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Convert List, DataTable.` The DataGridView control can display a List. This can be done by converting the List to a DataTable first.`Some notes.` With some custom List-to-DataTable conversion logic, we get the best performance from the DataGridView by using the DataSource property.`420px`330px`An example.` This example shows a List of string arrays. This is a data structure that could be parsed from a text file easily, as with the Split method. `Method: `We introduce the ConvertListToDataTable method, which converts a List<string[]> to a DataTable.`Arrays `array`We create a new empty DataTable. Next, we find the maximum number of columns that will be required by looping through the input List.`Then: `We add those columns, and then add all the rows. We return the DataTable.`Assign to DataSource.` Once we have a DataTable instance, it is appropriate to assign it to the DataSource property. Assigning the List<string[]> to the DataSource will not work correctly. `DataSource `datasource`The DataSource provides the best performance for displaying large amounts of data instantly in a DataGridView.`Warning: `If you were to add Columns and Rows individually, slowdowns are more likely to occur.`Discussion.` DataTable can be used as an optimization. Using controls in Windows Forms or WPF directly often results in rendering. `However: `This is often much slower, and more processor-intensive, than in-memory operations.`So: `When using DataGridView or similar controls, processing the data first seems like it might be slower, but it ends up much faster.`DataGridView `datagridview`A summary.` We converted a List of string arrays into a DataTable. This yielded a collection that can be displayed in a DataGridView with the DataSource property. Our code was effective. `List `list`DataTable `datatable`You could imperatively` add rows and columns to the DataGridView. But this can be slower. Building a collection in-memory with a DataTable is often more effective.

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!Kconverts List to DataTable for DataGridView