第八章   导航控件                                    1:Menu控件[菜单]                                    2:TreeView控件[树状]                                    3:SiteMapPath控件[网站路径]                                    4:MasterPage:母版页                      Menu菜单控件                     属性：                      1)Item:用来设置菜单的项,还可以设置单击每一项时(NavigateUrl)，进入的页面                      2)Orientation:菜单的方向。                      3)StaticEnableDefaultPopOutImage:是否三角箭头。                      4)Font:设置菜单的字体                      5)BorderStyle:设置菜单的边框样式。一般设为OutSet                      6)DynamicMenuItemStyle:设置子菜单的样式  一般设为Groove                      7)Target：用户单击了菜单项之后，用另外一个浏览器打开页面                     TreeView控件：                      属性：                       1)Nodes:用来管理TreeView中各个节点。通过NavigateUrl设置对应的页面                       2)NodeIndent:决定各父子节点之间的距离                       3)SelectedNode:得到所选中的节点                       4)this.TreeView1.SelectedNode.ChildNodes.Add(new TreeNode("天花板","值","导航"));                             在选中的节点下面添加子节点：                       5)添加节点：                             DataTable dt = DataOper.RunHasResult("select * from 部门");                            TreeNode root = new TreeNode("选择了部门");                            this.TreeView2.Nodes.Add(root);                            foreach (DataRow dr in dt.Rows)                              {                                 TreeNode tn=new TreeNode(dr[0].ToString(),dr[1].ToString());                                 root.ChildNodes.Add(tn);                                              }                       5)删除选中的节点：                           if (this.TreeView1.SelectedNode.Parent != null)                                {                                        this.TreeView1.SelectedNode.Parent.ChildNodes.Remove(this.TreeView1.SelectedNode);                                }                           else                                {                                    this.TreeView1.Nodes.Remove(this.TreeView1.SelectedNode);                                }                       6)如何得到单击节点的文本与值。在SelectedNodeChanged事件里写上代码                           this.TreeView1.SelectedNode.Text或this.TreeView1.SelectedNode.Value                       7)几种情况：                                                    A)单击节点时，不弹出页面，直接去执行某些代码。此时，应该在                             SelectedNodeChanged事件里写上代码                              举例：让用户在商品类别表中选择一种类别，在同一个页面里面显示该种                                    商品                           B)单击节点时，弹出页面，但是不传递值。此时，应该在添加节点时，                            直接指定NavigateUrl        举例：让用户在框架左边，选择对应的模块名，又边出现对应的页面                                                                                   C)单击节点时，弹出页面，还要传递值。此时，应该在添加节点时，                            直接指定NavigateUrl,和value                                 this.TreeView2.Nodes.Add(root);                                 foreach (DataRow dr in dt.Rows)                                      {                                        TreeNode tn = new TreeNode();                                        tn.Text = dr[1].ToString();                                        tn.Value = dr[0].ToString();                                        tn.NavigateUrl = "default2.aspx?id=" + dr[0].ToString();                                        root.ChildNodes.Add(tn);                                                      }        举例：                                  让用户在商品类别表中选择一种类别，在另外一个页面里面显示该种                                   商品                            D)从数据库的树型表里面填充treeview                              假设有表：                               NodeId       ParentNode       NodeName           Url                               10000          0       湖北省     www.hubei.com                               10001        10000          武汉市                               10002        10000       仙桃市                               10003          0            广东省                               10004        10003       广州市                               10005        10003       漳州市                                             SiteMapPath控件                                步骤：                                 1)创建站点地图文件SiteMap文件。是一个xml文件格式                                   <?xml version="1.0" encoding="utf-8" ?>      <siteMap xmlns="http://schemas.microsoft.com/AspNet/SiteMap-File-1.0" >         <siteMapNode url="" title=""  description="">             <siteMapNode url="" title=""  description="" />             <siteMapNode url="" title=""  description="" />                </siteMapNode>      </siteMap>                                         Url:决定单击节点，所转到的页面                                         Title:节点的标题                                         Description:节点的描述说明                                  2)直接拖拉多个SiteMapPath到每一个页面上,从第二个页面开始                                    注意首页一般不用加SiteMapPath                                  4)设置各个级别的路径分割符                                   举例：                                   论坛首页--->计算机技术--->编程技术--->网络编程                                                                    MasterPage:母版页                            能够固定某一个页面的区域，而使其它区域发生改变.                            能够发生改变的页是内容页，不能发生改变的页是母版页                            步骤：                            1)创建一个母版页，并加入ContentPlaceHolder控件，用来装内容页                            2)使用母版页。在新建网页面，勾选使用母版页,然后再选择一个母版页       3)一个母版页面里面可以有多个ContentPlaceHolder控件                            4)很显然，内容页会随着母版页的变化，而发生变化。所以有时内容页希望                                      有几种情况：                                1)同一个页面里面，内容页向母版页里面得到传递的数据                                                                从母版页里面得到获得传递的数据                                   方法1：通过Url查询字符串                                     母版页：放入菜单，商品--->水果类，服饰类，家用类                                    内容页：放入GridView，内容页根据母版页所选择的商品类型不一样                                    而发生对应的改变                                   方法2:通过Master对像                                    比如：Master.FindControl("DropDownList1") as DropDownList).SelectedItem.Value;                                    举例：                                    母版页：放入一个下拉框，下拉框里面填充部门名称，从数据库里面获取                                    内容页：放入GridView，内容页根据母版页所选择的部门得到该部门的职工                                                                 2)不同页面之间，内容页的传值                                    源内容页面：Server.Transver("目的内容页");                                    目的内容页：((TextBox)PreviousPage.Form.FindControl("ContentPlaceHolder2").FindControl("txtUser")).Text;                                                                          //这里是源页面的ContentPlaceHolderID="ContentPlaceHolder2"，而不是ID="Content1"                                    源内容页面：  内容页 用户名密码                                     目的内容页面：接受内容页的用户名或显示欢迎信息                             

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