Formatting.BeginUpdate() Method
Locks the Formatting object. Prevents visual updates until the EndUpdate method calls.
Namespace: DevExpress.Spreadsheet
Assembly: DevExpress.Spreadsheet.v24.1.Core.dll
NuGet Package: DevExpress.Spreadsheet.Core
Declaration
Remarks
Use the BeginUpdate and EndUpdate methods to avoid flickering during batch modifications to the Formatting‘s settings. After calling BeginUpdate, any changes to the Formatting‘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.
Example
Use a style‘s index or name to obtain it from the Workbook.Styles collection.
To change the style’s format attributes, modify the Style object’s properties within the
Formatting.BeginUpdate- Formatting.EndUpdate method calls.
// Access a style you want to modify.
Style customStyle = workbook.Styles["Custom Style"];
// Change the style's format characteristics.
customStyle.BeginUpdate();
try {
customStyle.Fill.BackgroundColor = Color.Gold;
// ...
} finally {
customStyle.EndUpdate();
}
Related GitHub Examples
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the BeginUpdate() method.
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