TreeView和Xml做数据源的一些编辑、插入、删除操作（更新）

更新后直接上代码：

protected void fvDataBind()
    {
        if (TreeView1.SelectedNode != null)
        {
            string path = TreeView1.SelectedNode.DataPath;
            int depth = TreeView1.SelectedNode.Depth;
            XmlDataSource2.XPath = path;
            FormView1.DataSource = XmlDataSource2;
            FormView1.DataBind();
            Label1.Text = "";
        }
        else 
        {
            Label1.Text = "请选择你要编辑的节点位置";
        }
    }
    protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
    {
        fvDataBind();
    }
    protected void FormView1_ItemCommand(object sender, FormViewCommandEventArgs e)
    {
        switch (e.CommandName) 
        {
            case "Edit":
                FormView1.ChangeMode(FormViewMode.Edit);
                break;
            case "New":
                FormView1.ChangeMode(FormViewMode.Insert);
                break;
            case "Cancel":
                FormView1.ChangeMode(FormViewMode.ReadOnly);
                break;
            case "Update":
                TextBox tb = (TextBox)this.FormView1.FindControl("TextBox1");
                TextBox tb1 = (TextBox)this.FormView1.FindControl("TextBox2");
                TextBox tb4=(TextBox)this.FormView1.FindControl("TextBox4");
                updateXml(Server.MapPath("~/admin/hero/XMLFile2.xml"), tb.Text, tb1.Text,tb4.Text);
                break;
            case "Insert":
                TextBox tb5 = (TextBox)this.FormView1.FindControl("TextBox5");
                TextBox tb6= (TextBox)this.FormView1.FindControl("TextBox6");
                TextBox tb3 = (TextBox)this.FormView1.FindControl("TextBox3");
                RadioButton rb1 = (RadioButton)this.FormView1.FindControl("RadioButton1");
                RadioButton rb2 = (RadioButton)this.FormView1.FindControl("RadioButton2");
                if (rb2.Checked)
                {
                    insertXml(Server.MapPath("~/admin/hero/XMLFile2.xml"), tb5.Text, tb6.Text, tb3.Text, "before");
                }
                if (rb1.Checked) 
                {
                    insertXml(Server.MapPath("~/admin/hero/XMLFile2.xml"), tb5.Text, tb6.Text, tb3.Text, "after");
                }
                break;
            case "Delete":
                deleteXml(Server.MapPath("~/admin/hero/XMLFile2.xml"));
                break;
        }
    }
    protected void FormView1_ModeChanging(object sender, FormViewModeEventArgs e)
    {
        switch(e.NewMode )
        {
            case FormViewMode.Edit:
                fvDataBind();
                break;
            case FormViewMode.Insert:
                fvDataBind();
                break;
            case FormViewMode.ReadOnly:
                fvDataBind();
                break;
            
        }
    }
    protected void updateXml(string xmlpath,string newvalue,string newvalue1,string navurl) 
    {
        XmlDocument doc = new XmlDocument();
        doc.Load(xmlpath);
        XmlElement root = doc.DocumentElement;
        string xpath = TreeView1.SelectedNode.DataPath;
        XmlNode xn = root.SelectSingleNode(xpath);
        XmlElement xe = (XmlElement)xn;
        if (newvalue == "")
        {
            xe.SetAttribute("text", newvalue1);
            xe.SetAttribute("navurl", navurl);
        }
        else
        {
            xe.SetAttribute("type", newvalue);
            xe.SetAttribute("navurl", navurl);
        }
        doc.Save(xmlpath);
    }
    protected void insertXml(string xmlpath,string newvalue,string newvalue1,string navurl,string position) 
    {
        XmlDocument doc = new XmlDocument();
        doc.Load(xmlpath);
        XmlElement root = doc.DocumentElement;
        string xpath = TreeView1.SelectedNode.DataPath;
        int depth=TreeView1.SelectedNode.Depth;
        XmlNode xn = root.SelectSingleNode(xpath);
        XmlElement xe = (XmlElement)xn;
        if (newvalue == "")
        {
            XmlElement xe1 = doc.CreateElement("Prpducttype");
            xe1.SetAttribute("text", newvalue1);
            xe1.SetAttribute("navurl", navurl);
            if (depth == 1)
            {
                if (position == "before")
                {
                    xe.ParentNode.InsertBefore(xe1, xn);
                }
                else
                {
                    xe.ParentNode.InsertAfter(xe1, xn);
                }
            }
            if (depth == 0) 
            {
                if (position == "before") 
                {
                    Label1.Text = "不能插入";
                }
                if (position == "after") 
                {
                    xe.AppendChild(xe1);
                }
            }
        }
        else 
        {
            XmlElement xe1 = doc.CreateElement("Product");
            xe1.SetAttribute("type", newvalue);
            xe1.SetAttribute("navurl", navurl);
            if (position == "before")
            {
                xe.ParentNode.InsertBefore(xe1, xn);
            }
            else 
            {
                xe.ParentNode.InsertAfter(xe1, xn);
            }
        }
        doc.Save(xmlpath);
    }
    protected void deleteXml(string xmlpath) 
    {
        XmlDocument doc = new XmlDocument();
        doc.Load(xmlpath);
        XmlElement root = doc.DocumentElement;
        string xpath = TreeView1.SelectedNode.DataPath;
        int depth = TreeView1.SelectedNode.Depth;
        XmlNode xn = root.SelectSingleNode(xpath);
        XmlElement xe = (XmlElement)xn;
        xe.ParentNode.RemoveChild(xn);
        doc.Save(xmlpath);
    }
    protected void FormView1_ItemUpdating(object sender, FormViewUpdateEventArgs e)
    {
        FormView1.ChangeMode(FormViewMode.ReadOnly);
        TreeView1.DataBind(); 
    }

    protected void FormView1_ItemInserting(object sender, FormViewInsertEventArgs e)
    {
        FormView1.ChangeMode(FormViewMode.ReadOnly);
        TreeView1.DataBind();
    }

    protected void FormView1_ItemDeleting(object sender, FormViewDeleteEventArgs e)
    {
        FormView1.ChangeMode(FormViewMode.ReadOnly);
        TreeView1.DataBind();
    }

写完发现自己还是没有按面向对象来写代码，纯粹是面向过程和功能，缺点很明显，只能修改父级和子级，多了没那功能，不过总算完成点需要，就先这样，再学习吧。