C# StringBuilder.AppendMetaPropertyContentIfNotNull方法代码示例

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            stringBuilder.AppendMetaPropertyContentIfNotNull("books:author", this.AuthorUrls);
            stringBuilder.AppendMetaPropertyContentIfNotNull("books:book", this.BookUrls);
            stringBuilder.AppendMetaPropertyContentIfNotNull("books:canonical_name", this.CanonicalName);
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            stringBuilder.AppendMetaPropertyContentIfNotNull("book:author", this.AuthorUrl);
            stringBuilder.AppendMetaPropertyContentIfNotNull("book:isbn", this.Isbn);
            stringBuilder.AppendMetaPropertyContentIfNotNull("book:release_date", this.ReleaseDate);
            stringBuilder.AppendMetaPropertyContentIfNotNull("book:tag", this.Tags);
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            stringBuilder.AppendMetaPropertyContentIfNotNull("business:contact_data:street_address", this.ContactData.StreetAddress);
            stringBuilder.AppendMetaPropertyContentIfNotNull("business:contact_data:locality", this.ContactData.Locality);
            stringBuilder.AppendMetaPropertyContentIfNotNull("business:contact_data:region", this.ContactData.Region);
            stringBuilder.AppendMetaPropertyContentIfNotNull("business:contact_data:postal_code", this.ContactData.PostalCode);
            stringBuilder.AppendMetaPropertyContentIfNotNull("business:contact_data:country_name", this.ContactData.Country);
            stringBuilder.AppendMetaPropertyContentIfNotNull("business:contact_data:email", this.ContactData.Email);
            stringBuilder.AppendMetaPropertyContentIfNotNull("business:contact_data:phone_number", this.ContactData.Phone);
            stringBuilder.AppendMetaPropertyContentIfNotNull("business:contact_data:fax_number", this.ContactData.Fax);
            stringBuilder.AppendMetaPropertyContentIfNotNull("business:contact_data:website", this.ContactData.Website);

            if (this.OpeningHours != null)
            {
                foreach (OpenGraphHours hours in this.OpeningHours)
                {
                    stringBuilder.AppendMetaPropertyContent("business:hours:day", hours.Day.ToLowercaseString());
                    stringBuilder.AppendMetaPropertyContent("business:hours:start", hours.Start.ToString(TimeOfDayFormat));
                    stringBuilder.AppendMetaPropertyContent("business:hours:end", hours.End.ToString(TimeOfDayFormat));
                }
            }

            stringBuilder.AppendMetaPropertyContent("place:location:latitude", this.Location.Latitude);
            stringBuilder.AppendMetaPropertyContent("place:location:longitude", this.Location.Longitude);
            stringBuilder.AppendMetaPropertyContentIfNotNull("place:location:altitude", this.Location.Altitude);
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            stringBuilder.AppendMetaPropertyContentIfNotNull("music:song", this.SongUrls);

            // The number of songs on the playlist. This is a Facebook specific property.
            stringBuilder.AppendMetaPropertyContentIfNotNull("music:song_count", this.SongUrls.Count());

            stringBuilder.AppendMetaPropertyContent("music:song:disc", this.SongDisc);
            stringBuilder.AppendMetaPropertyContent("music:song:track", this.SongTrack);
            stringBuilder.AppendMetaPropertyContentIfNotNull("music:creator", this.CreatorUrl);
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            stringBuilder.AppendMetaPropertyContent("place:location:latitude", this.Location.Latitude);
            stringBuilder.AppendMetaPropertyContent("place:location:longitude", this.Location.Longitude);
            stringBuilder.AppendMetaPropertyContentIfNotNull("place:location:altitude", this.Location.Altitude);
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            stringBuilder.AppendMetaPropertyContent("place:location:latitude", this.Location.Latitude);
            stringBuilder.AppendMetaPropertyContent("place:location:longitude", this.Location.Longitude);
            stringBuilder.AppendMetaPropertyContentIfNotNull("place:location:altitude", this.Location.Altitude);

            if (this.Categories != null)
            {
                foreach (string category in this.Categories)
                {
                    stringBuilder.AppendMetaPropertyContent("restaurant:category", category);
                }
            }

            if (this.ContactInfo != null)
            {
                stringBuilder.AppendMetaPropertyContentIfNotNull("restaurant:contact_data:street_address", this.ContactInfo.StreetAddress);
                stringBuilder.AppendMetaPropertyContentIfNotNull("restaurant:contact_data:locality", this.ContactInfo.Locality);
                stringBuilder.AppendMetaPropertyContentIfNotNull("restaurant:contact_data:region", this.ContactInfo.Region);
                stringBuilder.AppendMetaPropertyContentIfNotNull("restaurant:contact_data:postal_code", this.ContactInfo.PostalCode);
                stringBuilder.AppendMetaPropertyContentIfNotNull("restaurant:contact_data:country_name", this.ContactInfo.Country);
                stringBuilder.AppendMetaPropertyContentIfNotNull("restaurant:contact_data:email", this.ContactInfo.Email);
                stringBuilder.AppendMetaPropertyContentIfNotNull("restaurant:contact_data:phone_number", this.ContactInfo.Phone);
                stringBuilder.AppendMetaPropertyContentIfNotNull("restaurant:contact_data:fax_number", this.ContactInfo.Fax);
                stringBuilder.AppendMetaPropertyContentIfNotNull("restaurant:contact_data:website", this.ContactInfo.Website);
            }

