Apply Search On the nodes of an Treeview ASP.NET control






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Hello All,Today I am showing an interesting block of code which will help you in applying user search on a tree view control of asp.net applications.PrerequisitesFor this you have to create an asp.net demo project using language C#Action:Step 1: Now Create a web page with name...
Hello All,
Today I am showing an interesting block of code which will help you in applying user search on a tree view control of asp.net applications.
Prerequisites
For this you have to create an asp.net demo project using language C#
Action:
Step 1: Now Create a web page with name TreeViewS.aspx .
Step 2: Now Paste the below code there.
//The Search Page code (Design of page) <%@ Page Language="C#" AutoEventWireup="true" CodeFile="TreeViewS.aspx.cs" Inherits="webUI_TreeViewS" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>Abhishek TreeView FindNode</title> </head> <body> <form id="form1" runat="server"> <div> <h3> TreeView FindNode Using User Input</h3> <strong>Search Criteria:</strong>(Use a forward slash (/) to delimit each node value.)<br /> <asp:TextBox ID="ValueText" runat="server" Text="Table/Example One/Section 1.0" Width="50%"></asp:TextBox> <br /> <br /> <asp:Button ID="Submit" runat="server" OnClick="Button_Click" Text="Find Node" /> <br /> <br /> <asp:TreeView ID="MainTree" runat="server" Font-Names="Arial" ForeColor="Blue" PathSeparator="/"> <LevelStyles> <asp:TreeNodeStyle ChildNodesPadding="10" Font-Bold="true" Font-Size="12pt" ForeColor="DarkGreen" /> <asp:TreeNodeStyle ChildNodesPadding="5" Font-Bold="true" Font-Size="10pt" /> <asp:TreeNodeStyle ChildNodesPadding="5" Font-Size="10pt" Font-Underline="true" /> <asp:TreeNodeStyle ChildNodesPadding="10" Font-Size="8pt" /> </LevelStyles> <Nodes> <asp:TreeNode SelectAction="None" Text="Table"> <asp:TreeNode Text="Example One" Value="Example One"> <asp:TreeNode Text="Section 1.0" Value="Section 1.0"> <asp:TreeNode Text="Topic 1.0.1" Value="Topic 1.0.1"></asp:TreeNode> <asp:TreeNode Text="Topic 1.0.2" Value="Topic 1.0.2"></asp:TreeNode> <asp:TreeNode Text="Topic 1.0.3" Value="Topic 1.0.3"></asp:TreeNode> </asp:TreeNode> <asp:TreeNode Text="Section 1.1"> <asp:TreeNode Text="Topic 1.1.1" Value="Topic 1.1.1"></asp:TreeNode> <asp:TreeNode Text="Topic 1.1.2" Value="Topic 1.1.2"></asp:TreeNode> <asp:TreeNode Text="Topic 1.1.3" Value="Topic 1.1.3"></asp:TreeNode> <asp:TreeNode Text="Topic 1.1.4" Value="Topic 1.1.4"></asp:TreeNode> </asp:TreeNode> </asp:TreeNode> <asp:TreeNode Text="Example Two" Value="Example Two"> <asp:TreeNode Text="Section 2.0" Value="Section 2.0"> <asp:TreeNode Text="Topic 2.0.1" Value="Topic 2.0.1"></asp:TreeNode> <asp:TreeNode Text="Topic 2.0.2" Value="Topic 2.0.2"></asp:TreeNode> </asp:TreeNode> </asp:TreeNode> </asp:TreeNode> </Nodes> </asp:TreeView> </div> </form> </body> </html>Step 3: Now paste the below C# code in your web page code file (.CS) file.
//C# Code using System; using System.Data; using System.Configuration; using System.Collections; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Web.UI.HtmlControls; using System.Drawing; public partial class webUI_TreeViewS : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { //This Code is for highlight the selected node if (!IsPostBack) { MainTree.SelectedNodeStyle.ForeColor = Color.Red; } } protected void Button_Click(object sender, EventArgs e) { try { TreeNode node = MainTree.FindNode(Server.HtmlEncode(ValueText.Text.Trim())); if (node != null) { // Indicate that the node was found. node.Select(); ValueText.Text = ""; } else { // Indicate that the node is not in the TreeView control. ValueText.Text = "The specified node (" + ValueText.Text + ") is not in this TreeView control."; } } catch (Exception ex) { throw ex; } } }Now set this page as start page , then compile and run the project. :) Now Type the name of node for search the node will be selected autometicaly in tree list. Have Fun :laugh: