Exemple #1
0
        /// <summary>
        /// Tests for object equality
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public override bool Equals(object obj)
        {
            if (object.ReferenceEquals(obj, this))
            {
                return(true);
            }
            ScriptControlEventAttribute other = obj as ScriptControlEventAttribute;

            if (other != null)
            {
                return(other._isScriptEvent == _isScriptEvent);
            }
            return(false);
        }
        public static void DescribeComponent(object instance, ScriptComponentDescriptor descriptor, IUrlResolutionService urlResolver, IControlResolver controlResolver)
        {
            // validate preconditions
            if (instance == null)
            {
                throw new ArgumentNullException("instance");
            }
            if (descriptor == null)
            {
                throw new ArgumentNullException("descriptor");
            }
            if (urlResolver == null)
            {
                urlResolver = instance as IUrlResolutionService;
            }
            if (controlResolver == null)
            {
                controlResolver = instance as IControlResolver;
            }

            // describe properties
            // PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(instance);

            PropertyInfo[] properties = instance.GetType().GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);

            foreach (PropertyInfo prop in properties)
            {
                ScriptControlPropertyAttribute propAttr  = null;
                ScriptControlEventAttribute    eventAttr = null;
                string propertyName = prop.Name;

                System.ComponentModel.AttributeCollection attribs = new System.ComponentModel.AttributeCollection(Attribute.GetCustomAttributes(prop, false));

                // Try getting a property attribute
                propAttr = (ScriptControlPropertyAttribute)attribs[typeof(ScriptControlPropertyAttribute)];
                if (propAttr == null || !propAttr.IsScriptProperty)
                {
                    // Try getting an event attribute
                    eventAttr = (ScriptControlEventAttribute)attribs[typeof(ScriptControlEventAttribute)];
                    if (eventAttr == null || !eventAttr.IsScriptEvent)
                    {
                        continue;
                    }
                }

                // attempt to rename the property/event
                ClientPropertyNameAttribute nameAttr = (ClientPropertyNameAttribute)attribs[typeof(ClientPropertyNameAttribute)];
                if (nameAttr != null && !string.IsNullOrEmpty(nameAttr.PropertyName))
                {
                    propertyName = nameAttr.PropertyName;
                }

                // determine whether to serialize the value of a property.  readOnly properties should always be serialized
                //bool serialize = true;// prop.ShouldSerializeValue(instance) || prop.IsReadOnly;
                //if (serialize)
                //{
                // get the value of the property, skip if it is null
                Control c     = null;
                object  value = prop.GetValue(instance, new object[0] {
                });
                if (value == null)
                {
                    continue;
                }

                // convert and resolve the value
                if (eventAttr != null && prop.PropertyType != typeof(String))
                {
                    throw new InvalidOperationException("ScriptControlEventAttribute can only be applied to a property with a PropertyType of System.String.");
                }
                else
                {
                    if (!prop.PropertyType.IsPrimitive && !prop.PropertyType.IsEnum)
                    {
                        if (prop.PropertyType == typeof(Color))
                        {
                            value = ColorTranslator.ToHtml((Color)value);
                        }
                        else
                        {
                            // TODO: Determine if we should let ASP.NET AJAX handle this type of conversion, as it supports JSON serialization
                            //TypeConverter conv = prop.Converter;
                            //value = conv.ConvertToString(null, CultureInfo.InvariantCulture, value);

                            //if (prop.PropertyType == typeof(CssStyleCollection))
                            //    value = (new CssStyleCollectionJSCoverter()).Serialize(value, new JavaScriptSerializer());
                            //if (prop.PropertyType == typeof(Style))
                            //    value = (new CssStyleCollectionJSCoverter()).Serialize(((Style)value).GetStyleAttributes(null), new JavaScriptSerializer());

                            Type valueType = value.GetType();

                            JavaScriptConverterAttribute attr      = (JavaScriptConverterAttribute)attribs[typeof(JavaScriptConverterAttribute)];
                            JavaScriptConverter          converter = attr != null ?
                                                                     (JavaScriptConverter)TypeCreator.CreateInstance(attr.ConverterType) :
                                                                     JSONSerializerFactory.GetJavaScriptConverter(valueType);

                            if (converter != null)
                            {
                                value = converter.Serialize(value, JSONSerializerFactory.GetJavaScriptSerializer());
                            }
                            else
                            {
                                value = JSONSerializerExecute.PreSerializeObject(value);
                            }

                            //Dictionary<string, object> dict = value as Dictionary<string, object>;
                            //if (dict != null && !dict.ContainsKey("__type"))
                            //    dict["__type"] = valueType.AssemblyQualifiedName;
                        }
                    }
                    if (attribs[typeof(IDReferencePropertyAttribute)] != null && controlResolver != null)
                    {
                        c = controlResolver.ResolveControl((string)value);
                    }
                    if (attribs[typeof(UrlPropertyAttribute)] != null && urlResolver != null)
                    {
                        value = urlResolver.ResolveClientUrl((string)value);
                    }
                }

                // add the value as an appropriate description
                if (eventAttr != null)
                {
                    if (!string.IsNullOrEmpty((string)value))
                    {
                        descriptor.AddEvent(propertyName, (string)value);
                    }
                }
                else if (attribs[typeof(ElementReferenceAttribute)] != null)
                {
                    if (c == null && controlResolver != null)
                    {
                        c = controlResolver.ResolveControl((string)value);
                    }
                    if (c != null)
                    {
                        value = c.ClientID;
                    }
                    descriptor.AddElementProperty(propertyName, (string)value);
                }
                else if (attribs[typeof(ComponentReferenceAttribute)] != null)
                {
                    if (c == null && controlResolver != null)
                    {
                        c = controlResolver.ResolveControl((string)value);
                    }
                    if (c != null)
                    {
                        //ExtenderControlBase ex = c as ExtenderControlBase;
                        //if (ex != null && ex.BehaviorID.Length > 0)
                        //    value = ex.BehaviorID;
                        //else
                        value = c.ClientID;
                    }
                    descriptor.AddComponentProperty(propertyName, (string)value);
                }
                else
                {
                    if (c != null)
                    {
                        value = c.ClientID;
                    }
                    descriptor.AddProperty(propertyName, value);
                }
            }
            //}

            // determine if we should describe methods
            foreach (MethodInfo method in instance.GetType().GetMethods(BindingFlags.Instance | BindingFlags.Static | BindingFlags.Public))
            {
                ScriptControlMethodAttribute methAttr = (ScriptControlMethodAttribute)Attribute.GetCustomAttribute(method, typeof(ScriptControlMethodAttribute));
                if (methAttr == null || !methAttr.IsScriptMethod)
                {
                    continue;
                }

                // We only need to support emitting the callback target and registering the WebForms.js script if there is at least one valid method
                Control control = instance as Control;
                if (control != null)
                {
                    // Force WebForms.js
                    control.Page.ClientScript.GetCallbackEventReference(control, null, null, null);

                    // Add the callback target
                    descriptor.AddProperty("_callbackTarget", control.UniqueID);
                }
                break;
            }
        }