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For example, you might programmatically resize all columns immediately after loading data, or you might programmatically resize a specific row after a particular cell value has been modified. Get Preferred Width() methods or by calling protected resizing method overloads in a derived Data Grid View control. You will typically call the programmatic resizing methods at specific times.You can supplement bound mode by displaying unbound columns along with the bound columns.
With these values, you can limit which cells are used to calculate the preferred sizes. It is also useful to provide initial sizes for user-resizable rows, columns, and headers, and for column fill mode. Programmatic resizing is useful to avoid performance penalties with continuous resizing.This event occurs only for cells in unbound columns.Call the Update Cell Value method when changing a cached value outside of a Cell Value Pushed event handler to ensure that the current value is displayed in the control and to apply any automatic sizing modes currently in effect..
For more information about using virtual mode to maintain the values in unbound columns, see the examples in the Data Grid View Check Box Column. For example, you can use virtual mode to implement a just-in-time data loading mechanism that retrieves only as much data from a networked database as is necessary for optimal performance.