我的C#创建xml,为什么会报缺少根节点呢？请指点...

[malin2670372]

XmlTextWriter fieldWriter = new XmlTextWriter(@"~\Configuration\mrBaseInf\a.xml" , Encoding.UTF8);
              fieldWriter.WriteProcessingInstruction("xml", "version='1.0' encoding = 'utf-8'");//处理指令
                fieldWriter.Formatting = Formatting.Indented;//自动添加空白符
                fieldWriter.WriteStartDocument();//新建文档
                fieldWriter.WriteStartElement("configuration");

                    fieldWriter.WriteStartElement("field");
                    fieldWriter.WriteStartAttribute("id", "");                    
                    fieldWriter.WriteString("aaaaa");
                    fieldWriter.WriteEndAttribute();

                fieldWriter.WriteEndElement();
                fieldWriter.WriteEndDocument();
                fieldWriter.Flush();
                fieldWriter.Close();

我是想在~\Configuration\mrBaseInf目录下创建a.xml，像上边创建对吗？编译提示缺少根节点....
求解.....

[sskset]

少了一个fieldWriter.WriteEndElement();

[北京的雾霾天]

如果已经调用了 WriteStartDocument，随后使用 WriteProcessingInstruction 方法创建另一个 XML 声明，则将引发异常。

[malin2670372]

o .你很仔细。我是截取代码，少了沾了一个。不是那个问题.....

[北京的雾霾天]

XmlTextWriter fieldWriter = new XmlTextWriter(@"D:\temp\a.xml", Encoding.UTF8);
fieldWriter.Formatting = Formatting.Indented;//自动添加空白符
fieldWriter.WriteStartDocument();//新建文档
//fieldWriter.WriteProcessingInstruction("xml", "version='1.0' encoding = 'utf-8'");//处理指令
fieldWriter.WriteStartElement("configuration");

fieldWriter.WriteStartElement("field");
fieldWriter.WriteStartAttribute("id", "");
fieldWriter.WriteString("aaaaa");
fieldWriter.WriteEndAttribute();

fieldWriter.WriteEndElement();
fieldWriter.WriteEndElement();
fieldWriter.WriteEndDocument();
fieldWriter.Flush();
fieldWriter.Close();

[yagebu1983]

四楼正解！！