            if (this.MenuUrls != null)
            {
                foreach (string menuUrl in this.MenuUrls)
                {
                    stringBuilder.AppendMetaPropertyContent("restaurant:menu", menuUrl);
                }
            }

            stringBuilder.AppendMetaPropertyContentIfNotNull("restaurant:price_rating", this.PriceRating);
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            stringBuilder.AppendMetaPropertyContentIfNotNull("music:duration", this.Duration);
            stringBuilder.AppendMetaPropertyContentIfNotNull("music:album", this.AlbumUrls);
            stringBuilder.AppendMetaPropertyContent("music:album:disc", this.AlbumDisc);
            stringBuilder.AppendMetaPropertyContent("music:album:track", this.AlbumTrack);
            stringBuilder.AppendMetaPropertyContentIfNotNull("music:musician", this.MusicianUrls);
            stringBuilder.AppendMetaPropertyContentIfNotNull("music:isrc", this.ISRC);
            stringBuilder.AppendMetaPropertyContentIfNotNull("music:release_date", this.ReleaseDate);

            if (this.ReleaseType.HasValue)
            {
                stringBuilder.AppendMetaPropertyContent("music:release_type", this.ReleaseType.Value.ToLowercaseString());
            }
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            stringBuilder.AppendMetaPropertyContentIfNotNull("music:song", this.SongUrls);
            stringBuilder.AppendMetaPropertyContent("music:song:disc", this.SongDisc);
            stringBuilder.AppendMetaPropertyContent("music:song:track", this.SongTrack);
            stringBuilder.AppendMetaPropertyContentIfNotNull("music:musician", this.MusicianUrls);
            stringBuilder.AppendMetaPropertyContentIfNotNull("music:release_date", this.ReleaseDate);

            if (this.ReleaseType.HasValue)
            {
                stringBuilder.AppendMetaPropertyContent("music:release_type", this.ReleaseType.Value.ToLowercaseString());
            }
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            if (this.Actors != null)
            {
                foreach (OpenGraphActor actor in this.Actors)
                {
                    stringBuilder.AppendMetaPropertyContentIfNotNull("video:actor", actor.ActorUrl);
                    stringBuilder.AppendMetaPropertyContentIfNotNull("video:actor:role", actor.Role);
                }
            }

            stringBuilder.AppendMetaPropertyContentIfNotNull("video:director", this.DirectorUrls);
            stringBuilder.AppendMetaPropertyContentIfNotNull("video:writer", this.WriterUrls);
            stringBuilder.AppendMetaPropertyContentIfNotNull("video:duration", this.Duration);
            stringBuilder.AppendMetaPropertyContentIfNotNull("video:release_date", this.ReleaseDate);
            stringBuilder.AppendMetaPropertyContentIfNotNull("video:tag", this.Tags);
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            if (this.AgeGroup.HasValue)
            {
                stringBuilder.AppendMetaPropertyContent("product:age_group", this.AgeGroup.Value.ToLowercaseString());
            }

            stringBuilder.AppendMetaPropertyContent("product:availability", this.Availability.ToLowercaseString());
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:brand", this.Brand);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:category", this.Category);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:color", this.Colour);
            stringBuilder.AppendMetaPropertyContent("product:condition", this.Condition.ToLowercaseString());
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:expiration_time", this.ExpirationTime);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:group_ref", this.GroupUrl);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:gtin", this.GTIN);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:mfr_part_no", this.ManufacturerPartNumber);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:material", this.Material);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:pattern", this.Pattern);

            foreach (OpenGraphCurrency price in this.Prices)
            {
                stringBuilder.AppendMetaPropertyContent("product:price:amount", price.Amount);
                stringBuilder.AppendMetaPropertyContent("product:price:currency", price.Currency);
            }

            stringBuilder.AppendMetaPropertyContentIfNotNull("product:retailer_category", this.RetailerCategory);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:retailer_group_id", this.RetailerGroupId);
            stringBuilder.AppendMetaPropertyContent("product:retailer_item_id", this.RetailerItemId);

            if (this.SalePrice != null)
            {
                stringBuilder.AppendMetaPropertyContent("product:sale_price:amount", this.SalePrice.Amount);
                stringBuilder.AppendMetaPropertyContent("product:sale_price:currency", this.SalePrice.Currency);
            }

