GetDeviceCaps技术
GetDeviceCaps技术
提问于 2009-09-17 06:41:08
我有一个控件，我想在窗体和打印时以不同的方式绘制它。我是这样做的：
private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
Rectangle rect = myControl.ClientRectangle;
myControl.Render(e.Graphics, rect);
e.HasMorePages = false;
}在Render函数中
public void Render(Graphics g, Rectangle rect) {
DeviceCapTechnology dct = (DeviceCapTechnology)GetDeviceCaps(hDC, (int)DeviceCap.TECHNOLOGY);
if((dct & DeviceCapTechnoloy.DT_RASPRINTER) == DeviceCapTechnoloy.DT_RASPRINTER) {
//logic for print to printer
} else {
//normal logic
}
}
public enum DeviceCapTechnology
{
DT_PLOTTER = 0, //Vector plotter
DT_RASDISPLAY = 2, //Raster display
DT_RASPRINTER = 4, //Raster printer
DT_RASCAMERA = 6, //Raster camera
DT_CHARSTREAM = 8, //Character stream
DT_METAFILE = 10, //Metafile
DT_DISPFILE = 12 //Display file
}但是当PrintDocumentDialog显示时，测试的结果总是DT_RASDISPLAY，而不是我期望的DT_RASPRINTER。
那么，什么才是正确的方法呢？
谢谢
回答 1
Stack Overflow用户
发布于 2010-01-27 03:51:32
您的DeviceCapTechnology枚举错误
/* Device Technologies */
#define DT_PLOTTER 0 /* Vector plotter */
#define DT_RASDISPLAY 1 /* Raster display */
#define DT_RASPRINTER 2 /* Raster printer */
#define DT_RASCAMERA 3 /* Raster camera */
#define DT_CHARSTREAM 4 /* Character-stream, PLP */
#define DT_METAFILE 5 /* Metafile, VDM */
#define DT_DISPFILE 6 /* Display-file */页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/1437073
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