CAD二次开发可以采用写扩展DLL的方式实现。该DLL的函数可以被CAD调用。
但是调用前,必须用命令netload 将该dll加载到CAD。
其实可以修改注册表,当CAD软件启动后,自动加载扩展DLL。
为此,我写了一个函数,很方便的修改注册表,达到自动加载dll的目的!
该函数支持各个版本cad。
string[] GetRegSubDir(RegistryKey autoCad, string startFlag)
{
string[] subKey = autoCad.GetSubKeyNames();
return subKey.Where(o => o.StartsWith(startFlag)).ToArray();
}
1 //strCadRegKey = "HLD_CAD_Import"; //唯一注册标识 可用公司名称和程序名称
//strDll dll文件路径
private bool WriteRegistryKey(string strDll,string strCadRegKey)
{
try
{
RegistryKey localMachine = Registry.LocalMachine;
RegistryKey SOFTWARE = localMachine.OpenSubKey("SOFTWARE", true);
RegistryKey Autodesk = SOFTWARE.OpenSubKey("Autodesk", true);
RegistryKey AutoCAD = Autodesk.OpenSubKey("AutoCAD", true); int result = ;
foreach (string subDir in GetRegSubDir(AutoCAD, "R"))
{
try
{
RegistryKey CadVersion = AutoCAD.OpenSubKey(subDir, true); string AcadVersion = GetRegSubDir(CadVersion, "ACAD-").FirstOrDefault();
RegistryKey ACAD = CadVersion.OpenSubKey(AcadVersion, true); RegistryKey Applications = ACAD.OpenSubKey("Applications", true); //删除旧有记录
try
{
Applications.DeleteSubKeyTree(strCadRegKey);
}
catch (Exception ex)
{ } RegistryKey MXCAD = Applications.CreateSubKey(strCadRegKey);
MXCAD.SetValue("LOADCTRLS", 0x02);
MXCAD.SetValue("LOADER", strDll);
MXCAD.SetValue("MANAGED", 0x01);
result++;
}
catch (Exception ex)
{
if (showMessage)
System.Windows.Forms.MessageBox.Show(string.Format("注册时出错!{0}", ex.Message));
}
} if (result > && showMessage)
System.Windows.Forms.MessageBox.Show(string.Format("注册成功!"));
return true;
}
catch (Exception ex)
{ return false;
}
}