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01.18.2008 at 10:35AM PST, ID: 23094204
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6.2

Web Service and VBScript

Asked by tommychiu in VB Script, C# Programming Language

Tags: ,

I can create the object but it fails on the ValidateXML method.

The error message: "XMLValidation: Object reference not set to an instance of an object.

The XMLValidation code and the vbscript provided as follow.Start Free Trial 
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using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Web;
using System.Web.Services;
using System.IO;
using System.Xml;
using System.Xml.Schema;
using System.Text;
using System.Runtime.Serialization;
using System.Runtime.InteropServices;
using System.Data.SqlClient;
 
namespace Thomson.TTA.DataExchange.XMLValidation
{    
    #region COM interop interface definition
	/// <summary>
	/// COM interop interface definition for accessing the RSTaxServices methods via
	/// COM languages such as VBScript.  See the <see cref="RSTaxWSInterface"/> class
	/// for complete descriptions of the interface elements.
	/// </summary>
	// Since the .NET Framework interface and coclass have to behave as 
	// COM objects, we have to give them guids.
    [Guid("AB439215-C3A8-4e28-B382-9866DD27D6C3")]
	[InterfaceType(ComInterfaceType.InterfaceIsDual)]
	public interface IXMLValidatorInterface
	{
        [DispId(1)]
        bool ValidateXML(string strDCAppl, string strImportExport, string strFirm, string strAccount, string strTaxAppl, string strTaxType, string strLocator, string strYear, string strXMLFile, string strXSDFile, out string ErrCode);		
	}
	#endregion	
	
	/// <summary>
    /// Summary description for XMLValidation
    /// </summary>
    [Guid("4C79CEF3-0F73-4c49-ABF0-61E2837529F4")]
    [ClassInterface(ClassInterfaceType.None)]
    [WebService(Namespace="Thomson.TTA.DataExchange.XMLValidation", Description="Data Exchange XML Validation")]
    public class XMLValidation : System.Web.Services.WebService, IXMLValidatorInterface, IDisposable
    {
        private bool XmlIsNotValid = false;
        private bool bolExceptions = false;
        
        MemoryStream oStream = null;
        
        System.Xml.XmlTextWriter xWriter = null;
        
        private string LogDirPath = "";
 
        //This method validates an xml file.
       [WebMethod(MessageName = "ValidateXML", Description = "This method validates the XML file.")]
       public bool ValidateXML(string strDCAppl, string strImportExport, string strFirm, string strAccount, string strTaxAppl, string strTaxType, string strLocator, string strYear, string strXMLFile, string strXSDFile, out string ErrCode)
        {
            bool retVal = false;
 
            ErrCode = "";
 
            if (File.Exists(@strXMLFile))
            {
                StreamReader sr = new StreamReader(@strXMLFile);
                string xmlString = sr.ReadToEnd();
 
                if (xmlString != "")
                {
                    try
                    {
                        LogDirPath = GetDataRetrievalPath();
 
                        if (LogDirPath == "")
                        {
                            ErrCode = "DATA_RETRIEVE_MGT_ERROR";
                            return false;
                        }
 
                        LogDirPath += "\\" + strDCAppl + strImportExport + strFirm + strAccount + strTaxAppl + strTaxType + strLocator + strYear;
 
                        Directory.CreateDirectory(LogDirPath);
 
                        //Start recording
                        oStream = new MemoryStream();
                        xWriter = new System.Xml.XmlTextWriter(oStream, System.Text.Encoding.UTF8);
                        xWriter.Formatting = System.Xml.Formatting.Indented;
                        xWriter.WriteStartDocument(true);
                        xWriter.WriteStartElement(strDCAppl + strImportExport);
                        xWriter.WriteAttributeString("file", strXMLFile);
 
                        retVal = ValidateXmlFragment(xmlString, GetBaseDirectory() + strXSDFile);
 
                        xWriter.WriteEndDocument();
 
                        if (bolExceptions == true)
                        {
                            xWriter.Flush();
                            oStream.Position = 0;
                            StreamReader srDoc = new StreamReader(oStream);
                            XmlDocument xLogDoc = new XmlDocument();
                            xLogDoc.LoadXml(srDoc.ReadToEnd());
                            xLogDoc.Save(LogDirPath + "\\" + strDCAppl + "_ERROR_LOG.xml");
 
                            //Copy source file too
                            File.Copy(strXMLFile, LogDirPath + "\\" + Path.GetFileName(strXMLFile), true);
 
                            //Now delete file
                            File.Delete(strXMLFile);
                        }
                        else
                        {
                            try
                            {
                                //Delete log dir
                                Directory.Delete(LogDirPath);
                            }
                            catch (Exception)
                            {
                                ErrCode = "ERROR_DELETING_FOLDER";
                            }
                        }
                    }
                    catch (Exception e)
                    {
                        throw e;
                    }
                    finally
                    {
                        sr.Close();
                    }
                }
                else
                {
                    ErrCode = "INVALID_FILE";
                    return false;
                }
            }
            else
            {
                ErrCode = "INVALID_FILE";
                return false;
            }
            return retVal;
        }
 
        private static string GetBaseDirectory()
        {
            string BaseDirectory = System.Reflection.Assembly.GetExecutingAssembly().Location;
            BaseDirectory = Path.GetDirectoryName(BaseDirectory);
 
            if (BaseDirectory.EndsWith("\\"))
                return BaseDirectory;
            else
                return BaseDirectory + "\\";
        }
 
        private bool ValidateXmlFragment(string fragment, string schemaPath)
        {
            XmlReader reader = null;
       
            try
            {
                ValidationEventHandler veh = new ValidationEventHandler(ValidationHandler);
                XmlSchema schema = XmlSchema.Read(new XmlTextReader(schemaPath), veh);
 
                XmlReaderSettings settings = new XmlReaderSettings();
                settings.Schemas.Add(schema);
                settings.IgnoreWhitespace = true;
                settings.ValidationType = ValidationType.Schema; ////this line is neccessary for validation to work
                settings.ValidationEventHandler += new ValidationEventHandler(ValidationHandler);
                reader = XmlReader.Create(new StringReader(fragment), settings);
    
                while (reader.Read());
                reader.Close();
 
                if (bolExceptions == true)
                    xWriter.WriteEndElement(); // </Exceptions>
 
                xWriter.WriteEndElement(); // </strDCAppl + strImportExport>
 
                if (XmlIsNotValid)
                    return false;
 
                return true;
            }
            catch (Exception ex)
            {
                WriteValidationError(ex.Message);
                bolExceptions = true;
                xWriter.WriteEndElement(); // </Exceptions>
                xWriter.WriteEndElement(); // </strDCAppl + strImportExport>
                return false;
            }
            finally
            {
                reader.Close();
            }
        }
 
        private void ValidationHandler(object sender, ValidationEventArgs args)
        {
            XmlIsNotValid = true;
            WriteValidationError(args.Message.ToString());
            bolExceptions = true;
        }
 
        private void WriteValidationError(string err)
        {
            if (xWriter != null)
            {
                if (bolExceptions == false)
                    xWriter.WriteStartElement("ValidationErrors");
                    xWriter.WriteStartElement("ValidationError");
                    xWriter.WriteString(err);
                    xWriter.WriteEndElement();
                    //Remember to set bolExceptions = true; when you exit back out to main routine.
            }
        }
 
        private static string GetDataRetrievalPath()
        {
            string sServer = "";
            string sPort = "";
            string sDatabase = "";
            string sUser = "";
            string sPwd = "";
            string strSQl = "";
 
            DataAccess oManagerData = null;
 
            try
            {
                Microsoft.Win32.RegistryKey regkey = Microsoft.Win32.Registry.LocalMachine.OpenSubKey(@"SOFTWARE\CLR\RS.Installation\eDatabases\eRSDataSource");
 
                if (regkey == null)
                    throw new Exception("Error obtaining credentials");
                else
                {
                    sServer = MTIDataObjects.Thomson.Ria.InSource.GlobalDataCollect.Crypto.RSDecrypt((string)regkey.GetValue("Server"));
                    sPort = MTIDataObjects.Thomson.Ria.InSource.GlobalDataCollect.Crypto.RSDecrypt((string)regkey.GetValue("Port"));
                    sDatabase = MTIDataObjects.Thomson.Ria.InSource.GlobalDataCollect.Crypto.RSDecrypt((string)regkey.GetValue("Database"));
                    sUser = MTIDataObjects.Thomson.Ria.InSource.GlobalDataCollect.Crypto.RSDecrypt((string)regkey.GetValue("UID"));
                    sPwd = MTIDataObjects.Thomson.Ria.InSource.GlobalDataCollect.Crypto.RSDecrypt((string)regkey.GetValue("PWD"));
                    string ConnStrMan = "Server=" + sServer + "," + sPort + ";User ID=" + sUser + ";Password=" + sPwd + ";Initial Catalog=" + sDatabase;
 
                    strSQl = "select value from WebConfig(nolock) where parameter = 'DataRetrievePath'";
                    oManagerData = new DataAccess(ConnStrMan);
                    SqlDataReader drManager = oManagerData.GetData(strSQl);
 
                    if (drManager.HasRows)
                    {
                        drManager.Read();
                        return drManager.GetValue(0).ToString();
                    }
                    return "";
                }
            }
            catch (Exception)
            {
                return "";
            }
            finally
            {
                oManagerData.Close();
            }
        }
    }
}
*******************************VBScript
'<SCRIPT LANGUAGE="VBScript">
 
 
Main
 
 
Sub Main
 
 
    Dim objValidator
    set objValidator = CreateObject("Thomson.TTA.DataExchange.XMLValidation.XMLValidation")
 
    If Err.Number <> 0 Or Not IsObject(objValidator) Then
        MsgBox "Unable to create XMLValidator", 100, Err.Description
    else
          MsgBox "XMLValiator Successfully created", 100, "XMLValiator Successfully created"
    end if	
 
    dim bRetVal
    dim strErrorCode
    strErrorCode = ""
    
    bRetVal = objValidator.ValidateXML("TEQ", "IMP", "FT", "7232", "1040", "A", "98784C", "2007", "C:\ftdata\2007\TEQ\A98784C7.xml", "C:\datadict\2007\appfiles\teq\tta1040teq7schema.xsd", strErrorCode)
    
    If bRetVal Then
        MsgBox "bRetVal XMLValidator Error", 100, Err.Description
    else
        MsgBox "bRetVal XMLValidator OK", 100, Err.Description    
    end if   
    
    If Err.Number <> 0 then 
        MsgBox "Err XMLValidator Error", 100, Err.Description
    else
        MsgBox "XMLValidator OK", 100, Err.Description
    end if   
    
End Sub
 
'</SCRIPT>
[+][-]01.21.2008 at 05:17AM PST, ID: 20705723

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About this solution

Zones: VB Script, C# Programming Language
Tags: Visual Studio, 2005
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Solution Provided By: tommychiu
Participating Experts: 2
Solution Grade: B
 
 
[+][-]01.24.2008 at 09:56AM PST, ID: 20735401

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