C#操作xml文件入门

在项目中新建一个xml文件（PersonalResume.xml）如下：

<? xml version = " 1.0 "  encoding = " utf-8 "   ?>
< PersonalResume >
   < Resume genre = " fantasy "  ISBN = " 2-3631-4 " >
     < title > 农凤新个人简历 </ title >
     < Name > Sissy </ Name >
     < Address > 北京市宣武区马连道 </ Address >
     < Email > nongfengxin@ 163 .com </ Email >
     < Phone > 12345678 </ Phone >
   </ Resume >
</ PersonalResume >

 第一：往<PersonalResume>节点中插入一个<Resume>节点：

             string  xmlFilePath  =  Server.MapPath( " XML/PersonalResume.xml " );
            XmlDocument xmlDoc  =   new  XmlDocument();
            xmlDoc.Load(xmlFilePath);
            XmlNode root  =  xmlDoc.SelectSingleNode( " PersonalResume " ); // 查找<PersonalResume>
            XmlElement xe1  =  xmlDoc.CreateElement( " Resume " ); // 创建一个<Resume>节点
            xe1.SetAttribute( " genre " ,  " 冯瑞涛 " ); // 设置该节点genre属性
            xe1.SetAttribute( " ISBN " ,  " 2-3631-4 " ); // 设置该节点ISBN属性

            XmlElement xesub1  =  xmlDoc.CreateElement( " title " );
            xesub1.InnerText  =   " 冯瑞涛个人简历 " ; // 设置文本节点
            xe1.AppendChild(xesub1); // 添加到<PersonalResume>节点中
            XmlElement xesub2  =  xmlDoc.CreateElement( " Name " );
            xesub2.InnerText  =   " Anny " ;
            xe1.AppendChild(xesub2);
            XmlElement xesub3  =  xmlDoc.CreateElement( " Address " );
            xesub3.InnerText  =   " 北京市海淀区 " ;
            xe1.AppendChild(xesub3);

            XmlElement xesub4  =  xmlDoc.CreateElement( " Email " );
            xesub4.InnerText  =   " nongfengxin@gmail.com " ;
            xe1.AppendChild(xesub4);
            XmlElement xesub5  =  xmlDoc.CreateElement( " Phone " );
            xesub5.InnerText  =   " 12345667 " ;
            xe1.AppendChild(xesub5);

            root.AppendChild(xe1); // 添加到<Resume>节点中
            xmlDoc.Save(xmlFilePath);

 第二：修改节点：将genre属性值为“冯瑞涛“的节点的genre值改为“update冯瑞涛”，将该节点的子节点<Name>的文本修改为“Lily”。

   XmlNodeList nodeList  =  xmlDoc.SelectSingleNode( " PersonalResume " ).ChildNodes; // 获取PersonalResume节点的所有子节点
             foreach  (XmlNode xn  in  nodeList) // 遍历所有子节点
            {
                XmlElement xe  =  (XmlElement)xn; // 将子节点类型转换为XmlElement类型
                 if  (xe.GetAttribute( " genre " )  ==   "冯瑞涛 " ) // 如果genre属性值为“冯瑞涛”
                {
                    xe.SetAttribute( " genre " ,  " update冯瑞涛 " ); // 则修改该属性为“update冯瑞涛” 

                    XmlNodeList nls  =  xe.ChildNodes; // 继续获取xe子节点的所有子节点
                     foreach  (XmlNode xn1  in  nls) // 遍历
                    {
                        XmlElement xe2  =  (XmlElement)xn1; // 转换类型
                         if  (xe2.Name  ==   " Name " ) // 如果找到
                        {
                            xe2.InnerText  =   " Lily " ; // 则修改
                             break ; // 找到退出来就可以了
                        }
                    }
                     break ;
                }
            }

            xmlDoc.Save(xmlFilePath); // 保存。

第三：删除 <Resume genre="fantasy" ISBN="2-3631-4">节点的genre属性，删除 <Resume genre="update冯瑞涛" ISBN="2-3631-4">节点。

 XmlNodeList xnl  =  xmlDoc.SelectSingleNode( " PersonalResume " ).ChildNodes;

             foreach  (XmlNode xn  in  xnl)
            {
                XmlElement xe  =  (XmlElement)xn;


                 if  (xe.GetAttribute( " genre " )  ==   " fantasy " )
                {
                    xe.RemoveAttribute( " genre " ); // 删除genre属性
                }
                 else   if  (xe.GetAttribute( " genre " )  ==   " update冯瑞涛 " )
                {
                    xe.RemoveAll(); // 删除该节点的全部内容
                }
            }
            xmlDoc.Save(xmlFilePath);

第四：显示所有数据

   XmlNode xno  =  xmlDoc.SelectSingleNode( " PersonalResume " );

            XmlNodeList xnp  =  xno.ChildNodes;

             foreach  (XmlNode xnf  in  xnl)
            {
                XmlElement xe  =  (XmlElement)xnf;
                Console.WriteLine(xe.GetAttribute( " genre " )); // 显示属性值
                Console.WriteLine(xe.GetAttribute( " ISBN " ));

                XmlNodeList xnf1  =  xe.ChildNodes;
                 foreach  (XmlNode xn2  in  xnf1)
                {
                    Console.WriteLine(xn2.InnerText); // 显示子节点点文本
                }
            }

 源代码下载:/Files/SissyNong/XMLTest.rar

转载于:https://www.cnblogs.com/SissyNong/archive/2009/09/24/1573491.html