help with treeview

help with treeview

• george33387

  i need help building the recirsive function, based on my datatable structure.

  thanks.

  
  
  

• Luis Alonso Ramos

  i gave you the exact structure in my first post,

  but - here it is again:

  the tablw has 2 columns:

  column1 - description , column2 - hirarchy

  e.g

  Desc Hirarchy

  FatherA 1

  SonA 1.1

  SonB 1.2

  FatherB 2

  etc etc....

  
  
  

• mjhoagland

  Hi

  Would you like to tell us about your database structure, So we will be able to help you to the point.

  Thank you

  
  
  

• GoDaddy

  Hi

  Populate the TreeView in a seperate thread

  Use Recersive function to load data in TreeView

  
  
  

• Ariel Mon

  Hi, is this what you are looking for

  private void Load_Click(object sender, EventArgs e) { TreeNode MyFatherA = new TreeNode("MyFatherA"); MyFatherA.Nodes.Add("MySon1"); MyFatherA.Nodes.Add("MySon2"); TreeNode MyFatherB = new TreeNode("MyFatherB"); MyFatherB.Nodes.Add("MySon3"); MyFatherB.Nodes.Add("MySon4"); treeView1.Nodes.Add(MyFatherA); treeView1.Nodes.Add(MyFatherB); }

   

  
  
  

• ivj

  private void Form1_Load(object sender, System.EventArgs e)

  {

  DataTable dt = GetTable();

  foreach(DataRow dr in dt.Rows)

  {

  if(dr[1].ToString().IndexOf(".") == -1)

  {

  TreeNode tn = new TreeNode(dr[0].ToString());

  tn.Nodes.Add(GetChildNodes(new DataView(dt), dr[1].ToString()));

  treeView1.Nodes.Add(tn);

  }

  }

  }

  private TreeNode GetChildNodes(DataView dv , string hirarchy)

  {

  dv.RowFilter = "hirarchy LIKE '" + hirarchy + "*' AND hirarchy <> '"+ hirarchy +"'";

  TreeNode tn = new TreeNode();

  foreach(DataRowView drv in dv)

  {

  tn.Text = drv[0].ToString();

  tn.Nodes.Add(GetChildNodes(new DataView(dv.Table), drv[1].ToString()));

  }

  return tn;

  }

  private DataTable GetTable()

  {

  DataTable dt = new DataTable();

  dt.Columns.Add("desc");

  dt.Columns.Add("hirarchy");

  dt.LoadDataRow(new object[]{"FatherA","1"},true);

  dt.LoadDataRow(new object[]{"SonA","1.1"},true);

  dt.LoadDataRow(new object[]{"SonB","2.1"},true);

  dt.LoadDataRow(new object[]{"SonAa","1.1.1"},true);

  dt.LoadDataRow(new object[]{"FatherB","2"},true);

  return dt;

  }

  
  
  
• help with treeview