存储墨迹
Save 方法支持将墨迹存储为墨迹序列化格式 (ISF)。 StrokeCollection 类的构造函数为读取墨迹数据提供支持。
墨迹存储和检索
本部分讨论如何在 WPF 平台中存储和检索墨迹。
以下示例实现一个按钮单击事件处理程序,它向用户显示“文件保存”对话框,并从 InkCanvas 输出墨迹保存到文件中。
private void buttonSaveAsClick(object sender, RoutedEventArgs e)
{
SaveFileDialog saveFileDialog1 = new SaveFileDialog();
saveFileDialog1.Filter = "isf files (*.isf)|*.isf";
if (saveFileDialog1.ShowDialog() == true)
{
FileStream fs = new FileStream(saveFileDialog1.FileName,
FileMode.Create);
theInkCanvas.Strokes.Save(fs);
fs.Close();
}
}
Private Sub buttonSaveAsClick(ByVal sender As Object, ByVal e As RoutedEventArgs)
Dim saveFileDialog1 As New SaveFileDialog()
saveFileDialog1.Filter = "isf files (*.isf)|*.isf"
If saveFileDialog1.ShowDialog() Then
Dim fs As New FileStream(saveFileDialog1.FileName, FileMode.Create)
theInkCanvas.Strokes.Save(fs)
fs.Close()
End If
End Sub
以下示例实现一个按钮单击事件处理程序,它向用户显示“文件打开”对话框,并读取来自文件的墨迹到 InkCanvas 元素中。
private void buttonLoadClick(object sender, RoutedEventArgs e)
{
OpenFileDialog openFileDialog1 = new OpenFileDialog();
openFileDialog1.Filter = "isf files (*.isf)|*.isf";
if (openFileDialog1.ShowDialog() == true)
{
FileStream fs = new FileStream(openFileDialog1.FileName,
FileMode.Open);
theInkCanvas.Strokes = new StrokeCollection(fs);
fs.Close();
}
}
Private Sub buttonLoadClick(ByVal sender As Object, ByVal e As RoutedEventArgs)
Dim openFileDialog1 As New OpenFileDialog()
openFileDialog1.Filter = "isf files (*.isf)|*.isf"
If openFileDialog1.ShowDialog() Then
Dim fs As New FileStream(openFileDialog1.FileName, FileMode.Open)
theInkCanvas.Strokes = New StrokeCollection(fs)
fs.Close()
End If
End Sub