Skip to main content

TREEVIEW hierarchical ASP.NET



TreView control to display hierarchical data or group break down data or relational data in Asp.Net

In most of the cases developers need to display Hierarchical data or group breakdown using TreeView control in Asp.Net. Most of the ways you can follow to display such type of group data or relational data or hierarchical data such as gridview, repeater control but if something related to navigational issues then I think TreeView control is the perfect control to display Hierarchical or group or relational data. To do this example please create the below three tables with sample data in your database first to run my example code:

Dept_Sub_Techer

Now add an aspx page in your project.
Modify the HTML Matkup code by below code:
view source
print?
01 <%@ Page Language="C#" AutoEventWireup="true" CodeFile="Hierarchical_TreeView.aspx.cs" Inherits="Hierarchical_TreeView" %>
02   
03 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
04   
05 <html xmlns="http://www.w3.org/1999/xhtml" >
06 <head runat="server">
07     <title>TreeView to display hierarchical or group break down data</title>
08 </head>
09 <body>
10     <form id="form1" runat="server">
11     <div>
12         <asp:Label runat="server" ID="lbl" Font-Bold="true">TreeView to display hierarchical data</asp:Label>
13         <hr />
14         <asp:TreeView ID="TreeView1" runat="server" ShowLines="true">
15         </asp:TreeView>
16     </div>
17     </form>
18 </body>
19 </html>

Now go to the page_load event and write the below code:
view source
print?
01 using System;
02 using System.Data;
03 using System.Web.UI.WebControls;
04 using System.Data.SqlClient;
05 using System.Web.Configuration;
06   
07 public partial class Hierarchical_TreeView : System.Web.UI.Page
08 {
09     protected void Page_Load(object sender, EventArgs e)
10     {
11         if (!Page.IsPostBack)
12         {
13             string ConnString = WebConfigurationManager.ConnectionStrings["TestConnection"].ConnectionString;
14             using (SqlConnection Conn = new SqlConnection(ConnString))
15             {
16                 string SSQLDepartment = "Select * from Department";
17                 string SSQLSubject = "Select * from Subject";
18                 string SSQLTeacher = "Select * from Teacher";
19                 string SFullSQL = SSQLDepartment + ";" + SSQLSubject + ";" + SSQLTeacher;             
20   
21                 DataSet dsFullData = new DataSet();
22                 SqlDataAdapter da = new SqlDataAdapter(SFullSQL, Conn);
23                 da.Fill(dsFullData);
24                 dsFullData.Tables[0].TableName = "Department";
25                 dsFullData.Tables[1].TableName = "Subject";
26                 dsFullData.Tables[2].TableName = "Teacher";
27   
28                 DataRelation Department_Subject = new DataRelation("DeptSub", dsFullData.Tables["Department"].Columns["ID"], dsFullData.Tables["Subject"].Columns["DeptID"]);
29                 dsFullData.Relations.Add(Department_Subject);
30   
31                 DataRelation Subject_Teacher = new DataRelation("SubTech", dsFullData.Tables["Subject"].Columns["ID"], dsFullData.Tables["Teacher"].Columns["SubID"]);
32                 dsFullData.Relations.Add(Subject_Teacher);
33   
34                 foreach (DataRow oDepartment in dsFullData.Tables["Department"].Rows)
35                 {
36                     TreeNode NodeDepartment = new TreeNode();
37                     NodeDepartment.Text = oDepartment["Name"].ToString();
38                     NodeDepartment.Value = oDepartment["ID"].ToString();
39                     TreeView1.Nodes.Add(NodeDepartment);
40   
41                     foreach (DataRow oSubject in oDepartment.GetChildRows("DeptSub"))
42                     {
43                         TreeNode NodeSubject = new TreeNode();
44                         NodeSubject.Text = oSubject["Name"].ToString();
45                         NodeSubject.Value = oSubject["ID"].ToString();
46                         NodeDepartment.ChildNodes.Add(NodeSubject);
47   
48                         foreach (DataRow oTeacher in oSubject.GetChildRows("SubTech"))
49                         {
50                             TreeNode NodeTeacher = new TreeNode();
51                             NodeTeacher.Text = oTeacher["Name"].ToString();
52                             NodeTeacher.Value = oTeacher["ID"].ToString();
53                             NodeSubject.ChildNodes.Add(NodeTeacher);
54                         }
55                     }
56                 }
57             }
58         }
59     }
60 }

Now run the project and hope you will get below interface:
TreeView

Hope now you can represent hierarchical data or group break down data or relational data using asp.net TreeView control.

Comments

Post a Comment

Popular posts from this blog

JQuery lightbox image slideshow gallery in asp.net

Introduction: In this article I will explain how to create lightbox image slideshow in asp.net using JQuery. Description:  In previous post I explained about  Ajax SlideshowExtender sample  to display images slideshow. Now in this article I will explain how to create lightbox image slideshow in asp.net using JQuery. In many websites generally we will see different types of slideshows like whenever we click on image that is automatically open with lightbox effect and we have a chance to see all the remaining images by press next or previous options in slideshow. All these Slideshows are implemented by using JQuery plugins. After seen those slideshows I decided to write post to use JQuery plugins to implement beautiful slideshown in asp.net.  To implement this one I am using  previous post  insert and display images from folder based on imagepath in database  because in that post I explained clearly how to insert images into our project folder a...
Post a Comment
Read more

Editing Child GridView in Nested GridView

Editing Child GridView in Nested GridView In this article we will explore how to edit child gridview in the nested gridview.   Let''s write some code. Step 1:  Add scriptmanager in the aspx page. < asp : ScriptManager   ID ="ScriptManager1"   runat ="server"   EnablePageMethods ="true"> </ asp : ScriptManager > Step 2:  Add below stylesheet for modal popup. < style   type ="text/css">        .modalBackground        {              background-color : Gray;              filter : alpha(opacity=80);              opacity : 0.5;       }        .ModalWindow        {     ...
Post a Comment
Read more

Add Edit Update Records in GridView using Modal Popup in ASP.Net

Add Edit Update Records in GridView using Modal Popup in ASP.Net In this article, I’ll explain how to Add and Edit records in ASP.Net GridView control using ASP.Net AJAX Control Toolkit Modal Popup Extender. Database For this tutorial, I am using Microsoft’s NorthWind database. You can download it using the following link. Download Northwind Database Connection string Below is the connection string to connect to the database. < connectionStrings >     < add name = " conString "      connectionString = " Data Source=.\SQLExpress;database=Northwind;     Integrated Security=true " /> </ connectionStrings >   HTML Markup Below is the HTML Markup of the page. Below you will notice that I have placed a Script Manager and an ASP.Net Update Panel on the page. Inside the Update Panel I have placed an ASP.Net GridView Control along with a Modal Popup Extender that will be used to Add or...
Post a Comment
Read more