Validate XML over DTD

Introduction

We can Easily Export data from Excel, CSV file into individual Xml per Record. There is multiple xml file generated per record. This article explains how to validate xml over DTD (Document Type Definition).

Technologies
.NET

Language

C#

Prerequisite

Visual Studio 2005 and Later

Implementation

Following namespace will added

using System.Xml;
using System.Xml.Schema;

Take one window for in put one Textbox, open Button, validate button and fileopenDialogbox place on form.like

Which Take folder path of multiple xml files

Define Following Variable Global in form Class

private static bool isValid = true;
String StrErrorPath = Application.StartupPath + "/ValidateError.log";

Put Following code in open button click Event

{codecitation class="brush: csharp; gutter: true;" width="600px"}

private void btnoutput_Click(object sender, EventArgs e)
{

String strFolderName;
FDBrowserDL.ShowNewFolderButton = true;
FDBrowserDL.ShowDialog();
strFolderName = FDBrowserDL.SelectedPath;
Txtoutputpath.Text = strFolderName;

Txtoutputpath.Text = Convert.ToString(strFolderName);
}

{/codecitation}
Put Following code in Validate buttion Click event

{codecitation class="brush: csharp; gutter: true;" width="600px"}

private void btnValidate_Click(object sender, EventArgs e)
{

ValiDateXML(Convert.ToString(Txtoutputpath.Text));

}

{/codecitation}

Following are function Validate Xml over DTD. If there is error in file means if Xml file not match over DTD then it Give Error and Write Error in Error file with Description.

{codecitation class="brush: csharp; gutter: true;" width="600px"}

private void ValiDateXML(String StrFilePath)
{
Int64 i=0;
String[] fileEntries = Directory.GetFiles(StrFilePath);
foreach (String Sfile in fileEntries)
{
Application.DoEvents();
XmlTextReader r = new XmlTextReader(Sfile);
r.WhitespaceHandling = WhitespaceHandling.None;
XmlValidatingReader v = new XmlValidatingReader(r);
v.ValidationType = ValidationType.DTD;

v.ValidationEventHandler += MyValidationEventHandler;


i = i + 1;
Resume:
try
{
while (v.Read())

{
}
lblMessage.Text = "Validating File : " + i.ToString();
}
catch (Exception Ex)
{

WriteError(Sfile, Ex.Message);
goto Resume;
}

v.Close();



}
lblMessage.Text = "Check Validation Complete";
}



public void MyValidationEventHandler(object sender,
ValidationEventArgs args)
{
isValid = false;

WriteError(sender.ToString(),args.Message);

}


private void WriteError( String StrFilename, String Ex)
{
try
StreamWriter sw;

if (File.Exists(StrErrorPath)==false)
{
sw = new StreamWriter(StrErrorPath);
}
else
{
sw = new StreamWriter(StrErrorPath, true);
}

sw.WriteLine(StrFilename + " " +Ex);

sw.WriteLine("From the StreamWriter class");
sw.Close();
}
catch (Exception ex)
{
MessageBox.Show("Error occurred at writting to Error Log file. -- " + ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}

}
{/codecitation}

Conclusion

This article explain how to validate xml file with DTD (Document Type Definition)

Thank you

About the Author
	Kirti Darji P.G.D.C.A, M.SC(Computer Science) 3+ YEAR EXPERIENCE Visual C#.net and VB.net Windows and Web base Application Expertise :C#.net, VB.Net,ASP.net,SQL Server, MS Access,aJAX, JavaScript,CSS,HTML,XML,N TIRE ARCHITECTURE,oOPS,Web Services,Core Ajax,visual Source safe,IIS Occupation :SR. Software Developer Company : MADHUVAN INFO TECH PVT.LTD Location :AHMADABAD