/// <summary>
/// 对元素进行数据绑定
/// </summary>
/// <param name="element">要进行数据绑定的元素</param>
protected virtual void DataBind( IHtmlElement element, BindingContext context )
{
var bindings = FindBindings( element ).OrderBy( b => b.Priority );
context.Enter( element );
bindings.ForAll( b => b.DataBind( context ) );
element.Elements().ForAll( e => DataBind( e, context ) );
context.Exit( element );
}
/// <summary>
/// 对文档进行数据绑定
/// </summary>
/// <param name="document">要进行数据绑定的文档</param>
protected virtual void DataBind( IHtmlDocument document, object dataContext )
{
var bindings = FindBindings( document ).OrderBy( b => b.Priority );
var context = new BindingContext( this, dataContext );
bindings.ForAll( b => b.DataBind( context ) );
document.Elements().ForAll( e => DataBind( e, context ) );
}
public void DataBind( BindingContext context )
{
object dataObject = null;
var dataContext = context.DataContext;
if ( dataContext != null )
{
string path;
if ( _arguments.TryGetValue( "path", out path ) )
dataObject = Eval( dataContext, path );
else
dataObject = dataContext;
}
string converterName;
if ( !_arguments.TryGetValue( "converter", out converterName ) )
converterName = null;
string binderName;
if ( _arguments.TryGetValue( "binder", out binderName ) )
{
var valueBinder = context.BindingManager.GetValueBinder( BindingHost, binderName );
if ( valueBinder != null )
{
var value = context.BindingManager.ConvertValue( dataObject, valueBinder.ValueType, converterName );
valueBinder.BindValue( BindingHost, value );
return;
}
}
{
var target = context.BindingManager.GetTarget( BindingHost );
var value = context.BindingManager.ConvertValue( dataContext, target.ValueType, converterName );
target.BindValue( value );
}
}
protected virtual object ConvertValue( BindingContext context, object dataObject, Type targetType )
{
var converter = context.BindingManager.GetConverter( _arguments["converter"], targetType );
if ( converter != null )
return converter.Convert( dataObject );
return dataObject;
}
