Populate WebDataTree whith a hierarchy of datasource unknown

140

mougneau posted over 12 years ago

Hello,

I am looking for a way to feed my WebDatatree with a data source or build directly in code behind (node by node)

The problem is that I do not know in advance the number of child node.
I used the default component by Microsoft and built each node from a single SQL query that me went back every node and hierarchy.

Would you have an example to come to this?

thank you for your help.

An example of data that I want displayed:

· Node1

· Node2

o Node2.1

o Node2.2

· Node3

o Node3.1

· Node4

o Node4.1

§ Node4.1.1

§ Node4.1.2

o Node4.2

· Node5

· Node6

o Node6.1

§ Node6.1.1

· Node6.1.1.1

· Etc…

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12679

[Infragistics] Radoslav Minchev posted over 12 years ago
Hello julienm,

I've been looking into your scenario and I think that you probably can work it out as manually generate each node of the tree at runtime. I would like to point out the following sources that can help you to get started with the component:

Data Binding

Samples

Best regards,
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140

mougneau posted over 12 years ago in reply to [Infragistics] Radoslav Minchev

Hi Radoslav Minchev

I had already looked at the various examples not found a concrete exmple my example.
I had to create the treeview blows directly in code behind by creating node by node which is an example for other forumers;)

private

void LoadlistRootLevel()
{
DbFileManager Fm = new DbFileManager();
DataSet Ds = Fm.GetListeRepertoire(Role);
ListeRepertoire.Nodes.Clear();
LoadlistNodes(Ds, ListeRepertoire.Nodes);
ListeRepertoire.ClientEvents.NodeClick = "TreeMouseClick";
}
private void LoadlistNodes(DataSet dt, DataTreeNodeCollection nodes)
{
foreach (DataRow dr in dt.Tables[0].Rows)
{
DataTreeNode tn = new DataTreeNode();
string NomEnteteDate = dr["NomRepertoire"].ToString();
tn.Text = NomEnteteDate;
tn.ImageUrl = "/images/IconeFile/racine.png";
tn.Value = dr["IdRepertoire"].ToString();
tn.Key = dr["IdRepertoire"].ToString();
tn.ToolTip = "Répertoire racine";
LoadlistSubLevel(int.Parse(dr["IdRepertoire"].ToString()), tn);
tn.Expanded = true;
if (dr["IdRepertoire"].ToString() == IdRepertoireCourant.ToString()) tn.Selected = true;
else tn.Selected = false;
tn.NavigateUrl = "BLOCKED SCRIPTloadfileFrom('" + dr["IdRepertoire"].ToString() + "','" + dr["NomRepertoire"].ToString() + "');";
tn.Populated = false;
nodes.Add(tn);
}
}
private void LoadlistSubLevel(int IdRepertoireParent, DataTreeNode parentNode)
{
DbFileManager Fm = new DbFileManager();
DataSet Ds = Fm.GetListeRepertoire(IdRepertoireParent, Role);
foreach (DataRow dr in Ds.Tables[0].Rows)
{
DataTreeNode tn = new DataTreeNode();
string NomEnteteDate = dr["NomRepertoire"].ToString();
if (int.Parse(dr["NbFileInRepertoire"].ToString()) > 0)
{
tn.ImageUrl = "/images/IconeFile/repertoire_plein.png";
}
else
{
tn.ImageUrl = "/images/IconeFile/repertoire_vide.png";
}
tn.Text = NomEnteteDate;
tn.Key = dr["IdRepertoire"].ToString();
tn.ToolTip = NomEnteteDate;
tn.Value = dr["IdRepertoire"].ToString();
LoadlistSubLevel(int.Parse(dr["IdRepertoire"].ToString()), tn);
tn.Expanded = true;
if (dr["IdRepertoire"].ToString() == IdRepertoireCourant.ToString()) tn.Selected = true;
else tn.Selected = false;
tn.NavigateUrl = "BLOCKED SCRIPTloadfileFrom('" + dr["IdRepertoire"].ToString() + "','" + dr["NomRepertoire"].ToString() + "');";
tn.Populated = false;
}
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12679

Suggested Answer
[Infragistics] Radoslav Minchev posted over 12 years ago in reply to mougneau
Hello julienm,

I dropped a tree and a button on the page and in code behid I'm generating the nodes like this :

protected void Page_Load(object sender, EventArgs e)

    {

        if (!IsPostBack)

        {

            for (int i = 0; i < 10; i++)

            {

                this.WebDataTree1.Nodes.Add(string.Format("{0} - node", i));

                for (int j = 0; j < 5; j++)

                {

                    this.WebDataTree1

                            .Nodes[i]

                            .Nodes

                            .Add(new Infragistics.Web.UI.NavigationControls.DataTreeNode()

                                    { Text= j+"bla", Key=j+"bla"});

                }

            }

        }

    }

When i trigger a postback with the button the tree gets reloaded with the state that was previously posted, with other words the three keeps its nodes expanded .
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