以下示例演示通过 Blocks 属性可以对 FlowDocument 执行的部分较常见的操作。
示例
下面的示例创建一个新的 FlowDocument，然后向 FlowDocument 中追加新的 Paragraph 元素。
Dim flowDoc As New FlowDocument(New Paragraph(New Run("A bit of text content...")))
flowDoc.Blocks.Add(New Paragraph(New Run("Text to append...")))
FlowDocument flowDoc = new FlowDocument(new Paragraph(new Run("A bit of text content...")));
flowDoc.Blocks.Add(new Paragraph(new Run("Text to append...")));
下面的示例创建一个新的 Paragraph 元素并将其插入到 FlowDocument 的开始位置。
Dim p As New Paragraph(New Run("Text to insert..."))
flowDoc.Blocks.InsertBefore(flowDoc.Blocks.FirstBlock, p)
Paragraph p = new Paragraph(new Run("Text to insert..."));
flowDoc.Blocks.InsertBefore(flowDoc.Blocks.FirstBlock, p);
下面的示例获取包含在 FlowDocument 中的顶级 Block 元素的数目。
Dim countTopLevelBlocks As Integer = flowDoc.Blocks.Count
int countTopLevelBlocks = flowDoc.Blocks.Count;
下面的示例删除 FlowDocument 中的最后一个 Block 元素。
flowDoc.Blocks.Remove(flowDoc.Blocks.LastBlock)
flowDoc.Blocks.Remove(flowDoc.Blocks.LastBlock);
下面的示例从 FlowDocument 中清除所有内容（Block 元素）。
flowDoc.Blocks.Clear()
flowDoc.Blocks.Clear();