Add xmlns attribute to root element

Question

I have C# Program to Generate RDL File For whitch Show report in Reporting services. I use Linq to Xml to generate Xml.

When I try to add xmlns XAttribute to Report Element, I encounter several problems.

I test following methods:

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 a part of my code witch show how 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 second method adds attribute xmlns to all child node.

I want this format:

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

Answer 1

Try to add you child nodes using the XNamespace as described in How to: Create a Document with Namespaces (C#) (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"));

This should give you the desired result.

You can also add a default namespace by adding an xmlns attribute

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