Wpf XmlDataProvider validation based on XSD schema

I was working with a similar problem, loading XAML on the fly and validating user input. But in my situation I have a global DataContext

and all the download controls are bound to that context. When validation actions are performed, for example a custom button to "validate" the data is DataContext

serialized to XML and after that I used XSLT to get error tags from that XML, but I think you can use XSD if you can serialize DataContext

to that XSD.

My steps:

• Loading Xaml and setting my object to container DataContext
  
  

  String xaml="some xaml";
  MyData myData=new MyData();
  TextReader textReader = new StringReader(CardContext.Xaml);
  XmlReader xmlReader = XmlReader.Create(textReader);
  //setting DataContext for panel named 'content'
  this.content.DataContext = myData;
  FrameworkElement myContent = (FrameworkElement) XamlReader.Load(xmlReader);
  this.content.Children.Clear();
  this.content.Children.Add(myContent);
  InitMyComponents(this.content);
  
        
  
          
          
          
        
  
      

• Manages inside the xaml binding to the DataContext. DataContext is the MyData class. For example:

  public class MyData
  {
      IDictionary<String, MyControl> MyControls{get;set;}
      ....
  }
  
        
  
          
          
          
        
  
      

  Where

  class MyControl
  {
     String Id{get;set;}
     String Name{get;set;}
     String Value{get;set;}
  }
  
        
  
          
          
          
        
  
      

  Getting Bindings for Controls

  public static  Binding GetValueBinding(MyControl control)
  {
     Binding valueBinding = new Binding();
     valueBinding.Mode = BindingMode.TwoWay;
     valueBinding.Path = new PropertyPath("MyControls["+control.Id+"].Value");
     return valueBinding;
  }
  
        
  
          
          
          
        
  
      

• The user works with the controls and changes some values.

• When the user needs validation, I put the data into an XSD schema named MyMetaData (inside this schema, I have a MyControls table).

  MyMetaData _myMetaData;
  
  public void PushData(MyData myData)
      {
  
          foreach (MyControl control in myData.MyControls)
          {
           //fill table from xsd schema
     this._myMetaData.MyControls.AddMyControlsRow(control.Id,control.Name,control.Value);
  
  
          }
  
          this._myMetaData.AcceptChanges();
      }
  
        
  
          
          
          
        
  
      

• Getting XML from DataTable

  this._myMetaData.MyControls.GetXml()
  
        
  
          
          
          
        
  
      

• XML validation with xslt

  XslCompiledTransform xslCompiledTransform = new XslCompiledTransform(); 
  String xml = "some xml";
  TextReader textReader = new StringReader(xml );
  XmlReader xmlReader = XmlReader.Create(textReader);
  StringBuilder validationResult = new StringBuilder();
  XmlWriter xmlWriter = XmlWriter.Create(validationResult);
  //aply xslt (xslt return tags with error description and control Id)
  xslCompiledTransform.Transform(xmlReader, xmlWriter);
  //parsing result tags
  IList<ValidationError> parsedResult = ParseValidationResult(validationResult.ToString());
  
        
  
          
          
          
        
  
      

• Find controls and runtime to display error information

  DependencyObject errorSource = LogicalTreeHelper.FindLogicalNode(this.content, error.Identifier);
  if (errorSource == null)
      return;
  if (errorSource is MyControl)
     (errorSource as MyControl).ShowErrorInfo(error.ErrorText);
  
        
  
          
          
          
        
  
      

This is my algorithm, but if you have some constraints on the XSD schema you will get errors in step 4 when you put the data into DataTable

.