求教DllImport和DllImportAttribute用法上的区别 一样的东西DllImportAttribute是这个特性的类[DllImport]是这特性的描述。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 DllImport = DllImportAttribute,Attribute在使用时可以省略不写 我觉得DllImport是关键字,而引入DLL需要写明其它属性,例如如下所示,DllImport后面括号中间都是DllImportAttribute[DllImport("KERNEL32.DLL", EntryPoint="MoveFileW", SetLastError=true,CharSet=CharSet.Unicode, ExactSpelling=true,CallingConvention=CallingConvention.StdCall)]public static extern bool MoveFile(String src, String dst); 以下是我在书上看见的一段代码,如果两者相同,为何作者要在同一段代码中应用两种不同的编程风格?都用DllImport不是简单多呢?[DllImport("gdi32.dll")] private static extern bool BitBlt( IntPtr hdcDest, // hanlde to destination Dc (device context) int nXDest, // x-coord of destination upper-left corner int nYDest, // y-coord of destination upper-left corner int nWidth, // width of destination rectangle int nHeight, // height of destination rectangle HDC hdcSrc, // handle to source DC int nXSrc, // x-coordinate of source upper-left corner int nYSrc, // y-coordinate of source upper-left corner System.Int32 dwRop // raster operation code ); [DllImport("gdi32.dll")] private static extern IntPtr CreateDC( String DriverName, // driver name String DeviceName, // device name String Output, // not used; should be NULL IntPtr lpInitData // optional printer data ); [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")] private static extern bool DeleteDC( IntPtr dc ); [System.Runtime.InteropServices.DllImportAttribute("user32.dll")] private static extern unsafe bool ClientToScreen( IntPtr hWnd, // handle to window Point* lpPoint // screen coordinates ); 为什么调用WebService提示没有oracle的客户端 ¤有做过语音传输的朋友给点建议¤ 用C#写为视频添加字幕的程序 socket 通信问题!!!!!!!!! 调查一下,大家在使用VS2003还是2005? 高手帮忙,c#弄的一个考试系统,从数据库里查出试题,怎么切换上一题和下一题???? 请各位大侠帮帮忙!小弟谢过了! access数据库的分页显示的C#代码 前辈们求解:单击按钮查找一条记录,datagridview就添加一行,而且以前查找的记录还显示 获取图像坐标问题 怎么给javascript的函数传C#的参数? 程序集和装配件是一个概念吗?
[DllImport("KERNEL32.DLL", EntryPoint="MoveFileW", SetLastError=true,
CharSet=CharSet.Unicode, ExactSpelling=true,
CallingConvention=CallingConvention.StdCall)]
public static extern bool MoveFile(String src, String dst);
[DllImport("gdi32.dll")]
private static extern bool BitBlt(
IntPtr hdcDest, // hanlde to destination Dc (device context)
int nXDest, // x-coord of destination upper-left corner
int nYDest, // y-coord of destination upper-left corner
int nWidth, // width of destination rectangle
int nHeight, // height of destination rectangle
HDC hdcSrc, // handle to source DC
int nXSrc, // x-coordinate of source upper-left corner
int nYSrc, // y-coordinate of source upper-left corner
System.Int32 dwRop // raster operation code
); [DllImport("gdi32.dll")]
private static extern IntPtr CreateDC(
String DriverName, // driver name
String DeviceName, // device name
String Output, // not used; should be NULL
IntPtr lpInitData // optional printer data
); [System.Runtime.InteropServices.DllImportAttribute("gdi32.dll")]
private static extern bool DeleteDC(
IntPtr dc
); [System.Runtime.InteropServices.DllImportAttribute("user32.dll")]
private static extern unsafe bool ClientToScreen(
IntPtr hWnd, // handle to window
Point* lpPoint // screen coordinates
);