Question

我试图用一些公式来编写一个基本的绘图应用程序，这需要我保持我的点精确。一切都运作良好，但有一部分将允许我继续这个计划。我需要使用Control.GetChildAtPoint方法查看该行的某个点是否有某个对象，但我的所有点都在pointF（float）中。这是一段应该有意义的代码。

    if (poscount > 15) {
            //to see if point is close to an object
            if (this.GetChildAtPoint(point2) != null) {
                label1.Text = "I found an object";                                      
            } else label1.Text = " no object found";

        }

抱歉愚蠢的例子，但在point2 (which is a pointF ) it gives an error that I cant convert from a float to System.Drawing.Point . I cant find a way to convert it and keep the accuracy. Is there a way I can use GetChildAtPoint with a float`？

Answer 1

参数可以转换如下。

if (poscount > 15)
{
    // to see if point is close to an object
    Point iPoint = new Point((int)point2.X, (int)point2.Y);
    if (this.GetChildAtPoint(iPoint) != null)
    {
        label1.Text = "I found an object";                                      
    }
    else
    {
        label1.Text = " no object found";
    }
}

如何在PointF中使用GetChildAtPoint

1 个答案: