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Editorial Team
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Asked: 2026-05-30T02:35:16+00:00

EDITED QUESTION Hi this is the total workflow of this project we have a

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EDITED QUESTION

Hi this is the total workflow of this project

we have a application which is written in cobol, wee can communicate to that application using only a C DLL, the method which we have to call in the dll is given below

[DllImport(@"C:\CCExpert\haz450cp.dll", EntryPoint = "HAZ450CP", CallingConvention = CallingConvention.Cdecl)]
    unsafe public static extern void HAZ450CP(ref p45_control p45_controlx, out p45_clreturn p45_clreturnx, ref p45_clclaim p45_clclaimx);

what we did is we are invoking that C dll from a C# DLL, this C# dll working fine with console application, it means we can give the input to it and we are getting proper output also from console application.

But when i try to call the same C#DLL from the ASP.NET WebService its giving error
Error 1

After select the debug option i get another window like fallowing

enter image description here

Thanks

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1 Answer

  1. Editorial Team

    I know this might sound a little stupid, but can your asp.net user read contents from the directory where the DLL is located?

    You can do this test by copying you DLL to the bin directory of your web application folder and changing the DLL path from C:\CCExpert\haz450cp.DLL to just haz450cp.DLL

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