Datagridviewcomboboxcolumn cellvalidating

25-Dec-2019 20:08

Further, let’s say that you’d like to know as soon as the user has made a change to their selection.You might want to handle this for a number of reasons: to enable a save button, to change the appearance of selected items, to display a pop-up window, or to check for consistency against other choices.

What currently happens is that when I click the cell, it drops down and highlights the active value at the top.

For an example that implements virtual mode with a cell-level commit scope, see the Virtual Mode property reference topic.

The following events occur only when the Virtual Mode property is set to Used by the control to commit user input for a cell to the data cache.

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.

This scenario is particularly useful when working with large amounts of data over a slow network connection or with client machines that have a limited amount of RAM or storage space.

What currently happens is that when I click the cell, it drops down and highlights the active value at the top.

For an example that implements virtual mode with a cell-level commit scope, see the Virtual Mode property reference topic.

The following events occur only when the Virtual Mode property is set to Used by the control to commit user input for a cell to the data cache.

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.

This scenario is particularly useful when working with large amounts of data over a slow network connection or with client machines that have a limited amount of RAM or storage space.

Call the Update Row Height Info method when changing the cached row height information outside of a Row Height Info Pushed event handler to ensure that the current value is used in the display of the control.