Graphics类画图

PageUnit属性。

public enum GraphicsUnit
    {
        // Summary:
        //     Specifies the world coordinate system unit as the unit of measure.
        World = 0,
        //
        // Summary:
        //     Specifies the unit of measure of the display device. Typically pixels for
        //     video displays, and 1/100 inch for printers.
        Display = 1,
        //
        // Summary:
        //     Specifies a device pixel as the unit of measure.
        Pixel = 2,
        //
        // Summary:
        //     Specifies a printer's point (1/72 inch) as the unit of measure.
        Point = 3,
        //
        // Summary:
        //     Specifies the inch as the unit of measure.
        Inch = 4,
        //
        // Summary:
        //     Specifies the document unit (1/300 inch) as the unit of measure.
        Document = 5,
        //
        // Summary:
        //     Specifies the millimeter as the unit of measure.
        Millimeter = 6,
    }

 

 通过修改Graphics中PageUnit属性来定义何种长度来画。不单单只能画像素。

DrawLine函数用于画线。

DrawString函数用于画字。DrawString的时候可以规定在某一点开始画，或者在一个矩形区域内画。在矩形区域内可以通过StringFormat来设定水平和垂直的对齐方式。

 

搞了个打印税发票的模块，不得不鄙视天朝现在的税务制度。多让我做了那么多体力活。