Export (0) Print
Expand All

XmlWriter.WriteStartElement Method (String, String, String)

When overridden in a derived class, writes the specified start tag and associates it with the given namespace and prefix.

Namespace:  System.Xml
Assembly:  System.Xml (in System.Xml.dll)

abstract WriteStartElement : 
        prefix:string * 
        localName:string * 
        ns:string -> unit

Parameters

prefix
Type: System.String

The namespace prefix of the element.

localName
Type: System.String

The local name of the element.

ns
Type: System.String

The namespace URI to associate with the element.

ExceptionCondition
InvalidOperationException

The writer is closed.

EncoderFallbackException

There is a character in the buffer that is a valid XML character but is not valid for the output encoding. For example, if the output encoding is ASCII, you should only use characters from the range of 0 to 127 for element and attribute names. The invalid character might be in the argument of this method or in an argument of previous methods that were writing to the buffer. Such characters are escaped by character entity references when possible (for example, in text nodes or attribute values). However, the character entity reference is not allowed in element and attribute names, comments, processing instructions, or CDATA sections.

InvalidOperationException

An XmlWriter method was called before a previous asynchronous operation finished. In this case, InvalidOperationException is thrown with the message “An asynchronous operation is already in progress.”

For the asynchronous version of this method, see WriteStartElementAsync.

The following example writes out an XML fragment.

No code example is currently available or this language may not be supported.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Portable Class Library

Supported in: Portable Class Library

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
Show:
© 2015 Microsoft