How to generate a tree view in asp.net?
In my asp.net project i need a tree view like structure, the format given below
alt text http://dev1.ispg.in/dg/untitled.bmp
ASP.NET does have a TreeView control that you can use to display a Treeview very similar to the one you show.
If you require the Checkboxes on each and every Treeview node, but sure to set the ShowCheckBoxes attribute to the appropriate setting (i.e. ShowCheckBoxes="All">
Regarding the nodes themselves, you can bind the TreeView to a DataSource which can either be an ASP.NET SiteMap file or an XML Document. Alternatively, you can programmatically add the nodes yourself in code like so:
TreeNode tn = new TreeNode();
tn.Value = "Cities";
TreeView1.Nodes.Add(tn);
tn.ChildNodes.Add(new TreeNode("Cochin 1"));
[etc. etc.]
Some other useful links are:
Using the TreeView Control and a DataList to Create an Online Image Gallery
ASP.NET Treeview Quickstart Tutorial
use the asp.net treeview , have a look here everything is explained
Related
I am working with a project, in which I have a task that Names represents with hierarchy in a treeview control.
That means I must able to add the parent and child nodes to treeview and when I click Save button all the nodes should be stored in database.
My typical task is, if I retrieve the data, all the parent and child node should retrieved and added to the treeview control as I inserted hierarchy only.
Go through following links it might get you started to come with real question.
http://msmvps.com/blogs/deborahk/archive/2009/11/09/populating-a-treeview-control-from-a-list.aspx
http://www.codeguru.com/csharp/csharp/net30/article.php/c15887/Updating-a-Database-from-WinForms-Controls-Old-School.htm
I followed the following tutorial (answer) to create a treeview which is bound to datatase, the only exception being that I have my treeview in a user control.
Populate WinForms TreeView from DataTable
My problem is that after adding a new node or child node the tree doesn't get updated. I have tried to refresh, expandall etc the tree but still doesn't show the newly added node. Bear in mind it is in usercontrol and I'm adding new nodes from parent form.
You might try TreeView.BeginUpdate() and TreeView.EndUpdate() methods as well, before and after the responsible code for altering nodes to your treeview.
how we can add node to tree view dynamically in c#
Assuming this is the WinForms TreeView, see Adding and Removing Nodes with the Windows Forms TreeView Control
I am using the standard asp.net treeview control to display a menu structure that is getting bound from a database. The data structure has a parentID column to represent the node relationship if one exists.
Anyway, that's not an issue, I am looking for a treeview control that would allow a user to rearrange the node by dragging them to a new position within the tree. Can anyone point me in the right direction as to any controls out there that can do this? The windows form control has the move node events. IS there something like this for web forms? Any pointers greatly appreciated.
You can have look at ExtJS TreePanel.
Drag and Drop ordering in a TreePanel
Why not try the JQuery TreeView plug-in?
http://plugins.jquery.com/project/treeview
Not sure if meets all of your non-functional requirements, but if you click on the "Try out a demonstration" link, you should be able to see if it meets your needs.
I have a treeview control on an aspx page. The data comes from database and I bind it to treeview control programmatically. (Parent-Child relationship in database of course)
Well and I added a textbox which I use to add new child under the selected node and it works also good but so as to see the new added node, I have to refresh and page and all the expanded nodes collapses naturally. How can I prevent that. I am also using updatepanel not to refresh whole page and to expand child nodes I am using topicTree_TreeNodePopulate event of course. When users add something under the selected node , without any refreshment or postback the recently added node should be seen right under the selected page.
Thanks in advance..
Btw I haven't much experience on Javascript so I can't do it with javascript.
You can set the Expand property of TreeNode to "false" at the time of binding Tree View or whenever you are refreshing the TreeView.