Tree View Webpart for sharepoint list

The idea was to create a navigation webpart which will display dataor links from a list.




Further, I also had a requirenment to change the navigation data according to the selected tab in top navigation. To achive this , i just slected the list name from a custom toolpane of the webpart and then the below webpart will display data from a different list.



Note : I am using a Link type list named "All Programs".



Below is the Code to create a tree view bind to a list



namespace CustomNavigationWP

{

[Guid("93215435-7b75-49e7-b99f-07e96e50b02f")]

public class WebPart1 : System.Web.UI.WebControls.WebParts.WebPart

{

TreeView treeView;

TreeNode rootNode;



public WebPart1()

{

}



protected override void RenderContents(System.Web.UI.HtmlTextWriter writer)

{

// render the control

base.RenderContents(writer);

}



protected override void CreateChildControls()

{

base.CreateChildControls();



// get the current site

SPSite currentSite = SPContext.Current.Site;

using (SPWeb currentWeb = currentSite.OpenWeb())

{

// set the tree view properties

treeView = new System.Web.UI.WebControls.TreeView();

treeView.ShowLines = true; // show lines

treeView.ExpandDepth = 0; // expand non



SPList list = currentWeb.Lists["All Programs"];



// build the tree

rootNode = new System.Web.UI.WebControls.TreeNode(list.Title, "", "", list.RootFolder.ServerRelativeUrl.ToString(), "");



// loop down the tree

GetFolder(list.RootFolder, rootNode, list);



// add the root node to tree view

treeView.Nodes.Add(rootNode);



}

this.Controls.Add(treeView);

base.CreateChildControls();

}



public void GetFolder(SPFolder folder, TreeNode rootNode, SPList list)

{

// create a new node

TreeNode newNode = new System.Web.UI.WebControls.TreeNode(folder.Name, "", "~/_layouts/images/itdl.gif", folder.ServerRelativeUrl.ToString(), "");

try

{

// don't add the forms folder

if (folder.Name != "Link")

{

// loop through all child folders

foreach (SPFolder childFolder in folder.SubFolders)

{

// don't add the forms folder

if (childFolder.Name != "Link")

{

TreeNode trn = new System.Web.UI.WebControls.TreeNode(childFolder.Name, "", "", childFolder.ServerRelativeUrl.ToString(), "");

newNode = GetItems(childFolder, trn);



// add the new node to the tree

rootNode.ChildNodes.Add(newNode);

}

}



}

}

catch { }



}



public TreeNode GetItems(SPFolder folder, TreeNode node)

{

//Get Items from childFolder

SPQuery qry = new SPQuery();

qry.Folder = folder;

SPWeb web = null;



web = folder.ParentWeb;



SPListItemCollection ic = web.Lists[folder.ParentListId].GetItems(qry);



foreach (SPListItem subitem in ic)

{

if (subitem.Folder != null) //Is Subfolder

{

// create a new node for a subfolder and add items to it

TreeNode childNode = new System.Web.UI.WebControls.TreeNode(subitem.Folder.Name);

node.ChildNodes.Add(GetItems(subitem.Folder, childNode));

}



if (subitem.Folder == null)

{

TreeNode trn1 = new System.Web.UI.WebControls.TreeNode(subitem["Title0"].ToString());

node.ChildNodes.Add(trn1);

}

}

return node;

}

}









}