            if (this.SalePriceDates != null)
            {
                stringBuilder.AppendMetaPropertyContent("product:sale_price_dates:start", this.SalePriceDates.Start);
                stringBuilder.AppendMetaPropertyContent("product:sale_price_dates:end", this.SalePriceDates.End);
            }

            if (this.ShippingCost != null)
            {
                foreach (OpenGraphCurrency shippingCost in this.ShippingCost)
                {
                    stringBuilder.AppendMetaPropertyContent("product:shipping_cost:amount", shippingCost.Amount);
                    stringBuilder.AppendMetaPropertyContent("product:shipping_cost:currency", shippingCost.Currency);
                }
            }

            if (this.ShippingWeight != null)
            {
                stringBuilder.AppendMetaPropertyContent("product:shipping_weight:value", this.ShippingWeight.Value);
                stringBuilder.AppendMetaPropertyContent("product:shipping_weight:units", this.ShippingWeight.Units);
            }

            stringBuilder.AppendMetaPropertyContentIfNotNull("product:size", this.Size);

            if (this.TargetGender.HasValue)
            {
                stringBuilder.AppendMetaPropertyContent("product:target_gender", this.TargetGender.Value.ToLowercaseString());
            }
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            if (this.AgeGroup.HasValue)
            {
                stringBuilder.AppendMetaPropertyContent("product:age_group", this.AgeGroup.Value.ToLowercaseString());
            }

            if (this.Availability.HasValue)
            {
                stringBuilder.AppendMetaPropertyContent("product:availability", this.Availability.Value.ToLowercaseString());
            }

            stringBuilder.AppendMetaPropertyContentIfNotNull("product:brand", this.Brand);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:category", this.Category);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:color", this.Colour);

            if (this.Condition.HasValue)
            {
                stringBuilder.AppendMetaPropertyContent("product:condition", this.Condition.Value.ToLowercaseString());
            }

            stringBuilder.AppendMetaPropertyContentIfNotNull("product:ean", this.EAN);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:expiration_time", this.ExpirationTime);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:is_product_shareable", this.IsShareable);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:isbn", this.ISBN);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:material", this.Material);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:mfr_part_no", this.ManufacturerPartNumber);

            if (this.OriginalPrices != null)
            {
                foreach (OpenGraphCurrency originalPrice in this.OriginalPrices)
                {
                    stringBuilder.AppendMetaPropertyContent("product:original_price:amount", originalPrice.Amount);
                    stringBuilder.AppendMetaPropertyContent("product:original_price:currency", originalPrice.Currency);
                }
            }

            stringBuilder.AppendMetaPropertyContentIfNotNull("product:pattern", this.Pattern);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:plural_title", this.PluralTitle);

            if (this.PretaxPrices != null)
            {
                foreach (OpenGraphCurrency pretaxPrice in this.PretaxPrices)
                {
                    stringBuilder.AppendMetaPropertyContent("product:pretax_price:amount", pretaxPrice.Amount);
                    stringBuilder.AppendMetaPropertyContent("product:pretax_price:currency", pretaxPrice.Currency);
                }
            }

            if (this.Prices != null)
            {
                foreach (OpenGraphCurrency price in this.Prices)
                {
                    stringBuilder.AppendMetaPropertyContent("product:price:amount", price.Amount);
                    stringBuilder.AppendMetaPropertyContent("product:price:currency", price.Currency);
                }
            }

            stringBuilder.AppendMetaPropertyContentIfNotNull("product:product_link", this.ProductLinkUrl);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:purchase_limit", this.PurchaseLimit);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:retailer", this.RetailerUrl);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:retailer_category", this.RetailerCategory);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:retailer_part_no", this.RetailerPartNumber);
            stringBuilder.AppendMetaPropertyContentIfNotNull("product:retailer_title", this.RetailerTitle);

            if (this.SalePrice != null)
            {
                stringBuilder.AppendMetaPropertyContent("product:sale_price:amount", this.SalePrice.Amount);
                stringBuilder.AppendMetaPropertyContent("product:sale_price:currency", this.SalePrice.Currency);
            }

            if (this.SalePriceDates != null)
            {
                stringBuilder.AppendMetaPropertyContent("product:sale_price_dates:start", this.SalePriceDates.Start);
                stringBuilder.AppendMetaPropertyContent("product:sale_price_dates:end", this.SalePriceDates.End);
            }

            if (this.ShippingCost != null)
            {
                foreach (OpenGraphCurrency shippingCost in this.ShippingCost)
                {
                    stringBuilder.AppendMetaPropertyContent("product:shipping_cost:amount", shippingCost.Amount);
                    stringBuilder.AppendMetaPropertyContent("product:shipping_cost:currency", shippingCost.Currency);
                }
            }

            if (this.ShippingWeight != null)
            {
                stringBuilder.AppendMetaPropertyContent("product:shipping_weight:value", this.ShippingWeight.Value);
                stringBuilder.AppendMetaPropertyContent("product:shipping_weight:units", this.ShippingWeight.Units);
            }

            stringBuilder.AppendMetaPropertyContentIfNotNull("product:size", this.Size);

//.........这里部分代码省略.........

