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treeview Structure in ASP.NET

Posted By:Athira Sreejith       Posted Date: February 22, 2009    Points: 10    Category: ASP.NET Controls    URL: http://www.dotnetspark.com  
 

treeview Structure in ASP.NET Below is the example code.

using System;

using System.Data;

using System.Data.SqlClient;

using System.Configuration;

using System.Collections;

using System.Web;

using System.Web.Configuration;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

public partial class LoginPage : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

if (!Page.IsPostBack)

{

using (SqlConnection conn = new SqlConnection(WebConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString))

{

string projects = "select * from projects";

string groups = "select * from groups";

string tasks = "select * from tasks";

string combinedString = projects + ";" + groups + ";" + tasks;

 

DataSet dsNew = new DataSet();

SqlDataAdapter da = new SqlDataAdapter(combinedString, conn);

da.Fill(dsNew);

dsNew.Tables["Table"].TableName = "projects";

dsNew.Tables["Table1"].TableName = "groups";

dsNew.Tables["Table2"].TableName = "tasks";

DataRelation rlProjectsGroups = new DataRelation("ProjToGrp", dsNew.Tables["projects"].Columns["pid"], dsNew.Tables["groups"].Columns["pid"]);

dsNew.Relations.Add(rlProjectsGroups);

DataRelation rlGroupsTasks = new DataRelation("GrpToTask", dsNew.Tables["groups"].Columns["gid"], dsNew.Tables["tasks"].Columns["gid"]);

dsNew.Relations.Add(rlGroupsTasks);

TreeNode Tprojects, Tgroups, Ttasks;

foreach (DataRow projectRow in dsNew.Tables["projects"].Rows)

{

Tprojects = new TreeNode();

Tprojects.Text = projectRow["pname"].ToString();

Tprojects.Value = projectRow["pid"].ToString();

TreeView1.Nodes.Add(Tprojects);

foreach (DataRow groupRow in projectRow.GetChildRows("ProjToGrp"))

{

Tgroups = new TreeNode();

Tgroups.Text = groupRow["gname"].ToString();

Tgroups.Value = groupRow["gid"].ToString();

Tprojects.ChildNodes.Add(Tgroups);

foreach (DataRow taskRow in groupRow.GetChildRows("GrpToTask"))

{

Ttasks = new TreeNode();

Ttasks.Text = taskRow["tname"].ToString();

Ttasks.Value = taskRow["tid"].ToString();

Tgroups.ChildNodes.Add(Ttasks);

}

}

}

}

TreeView1.CollapseAll();

}

}

}



     

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