C# System.Drawing Graphic 未实现异常

Question

下面的代码可以编译，但是当调用该方法时，我得到 System.NotImplementedException: Not Implemented. 我没有使用自定义类。

private void miterTopLeft(Image img, Graphics gfx)
{
    int maxSize = Math.Max(img.Height, img.Width);
    Point[] points = new Point[4];
    points[0] = new Point(0, 0);
    points[1] = new Point(maxSize, maxSize);
    points[2] = new Point(0, maxSize);
    points[3] = new Point(0, 0);
    gfx.DrawImage(img, points);
}

为什么 .NET 类中会出现此错误？有解决办法吗？

堆栈跟踪：

[NotImplementedException: Not implemented.]
System.Drawing.Graphics.CheckErrorStatus(Int32 status) +1154064
System.Drawing.Graphics.DrawImage(Image image, PointF[] destPoints) +150
GetMergeImage.miterTopLeft(Image img, Graphics gfx) in d:\.NET Projects\publish2\GetMergeImage.ashx:51
GetMergeImage.drawLeftBorderRectangeRug(Double ppi, Boolean hasCorner, Graphics gfx, DesignVO border, Image img, Double vBorderStartY, Double vBorderStartX, Double vBorderNumRepeat) in d:\.NET Projects\publish2\GetMergeImage.ashx:243
GetMergeImage.drawRectangularRug(Int32 displayWidth, Int32 displayHeight, Int32 width, Int32 height, MergeVO merge) in d:\.NET Projects\publish2\GetMergeImage.ashx:140
GetMergeImage.ProcessRequest(HttpContext context) in d:\.NET Projects\publish2\GetMergeImage.ashx:40
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +100
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +75

Answer 1

根据文档，您只能通过构成平行四边形的三个点。

如果您想要一个三角形，则需要剪辑绘图< /a>