◆ WriteStartAttribute() [3/6]

override void System.Runtime.Serialization.Json.XmlJsonWriter.WriteStartAttribute	(	string	prefix,
		string	localName,
		string	ns )
inline
Definition at line 719 of file XmlJsonWriter.cs.
    {
        if (IsClosed)
        {
            ThrowClosed();
        }
        if (!string.IsNullOrEmpty(prefix))
        {
            if (!IsWritingNameWithMapping || !(prefix == "xmlns"))
            {
                throw new ArgumentException(System.SR.Format(System.SR.JsonPrefixMustBeNullOrEmpty, prefix), "prefix");
            }
            if (ns != null && ns != "http://www.w3.org/2000/xmlns/")
            {
                throw new ArgumentException(System.SR.Format(System.SR.XmlPrefixBoundToNamespace, "xmlns", "http://www.w3.org/2000/xmlns/", ns), "ns");
            }
        }
        else if (IsWritingNameWithMapping && ns == "http://www.w3.org/2000/xmlns/" && localName != "xmlns")
        {
            prefix = "xmlns";
        }
        if (!string.IsNullOrEmpty(ns))
        {
            if (IsWritingNameWithMapping && ns == "http://www.w3.org/2000/xmlns/")
            {
                prefix = "xmlns";
            }
            else
            {
                if (!string.IsNullOrEmpty(prefix) || !(localName == "xmlns") || !(ns == "http://www.w3.org/2000/xmlns/"))
                {
                    throw new ArgumentException(System.SR.Format(System.SR.JsonNamespaceMustBeEmpty, ns), "ns");
                }
                prefix = "xmlns";
                _isWritingXmlnsAttributeDefaultNs = true;
            }
        }
        if (localName == null)
        {
            throw new ArgumentNullException("localName");
        }
        if (localName.Length == 0)
        {
            throw new ArgumentException(System.SR.JsonInvalidLocalNameEmpty, "localName");
        }
        if (_nodeType != JsonNodeType.Element && !_wroteServerTypeAttribute)
        {
            throw new XmlException(System.SR.JsonAttributeMustHaveElement);
        }
        if (HasOpenAttribute)
        {
            throw new XmlException(System.SR.Format(System.SR.JsonOpenAttributeMustBeClosedFirst, "WriteStartAttribute"));
        }
        if (prefix == "xmlns")
        {
            _isWritingXmlnsAttribute = true;
            return;
        }
        switch (localName)
        {
        case "type":
            if (_dataType != 0)
            {
                throw new XmlException(System.SR.Format(System.SR.JsonAttributeAlreadyWritten, "type"));
            }
            _isWritingDataTypeAttribute = true;
            break;
        case "__type":
            if (_serverTypeValue != null)
            {
                throw new XmlException(System.SR.Format(System.SR.JsonAttributeAlreadyWritten, "__type"));
            }
            if (_dataType != 0 && _dataType != JsonDataType.Object)
            {
                throw new XmlException(System.SR.Format(System.SR.JsonServerTypeSpecifiedForInvalidDataType, "__type", "type", _dataType.ToString().ToLowerInvariant(), "object"));
            }
            _isWritingServerTypeAttribute = true;
            break;
        case "item":
            if (WrittenNameWithMapping)
            {
                throw new XmlException(System.SR.Format(System.SR.JsonAttributeAlreadyWritten, "item"));
            }
            if (!IsWritingNameWithMapping)
            {
                throw new XmlException(System.SR.JsonEndElementNoOpenNodes);
            }
            _nameState |= NameState.IsWritingNameAttribute;
            break;
        default:
            throw new ArgumentException(System.SR.Format(System.SR.JsonUnexpectedAttributeLocalName, localName), "localName");
        }
    }