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public virtual void ToString(StringBuilder stringBuilder)
        {
            // Three required tags.
            stringBuilder.AppendMetaPropertyContent("og:title", this.Title);
            if (this.Type != OpenGraphType.Website)
            {
                // The type property is also required but if absent the page will be treated as type website.
                stringBuilder.AppendMetaPropertyContent("og:type", this.Type.ToLowercaseString());
            }
            stringBuilder.AppendMetaPropertyContent("og:url", this.Url);

            // Add image, video and audio tags.
            foreach (OpenGraphMedia media in this.media)
            {
                media.ToString(stringBuilder);
            }

            stringBuilder.AppendMetaPropertyContentIfNotNull("og:description", this.Description);
            stringBuilder.AppendMetaPropertyContentIfNotNull("og:site_name", this.SiteName);

            if (this.Determiner != OpenGraphDeterminer.Blank)
            {
                stringBuilder.AppendMetaPropertyContent("og:determiner", this.Determiner.ToLowercaseString());
            }

            if (this.Locale != null)
            {
                stringBuilder.AppendMetaPropertyContent("og:locale", this.Locale);

                if (this.AlternateLocales != null)
                {
                    foreach (string locale in this.AlternateLocales)
                    {
                        stringBuilder.AppendMetaPropertyContent("og:locale:alternate", locale);
                    }
                }
            }

            if (this.SeeAlso != null)
            {
                foreach (string seeAlso in this.SeeAlso)
                {
                    stringBuilder.AppendMetaPropertyContent("og:see_also", seeAlso);
                }
            }

            if (this.FacebookAdministrators != null)
            {
                foreach (string facebookAdministrator in this.FacebookAdministrators)
                {
                    stringBuilder.AppendMetaPropertyContentIfNotNull("fb:admins", facebookAdministrator);
                }
            }

            stringBuilder.AppendMetaPropertyContentIfNotNull("fb:app_id", this.FacebookApplicationId);
            stringBuilder.AppendMetaPropertyContentIfNotNull("fb:profile_id", this.FacebookProfileId);
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            stringBuilder.AppendMetaPropertyContentIfNotNull("books:author", this.AuthorUrls);
            stringBuilder.AppendMetaPropertyContentIfNotNull("books:genre", this.GenreUrls);
            stringBuilder.AppendMetaPropertyContentIfNotNull("books:initial_release_date", this.InitialReleaseDate);
            stringBuilder.AppendMetaPropertyContentIfNotNull("books:isbn", this.ISBN);
            stringBuilder.AppendMetaPropertyContentIfNotNull("books:language", this.Language);
            stringBuilder.AppendMetaPropertyContentIfNotNull("books:page_count", this.PageCount);

            if (this.Rating != null)
            {
                stringBuilder.AppendMetaPropertyContent("books:rating:value", this.Rating.Value);
                stringBuilder.AppendMetaPropertyContent("books:rating:scale", this.Rating.Scale);
            }

            stringBuilder.AppendMetaPropertyContentIfNotNull("books:release_date", this.ReleaseDate);
            stringBuilder.AppendMetaPropertyContentIfNotNull("books:sample", this.SampleUrl);
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            stringBuilder.AppendMetaPropertyContentIfNotNull("music:creator", this.CreatorUrl);
        }

        /// <summary>
        /// Appends a HTML-encoded string representing this instance to the <paramref name="stringBuilder"/> containing the Open Graph meta tags.
        /// </summary>
        /// <param name="stringBuilder">The string builder.</param>
        public override void ToString(StringBuilder stringBuilder)
        {
            base.ToString(stringBuilder);

            stringBuilder.AppendMetaPropertyContentIfNotNull("article:author", this.AuthorUrls);
            stringBuilder.AppendMetaPropertyContentIfNotNull("article:expiration_time", this.ExpirationTime);
            stringBuilder.AppendMetaPropertyContentIfNotNull("article:modified_time", this.ModifiedTime);
            stringBuilder.AppendMetaPropertyContentIfNotNull("article:published_time", this.PublishedTime);
            stringBuilder.AppendMetaPropertyContentIfNotNull("article:publisher", this.PublisherUrl);
            stringBuilder.AppendMetaPropertyContentIfNotNull("article:section", this.Section);
            stringBuilder.AppendMetaPropertyContentIfNotNull("article:tag", this.Tags);
        }