Скачать или смотреть Creating and Populating a DataGridView with a Dynamic List in WinForms

Learn how to dynamically create and populate a DataGridView in WinForms with a list of columns representing store prices, all without relying on DataTables.
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This video is based on the question https://stackoverflow.com/q/63367213/ asked by the user 'Rafael Rizolli' ( https://stackoverflow.com/u/14089527/ ) and on the answer https://stackoverflow.com/a/63370588/ provided by the user 'Caius Jard' ( https://stackoverflow.com/u/1410664/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Creating and Populating a DataGridView with a Dynamic List in WinForms

Introduction

Creating a WinForms application that captures prices for products from different stores can be an exciting challenge. However, when you want to display these prices dynamically in a DataGridView, it can lead to some complexity. Imagine wanting to show stores that can increase or decrease over time, without changing your entire data management code each time. The question arises: How can we dynamically populate a DataGridView with a variable number of stores?

In this guide, we will explore how to approach this problem, simplifying the implementation while staying adaptable to future changes. Let's dive into the solution!

Understanding the Data Structure

Before we get into the code, it’s important to understand the structure behind the data we are working with. In your case, the following classes are essential:

Produto (Product Class)

This class includes details such as IDProduto, NomeProduto, and prices from different stores represented with an enum for store identification.

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PesquisaGeral (General Search Class)

This acts as a container that holds a product and a list of price quotations from different stores.

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It's important that as your application expands, particularly if you plan to handle more stores, your architecture remains flexible.

Dynamic Population of DataGridView

While you mentioned creating your columns dynamically using a DataTable, there may be an alternative approach that avoids it. Here’s how you can implement dynamic column creation using collections in WinForms:

Step 1: Prepare the DataGridView

Initialize your DataGridView to hold the data for each product and its prices:

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Step 2: Add Dynamic Store Columns

Instead of hardcoding the columns based on your enum, retrieve the store names dynamically from a data source such as a database. Here’s an example of how you might add columns representing each store's price:

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Step 3: Populate the DataGridView

Next, populate the rows in the DataGridView based on your PesquisaGeral instances:

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Step 4: Handling New Stores

If a new store is added, simply ensure that your source for the store names is updated. This way, your DataGridView dynamically reflects the changes in your database without the need for recompiling your application.

Conclusion

To sum it up, dynamically creating and populating a DataGridView with an unknown number of columns based on varying stores is achievable by leveraging collections instead of relying solely on DataTables. This not only gives your application the flexibility to adapt but also maintains a clear structure for your data management needs.

For your WinForms applications, a clean separation of data modeling and display logic combined with dynamic column generation can greatly enhance usability and reduce future maintenance. Happy coding!