asp.net中对XML文件进行操作（增、删、改、查）

现在随着网络发展,xml的应用也被不断应用到网络中.本篇主要是针对对Xml的应用进行一些实际操作.代码稚嫩.供自学..HOHO~~

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Xml;


namespace DVBAres_C2._2
...{
    /**//// <summary>
    /// Information_page_templates 的摘要说明。
    /// </summary>
    public class Information_page_templates : System.Web.UI.Page
    ...{
        protected System.Web.UI.WebControls.TextBox tbNewTemplatesName;
        protected System.Web.UI.WebControls.Button btnChange;
        protected System.Web.UI.WebControls.TextBox TextBoxTemplatesName;
        protected System.Web.UI.WebControls.Button btnQuery;
        protected System.Web.UI.WebControls.DropDownList ddlName;
        protected System.Web.UI.WebControls.Button btnDelete;
        protected System.Web.UI.WebControls.Label dgTitle;
        protected System.Web.UI.WebControls.Button Button_NewTemplates;
        protected System.Web.UI.WebControls.DataGrid dgShow;
    
        private void Page_Load(object sender, System.EventArgs e)
        ...{
            // 在此处放置用户代码以初始化页面
            try
            ...{
                if(!IsPostBack)
                ...{
                    Bind();
                    
                }
                    
            }
            catch
            ...{
                Response.Write("没有发现模板库中有任何模板!!!");
            }
        
            btnDelete.Attributes.Add("onclick","return confirm('你确定要删除该模板吗?')");
            
        }

        Web 窗体设计器生成的代码#region Web 窗体设计器生成的代码
        override protected void OnInit(EventArgs e)
        ...{
            //
            // CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
            //
            InitializeComponent();
            base.OnInit(e);
        }
        
        /**//// <summary>
        /// 设计器支持所需的方法 - 不要使用代码编辑器修改
        /// 此方法的内容。
        /// </summary>
        private void InitializeComponent()
        ...{    
            this.btnChange.Click += new System.EventHandler(this.btnChange_Click);
            this.btnQuery.Click += new System.EventHandler(this.btnQuery_Click);
            this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);
            this.Button_NewTemplates.Click += new System.EventHandler(this.Button_NewTemplates_Click);
            this.Load += new System.EventHandler(this.Page_Load);

        }
        #endregion

        private void Bind()
        ...{
            //XML数据绑定
            DataSet ds = new DataSet();
            ds.ReadXml(Server.MapPath("./Templates/Statistical_charts_types_templates.xml"));
            dgShow.DataSource = ds.Tables[0].DefaultView;
            dgShow.DataBind();
            XmlDocument doc = new XmlDocument();
            doc.Load(Server.MapPath("./Templates/Statistical_charts_types_templates.xml"));
            XmlNodeList elemList = doc.GetElementsByTagName("TemplatesName");
            ddlName.Items.Clear();
            for(int i=0;i<elemList.Count;i++)
                ddlName.Items.Add(elemList[i].InnerXml);
            //XmlTemplates=ddlName.SelectedItem.Value;
        }
        private void Button_NewTemplates_Click(object sender, System.EventArgs e)
        ...{
            string fileName = Server.MapPath(@".TemplatesStatistical_charts_types_templates.xml");   //要打开的文件
            try
            ...{

