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Rows, columns, and headers can be automatically resized as cell content changes so that the entire contents of cells are displayed without clipping. Changing sizing modes can also resize rows, columns, and headers. To determine the correct size, the DataGridView control must examine the value of each cell that it must accommodate. When working with large data sets, this analysis can negatively impact the performance of the control when automatic resizing occurs. To avoid performance penalties, use the following guidelines:

Avoid using automatic sizing on a DataGridView control with a large set of rows. If you do use automatic sizing, only resize based on the displayed rows. Use only the displayed rows in virtual mode as well.

For rows and columns, use the DisplayedCells or DisplayedCellsExceptHeaders field of the DataGridViewAutoSizeRowsMode, DataGridViewAutoSizeColumnsMode, and DataGridViewAutoSizeColumnMode enumerations.

For row headers, use the AutoSizeToDisplayedHeaders or AutoSizeToFirstHeader field of the DataGridViewRowHeadersWidthSizeMode enumeration.

For maximum scalability, turn off automatic sizing and use programmatic resizing.

What is the DataGridView

Differences between the DataGridView and DataGrid controls

Highlight of features

Structure of DGV

Architecture Elements

Cells and Bands