在如今这个时代，对这个功能的需求量可能已经很少了，但是这也不妨碍我们或多或少的会碰到一些稀奇古怪的需求，多接触一些总归是没错的。
本篇主要是用到了Microsoft.Ink来实现一个手写输入，也就是类似于手机输入法中的手写功能。
实现功能：
用鼠标或者手指在屏幕上写字并识别输入到文本框
开发环境：
开发工具： Visual Studio 2013
.NET Framework版本：4.5
实现代码：
InkCollector ink;
RecognizerContext recogn;
public inputFrm()
{
InitializeComponent();
Control.ControlCollection btnList = panel3.Controls;
foreach (Control c in btnList)
{
(c as Button).Click = (s, e) =>
{
if (textBox1.Text.Length > 0)
{
int intStart = textBox1.SelectionStart;
textBox1.Text = textBox1.Text.Remove(intStart - 1, 1);
textBox1.Text = textBox1.Text.Insert(intStart - 1, (s as Button).Text);
textBox1.SelectionStart = intStart;
}
};
}
}
private void inputFrm_Load(object sender, EventArgs e)
{
//创建笔画采集器
ink = new InkCollector(picText.Handle);
ink.Enabled = true;
ink.Stroke = new InkCollectorStrokeEventHandler((s, e1) =>
{
recogn.StopBackgroundRecognition();
recogn.Strokes.Add(e1.Stroke);
recogn.BackgroundRecognizeWithAlternates(0);
});
//创建识别器
Recognizers recs = new Recognizers();
Recognizer rec = recs.GetDefaultRecognizer();
recogn = rec.CreateRecognizerContext();
recogn.RecognitionFlags = RecognitionModes.WordMode;
recogn.Strokes = ink.Ink.Strokes;
recogn.RecognitionWithAlternates = new RecognizerContextRecognitionWithAlternatesEventHandler((s, e1) =>
{
string result = "";
RecognitionAlternates alts;
if (e1.RecognitionStatus == RecognitionStatus.NoError)
{
alts = e1.Result.GetAlternatesFromSelection();
foreach (RecognitionAlternate alt in alts)
{
result = alt.ToString() " ";
}
}
result = result.Trim();
Control.CheckForIllegalCrossThreadCalls = false;
string[] arr = result.Split(' ');
for (int i = 0; i < arr.Length; i )
{
string str = "btnSelect_" (i 1);
Control btn = panel3.Controls.Find(str, false).First();
btn.Text = arr[i];
}
Control.CheckForIllegalCrossThreadCalls = true;
});
}
private void picText_MouseUp(object sender, MouseEventArgs e)
{
timer1.Enabled = true;
}
private void picText_MouseDown(object sender, MouseEventArgs e)
{
timer1.Enabled = false;
}
private void timer1_Tick(object sender, EventArgs e)
{
Write();
if (!ink.CollectingInk)
{
Strokes strokesToDelete = ink.Ink.Strokes;
recogn.StopBackgroundRecognition();
ink.Ink.DeleteStrokes(strokesToDelete);
recogn.Strokes = ink.Ink.Strokes;
ink.Ink.DeleteStrokes();
picText.Refresh();
}
timer1.Stop();
}
private void Write()
{
List<Point> lstPoints = new List<Point>();
foreach (var stroke in ink.Ink.Strokes)
{
lstPoints.AddRange(stroke.GetPoints());
}
ink.Ink.DeleteStrokes();
Stroke sk = ink.Ink.CreateStroke(lstPoints.ToArray());
recogn.Strokes.Add(sk);
textBox1.SelectedText = ink.Ink.Strokes.ToString();
}
private void btnDel_Click(object sender, EventArgs e)
{
if (!string.IsNullOrEmpty(textBox1.Text))
textBox1.Text = textBox1.Text.Substring(0, textBox1.Text.Length - 1);
}
private void btnClear_Click(object sender, EventArgs e)
{
if (!ink.CollectingInk)
{
Strokes strokesToDelete = ink.Ink.Strokes;
recogn.StopBackgroundRecognition();
ink.Ink.DeleteStrokes(strokesToDelete);
recogn.Strokes = ink.Ink.Strokes;
ink.Ink.DeleteStrokes();
picText.Refresh();
textBox1.Clear();
}
}
实现效果：
最后附上一个关于Microsoft.Ink的API说明文档：https://docs.microsoft.com/en-us/previous-versions/dotnet/netframework-3.5/ms581553(v=vs.90)，以方便大家更加详细的了解以及使用。
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