Saroj13
asked on
TreeView created dynamically in the code having issues in asp.net, c#?
I need to create a custom Treeview dynamically in the code and then attach to the panel. I am able to display the treeview. Issues:
1. When clicking on any node, it does:
It shows Javascript error. Also node hover shows javascript:__dopostback().
----To avoid navigation to the next page:
productNode.NavigateUrl = "javascript:void(0);";
This stop the navigation.
2. On node click, its not firing the SelectedNodeChanged event?
Please check my code and fix it:
2.
1. When clicking on any node, it does:
It shows Javascript error. Also node hover shows javascript:__dopostback().
----To avoid navigation to the next page:
productNode.NavigateUrl = "javascript:void(0);";
This stop the navigation.
2. On node click, its not firing the SelectedNodeChanged event?
Please check my code and fix it:
[b]Webform.aspx[/b]
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="ProductGroup.aspx.cs" Inherits="ProductGroup" %>
<!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></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Panel ID="Panel1" runat="server" Height="300px" ScrollBars="Both">
</asp:Panel>
<hr />
</div>
</form>
</body>
</html>
[b]ProductGroup.aspx.cs[/b]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class ProductGroup : System.Web.UI.Page
{
PopulateTree objCatTree = new PopulateTree();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
PopulateTree.xPos = 0;
objCatTree.PopulateProductGroups(Panel1);
}
}
}
[b]PopulateTree Class[/b]
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;
using System.Web.UI;
/// <summary>
/// Summary description for CategoryTree
/// </summary>
public class PopulateTree
{
private string connectionString = ConfigurationManager.ConnectionStrings["DBConnect"].ConnectionString;
public static int xPos = 0;
public static bool alreadyCreated = false;
public PopulateTree()
{
//
// TODO: Add constructor logic here
//
}
public void PopulateProductGroups(Panel treePanel)
{
int iCatID = 0;
string sCatName = "";
int iSubCatID = 0;
string sSubCatName = "";
TreeNode productNode;
TreeNode subProdunctNode;
TreeView productGroupsTreeView;
SqlDataReader rdrProduct = GetProducts();
if (rdrProduct.HasRows)
{
while (rdrProduct.Read())
{
iCatID = Convert.ToInt32(rdrProduct["ProductGroup_ID"].ToString());
sCatName = rdrProduct["ProductGroupName"].ToString();
productGroupsTreeView = new TreeView();
productGroupsTreeView.ID = sCatName;
productNode = new TreeNode();
productNode.Value = rdrProduct["ProductGroup_ID"].ToString();
productNode.Text = sCatName;
productNode.NavigateUrl = "javascript:void(0);";
productNode.SelectAction = TreeNodeSelectAction.SelectExpand;
productGroupsTreeView.Target = "_self";
productGroupsTreeView.Nodes.Add(productNode);
productGroupsTreeView.SelectedNodeChanged += new EventHandler(this.productGroupsTreeView_SelectedNodeChanged);
treePanel.Controls.Add(productGroupsTreeView);
SetTreePosition(productGroupsTreeView);
SqlDataReader rdrSubProduct = this.GetSubProducts_Product(iCatID);
if (rdrSubProduct.HasRows)
{
while (rdrSubProduct.Read())
{
iSubCatID = Convert.ToInt32(rdrSubProduct["SubProductGroup_ID"].ToString());
sSubCatName = rdrSubProduct["SubProductGroupName"].ToString();
subProdunctNode = new TreeNode();
subProdunctNode.Value = rdrSubProduct["SubProductGroup_ID"].ToString();
subProdunctNode.Text = sSubCatName;
subProdunctNode.NavigateUrl = "javascript:void(0);";
productNode.ChildNodes.Add(subProdunctNode);
}
}
rdrSubProduct.Close();
}
}
rdrProduct.Close();
}
public void SetTreePosition(TreeView prodGrpTree)
{
int yPos = 50;
prodGrpTree.Style["Position"] = "Absolute";
prodGrpTree.Style["Top"] = Convert.ToString(yPos) + "px";
prodGrpTree.Style["Left"] = Convert.ToString(xPos) + "px";
xPos = xPos + 250;
}
public SqlDataReader GetProducts()
{
SqlConnection objConnect = new SqlConnection(connectionString);
// create new Command using stored proc name and Connection
SqlCommand objCommand = new SqlCommand("usp_GetProductAllGroupings", objConnect);
objCommand.CommandType = CommandType.StoredProcedure;
try
{
// Open connection to the database
objConnect.Open();
// Execute the stored proc to initialize the DataReader
// Connection will be closed when DataReader goes out of scope
return objCommand.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception objErr)
{
throw (objErr);
}
}
public SqlDataReader GetSubProducts_Product(int intProdID)
{
SqlConnection objConnect = new SqlConnection(connectionString);
// create new Command using stored proc name and Connection
SqlCommand objCommand = new SqlCommand("usp_GetSubProduct_ByProduct", objConnect);
objCommand.CommandType = CommandType.StoredProcedure;
SqlParameter paramSubProductGroupID = new SqlParameter("@Product_ID", SqlDbType.Int);
objCommand.Parameters.Add(paramSubProductGroupID);
paramSubProductGroupID.Value = intProdID;
try
{
// Open connection to the database
objConnect.Open();
// Execute the stored proc to initialize the DataReader
// Connection will be closed when DataReader goes out of scope
return objCommand.ExecuteReader(CommandBehavior.CloseConnection);
}
catch (Exception objErr)
{
throw (objErr);
}
}
protected void productGroupsTreeView_SelectedNodeChanged(object sender, EventArgs e)
{
int x = 0;
}
}2.
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