                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.Load(fileName);
                XmlNode root=xmlDoc.SelectSingleNode("DVBAres");//查找<Dvb>
                XmlNodeList xnl=xmlDoc.SelectSingleNode("DVBAres").ChildNodes;
                int nIndex = xnl.Count;
                //以下添加新结点
                XmlElement xe1=xmlDoc.CreateElement("Templates");//创建一个Templates节点
                XmlElement xesub1=xmlDoc.CreateElement("TemplatesID");
                xesub1.InnerText=nIndex.ToString();//设置文本节点
                xe1.AppendChild(xesub1);//添加到Templates节点中
                XmlElement xesub2=xmlDoc.CreateElement("TemplatesName");
                xesub2.InnerText=TextBox_TemplatesName.Text;
                xe1.AppendChild(xesub2);
                XmlElement xesub3=xmlDoc.CreateElement("TemplatesChan");
                xesub3.InnerText=Chan_List.SelectedItem.Value;//获取下拉列表索引值
                //xesub3.InnerText=Chan_List.SelectedItem.Text;//获取下拉列表TEXT
                xe1.AppendChild(xesub3);
                XmlElement xesub4=xmlDoc.CreateElement("TemplatesErr");
                xesub4.InnerText=Err_List.SelectedValuesToString();
                //xesub4.InnerText=Err_List.SelectedLabelsToString();
                xe1.AppendChild(xesub4);
                XmlElement xesub5=xmlDoc.CreateElement("TemplatesStat");
                xesub5.InnerText=DropDownListStat.SelectedItem.Value;
                //xesub5.InnerText=DropDownListStat.SelectedItem.Text;
                xe1.AppendChild(xesub5);
                root.AppendChild(xe1);//添加到<Dvb>节点中
                xmlDoc.Save(fileName);
                Page.Response.Write("生成模版成功!");
            }
            catch
            ...{
                Page.Response.Write("生成模板失败!请检查路径是否正确，以及是否有写入权限。");
            }
        }

        private void btnChange_Click(object sender, System.EventArgs e)
        ...{
            try
            ...{
                XmlDocument xmlDoc = new XmlDocument();
                xmlDoc.Load(Server.MapPath("./Templates/Statistical_charts_types_templates.xml"));
                XmlNodeList nodeList=xmlDoc.SelectSingleNode("DVBAres").ChildNodes;//获取dbGuest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
            
                    XmlNodeList node = xe.GetElementsByTagName("TemplatesName");
                    if(node.Count>0)
                    ...{

                        if(node[0].InnerText==ddlName.SelectedItem.Text)
                        ...{
                            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=="TemplatesName")//如果找到
                                ...{
                                    xe2.InnerText=this.tbNewTemplatesName.Text;//则修改
                                    break;//找到退出来就可以了
                                }
                            }
                            break;
                        }
                    }
                
                }
                xmlDoc.Save(Server.MapPath("./Templates/Statistical_charts_types_templates.xml"));
                Bind();
                Page.Response.Write("修改成功!");
            }
            catch
            ...{
                Page.Response.Write("你要查看的文件路径不对,请检查路径是否正确,以及是否有写入权限");
            }
        }

        private void btnQuery_Click(object sender, System.EventArgs e)
        ...{
            try
            ...{
                XmlDocument doc = new XmlDocument();
                doc.Load(Server.MapPath("./Templates/Statistical_charts_types_templates.xml"));
                TextBoxTemplatesName.Text = doc.SelectSingleNode("//Templates[TemplatesName='"+ddlName.SelectedItem.Text+"']").ChildNodes.Item(1).InnerText;
            }
            catch
            ...{
                Page.Response.Write("你要查看的文件路径不对,请检查路径是否正确");
            }
        }

        private void btnDelete_Click(object sender, System.EventArgs e)
        ...{
            
            
                try
                ...{
            
                    XmlDocument xmlDoc = new XmlDocument();
                    xmlDoc.Load(Server.MapPath("./Templates/Statistical_charts_types_templates.xml"));
                    XmlNodeList xnl=xmlDoc.SelectSingleNode("DVBAres").ChildNodes;
 
                    foreach(XmlNode xn in xnl)
                    ...{
                        XmlElement xe=(XmlElement)xn;
                        XmlNodeList node = xe.GetElementsByTagName("TemplatesName");

                        if(node.Count>0)
                        ...{
                            if(node[0].InnerText==ddlName.SelectedItem.Text)
                            ...{
                                xe.RemoveAll();//删除该节点的全部内容
                                break;
                            }
                        }        
                    
                    }
                    xmlDoc.Save(Server.MapPath("./Templates/Statistical_charts_types_templates.xml"));
                    Bind();        
                    Page.Response.Write("删除模版成功!");
                }
            
                catch
                ...{
                    Page.Response.Write("删除模板失败!请检查路径是否正确，以及模板库中是否还有模板.以及是否有写入权限。");
                }
            
            
        }




        
    }
}