Get a error list after validate xml against a schema file

Question

I´m validating a XML file against a schema xsd. So far so good, the code generates a exception in case of failure.

 bool isValid = true; List<string> errorList = new List<string>(); try { XmlReaderSettings settings = new XmlReaderSettings(); settings.Schemas.Add(null, schemaFilePath); settings.ValidationType = ValidationType.Schema; XmlDocument document = new XmlDocument(); document.LoadXml(xml); XmlReader rdr = XmlReader.Create(new StringReader(document.InnerXml), settings); while (rdr.Read()) { } } catch (Exception ex) { errorList.Add(ex.Message); isValid = false; } LogErrors(errorList); return isValid;

But I need that the code build a list of all errors found in the validate before send it to my log, instead of always show only the first one found.

Any thoughts?

Your catch does nothing with the error. What is the error you are getting, and why are you not doing anything with it? — gunr2171
– gunr2171, Commented Aug 7, 2013 at 19:07
Why don't you return an Exception instead? And then simply log it, or put is on an array or a list. — Hanlet Escaño
– Hanlet Escaño, Commented Aug 7, 2013 at 19:12
The exception holds only one error at the time an then exits the verification. I want to store all errors in a list and then return it to be handled. The code above is just an example that I found. — Rafael Kayser Smiderle
– Rafael Kayser Smiderle, Commented Aug 7, 2013 at 19:21
"the exception holds..." Where is this exception you speak of? Your catch squashes any exception. Yes it is true that the function will return false when it encounters the first error, but you don't even know what the error is! — gunr2171
– gunr2171, Commented Aug 7, 2013 at 20:10
It's not that hard to understand what I want to do, but I changed the code. I hope is more understandable now. — Rafael Kayser Smiderle
– Rafael Kayser Smiderle, Commented Aug 7, 2013 at 20:22

gitsitgo · Accepted Answer · 2013-08-07 20:15:51Z

You can use the Validate method with a ValidationEventHandler. you can follow MSDN's way of creating the ValidationEventHandler separately or do it inline if you want.

e.g

 //...Other code above XmlDocument document = new XmlDocument(); document.Load(pathXMLCons); document.Validate((o, e) => { //Do your error logging through e.message });

If you don't do this, a XmlSchemaValidationException will be thrown and only that one can be caught.

Prabhakaran Rajagopal · Accepted Answer · 2017-05-31 12:18:26Z

I tried XmlDocument which failed in my case. The below code should work Courtesy: C#5.0 in a nutshell

XDocument doc = XDocument.Load("contosoBooks.xml"); XmlSchemaSet set = new XmlSchemaSet(); set.Add(null, "contosoBooks.xsd"); StringBuilder errors = new StringBuilder(); doc.Validate(set, (sender,args) => { errors.AppendLine(args.Exception.Message); }); Console.WriteLine(errors);

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