本文整理汇总了C#中System.Windows.Documents.TextPointer类的典型用法代码示例。如果您正苦于以下问题：C# TextPointer类的具体用法？C# TextPointer怎么用？C# TextPointer使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
TextPointer类属于System.Windows.Documents命名空间，在下文中一共展示了TextPointer类的2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C#代码示例。
示例1: FindFirstRunInTextContainer
// This method returns the position just inside of the first text Run (if any) in a
// specified text container.
TextPointer FindFirstRunInTextContainer(DependencyObject container)
{
TextPointer position = null;
if (container != null){
if (container is FlowDocument)
position = ((FlowDocument)container).ContentStart;
else if (container is TextBlock)
position = ((TextBlock)container).ContentStart;
else
return position;
}
// Traverse content in forward direction until the position is immediately after the opening
// tag of a Run element, or the end of content is encountered.
while (position != null)
{
// Is the current position just after an opening element tag?
if (position.GetPointerContext(LogicalDirection.Backward) == TextPointerContext.ElementStart)
{
// If so, is the tag a Run?
if (position.Parent is Run)
break;
}
// Not what we're looking for; on to the next position.
position = position.GetNextContextPosition(LogicalDirection.Forward);
}
// This will be either null if no Run is found, or a position just inside of the first Run element in the
// specifed text container. Because position is formed from ContentStart, it will have a logical direction
// of Backward.
return position;
}示例2: FindWordFromPosition
// This method will search for a specified word (string) starting at a specified position.
TextPointer FindWordFromPosition(TextPointer position, string word)
{
while (position != null)
{
if (position.GetPointerContext(LogicalDirection.Forward) == TextPointerContext.Text)
{
string textRun = position.GetTextInRun(LogicalDirection.Forward);
// Find the starting index of any substring that matches "word".
int indexInRun = textRun.IndexOf(word);
if (indexInRun >= 0)
{
position = position.GetPositionAtOffset(indexInRun);
break;
}
}
else
{
position = position.GetNextContextPosition(LogicalDirection.Forward);
}
}
// position will be null if "word" is not found.
return position;
}