Question

I am creating a XML document in c#.

Its all coming together now but for some reason i keep getting tis error.

Here is my code:

  FileStream Slide2XmlStream = new FileStream(slide2Xml, FileMode.Create, FileAccess.Write);
        XmlWriter slide2XmlWriter = null;

        try
        {
            XmlWriterSettings contentTypesSettings = new XmlWriterSettings();
            contentTypesSettings.Indent = true;
            slide2XmlWriter = XmlWriter.Create(Slide2XmlStream, contentTypesSettings);

            slide2XmlWriter.WriteStartDocument(true);
            slide2XmlWriter.WriteStartElement( "p", "sld","http://schemas.openxmlformats.org/presentationml/2006/main" );
            slide2XmlWriter.WriteAttributeString("r", "http://schemas.openxmlformats.org/officeDocument/2006/relationships");
            slide2XmlWriter.WriteAttributeString( "a","http://schemas.openxmlformats.org/drawingml/2006/main");

            slide2XmlWriter.WriteStartElement( "p", "cSld", null);

            slide2XmlWriter.WriteStartElement( "p", "spTree", null );
            slide2XmlWriter.WriteStartElement( "p", "nvGrpSpPr", null );
            slide2XmlWriter.WriteStartElement( "p", "cNvpr", null );
            slide2XmlWriter.WriteAttributeString("name", "");
            slide2XmlWriter.WriteAttributeString("id", "1");
            slide2XmlWriter.WriteEndElement();

            slide2XmlWriter.WriteStartElement( "p", "cNvGrpSpPr", null );
            slide2XmlWriter.WriteEndElement();

            slide2XmlWriter.WriteStartElement( "p", "nvPr", null );
            slide2XmlWriter.WriteEndElement();
            slide2XmlWriter.WriteEndElement();

            slide2XmlWriter.WriteStartElement( "p", "grpSpPr", null );
            slide2XmlWriter.WriteStartElement( "a", "xfrm", null );
            slide2XmlWriter.WriteStartElement( "a", "off", null );
            slide2XmlWriter.WriteAttributeString("y", "0");
            slide2XmlWriter.WriteAttributeString("x", "0");
            slide2XmlWriter.WriteEndElement();

The error keeps appearing on the “a” prefix on the start of the method.
Any help will really be appreaciated.

Answer 1

I have fixed it. I needed to allow the xmlns prefix and allow the string value to be null:

slide2XmlWriter.WriteAttributeString("xmlns","a",null,"http://schemas.openxmlformats.org/drawingml/2006/main");