Simplifying C# Databinding for DataGridView: Efficient Filtering of Rows

Learn how to improve your C# `DataGridView` by implementing databinding and filtering rows with practical solutions and examples.
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This video is based on the question https://stackoverflow.com/q/71885224/ asked by the user 'DrPingouin' ( https://stackoverflow.com/u/18152210/ ) and on the answer https://stackoverflow.com/a/71888652/ provided by the user 'JohnG' ( https://stackoverflow.com/u/6842716/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Simplifying C# Databinding for DataGridView: Efficient Filtering of Rows

When developing Windows Forms applications, a common requirement is to display data in a user-friendly manner through controls like the DataGridView. If you're new to WinForms and looking to display data from your custom class, you've likely faced the challenge of filtering data displayed in your DataGridView. This guide aims to tackle that issue, providing you with a clear, concise solution to filter rows in your DataGridView using C# .

Understanding the Basics

The Problem

As a fledgling developer, you might have created a class to hold your data and populated a DataGridView to display that data. However, upon trying to filter your rows based on a specific column—like "File Name"—you might find it tricky, especially when working with BindingSource.

What is DataBinding?

DataBinding is a mechanism that allows you to connect your data source (like a list or a database) to a target UI element (like a DataGridView). This allows the UI to reflect any changes in the underlying data source automatically.

Moving Towards a Solution

Why Use a DataTable?

Your current implementation utilizes a List<Dataclass> which does not implement the IBindingListView interface, hindering capabilities like dynamic filtering with BindingSource. On the other hand, a DataTable implements this interface, making it more suitable for certain operations.

However, if you opt to continue using a List, we can leverage LINQ to implement filtering.

Simplifying Your DataClass

To begin, we should streamline your Dataclass. We will remove unnecessary properties and include only what is essential for the data structuring.

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Setting Up Your DataGridView

Next, let’s focus on populating your DataGridView without the BindingSource. This will simplify things significantly, allowing you flexibility, especially for filtering.

Here's the streamlined code for your form:

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Implementing Filtering with LINQ

Now to implement filtering based on the selection from a ComboBox or another control. Add buttons for filtering and unfiltering. Here’s how you could do it:

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Conclusion

By adopting a simplified approach to data handling in your DataGridView, not only can you avoid common pitfalls associated with BindingSource, but you also enhance your ability to efficiently manage your data structure. Using LINQ allows you to filter your data easily, which is especially useful for creating dynamic applications.

Remember, the key to effective data management in WinForms is understanding your data structure and how it interacts with your UI elements. Experiment with these principles, and soon you'll find yourself mastering data display and filtering in C# !
I hope this guide has been beneficial in clarifying data binding and filtering with DataGridView and inspires you to enhance your WinForms applications effectively using C# .

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