have values, you might find yourself searching for an efficient solution.

The goal is to enable a submit button only when every required input field has been filled out, instead of having to write separate validation handlers for each input control, which can lead to tedious and error-prone code. Fortunately, there is a clean and efficient way to achieve this using data binding. This article will guide you through implementing this feature step-by-step.

Solution Overview

Instead of adding individual event handlers for each textbox, we can bind the properties of our UI elements to property values in the code behind. We will create properties for the textbox contents and a Boolean property to control the button's enabled state.

Steps to Implement

Define Properties: In the code behind, define properties for the textboxes and the button’s enabled state.

Set Up Data Binding: Bind these properties to the respective UI elements in XAML.

Implement Logic to Update the Button State: Create method logic to update the button's state based on the input values.

Step 1: Define the Properties

In your code behind (let’s say MainPage.xaml.cs), you will need to define string properties for the textbox inputs and a Boolean property for button enabling. Here's how:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Set Up Data Binding

Next, move to your XAML file (MainPage.xaml). Bind the properties defined in the code behind to the respective UI elements. Your XAML structure would look something like this:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Update the Button State

As illustrated in the code behind, the UpdateButtonState method checks if all the fields are populated. The button will be enabled only if both textboxes have values, and the checkbox is checked.

Conclusion

Using this method of data binding in UWP C# , you can easily manage the state of controls like buttons based on user inputs without cluttering your code with repetitive event handlers. By leveraging properties and binding them directly to your UI, you can ensure a more efficient and maintainable code structure.

Now your submit button will only be enabled when all required fields are filled out, improving the user experience in your app.

Happy coding! If you have any questions or need further clarification, feel free to ask!

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