public void CallServiceMNB()
    {
        ServiceReference1.SOAPCLIENT objMNB = new ServiceReference1.SOAPCLIENT();
        ServiceReference1.SOAPCLIENTinput input = new ServiceReference1.SOAPCLIENTinput();
        string Username = "xxx";
        string Password = "xxxx";
        objMNB.ClientCredentials.UserName.UserName = Username;
        objMNB.ClientCredentials.UserName.Password = Password;
        input.p_FROM_DATE = "01-01-2018";
        input.p_JE_CATEGORY = "xxxx";
        input.p_GROUP_ID = "";
        input.p_JE_SOURCE = "YYYYYY";
        input.p_LEDGER_NAME = "YYYYY";
        input.p_TO_DATE = "31-12-2018";
        try
        {
            objMNB.Open();
            objMNB.GetGLDetails(input);
            objMNB.Close();
        }
        catch (Exception Ex)
        {
            this.richTextBox1.Text = Ex.ToString();
            objMNB.Close();
        }
    }