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C#中使用XMLReader读取XML文件

2009-06-09 18:05 609 查看
class Test
    {
        public static void Main(string[] args)
        {
            string path = "f://xmldoc//xmlrule.xml";
           

            XmlReader reader = null;
            try
            {
                // 创建XmlReaderSettings对象
                XmlReaderSettings settings = new XmlReaderSettings();
                // 设置XmlReaderSettings对象的属性
                settings.ProhibitDtd = false;
                // 使用XmlReaderSettings对象来创建XmlReader对象
                reader = XmlReader.Create(path, settings);

                ReadXml(reader);
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }
            finally
            {
                if (reader != null)
                    reader.Close();
            }
        }

        private static void ReadXml(XmlReader reader)
        {
            try
            {
                // 解析文件，并显示每一个节点
                while (reader.Read())
                {
                    switch (reader.NodeType)
                    {
                        case XmlNodeType.Element:
                            if (reader.IsEmptyElement) // 空元素？
                            {
                                Console.WriteLine("<{0}/>", reader.Name);
                            }
                            else
                            {
                                Console.Write("<{0}", reader.Name);
                                if (reader.HasAttributes)   // 属性？
                                {
                                    while (reader.MoveToNextAttribute())
                                    {
                                        Console.Write(" {0}=/"{1}/"", reader.Name, reader.Value);
                                    }
                                }
                                Console.WriteLine(">", reader.Name);
                            }
                            break;
                        case XmlNodeType.Text:
                            Console.WriteLine(reader.Value);
                            break;
                        case XmlNodeType.CDATA:
                            Console.WriteLine("<![CDATA[{0}]]>", reader.Value);
                            break;
                        case XmlNodeType.ProcessingInstruction:
                            Console.WriteLine("<?{0} {1}?>", reader.Name, reader.Value);
                            break;
                        case XmlNodeType.Comment:
                            Console.WriteLine("<!--{0}-->", reader.Value);
                            break;
                        case XmlNodeType.XmlDeclaration:
                            Console.WriteLine("<?xml version='1.0'?>");
                            break;
                        case XmlNodeType.Document:
                            break;
                        case XmlNodeType.DocumentType:
                            Console.WriteLine("<!DOCTYPE {0} [{1}]>", reader.Name, reader.Value);
                            break;
                        case XmlNodeType.EntityReference:
                            Console.WriteLine(reader.Name);
                            break;
                        case XmlNodeType.EndElement:
                            Console.WriteLine("</{0}>", reader.Name);
                            break;
                    }
                }
            }
            catch (XmlException ex)
            {
                Console.WriteLine(ex.Message);
            }
        }
    }
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标签：  c# xml exception string path null
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