error in this below code any one solve plz........................

Question

1.00/5 (1 vote)

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Server Error in '/dynamictreeview' Application.
Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0103: The name 'node' does not exist in the current context

Source Error:

Line 88: newnode.PopulateOnDemand = true;
Line 89: 
Line 90: node.ChildNodes.Add(newnode);
Line 91: 
Line 92: }

C#

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.Data.SqlClient;

public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
    {

    }
    protected void TreeView1_TreeNodePopulate(object sender, TreeNodeEventArgs e)
    {
        if (e.Node.ChildNodes.Count == 0)

{

switch (e.Node.Depth)

{

case 0:

fillcategory(e.Node);

break;

case 1:

fillsubcat(e.Node);

break;

}

}

}

    private void fillcategory(TreeNode treeNode)
    {
        SqlConnection con = new SqlConnection("Data Source=CIODEV03\\SQLEXPRESS;Initial Catalog=EmployeeDB;Integrated Security=True");

con.Open();

string qry = "select * from tbl_category";

SqlDataAdapter ad = new SqlDataAdapter(qry, con);

DataSet ds = new DataSet();

try

{

ad.Fill(ds);

}

catch (Exception ex)

{

}

if (ds.Tables[0].Rows.Count > 0)

{

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

{

TreeNode newnode = new TreeNode(r["catname"].ToString() , r["catid"].ToString());

newnode.PopulateOnDemand = true;

node.ChildNodes.Add(newnode);

}



}

    }

    


    private void fillsubcat(TreeNode treeNode)
    {
        string aid = node.Value;

SqlConnection con = new SqlConnection(ConfigurationManager.AppSettings["ConnectionString"]);

con.Open();

string qry = "select subcatid,subcatname from tbl_subcategory where catid='" + aid + "'";

SqlDataAdapter ad = new SqlDataAdapter(qry, con);

DataSet ds = new DataSet();

try

{

ad.Fill(ds);

}

catch (Exception ex)

{

}

if (ds.Tables[0].Rows.Count > 0)

{

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

{

TreeNode newnode = new TreeNode(r["subcatname"].ToString(), r["subcatid"].ToString());

newnode.PopulateOnDemand = false;

newnode.SelectAction = TreeNodeSelectAction.None;

node.ChildNodes.Add(newnode);

}
}
}
}

Posted 12-Feb-12 19:05pm

rockpune

Updated 12-Feb-12 19:07pm

uspatel

v2

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3 solutions

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Sergey Alexandrovich Kryukov · Answer 1 · 2012-02-12T19:41:00

Solution 2

What can be unclear in this self-explanatory error message? How can you use the node which you never declared?

—SA

Posted 12-Feb-12 19:41pm

Sergey Alexandrovich Kryukov

Comments

manognya kota 13-Feb-12 1:51am

+5 :)

Sergey Alexandrovich Kryukov 13-Feb-12 2:05am

Thank you, Manognya.
--SA

manognya kota · Answer 2 · 2012-02-12T19:42:00

Hi,

As per my understanding you are trying to add the node to your treeview. But that is the code is where the error is caused.If you see the error ,

The name 'node' does not exist in the current context

There is no variable with name as 'node'.Also, it doesnt specify where are you adding the new node.I guess that newnode should be added to the node passed as parameter.

Try

treeNode.ChildNodes.Add(newnode);

Please see the below link on adding nodes to your treeview.

http://stackoverflow.com/questions/881607/adding-child-nodes-in-treeview[^]

http://msdn.microsoft.com/en-us/library/aa984278(v=vs.71).aspx[^]

Hope this helps.

RDBurmon · Answer 3 · 2012-02-12T19:16:00

Solution 1

I would suggest you to Clean the solutions. remove all your breakpoints and build it again.
And then try to compile it

Posted 12-Feb-12 19:16pm

RDBurmon

Comments

rockpune 13-Feb-12 1:17am

ok sir

rockpune 13-Feb-12 1:20am

i tryed but not getting output sir

Sergey Alexandrovich Kryukov 13-Feb-12 1:47am

Yes, because this is not a reason. This is a bug I explain below.
You got too correct answers, please see.
--SA

RDBurmon 13-Feb-12 1:37am

Did you cleaned both (solutions / all breakpoints) ?

Sergey Alexandrovich Kryukov 13-Feb-12 1:46am

This is irrelevant. This is nothing but a bug. The name "node" is really used and really never declared. Just search the code to see it.
Sorry, I just have to vote 1 in this case.
--SA

Mycroft Holmes 13-Feb-12 3:53am

This is like the old support wheeze - try reinstalling the application. Garbage!