VWD 2010 Express calls Win32 DLL
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From: Alan T on 28 Jun 2010 23:40 I am looking into using Visual WebDeveloper 2010 Express edition to develope a simple web application. - a button on web page - click on it - calls a Win32 DLL function by passing a string type parameter as output parameter - this output parameter will be a string, in format of yyyymmdd, eg. 20101231 - print out this output parameter on a label Any sample source code to help me get started?
From: Chris Dunaway on 29 Jun 2010 16:49 On Jun 28, 10:40 pm, "Alan T" <alan_NO_SPAM_pl...(a)yahoo.com.au> wrote: > I am looking into using Visual WebDeveloper 2010 Express edition to develope > a simple web application. > - a button on web page > - click on it > - calls a Win32 DLL function by passing a string type parameter as output > parameter > - this output parameter will be a string, in format of yyyymmdd, eg. > 20101231 > - print out this output parameter on a label > > Any sample source code to help me get started? Which function are you going to call? In any event, see http://www.pinvoke.net for examples of calling Win32 functions. Chris
From: Alan T on 29 Jun 2010 20:03 Sorry, I did not make myself clear. I have myself developed a Win32 DLL in Delphi (it does not matter anyway if in Delphi). eg. in Delphi DLL function TestDateString(_Name: String; out _FileName: String): Integer; stdcall; _DateString is the output parameter; Forget about the _Name parameter, I just want to test it. Now in VWD using C# behind code when I press a button: When I call TestDateString, it will generate a report and pass back the name of the report in format of 'yyyymmdd' or other format, it does not matter. I want to read the output parameter. I know it is very elementary in C# but I am pretty new to it. > I am looking into using Visual WebDeveloper 2010 Express edition to > develope > a simple web application. > - a button on web page > - click on it > - calls a Win32 DLL function by passing a string type parameter as output > parameter > - this output parameter will be a string, in format of yyyymmdd, eg. > 20101231 > - print out this output parameter on a label > > Any sample source code to help me get started? Which function are you going to call? In any event, see http://www.pinvoke.net for examples of calling Win32 functions. Chris
From: Jay Williams on 30 Jun 2010 15:13 "Alan T" <alan_NO_SPAM_pltse(a)yahoo.com.au> wrote in message news:emqMze%23FLHA.5856(a)TK2MSFTNGP02.phx.gbl... > Sorry, I did not make myself clear. > I have myself developed a Win32 DLL in Delphi (it does not matter anyway > if in Delphi). > eg. in Delphi DLL > function TestDateString(_Name: String; out _FileName: String): Integer; > stdcall; > > _DateString is the output parameter; > > Forget about the _Name parameter, I just want to test it. > > Now in VWD using C# behind code when I press a button: > When I call TestDateString, it will generate a report and pass back the > name of the report in format of 'yyyymmdd' or other format, it does not > matter. > > I want to read the output parameter. > > I know it is very elementary in C# but I am pretty new to it. Did you try passing the filename parameter with the out keyword in your c# code?
From: Alan T on 1 Jul 2010 19:50
> Did you try passing the filename parameter with the out keyword in your c# > code? Sorry as I am fairly new to ASP.NET as well as C#. eg. my dll file name called TestString.dll, the exported function: Name: TestDateString Parameter: _Name (type is String) out parameter: _FileName (type is String) Return: Integer I guess I need to use DLLImport in my ASP.NET code behind something like: [DLLImport("TestString.dll", PreserveSig=true, CharSet=CharSet.Unicode)] What else do I need to declare the export function? How to call that? thanks |