System.IO.Packaging.Package.RelationshipExists C# (CSharp) Méthode

        public bool RelationshipExists(string id)
        {
            return Relationships.ContainsKey(id);
        }

        //------------------------------------------------------
        //
        //  Public Methods
        //
        //------------------------------------------------------

        #region Public Methods

        /// <summary>
        /// This method returns the list of selected PackageRelationships as per the
        /// given criteria, from a part in the Package provided
        /// </summary>
        /// <param name="package">Package object from which we get the relationsips</param>
        /// <returns></returns>
        /// <exception cref="ArgumentNullException">If package parameter is null</exception>
        public List<PackageRelationship> Select(Package package)
        {
            if (package == null)
            {
                throw new ArgumentNullException("package");
            }

            List<PackageRelationship> relationships = new List<PackageRelationship>(0);

            switch (SelectorType)
            {
                case PackageRelationshipSelectorType.Id:
                    if (SourceUri.Equals(PackUriHelper.PackageRootUri))
                    {
                        if (package.RelationshipExists(SelectionCriteria))
                            relationships.Add(package.GetRelationship(SelectionCriteria));
                    }
                    else
                    {
                        if (package.PartExists(SourceUri))
                        {
                            PackagePart part = package.GetPart(SourceUri);
                            if (part.RelationshipExists(SelectionCriteria))
                                relationships.Add(part.GetRelationship(SelectionCriteria));
                        }
                    }
                    break;

                case PackageRelationshipSelectorType.Type:
                    if (SourceUri.Equals(PackUriHelper.PackageRootUri))
                    {
                        foreach (PackageRelationship r in package.GetRelationshipsByType(SelectionCriteria))
                            relationships.Add(r);
                    }
                    else
                    {
                        if (package.PartExists(SourceUri))
                        {
                            foreach (PackageRelationship r in package.GetPart(SourceUri).GetRelationshipsByType(SelectionCriteria))
                                relationships.Add(r);
                        }
                    }
                    break;

                default:
                    //Debug.Assert is fine here since the parameters have already been validated. And all the properties are 
                    //readonly
                    Debug.Assert(false, "This option should never be called");
                    break;
            }

            return relationships;
        }