如何使用C＃来绑定网站地图数据源树视图 [英] How to Bind SiteMap Treeview datasource using c#

问题描述

我有地图数据源控制我的网页上

I have SiteMap Datasource control on my page

<div id="content_inside">


    <asp:SiteMapDataSource ID="SiteMapDataSource1" runat="server" />
         <asp:TreeView ID="TreeView1" ExpandDepth="2"
         </asp:TreeView>

</div>

没有我想绑定它的使用低于code段树视图

No I am trying to bind it's tree view using the below code snippet

  protected void Page_Load(object sender, EventArgs e)
        {
            var context = new moviescontext ();

            var movies= context.movie.GetAll(ref context);

            if (!IsPostBack)
            {

                TreeView1.DataSourceID = "SiteMapDataSource1";
               TreeView1.DataSource = movies;
                TreeView1.DataBind();


            }
        }

在哪里'GETALL'是从数据库

Where 'GetAll' is the function which fetched data from the database

public static List<movies> GetAll(this IEnumerable<movie> movie, ref moviescontext ctx)
{
    var movies= ctx.movie

                         .Select(s => new movies
                         {
                             MovieId= s.MovieID,
                             MovieName = s.MovieName,

                         }).ToList();

    return movies;
}

当我渲染，出现以下错误

when I render, the following error occurred

HierarchicalDataBoundControl only accepts data sources that implement IHierarchicalDataSource or IHierarchicalEnumerable.

任何建议？

推荐答案

您需要执行 IHierarchicalEnumerable 接口。

您可以做到这一点如下：

You can do this as follows:

        public class MovieCollection : List<Movie>, IHierarchicalEnumerable
        {

            public IHierarchyData GetHierarchyData(object enumeratedItem)
            {
                return enumeratedItem as IHierarchyData;
            }

            public System.Collections.IEnumerator GetEnumerator()
            {
                throw new NotImplementedException();
            }
        }

添加您现有的电影是这样的：

Then add your existing movies like this:

public static List<movies> GetAll(this IEnumerable<movie> movie, ref moviescontext ctx)
{
    var movies= ctx.movie

                         .Select(s => new movies
                         {
                             MovieId= s.MovieID,
                             MovieName = s.MovieName,

                         }).ToList();
            var movieCollection = new MovieCollection();
            movieCollection.AddRange(movies);

    return movieCollection;
}

树视图通常用于显示虽然嵌套数据和当前的数据只包含一个级别。

The TreeView is usually used to display nested data though and your current data only contains one level.

这篇关于如何使用C＃来绑定网站地图数据源树视图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！