Skip to main content

DevExpress v24.2 Update — Your Feedback Matters

Our What's New in v24.2 webpage includes product-specific surveys. Your response to our survey questions will help us measure product satisfaction for features released in this major update and help us refine our plans for our next major release.

Take the survey Not interested

SubDocument.BeginUpdate() Method

Locks the SubDocument object. Prevents visual updates until the EndUpdate method calls.

Namespace: DevExpress.XtraRichEdit.API.Native

Assembly: DevExpress.RichEdit.v24.2.Core.dll

NuGet Package: DevExpress.RichEdit.Core

#Declaration

void BeginUpdate()

#Remarks

Use the BeginUpdate and EndUpdate methods to avoid flickering during batch modifications to the SubDocument‘s settings. After calling BeginUpdate, any changes to the SubDocument‘s settings do not cause immediate repainting. This allows multiple changes without affecting performance or causing screen flickering. Once you finish all desired changes, call EndUpdate.

The BeginUpdate and EndUpdate methods use an internal counter to manage updates. The counter starts at 0. When the counter is above 0, the system blocks visual updates. When the counter returns to 0, the system allows updates. The BeginUpdate method increments the counter. The EndUpdate method decrements the counter. If the counter reaches 0, an immediate visual update occurs.

Always pair each BeginUpdate call with an EndUpdate call. To ensure EndUpdate runs even if an exception occurs, use the try...finally statement.

The following code snippets (auto-collected from DevExpress Examples) contain references to the BeginUpdate() method.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

See Also