dotnetmonitor.com

Column fill mode causes the visible columns in the control to fill the width of the control's display area. For more information about this mode, see the Column Fill Mode section below.

You can also configure rows, columns, and headers to automatically adjust their sizes to fit their cell contents. In this case, size adjustment occurs whenever cell contents change.

Note: If you maintain cell values in a custom data cache using virtual mode, automatic sizing occurs when the user edits a cell value but does not occur when you alter a cached value outside of a CellValuePushed event handler. In this case, call the UpdateCellValue method to force the control to update the cell display and apply the current automatic sizing modes.

If content-based automatic sizing is enabled for one dimension onlythat is, for rows but not columns, or for columns but not rowsand WrapMode is also enabled, size adjustment also occurs whenever the other dimension changes. For example, if rows but not columns are configured for automatic sizing and WrapMode is enabled, users can drag column dividers to change the width of a column and row heights will automatically adjust so that cell contents are still fully displayed.

If you configure both rows and columns for content-based automatic sizing and WrapMode is enabled, the DataGridView control will adjust sizes whenever cell contents changed and will use an ideal cell height-to-width ratio when calculating new sizes.

To configure the sizing mode for headers and rows and for columns that do not override the control value, set one or more of the following DataGridView properties:

         ColumnHeadersHeightSizeMode

         RowHeadersWidthSizeMode

         AutoSizeColumnsMode

         AutoSizeRowsMode

To override the control's column sizing mode for an individual column, set its AutoSizeMode property to a value other than NotSet. The sizing mode for a column is actually determined by its InheritedAutoSizeMode property. The value of this property is based on the column's AutoSizeMode property value unless that value is NotSet, in which case the control's AutoSizeColumnsMode value is inherited.

Use content-based automatic resizing with caution when working with large amounts of data. To avoid performance penalties, use the automatic sizing modes that calculate sizes based only on the displayed rows rather than analyzing every row in the control. For maximum performance, use programmatic resizing instead so that you can resize at specific times, such as immediately after new data is loaded.

Content-based automatic sizing modes do not affect rows, columns, or headers that you have hidden by setting the row or column Visible property or the control RowHeadersVisible or ColumnHeadersVisible properties to false. For example, if a column is hidden after it is automatically sized to fit a large cell value, the hidden column will not change its size if the row containing the large cell value is deleted. Automatic sizing does not occur when visibility changes, so changing the column Visible property back to true will not force it to recalculate its size based on its current contents.

Programmatic content-based resizing affects rows, columns, and headers regardless of their visibility.