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Add xmlns attribute to root element

I have a C # program to generate an RDL file. To show a report in Reporting Services. I am using Linq for Xml to create Xml.

When I try to add XAttribute to the xmlns report element , I encounter several problems.

I am testing the following methods:

the first:

        XDocument d = new XDocument(
           new XDeclaration("1.0", "utf-8", "yes"),
           new XElement("Report",
               new XAttribute(XNamespace.Xmlns + "rd", "http://schemas.microsoft.com/SQLServer/reporting/reportdesigner"),
               new XAttribute(XNamespace.Xmlns + "cl", "http://schemas.microsoft.com/sqlserver/reporting/2010/01/componentdefinition"),
               new XAttribute("xmlns", "http://schemas.microsoft.com/sqlserver/reporting/2010/01/reportdefinition"),
                   new XElement("DataSources", ""),
                   new XElement("DataSets", ""),
                   new XElement("ReportSections",

this is part of my code showing how to generate xml:

second:

XNamespace reportDef = "http://schemas.microsoft.com/sqlserver/reporting/2010/01/reportdefinition";
        XDocument d = new XDocument(
           new XDeclaration("1.0", "utf-8", "yes"),
           new XElement(reportDef + "Report",
               new XAttribute(XNamespace.Xmlns + "rd", "http://schemas.microsoft.com/SQLServer/reporting/reportdesigner"),
               new XAttribute(XNamespace.Xmlns + "cl", "http://schemas.microsoft.com/sqlserver/reporting/2010/01/componentdefinition"),
                   new XElement("DataSources", ""),
                   new XElement("DataSets", ""),
                   new XElement("ReportSections",...

The first method returns an error, and the second method adds the xmlns attribute to all child nodes.

I want this format:

<Report xmlns="http://schemas.microsoft.com/sqlserver/reporting/2010/01/reportdefinition">
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2 answers

XNamespace, (#) (LINQ to XML)

XNamespace reportDef = "http://schemas.microsoft.com/sqlserver/reporting/2010/01/reportdefinition";
XElement root = new XElement(reportDef + "Report",
    new XElement(reportDef + "Child", "child content"));

.

, xmlns

XElement xe = new XElement(reportDef + "Report",
    new XAttribute("xmlns", "http://schemas.microsoft.com/sqlserver/reporting/2010/01/reportdefinition"),
    new XElement(reportDef + "Child", "child content"));
+4

@Filburt this, xmlns . XNamespace.

, . . , xmlns , , .

  • , XNamespace (. ns1) . : new XElement(ns1 + "Report"); <Report> ns1 .

  • , . , new XAttribute(XNamespace.Xmlns + "ns2", ns2) <Report> ns2. , (new XElement(ns2+"DataSources")) ns2, . . .

        StringBuilder sb = new StringBuilder();
    XmlWriterSettings xws = new XmlWriterSettings();
    xws.OmitXmlDeclaration = true;
    xws.Indent = true;

    using (XmlWriter xw = XmlWriter.Create(sb, xws))
    {   
        XNamespace ns1 = "http://schemas.microsoft.com/sqlserver/reporting/2010/01/reportdefinition";
        XNamespace ns2 = "http://schemas.microsoft.com/SQLServer/reporting/reportdesigner";
        XNamespace ns3 = "http://schemas.microsoft.com/sqlserver/reporting/2010/01/componentdefinition";
        XDocument doc = new XDocument(new XDeclaration("1.0", "utf-8", "yes"));
        XElement reportElement = new XElement(ns1 + "Report",
            new XAttribute(XNamespace.Xmlns + "ns2", ns2),
            new XAttribute(XNamespace.Xmlns + "ns3", ns3));
        doc.Add(reportElement);

        reportElement.Add(new XElement(ns2+"DataSources"));
        reportElement.Add(new XElement(ns3+"DataSets"));
        reportElement.Add(new XElement(ns1+"ReportSections"));

        doc.WriteTo(xw);
    }

    System.Diagnostics.Debug.Write(sb.ToString());
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