使用asp.net递归的方法来实现treeview的数据绑定

递归我想大家都还是比较熟悉吧，在asp.net当中递归也可以实现很多的效果，那么今天的编程软件教程就为你演示一下使用asp.net递归的方法来实现treeview的数据绑定数据。

public partial class Site : System.Web.UI.MasterPage

{

private DataSet ds;

private DataSet set;

private SqlConnection conn;

private SqlDataAdapter dat;

private string sql = "";

protected void Page_Load(object sender, EventArgs e)

{

if (!Page.IsPostBack)

{

BindTreeView();

}

}

/// <summary>

/// 实现treeview绑定的方法

/// </summary>

/// <param name="ParentID">类型编号</param>

/// <param name="Item">节点对象</param>///编程软件教程

public void BindTreeView()

{

TreeNode node;

TreeNode nodes;

ds = RunQuery("select * from bookCagetory");

foreach (DataRow item in ds.Tables[0].Rows)

{

node = new TreeNode()

{

Text = item["categoryName"].ToString(),

Value = item["categoryID"].ToString()

};

sql = string.Format("select * from Book where categoryID={0}", int.Parse(item["categoryID"].ToString()));

set = RunQuery(sql);

foreach (DataRow row in set.Tables[0].Rows)

{

nodes = new TreeNode()

{

Text = row["bookTitle"].ToString(),

Value = row["bookid"].ToString()

};

node.ChildNodes.Add(nodes);

}

TreeViews.BorderWidth = 0;

TreeViews.BorderStyle = BorderStyle.None;

TreeViews.Nodes.Add(node);

}

}

/// <summary>

/// 实现数据库查询的方法

/// </summary>

/// <param name="sql">查询的sql语句</param>

/// <returns></returns>

public DataSet RunQuery(string sql)

{

conn = new SqlConnection("server=.;uid=sa;pwd=123456;database=Chapter4");

dat = new SqlDataAdapter(sql, conn);

ds = new DataSet();

dat.Fill(ds);

return ds;

}

protected void TreeViews_SelectedNodeChanged(object sender, EventArgs e)

{

int index = int.Parse(TreeViews.SelectedValue);

string str = TreeViews.SelectedNode.Text;

Response.Redirect(string.Format("Demo.aspx?Index={0}&&Str={1}",index,str));

}

}

}

此教程的代码来自：http://korey.blog.51cto.com/
本文出自 “编程软件教程|软件破解..” 博客，谢绝转载！