Add ZUGFeRD parsing and invoice storage support
Enhanced `ZugferdInvoice` model with default string values to prevent nulls. Updated `Upload.cshtml` to display parsed invoice data. Refactored `Upload.cshtml.cs` to handle ZUGFeRD XML parsing and database storage. Introduced `ImportedInvoice` property and buffered file processing with `MemoryStream`. Extended `ZugferdParserService` to support ZUGFeRD v1, v1.0 FeRD, and v2/Factur-X. Added version-specific parsing methods and namespaces. Improved date and decimal parsing for robustness. Added database migration (`20260522084606_InitialCreate`) to define `ZugferdInvoices` table. Updated migration snapshot to reflect schema changes. Fixed localization issue in `Upload.cshtml.cs` error message.
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OlgunR
@@ -5,20 +5,77 @@ using System.Xml.Linq;
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public class ZugferdParserService
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{
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// ZUGFeRD v2 / Factur-X Namespaces
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private static readonly XNamespace Ram = "urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100";
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// ZUGFeRD v1 Namespace
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private static readonly XNamespace RsmV1 = "urn:un:unece:uncefact:data:standard:CBFBUY:5";
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private static readonly XNamespace Rsm = "urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100";
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// ZUGFeRD v2 / Factur-X Namespaces
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private static readonly XNamespace RsmV2 = "urn:un:unece:uncefact:data:standard:CrossIndustryInvoice:100";
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private static readonly XNamespace Ram = "urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100";
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private static readonly XNamespace Udt = "urn:un:unece:uncefact:data:standard:UnqualifiedDataType:100";
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// ZUGFeRD v1.0 FeRD (CrossIndustryDocument)
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private static readonly XNamespace RsmFerd1 = "urn:ferd:CrossIndustryDocument:invoice:1p0";
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private static readonly XNamespace RamV12 = "urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:12";
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private static readonly XNamespace UdtV15 = "urn:un:unece:uncefact:data:standard:UnqualifiedDataType:15";
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// NACHHER:
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public ZugferdInvoice Parse(string xml)
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{
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var doc = XDocument.Parse(xml);
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var root = doc.Root!;
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var header = root.Element(Rsm + "ExchangedDocument");
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var trade = root.Element(Rsm + "SupplyChainTradeTransaction");
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if (root.Name.Namespace == RsmV1) return ParseV1(root, xml);
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if (root.Name.Namespace == RsmFerd1) return ParseV1Ferd(root, xml);
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return ParseV2(root, xml);
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}
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// ── ZUGFeRD v1 (CBFBUY:5) ────────────────────────────────────────────────
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private static ZugferdInvoice ParseV1(XElement root, string xml)
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{
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// In v1 haben Kind-Elemente KEINEN Namespace-Präfix
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var ns = XNamespace.None;
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var rsm = RsmV1;
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var header = root.Element(rsm + "HeaderExchangedDocument");
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var trade = root.Element(rsm + "SpecifiedSupplyChainTradeTransaction");
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var agreement = trade?.Element(ns + "ApplicableSupplyChainTradeAgreement");
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var settlement = trade?.Element(ns + "ApplicableSupplyChainTradeSettlement");
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var seller = agreement?.Element(ns + "SellerTradeParty");
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var buyer = agreement?.Element(ns + "BuyerTradeParty");
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var summation = settlement?.Element(ns + "SpecifiedTradeSettlementMonetarySummation");
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var payment = settlement?.Element(ns + "SpecifiedTradeSettlementPaymentMeans");
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// SellerTaxId: das SpecifiedTaxRegistration mit schemeID="VA" nehmen
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var sellerTaxId = seller?
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.Elements(ns + "SpecifiedTaxRegistration")
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.FirstOrDefault(e => (string?)e.Element(ns + "ID")?.Attribute("schemeID") == "VA")
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?.Element(ns + "ID")?.Value ?? string.Empty;
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return new ZugferdInvoice
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{
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InvoiceNumber = header?.Element(ns + "ID")?.Value ?? string.Empty,
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InvoiceDate = ParseDate(header?.Element(ns + "IssueDateTime")?.Value),
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SellerName = seller?.Element(ns + "Name")?.Value ?? string.Empty,
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SellerTaxId = sellerTaxId,
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BuyerName = buyer?.Element(ns + "Name")?.Value ?? string.Empty,
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CurrencyCode = settlement?.Element(ns + "InvoiceCurrencyCode")?.Value ?? "EUR",
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TotalAmount = ParseDecimal(summation?.Element(ns + "GrandTotalAmount")?.Value),
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TaxAmount = ParseDecimal(summation?.Element(ns + "TaxTotalAmount")?.Value),
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Iban = payment?.Element(ns + "PayeePartyCreditorFinancialAccount")
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?.Element(ns + "IBANID")?.Value ?? string.Empty,
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RawXml = xml,
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ImportedAt = DateTime.UtcNow
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};
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}
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// ── ZUGFeRD v2 / Factur-X ────────────────────────────────────────────────
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private static ZugferdInvoice ParseV2(XElement root, string xml)
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{
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var header = root.Element(RsmV2 + "ExchangedDocument");
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var trade = root.Element(RsmV2 + "SupplyChainTradeTransaction");
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var agreement = trade?.Element(Ram + "ApplicableHeaderTradeAgreement");
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var settlement = trade?.Element(Ram + "ApplicableHeaderTradeSettlement");
