How to Implement Custom Pagination in a WinForms DataGridView?

Pagination in DataGridView: A Custom Solution

In many applications, it is necessary to display large amounts of data in a tabular format, while limiting the number of records shown on one page. Achieving pagination in WinForms' DataGridView can seem daunting, but a custom approach can provide a simple and efficient solution.

Creating a Custom IListSource

Rather than relying on built-in properties of DataGridView, this method utilizes a custom implementation of the IListSource interface. This class, PageOffsetList, generates a list of page offsets based on the total number of records and the desired page size.

Event Handling and Data Retrieval

When the user navigates to a different page using the BindingNavigator, the bindingSource1_CurrentChanged event is fired. This event retrieves the page offset from the BindingSource's current position and uses it to fetch the records for the corresponding page.

Example Implementation

The provided code example demonstrates how to achieve pagination using the custom class and event handling. It initializes the DataGridView with columns and sets the BindingNavigator as the source for binding operations. The bindingSource1 object is configured to use the PageOffsetList as its data source, and the bindingSource1_CurrentChanged event is subscribed to trigger data retrieval and display.

In summary, this custom approach allows for easy pagination in DataGridView by providing a flexible way to manage page offsets and retrieve data on demand. It offers a simple and maintainable solution for displaying large datasets in a user-friendly manner.

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