本文整理汇总了VB.NET中System.Windows.Documents.TextRange.IsEmpty属性的典型用法代码示例。如果您正苦于以下问题：VB.NET TextRange.IsEmpty属性的具体用法？VB.NET TextRange.IsEmpty怎么用？VB.NET TextRange.IsEmpty使用的例子？那么, 这里精选的属性代码示例或许可以为您提供帮助。您也可以进一步了解该属性所在类System.Windows.Documents.TextRange的用法示例。
在下文中一共展示了TextRange.IsEmpty属性的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的VB.NET代码示例。
示例1: BoldFormatStream
' This method accepts an input stream and a corresponding data format. The method
' will attempt to load the input stream into a TextRange selection, apply Bold formatting
' to the selection, save the reformatted selection to an alternat stream, and return
' the reformatted stream.
Private Function BoldFormatStream(ByVal inputStream As Stream, ByVal dataFormat As String) As Stream
' A text container to read the stream into.
Dim workDoc As New FlowDocument()
Dim selection As New TextRange(workDoc.ContentStart, workDoc.ContentEnd)
Dim outputStream As Stream = New MemoryStream()
Try
' Check for a valid data format, and then attempt to load the input stream
' into the current selection. Note that CanLoad ONLY checks whether dataFormat
' is a currently supported data format for loading a TextRange. It does not
' verify that the stream actually contains the specified format. An exception
' may be raised when there is a mismatch between the specified data format and
' the data in the stream.
If selection.CanLoad(dataFormat) Then
selection.Load(inputStream, dataFormat)
End If
Catch e As Exception ' Load failure return a null stream.
Return outputStream
End Try
' Apply Bold formatting to the selection, if it is not empty.
If Not selection.IsEmpty Then
selection.ApplyPropertyValue(TextElement.FontWeightProperty, FontWeights.Bold)
End If
' Save the formatted selection to a stream, and return the stream.
If selection.CanSave(dataFormat) Then
selection.Save(outputStream, dataFormat)
End If
Return outputStream
End Function