passing wstring, string and reference to enum variable from C# to C++(unmanaged DLL) -

-

i have c++ dll in following functions exported.

double getdouble(std::wstring filename, std::string id, status &stcode);  int getint(std::wstring filename, std::string id, status &stcode);  float getfloat(std::wstring filename, std::string id, status &stcode);  string getstring(std::wstring filename, std::string id, status &stcode);  int* getintarray(std::wstring filename, std::string id, status &stcode);  float* getfloatarray(std::wstring filename, std::string id, status &stcode);  string* getstringarray(std::wstring filename, std::string id, status &stcode);

where status of enum type...

now want use dll in c#.net app... can tell me how delclare respected methods in c# , can make call methods.... in advance... 

    [dllimport("external.dll", setlasterror = true, callingconvention = callingconvention.cdecl)]     public static extern mbstatus queue_accept(         int reader,         [marshalas(unmanagedtype.lpstr)] string status);

lookup parameters dllimport attribute. depending on dll might need adjusted!

side note: wrap external dll in interface , code layer decouple tests , load dependency injection. don't change naming conventions. 

public interface iexternaldllinterop {     mb_status queue_accept(int reader, string status); }  public class ambinterop : iambinterop {     public mbstatus queue_accept(int reader, string status)     {         return staticambinterop.mb_queue_accept(reader, message, status);     } }

Comments

Post a Comment

Popular posts from this blog

c# - SVN Error : "svnadmin: E205000: Too many arguments" -

-
i trying reposotries using c# code process svncommand = null; var psi = new processstartinfo("svnadmin"); psi.redirectstandardoutput = true; psi.redirectstandarderror = true; psi.useshellexecute = false; psi.arguments= @"dump c:\repositories\myrepo > c:\temp\myrepodumpfile.dump"; using (svncommand = process.start(psi)) { var myoutput = svncommand.standardoutput; var myerror = svncommand.standarderror; debug.write("output :" + environment.newline + environment.newline + myoutput.readtoend() + environment.newline + "error :" + environment.newline + environment.newline + myerror.readtoend()); svncommand.close(); } when use dump command commandline svnadmin dump c:\repositories\myrepo > c:\temp\myrepodumpfile.dump it works fine when try ...
Read more

c# - Copy ObservableCollection to another ObservableCollection -

-
how copy observablecollection item observablecollection without reference of first collection? here observablecollection item value changes affecting both collections. code private observablecollection<ratemodel> _allmetalrate = new observablecollection<ratemodel>(); private observablecollection<ratemodel> _metalrateondate = new observablecollection<ratemodel>(); public observablecollection<ratemodel> allmetalrate { { return this._allmetalrate; } set { this._allmetalrate = value; notifypropertychanged("metalrate"); } } public observablecollection<ratemodel> metalrateondate { { return this._metalrateondate; } set { this._metalrateondate = value; notifypropertychanged("metalrateondate"); } } foreach (var item in metalrateondate) allmetalrate.add(item); what causing , how can solve it? you need clone object referenced item before it's a...
Read more

All overlapping substrings matching a java regex -

-
is there api method returns (possibly overlapping) substrings match regular expression? for example, have text string: string t = 04/31 412-555-1235; , , have pattern: pattern p = new pattern("\\d\\d+"); matches strings of 2 or more characters. the matches are: 04, 31, 412, 555, 1235. how overlapping matches? i want code return: 04, 31, 41, 412, 12, 55, 555, 55, 12, 123, 1235, 23, 235, 35. theoretically should possible -- there obvious o(n^2) algorithm enumerates , checks substrings against pattern. edit rather enumerating substrings, safer use region(int start, int end) method in matcher . checking pattern against separate, extracted substring might change result of match (e.g. if there non-capturing group or word boundary check @ start/end of pattern). edit 2 actually, it's unclear whether region() expect zero-width matches. specification vague, , experiments yield disappointing results. for example: string line = "xx90xx"; strin...
Read more