tapi.dll error message

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Hi Friends,

Type 'OpenNETCF.Tapi.LINEINITIALIZEEXPARAMS' cannot be marshaled as an unmanaged structure; no meaningful size or offset can be computed. plz help for above error. Thanks for advance.

Posted 8-Apr-14 2:02am

keerthana.k

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[no name] 8-Apr-14 8:22am

The error message means exactly what it says. Exactly what sort of help do you expect from us based on this?

keerthana.k 9-Apr-14 2:45am

Hi Wes Aday,
Actually I added the Tapi.dll and reference also. I created one aspx page and the code But I got above exception.So i don't know how to fix the exception.Please guide me how to solve the above issue.Thanks for reply.

keerthana.k 9-Apr-14 2:47am

i got execption in t.Initialize(); line

Member 11449697 22-Mar-16 3:22am

i am also getting same execption in t.Initialize();
did you find any solution?

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keerthana.k · Answer 1 · 2014-04-08T20:46:00

C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using OpenNETCF.Tapi;
using System.Runtime.InteropServices ;


public partial class Mobile_mSource_Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string myIMEIstring = getIMEIInfo();
        Label2.Text = "Mobile Number:" + myIMEIstring;
    }

    [DllImport("cellcore.dll")]
    internal static extern int lineGetGeneralInfo(IntPtr hLine, byte[] bCache);

    // code to get IMEI
    private string getIMEIInfo()
    {
        string IMEI;
        Tapi t = new Tapi();
        t.Initialize();
        Line _line = t.CreateLine(0, LINEMEDIAMODE.INTERACTIVEVOICE, LINECALLPRIVILEGE.MONITOR);

        byte[] buffer = new byte[512];
        //write size
        BitConverter.GetBytes(512).CopyTo(buffer, 0);

        if (lineGetGeneralInfo(_line.hLine, buffer) != 0)
        {
            throw new System.ComponentModel.Win32Exception(System.Runtime.InteropServices.Marshal.GetLastWin32Error(), "TAPI Error: " + System.Runtime.InteropServices.Marshal.GetLastWin32Error().ToString("X"));
        }

        int serialsize = BitConverter.ToInt32(buffer, 36);
        int serialoffset = BitConverter.ToInt32(buffer, 40);
        IMEI = System.Text.Encoding.Unicode.GetString(buffer, serialoffset, serialsize);
        IMEI = IMEI.Substring(0, IMEI.IndexOf(Convert.ToChar(0)));


        _line.Dispose();
        t.Shutdown();
        return (IMEI);
    }
}