知识点1：描线
吧totalWidth*totalHeight的carrier分成singleWidth*singleHeight的lineColor颜色的矩形框，框为dashWidth宽，间隙dashSpace
/// <summary>
/// 绘?制?网ª?格?边À?线?
/// </summary>
private void SetGridLines(Canvas carrier, double totalWidth, double totalHeight, double singleWidth, double singleHeight,Color lineColor, double dashWidth, double dashSpace) {
//欲与之?，ê?必À?先¨¨舍¦¨¢之?
carrier.Children.Clear();
int sectionXNum = (int)(totalWidth / singleWidth);
int sectionYNum = (int)(totalHeight / singleHeight);
for (int x = 1; x <= sectionXNum; x++) {//竖º¨²线?
Line line = new Line() {
X1 = x * singleWidth,
X2 = x * singleWidth,
Y1 = 0,
Y2 = totalHeight,
Stroke = new SolidColorBrush(lineColor),
StrokeDashArray = new DoubleCollection() { dashWidth, dashSpace },
};
carrier.Children.Add(line);
}
for (int y = 1; y <= sectionYNum; y++) {//横¨¢线?
Line line = new Line() {
X1 = 0,
X2 = totalWidth,
Y1 = y * singleHeight,
Y2 = y * singleHeight,
Stroke = new SolidColorBrush(lineColor),
StrokeDashArray = new DoubleCollection() { dashWidth, dashSpace },
};
carrier.Children.Add(line);
}
}
知识点2：自定义双击事件
public DateTime _lastClick = DateTime.Now;
private bool _firstClickDone =
false;
private void MainPage_MouseLeftButtonDown(object sender, MouseButtonEventArgs
e)
{
TimeSpan
span = DateTime.Now - _lastClick;
if (span.TotalMilliseconds < 300 && _firstClickDone == true)
{ //两次点击事件不超过0.3s(当然你也可以自己尝试一般双击间隔时间)+前一次是单击（避免3击）
//双击触发
//双击代码请在这里编写
_firstClickDone = false;
}
else
{ //第一次点击
_firstClickDone = true;
_lastClick = DateTime.Now;
}
所谓双击事件就是很快的两次单机，
双击=两次单击时间间隔少于300微秒+前一次是单击
知识点3：自定义长按左键事件
private void ObstructionViewer_PreviewMouseMove(object sender, MouseEventArgs e) {
if (e.LeftButton == MouseButtonState.Pressed) {
//code }
}
长按左键事件= e.LeftButton == MouseButtonState.Pressed
简单吧，看了感觉很简单啊，但是不知道就很难喽。
知识点4：大图分解为指定尺寸的小图
for (int x = 0; x < sectionXNum; x++) {
for (int y = 0; y < sectionYNum; y++) {
CroppedBitmap croppedBitmap = new CroppedBitmap(mapSource, new Int32Rect(x * (int)SectionWidth.Value, y * (int)SectionHeight.Value, (int)SectionWidth.Value, (int)SectionHeight.Value));
System.IO.FileStream fileStream = new System.IO.FileStream(string.Format(@"{0}/{1}_{2}.jpg", outputSection.SelectedPath, x, y), System.IO.FileMode.Create);
JpegBitmapEncoder encoder = new JpegBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(croppedBitmap));
encoder.Save(fileStream);
fileStream.Close();
}
}
- 从mapSource得到指定位置指定大小的BitmapSource源；
- 创建个事件流，流位置即保存地址设定好；
- Jpg转码转换；
- 保存
就不详细说了，自己看代码吧，就按这个流程来就行了。