wpf内容打印文本框

using System;
using System.Printing;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;

namespace WpfPrintExample
{
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        private void PrintButton_Click(object sender, RoutedEventArgs e)
        {
            PrintDialog printDialog = new PrintDialog();
            if (printDialog.ShowDialog() == true)
            {
                PrintDocument printDocument = new PrintDocument();
                printDocument.PrintPage += (s, args) =>
                {
                    TextRange textRange = new TextRange(
                        TextBox.Document.ContentStart,
                        TextBox.Document.ContentEnd);
                    args.PageVisual = ((IDocumentPaginatorSource)TextBox.Document).DocumentPaginator;
                    args.HasMorePages = false;
                };
                printDialog.PrintDocument(printDocument.DocumentPaginator, "Print Document");
            }
        }
    }
}