tabletop simulator Part 163 Dynamically adding treenodes to treeview control in asp net

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c# treeview add child node to existing node

This is continuation to Part 162. Please watch Part 162, before proceeding.

We want to bind this data to a treeview control. If you need the sql script to create and populate the table with sample data, please refere to Part 162.

Code used in the demo
namespace WebFormsDemo
{ public partial class WebForm1 : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { GetTreeViewItems(); } } private void GetTreeViewItems() { string cs = ConfigurationManager.ConnectionStrings["DBCS"].ConnectionString; SqlConnection con = new SqlConnection(cs); SqlDataAdapter da = new SqlDataAdapter("spGetTreeViewItems", con); DataSet ds = new DataSet(); da.Fill(ds); ds.Relations.Add("ChildRows", ds.Tables[0].Columns["ID"], ds.Tables[0].Columns["ParentId"]); foreach (DataRow level1DataRow in ds.Tables[0].Rows) { if (string.IsNullOrEmpty(level1DataRow["ParentId"].ToString())) { TreeNode parentTreeNode = new TreeNode(); parentTreeNode.Text = level1DataRow["TreeViewText"].ToString(); parentTreeNode.NavigateUrl = level1DataRow["NavigateURL"].ToString(); GetChildRows(level1DataRow, parentTreeNode); Treeview1.Nodes.Add(parentTreeNode); } } } private void GetChildRows(DataRow dataRow, TreeNode treeNode) { DataRow[] childRows = dataRow.GetChildRows("ChildRows"); foreach (DataRow row in childRows) { TreeNode childTreeNode = new TreeNode(); childTreeNode.Text = row["TreeViewText"].ToString(); childTreeNode.NavigateUrl = row["NavigateURL"].ToString(); treeNode.ChildNodes.Add(childTreeNode); if (row.GetChildRows("ChildRows").Length GREATERTHAN_SYMBOL 0) { GetChildRows(row, childTreeNode); } } } }
}

tabletop simulator Part 163 Dynamically adding treenodes to treeview control in asp net
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