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@@ -27,32 +84,73 @@ public class ZugferdParserService
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InvoiceNumber = header?.Element(Ram + "ID")?.Value ?? string.Empty,
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InvoiceDate = ParseDate(header?.Element(Ram + "IssueDateTime")
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?.Element(Udt + "DateTimeString")?.Value),
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SellerName = agreement?.Element(Ram + "SellerTradeParty")
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?.Element(Ram + "Name")?.Value ?? string.Empty,
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?.Element(Ram + "Name")?.Value ?? string.Empty,
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SellerTaxId = agreement?.Element(Ram + "SellerTradeParty")
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?.Element(Ram + "SpecifiedTaxRegistration")
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?.Element(Ram + "ID")?.Value ?? string.Empty,
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?.Element(Ram + "SpecifiedTaxRegistration")
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?.Element(Ram + "ID")?.Value ?? string.Empty,
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BuyerName = agreement?.Element(Ram + "BuyerTradeParty")
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?.Element(Ram + "Name")?.Value ?? string.Empty,
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?.Element(Ram + "Name")?.Value ?? string.Empty,
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CurrencyCode = settlement?.Element(Ram + "InvoiceCurrencyCode")?.Value ?? "EUR",
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TotalAmount = ParseDecimal(settlement?.Element(Ram + "SpecifiedTradeSettlementHeaderMonetarySummation")
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?.Element(Ram + "GrandTotalAmount")?.Value),
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TaxAmount = ParseDecimal(settlement?.Element(Ram + "SpecifiedTradeSettlementHeaderMonetarySummation")
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?.Element(Ram + "TaxTotalAmount")?.Value),
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TotalAmount = ParseDecimal(settlement
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?.Element(Ram + "SpecifiedTradeSettlementHeaderMonetarySummation")
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?.Element(Ram + "GrandTotalAmount")?.Value),
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TaxAmount = ParseDecimal(settlement
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?.Element(Ram + "SpecifiedTradeSettlementHeaderMonetarySummation")
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?.Element(Ram + "TaxTotalAmount")?.Value),
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Iban = settlement?.Element(Ram + "SpecifiedTradeSettlementPaymentMeans")
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?.Element(Ram + "PayeePartyCreditorFinancialAccount")
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?.Element(Ram + "IBANID")?.Value ?? string.Empty,
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?.Element(Ram + "PayeePartyCreditorFinancialAccount")
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?.Element(Ram + "IBANID")?.Value ?? string.Empty,
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RawXml = xml,
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ImportedAt = DateTime.UtcNow
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};
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}
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// ── ZUGFeRD v1.0 FeRD (CrossIndustryDocument:invoice:1p0) ───────────────────
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private static ZugferdInvoice ParseV1Ferd(XElement root, string xml)
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{
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var rsm = RsmFerd1;
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var ram = RamV12;
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var udt = UdtV15;
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var header = root.Element(rsm + "HeaderExchangedDocument");
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var trade = root.Element(rsm + "SpecifiedSupplyChainTradeTransaction");
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var agreement = trade?.Element(ram + "ApplicableSupplyChainTradeAgreement");
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var settlement = trade?.Element(ram + "ApplicableSupplyChainTradeSettlement");
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var seller = agreement?.Element(ram + "SellerTradeParty");
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var buyer = agreement?.Element(ram + "BuyerTradeParty");
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var summation = settlement?.Element(ram + "SpecifiedTradeSettlementMonetarySummation");
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var payment = settlement?.Element(ram + "SpecifiedTradeSettlementPaymentMeans");
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var sellerTaxId = seller?
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.Elements(ram + "SpecifiedTaxRegistration")
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.FirstOrDefault(e => (string?)e.Element(ram + "ID")?.Attribute("schemeID") == "VA")
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?.Element(ram + "ID")?.Value ?? string.Empty;
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return new ZugferdInvoice
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{
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InvoiceNumber = header?.Element(ram + "ID")?.Value ?? string.Empty,
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InvoiceDate = ParseDate(header?.Element(ram + "IssueDateTime")
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?.Element(udt + "DateTimeString")?.Value),
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SellerName = seller?.Element(ram + "Name")?.Value ?? string.Empty,
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SellerTaxId = sellerTaxId,
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BuyerName = buyer?.Element(ram + "Name")?.Value ?? string.Empty,
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CurrencyCode = settlement?.Element(ram + "InvoiceCurrencyCode")?.Value ?? "EUR",
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TotalAmount = ParseDecimal(summation?.Element(ram + "GrandTotalAmount")?.Value),
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TaxAmount = ParseDecimal(summation?.Element(ram + "TaxTotalAmount")?.Value),
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Iban = payment?.Element(ram + "PayeePartyCreditorFinancialAccount")
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?.Element(ram + "IBANID")?.Value ?? string.Empty,
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RawXml = xml,
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ImportedAt = DateTime.UtcNow
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};
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}
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// ── Hilfsmethoden ────────────────────────────────────────────────────────
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private static DateTime ParseDate(string? value)
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{
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if (string.IsNullOrWhiteSpace(value)) return DateTime.MinValue;
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return DateTime.TryParseExact(value, "yyyyMMdd",
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return DateTime.TryParseExact(value.Trim(), "yyyyMMdd",
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System.Globalization.CultureInfo.InvariantCulture,
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System.Globalization.DateTimeStyles.None, out var dt) ? dt : DateTime.MinValue;
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}
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