TextPointer.CompareTo Method
Performs an ordinal comparison between the positions specified by the current TextPointer and a second specified TextPointer.
Namespace: System.Windows.Documents
Assembly: System.Windows (in System.Windows.dll)
Parameters
- position
- Type: System.Windows.Documents.TextPointer
A TextPointer that specifies a position to compare to the current position.
Return Value
Type: System.Int32-1 if the current TextPointer precedes position; 0 if the locations are the same; +1 if the current TextPointer follows positions.
| Exception | Condition |
|---|---|
| ArgumentException | position specifies a position from a different RichTextBox associated with the current position. |
The following code uses the CompareTo method to find out if the RichTextBox is empty. This code example is part of a larger example used in the TextPointer class.
//This method returns true if the RichTextBox is empty. public bool isRichTextBoxEmpty() { TextPointer startPointer = MyRTB1.ContentStart.GetNextInsertionPosition(LogicalDirection.Forward); TextPointer endPointer = MyRTB1.ContentEnd.GetNextInsertionPosition(LogicalDirection.Backward); if (startPointer.CompareTo(endPointer) == 0) return true; else return false; }
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.