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Hanging When Calling TextPointer.GetCharacterRect(LogicalDirection direction)

原文 2019-09-18 21:46:41 8 0 c#/ .net/ wpf/ richtextbox

When I call TextPointer.GetCharacterRect(LogicalDirection direction) my WPF application sometimes hangs for 3 to 10 minutes or more.

The TextPointer is valid. The RichTextBox text is long - just under 3 million characters, but I've ran this code on longer text and not had this issue.

Some TextPointers return the from the call to GetCharacterRect almost immediately and then others take minutes - I can't find any pattern except it is always the same TextPointers.

Any suggestions?

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