已不再支援此瀏覽器。
請升級至 Microsoft Edge，以利用最新功能、安全性更新和技術支援。
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Gets the number of characters in the text span.
public: property int Length { int get(); };
public int Length { get; }
member this.Length : int
Public ReadOnly Property Length As Integer
An Int32 value that represents the length of the text span.
.NET
