Linq To Xml 在不知道确切结构的情况下搜索 XML

Question

我将如何解析以下内容以获取 sql 消息 .Net SqlClient Data Provider？

我正在尝试使用 Linq to xml 来完成此操作，但我运气不佳。 xml 是递归的，所以我无法确定消息将出现在什么级别

有什么想法吗？

谢谢

<detail>
    <ErrorCode xmlns="http://www.microsoft.com/sql/reportingservices">rsProcessingAborted</ErrorCode>
    <HttpStatus xmlns="http://www.microsoft.com/sql/reportingservices">400</HttpStatus>
    <Message xmlns="http://www.microsoft.com/sql/reportingservices">An error has occurred during report processing.</Message>
    <HelpLink xmlns="http://www.microsoft.com/sql/reportingservices">http://go.microsoft.com/fwlink/?LinkId=20476&amp;EvtSrc=Microsoft.ReportingServices.Diagnostics.Utilities.ErrorStrings&amp;EvtID=rsProcessingAborted&amp;ProdName=Microsoft%20SQL%20Server%20Reporting%20Services&amp;ProdVer=10.50.1600.1</HelpLink>
    <ProductName xmlns="http://www.microsoft.com/sql/reportingservices">Microsoft SQL Server Reporting Services</ProductName>
    <ProductVersion xmlns="http://www.microsoft.com/sql/reportingservices">10.50.1600.1</ProductVersion>
    <ProductLocaleId xmlns="http://www.microsoft.com/sql/reportingservices">1033</ProductLocaleId>
    <OperatingSystem xmlns="http://www.microsoft.com/sql/reportingservices">OsIndependent</OperatingSystem>
    <CountryLocaleId xmlns="http://www.microsoft.com/sql/reportingservices">1033</CountryLocaleId>
    <MoreInformation xmlns="http://www.microsoft.com/sql/reportingservices">

        <Source>Microsoft.ReportingServices.ProcessingCore</Source>
        <Message msrs:ErrorCode="rsProcessingAborted" msrs:HelpLink="http://go.microsoft.com/fwlink/?LinkId=20476&amp;EvtSrc=Microsoft.ReportingServices.Diagnostics.Utilities.ErrorStrings&amp;EvtID=rsProcessingAborted&amp;ProdName=Microsoft%20SQL%20Server%20Reporting%20Services&amp;ProdVer=10.50.1600.1" xmlns:msrs="http://www.microsoft.com/sql/reportingservices">An error has occurred during report processing.</Message>
        <MoreInformation>
            <Source>Microsoft.ReportingServices.ProcessingCore</Source>
            <Message msrs:ErrorCode="rsErrorReadingNextDataRow" msrs:HelpLink="http://go.microsoft.com/fwlink/?LinkId=20476&amp;EvtSrc=Microsoft.ReportingServices.Diagnostics.Utilities.ErrorStrings&amp;EvtID=rsErrorReadingNextDataRow&amp;ProdName=Microsoft%20SQL%20Server%20Reporting%20Services&amp;ProdVer=10.50.1600.1" xmlns:msrs="http://www.microsoft.com/sql/reportingservices">Cannot read the next data row for the dataset DD_Inventory.</Message>
            <MoreInformation>
                <Source>.Net SqlClient Data Provider</Source>
                <Message>Conversion failed when converting the nvarchar value 'h' to data type int.</Message>
            </MoreInformation>
        </MoreInformation>
    </MoreInformation>
    <Warnings xmlns="http://www.microsoft.com/sql/reportingservices" />
</detail>

Answer 1

var doc = XDocument.Parse(xml);

XNamespace ns = "http://www.microsoft.com/sql/reportingservices";

string message = (from info in doc.Descendants(ns + "MoreInformation")
                  where info.Element(ns + "MoreInformation") == null
                  select (string)info.Element(ns + "Message")).Single();

获取整个文档中名为 MoreInformation 的所有元素，仅获取那些没有嵌套更多 MoreInformation 的元素。对于他们，请选择消息。最后，确保只有一个结果。