在WPF中绘制大量数量的线段时,绘制很慢,而且很耗CPU的资源。绘制到几百条线段时,就会明显无法交互操作。
通过查询资料,我们找到一个方法可以解决:使用StreamGeometry在内存中绘制,然后再Render到WPF的控件上。
实现如下:
using (var geometryContext = _cueGeometry.Open())
using (var perContext = _perGeometry.Open())
using (var _volContext = _volGeometry.Open())
{
for (int i = 0; i < TickLineValue.drawTickData.Count() - 1; i++)
{
TickLineValue.drawTickData[i].picTopY = topY;
TickLineValue.drawTickData[i].PriceMax = TickLineValue.tickMaxValue;
TickLineValue.drawTickData[i].PriceMin = TickLineValue.tickMinValue;
TickLineValue.drawTickData[i].ScreenTickHeight = TickLineValue.tickHeight;
TickLineValue.drawTickData[i].VolMax = TickLineValue.volMaxValue;
TickLineValue.drawTickData[i].picVolTopY = TickLineValue.lineObject.GetYValue() + TickLineValue.perPicTxtHeight;
TickLineValue.drawTickData[i].ScreenVolHeight = TickLineValue.volHeight;
//绘制图形的
x = TickLineValue.picLeftWidth + i * TickLineValue.picWidth;
&nb