实现RichTextBox内容自动滚动(WPF)

要实现RichTextBox内容的自滚动,首先要建立一个WPF Application 的工程,这里工程命名为FreeScroll。

1.应用软件:VS2010

2. 程序完成的功能:

      2.1  在richtextBox中载入Xaml文件

      2.2  设置滚动速度

      2.3  滚动

      2.4  鼠标双击停止滚动

3. 程序用到的控件:RichTextBox,Button,Label,TextBox

4.程序的实现

     4.1 控件布局           

 WPF中布局好的控件图如下:

     

     4.2  实现控件的响应函数

     

代码
namespace FreeScroll {
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window {
public MainWindow() {
InitializeComponent();
textBox1.Text
="";
}

//载入文件
private void Load_Click(object sender, RoutedEventArgs e) {
tmp
=0;
if (this.timer !=null) { timer.Tick -= new EventHandler(timer_Tick); }
OpenFileDialog openDialog
=new OpenFileDialog ();
if (openDialog.ShowDialog()==true )
{
using(FileStream fs=new FileStream (openDialog.FileName,FileMode.Open))
{
richTextBox1.Document
=XamlReader.Load(fs) as FlowDocument;
richTextBox1.Background
=richTextBox1.Document.Background;
}

}

}

//实现滚动
private void Scroll_Click(object sender, RoutedEventArgs e) {
if (timer!=null)
{
timer.Tick
-=new EventHandler (timer_Tick);
}
int timeInterval;
if (textBox1.Text != "") {
timeInterval
= System.Int32.Parse(textBox1.Text);

if (timeInterval >= 0) {
timer.Interval
= new TimeSpan(0, 0, 0, 0, timeInterval);

timer.Tick
+= new EventHandler(timer_Tick);
timer.Start();

}
else {
MessageBox.Show(
"请输入合适的时间间隔!");
}
}
else {
MessageBox.Show(
"请输入合适的时间间隔!");
}
}

void timer_Tick(object sender, EventArgs e) {
this.richTextBox1.ScrollToVerticalOffset(tmp++);
}

//鼠标双击停止滚动
private void richTextBox1_MouseDoubleClick(object sender, MouseButtonEventArgs e) {
timer.Tick
-=new EventHandler(timer_Tick);
}
double tmp = 0;
DispatcherTimer timer
= new DispatcherTimer();
}
}

posted @ 2010-12-03 14:29  绿茶叶  阅读(3649)  评论(0编辑  收藏  举报