Question

我有以下C＃代码来解析xml文档：

XDocument.Load(ConfigurationManager.AppSettings["XDocumentLoad"])
    .Root
    .Elements(j + "RegisteredOffenders")
    .ToList()
    .ForEach(element =>
    {
        //build out the xml namespace for the data parse
        var ns = element.GetDefaultNamespace();
        var role = element.Element(ns + "RoleOfPerson");
        var PersonName = role.Element(ns + "PersonName");
        var offender = element.Element(j + "RegisteredOffenderIdentification");
        var id = element.Attribute(s + "id").Value;

        //This is an inner loop that gets all the addresss for a person and writes the info to the temp strings declared above.
        element.Document.Root.Element(se + "SopsOffenderAddressList").Elements(se + "SopsOffenderAddress").Where(a => a.Element(se + "offenderIdRef").Value == id).ToList().ForEach(ad =>
        {
            string aCode = ad.Element(sc + "AddressCategoryCode").Value;
            switch (aCode.ToUpper())
            {
                case "TEMP":
                    string TempAddressCode = ad.Element(sc + "AddressCategoryCode").Value;
                    string TempStreet = ad.Element(ns + "LocationStreet").Element(ns + "StreetFullText").Value;
                    string Tempcity = ad.Element(ns + "LocationCityName").Value;
                    string Tempstate = ad.Element(sc + "LocationUSStateCode").Value;
                    string TempzipOne = ad.Element(ns + "LocationPostalCode").Value;
                    string TempzipTwo = ad.Element(ns + "LocationPostalExtensionCode").Value;
                    TempLocation = string.Format("{0},{1},{2},{3},{4}", TempStreet, Tempcity, TempStreet, TempzipOne, TempzipTwo);
                    break;

                case "PERM":
                    string PermAddressCode = ad.Element(sc + "AddressCategoryCode").Value;
                    string PermStreet = ad.Element(ns + "LocationStreet").Element(ns + "StreetFullText").Value;
                    string Permcity = ad.Element(ns + "LocationCityName").Value;
                    string PermCounty = ad.Element(sc + "LocationNonFLCounty").Value;
                    string Permstate = ad.Element(sc + "LocationUSStateCode").Value;
                    string PermzipOne = ad.Element(ns + "LocationPostalCode").Value;
                    string PermzipTwo = ad.Element(ns + "LocationPostalExtensionCode").Value;
                    PermLocation = string.Format("{0},{1},{2},{3},{4},{5}", PermStreet, Permcity, PermCounty, Permstate, PermzipOne, PermzipTwo);
                    break;

                case "TRANS":
                    string TransAddressCode = ad.Element(sc + "AddressCategoryCode").Value;
                    string TransStreet = ad.Element(ns + "LocationStreet").Element(ns + "StreetFullText").Value;
                    string Transcity = ad.Element(ns + "LocationCityName").Value;
                    string Transstate = ad.Element(sc + "LocationUSStateCode").Value;
                    string TranszipOne = ad.Element(ns + "LocationPostalCode").Value;
                    string TranszipTwo = ad.Element(ns + "LocationPostalExtensionCode").Value;
                    TransLocation = string.Format("{0},{1},{2},{3},{4}", TransStreet, Transcity, TransStreet, TranszipOne, TranszipTwo);
                    break;
            }
        }
    );

我现在需要添加到linq查询以进一步过滤数据。现在正在过滤的数据点是xml的地址部分中的县信息。我尝试过使用此代码，但无法编译。

XDocument.Load(ConfigurationManager.AppSettings["XDocumentLoad"])
    .Root
    .Elements(j + "RegisteredSexOffender")
    .ToList()
    .ForEach(element =>
    {
        //build out the xml namespace for the data parse
        var ns = element.GetDefaultNamespace();
        var role = element.Element(ns + "RoleOfPerson");
        var PersonName = role.Element(ns + "PersonName");
        var offender = element.Element(j + "RegisteredOffenderIdentification");
        var id = element.Attribute(s + "id").Value;

        //This is an inner loop that gets all the addresss for a person and writes the info to the temp strings declared above.
        element.Document.Root.Element(se + "SopsOffenderAddressList").Elements(se + "SopsOffenderAddress").Where(a => a.Element(se + "offenderIdRef").Value == id) && element.Document.Root.Element(se + "SopsOffenderAddressList").Elements(se + "SopsOffenderAddress").Elemetns(sc + "LocationNonFLCounty").Value=="ORANGE").ToList().ForEach(ad =>
        {

正如您所见，我尝试在linq语句中添加一个和子句，但没有运气。

我能够编译这行代码，但现在我没有得到任何记录

                            element.Document.Root.Element(se + "SopsOffenderAddressList").Elements(se + "SopsOffenderAddress").Where(a => a.Element(se + "offenderIdRef").Value == id && a.Element(sc + "LocationNonFLCounty").Value == "Orange").ToList().ForEach(ad =>

Answer 1

您需要学会细分代码。很难像这样阅读单行。

element.Document.Root.Element(se + "SopsOffenderAddressList").Elements(se + "SopsOffenderAddress").Where(a => a.Element(se + "offenderIdRef").Value == id).ToList().ForEach(ad =>
// this line has 334 characters...
element.Document.Root.Element(se + "SopsOffenderAddressList").Elements(se + "SopsOffenderAddress").Where(a => a.Element(se + "offenderIdRef").Value == id) && element.Document.Root.Element(se + "SopsOffenderAddressList").Elements(se + "SopsOffenderAddress").Elemetns(sc + "LocationNonFLCounty").Value=="ORANGE").ToList().ForEach(ad =>

这是你试图修改的第二行：

element.Document.Root
    .Element(se + "SopsOffenderAddressList")
    .Elements(se + "SopsOffenderAddress")
    .Where(a => a.Element(se + "offenderIdRef").Value == id)
&& // this is not how you 'add' another 'filter'(where clause)
element.Document.Root
    .Element(se + "SopsOffenderAddressList")
    .Elements(se + "SopsOffenderAddress")
    .Elemetns(sc + "LocationNonFLCounty").Value=="ORANGE") // I think you mean to compare a *single* element to "ORANGE"

    .ToList().ForEach(ad =>

您需要链接where子句或将它们组合在同一where子句中：

element.Document.Root
    .Element(se + "SopsOffenderAddressList")
    .Elements(se + "SopsOffenderAddress")

    // chaining (pick one)
    .Where(a => a.Element(se + "offenderIdRef").Value == id)
    .Where(a => a.Element(sc + "LocationNonFLCounty").Value == "ORANGE")

    // combined (pick one)
    .Where(a =>
        a.Element(se + "offenderIdRef").Value == id && 
        a.Element(sc + "LocationNonFLCounty").Value == "ORANGE")

    .ToList().ForEach(ad =>

如何向此XML添加其他过滤器

1 个答案: