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我正在使用 C# 4.5/Visual Studio 2012 尝试将 XML 文件加载到数据集。我在这里阅读了说明：

http://msdn.microsoft.com/en-us/library/fx29c3yd.aspx

我正在加载一个如下所示的 XML 文件：

<?xml version="1.0" encoding="utf-8" ?>

<UnitTestDataSet xmlns="https://rebuildinghomes.codeplex.com/" 
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
        xsi:schemaLocation="https://rebuildinghomes.codeplex.com/ UnitTestLoadData.xsd">
  <Person>
    <PersonId>1111</PersonId>
    <FirstName>Unit</FirstName>
    <LastName>Tester</LastName>
  </Person>
</UnitTestDataSet>

使用这样的架构：

<?xml version="1.0" encoding="utf-8" ?>

<xs:schema id="RebuildingUnitTestData"
            targetNamespace="https://rebuildinghomes.codeplex.com/"
            xmlns:u="https://rebuildinghomes.codeplex.com/"
            elementFormDefault="qualified"
            xmlns:xs="http://www.w3.org/2001/XMLSchema"
            xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
  <xs:complexType name="PersonType">
    <xs:sequence>
      <xs:element name="PersonId" type="xs:int"
                   minOccurs="1" maxOccurs="1" />
      <xs:element name="FirstName" type="xs:string"
                   minOccurs="1" maxOccurs="1" />
      <xs:element name="LastName" type="xs:string"
                   minOccurs="1" maxOccurs="1" />
    </xs:sequence>
  </xs:complexType>
</xs:schema>

使用以下 C# 代码：

        //Load init/expected
        DataSet init = new DataSet();

        init.ReadXmlSchema("RebuildingModel/Data/UnitTestLoadData.xsd");

        init.ReadXml("RebuildingModel/Data/PersonUnitTest.xml", XmlReadMode.ReadSchema);

但是，当我在调试器中查看“init”时，DataSet 是空的。我究竟做错了什么？

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3 回答 3

1

可悲的是，您的代码片段似乎可以在我的机器上运行。您确定在 init.ReadXml() 语句执行后检查 init吗？

在下面的 Visual Studio 即时窗口中查看我的输出：

ds.Tables[0]
{Person}
    base {System.ComponentModel.MarshalByValueComponent}: {Person}
    CaseSensitive: false
    ChildRelations: {System.Data.DataRelationCollection.DataTableRelationCollection}
    Columns: {System.Data.DataColumnCollection}
    Constraints: {System.Data.ConstraintCollection}
    DataSet: {System.Data.DataSet}
    DefaultView: {System.Data.DataView}
    DisplayExpression: ""
    ExtendedProperties: Count = 0
    HasErrors: false
    IsInitialized: true
    Locale: {en-US}
    MinimumCapacity: 50
    Namespace: "https://rebuildinghomes.codeplex.com/"
    ParentRelations: {System.Data.DataRelationCollection.DataTableRelationCollection}
    Prefix: ""
    PrimaryKey: {System.Data.DataColumn[0]}
    RemotingFormat: Xml
    Rows: {System.Data.DataRowCollection}
    Site: null
    TableName: "Person"
ds.Tables[0].Rows
{System.Data.DataRowCollection}
    base {System.Data.InternalDataCollectionBase}: {System.Data.DataRowCollection}
    Count: 1

根据您的 XML，我的 DataSet 填充有一个包含单行的表。

于 2013-09-25T19:27:08.627 回答
1

我终于想通了。

架构现在看起来像这样：

<?xml version="1.0" encoding="utf-8"?>
<xs:schema id="UnitTestDataSet" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" xmlns:msprop="urn:schemas-microsoft-com:xml-msprop">
  <xs:annotation>
    <xs:appinfo source="urn:schemas-microsoft-com:xml-msdatasource">
      <DataSource DefaultConnectionIndex="0" FunctionsComponentName="QueriesTableAdapter" Modifier="AutoLayout, AnsiClass, Class, Public" SchemaSerializationMode="IncludeSchema" xmlns="urn:schemas-microsoft-com:xml-msdatasource">
        <Connections />
        <Tables />
        <Sources />
      </DataSource>
    </xs:appinfo>
  </xs:annotation>
  <xs:element name="UnitTestDataSet" msdata:IsDataSet="true" msdata:UseCurrentLocale="true" msprop:Generator_DataSetName="UnitTestDataSet" msprop:Generator_UserDSName="UnitTestDataSet">
    <xs:complexType>
      <xs:choice minOccurs="0" maxOccurs="unbounded">
        <xs:element name="Person" msprop:Generator_TableClassName="PersonDataTable" msprop:Generator_TableVarName="tablePerson" msprop:Generator_TablePropName="Person" msprop:Generator_RowDeletingName="PersonRowDeleting" msprop:Generator_RowChangingName="PersonRowChanging" msprop:Generator_RowEvHandlerName="PersonRowChangeEventHandler" msprop:Generator_RowDeletedName="PersonRowDeleted" msprop:Generator_UserTableName="Person" msprop:Generator_RowChangedName="PersonRowChanged" msprop:Generator_RowEvArgName="PersonRowChangeEvent" msprop:Generator_RowClassName="PersonRow">
          <xs:complexType>
            <xs:sequence>
              <xs:element name="PersonId" msprop:Generator_ColumnVarNameInTable="columnPersonId" msprop:Generator_ColumnPropNameInRow="PersonId" msprop:Generator_ColumnPropNameInTable="PersonIdColumn" msprop:Generator_UserColumnName="PersonId" type="xs:int" />
              <xs:element name="FirstName" msprop:Generator_ColumnVarNameInTable="columnFirstName" msprop:Generator_ColumnPropNameInRow="FirstName" msprop:Generator_ColumnPropNameInTable="FirstNameColumn" msprop:Generator_UserColumnName="FirstName" type="xs:string" />
              <xs:element name="LastName" msprop:Generator_ColumnVarNameInTable="columnLastName" msprop:Generator_ColumnPropNameInRow="LastName" msprop:Generator_ColumnPropNameInTable="LastNameColumn" msprop:Generator_UserColumnName="LastName" type="xs:string" />
              <xs:element name="HomePhoneNbr" msprop:Generator_ColumnVarNameInTable="columnHomePhoneNbr" msprop:Generator_ColumnPropNameInRow="HomePhoneNbr" msprop:Generator_ColumnPropNameInTable="HomePhoneNbrColumn" msprop:Generator_UserColumnName="HomePhoneNbr" type="xs:string" minOccurs="0" />
              <xs:element name="CellPhoneNbr" msprop:Generator_ColumnVarNameInTable="columnCellPhoneNbr" msprop:Generator_ColumnPropNameInRow="CellPhoneNbr" msprop:Generator_ColumnPropNameInTable="CellPhoneNbrColumn" msprop:Generator_UserColumnName="CellPhoneNbr" type="xs:string" minOccurs="0" />
              <xs:element name="StreetAddress" msprop:Generator_ColumnVarNameInTable="columnStreetAddress" msprop:Generator_ColumnPropNameInRow="StreetAddress" msprop:Generator_ColumnPropNameInTable="StreetAddressColumn" msprop:Generator_UserColumnName="StreetAddress" type="xs:string" minOccurs="0" />
              <xs:element name="AptNbr" msprop:Generator_ColumnVarNameInTable="columnAptNbr" msprop:Generator_ColumnPropNameInRow="AptNbr" msprop:Generator_ColumnPropNameInTable="AptNbrColumn" msprop:Generator_UserColumnName="AptNbr" type="xs:string" minOccurs="0" />
              <xs:element name="City" msprop:Generator_ColumnVarNameInTable="columnCity" msprop:Generator_ColumnPropNameInRow="City" msprop:Generator_ColumnPropNameInTable="CityColumn" msprop:Generator_UserColumnName="City" type="xs:string" minOccurs="0" />
              <xs:element name="County" msprop:Generator_ColumnVarNameInTable="columnCounty" msprop:Generator_ColumnPropNameInRow="County" msprop:Generator_ColumnPropNameInTable="CountyColumn" msprop:Generator_UserColumnName="County" type="xs:string" minOccurs="0" />
              <xs:element name="StateProvCd" msprop:Generator_ColumnVarNameInTable="columnStateProvCd" msprop:Generator_ColumnPropNameInRow="StateProvCd" msprop:Generator_ColumnPropNameInTable="StateProvCdColumn" msprop:Generator_UserColumnName="StateProvCd" type="xs:string" minOccurs="0" />
              <xs:element name="PostalCode" msprop:Generator_ColumnVarNameInTable="columnPostalCode" msprop:Generator_ColumnPropNameInRow="PostalCode" msprop:Generator_ColumnPropNameInTable="PostalCodeColumn" msprop:Generator_UserColumnName="PostalCode" type="xs:string" minOccurs="0" />
              <xs:element name="CountryCode" msprop:Generator_ColumnVarNameInTable="columnCountryCode" msprop:Generator_ColumnPropNameInRow="CountryCode" msprop:Generator_ColumnPropNameInTable="CountryCodeColumn" msprop:Generator_UserColumnName="CountryCode" type="xs:string" minOccurs="0" />
              <xs:element name="NumberOfYearsAtAddr" msprop:Generator_ColumnVarNameInTable="columnNumberOfYearsAtAddr" msprop:Generator_ColumnPropNameInRow="NumberOfYearsAtAddr" msprop:Generator_ColumnPropNameInTable="NumberOfYearsAtAddrColumn" msprop:Generator_UserColumnName="NumberOfYearsAtAddr" type="xs:int" minOccurs="0" />
              <xs:element name="EmailAddress" msprop:Generator_ColumnVarNameInTable="columnEmailAddress" msprop:Generator_ColumnPropNameInRow="EmailAddress" msprop:Generator_ColumnPropNameInTable="EmailAddressColumn" msprop:Generator_UserColumnName="EmailAddress" type="xs:string" minOccurs="0" />
              <xs:element name="GenderCode" msprop:Generator_ColumnVarNameInTable="columnGenderCode" msprop:Generator_ColumnPropNameInRow="GenderCode" msprop:Generator_ColumnPropNameInTable="GenderCodeColumn" msprop:Generator_UserColumnName="GenderCode" type="xs:string" minOccurs="0" />
              <xs:element name="EthnicityCode" msprop:Generator_ColumnVarNameInTable="columnEthnicityCode" msprop:Generator_ColumnPropNameInRow="EthnicityCode" msprop:Generator_ColumnPropNameInTable="EthnicityCodeColumn" msprop:Generator_UserColumnName="EthnicityCode" type="xs:int" minOccurs="0" />
              <xs:element name="BirthDate" msprop:Generator_ColumnVarNameInTable="columnBirthDate" msprop:Generator_ColumnPropNameInRow="BirthDate" msprop:Generator_ColumnPropNameInTable="BirthDateColumn" msprop:Generator_UserColumnName="BirthDate" type="xs:date" minOccurs="0" />
              <xs:element name="ResidentStatus" msprop:Generator_ColumnVarNameInTable="columnResidentStatus" msprop:Generator_ColumnPropNameInRow="ResidentStatus" msprop:Generator_ColumnPropNameInTable="ResidentStatusColumn" msprop:Generator_UserColumnName="ResidentStatus" type="xs:int" minOccurs="0" />
            </xs:sequence>
          </xs:complexType>
        </xs:element>
      </xs:choice>
    </xs:complexType>
    <xs:unique name="Constraint1" msdata:PrimaryKey="true">
      <xs:selector xpath=".//Person" />
      <xs:field xpath="PersonId" />
    </xs:unique>
  </xs:element>
</xs:schema>

The big thing that changed, as you'll notice, is all of the extraneous junk that Visual Studio adds in. Apparently, .NET needs some of this to load the data properly, most notably the primary key annotation. So the moral of the story: if you're going to load a DataSet from XML, create a schema through Visual Studio or be prepared to run it through XSLT to add all this stuff, or the results will be unpredictable, at best.

于 2014-01-20T19:13:19.327 回答
0

可能是以下空间：

xsi:schemaLocation="https://rebuildinghomes.codeplex.com/ UnitTestLoadData.xsd">

从你的xml文件？

于 2013-09-25T19:24:02.843 回答