Web Forms :: How To Access Dynamic Treeview Control
Oct 9, 2010i want dynamic tree view control for my project .let me Know with code in c#
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Server side Code is:
[code]
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Jun 11, 2010I want to create a scroller in asp.net what is the best and easy method to create using vb.net and getting the data elecment from access database.
how can i careate something like below and also get images and other small content from database.
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So if the treeview click event happens after I need to add my controls, how do I dynamically add controls based on user postback events?
Edit: I tried the ArronLS:
What I did was add the node value to the session array, and use that when I do the init to choose which form elements to load to the controls of a placeholder control. On the treeview click event, I update the node in the session array, clear the old form elements in the placeholder, and add the new form elements to the controls. When the page is loaded again, it should now find the node at init time, so viewstate problems would be circumvented.
Now I haven't fully tested this yet, but there was another similar post that talks about the problems that might result with the viewstate. They suggest a solution that polls the Request[] part of the context (in their case the dropbox) within the Init control, manually handling some of the postback functionality.
My new question is how to I access the selected node in the treeview using the Request array?
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Mar 1, 2011Periodically a rash of occurrences of the following error happen. I believe they're the result of hack attempts. Whether that's the case or not, my question is how can I handle the error? I want to avoid unhandled exceptions. The TreeView control is just
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Message: Input string was not in a correct format.
Stack Trace:
at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberFormatInfo info, Boolean parseDecimal)
at System.Number.ParseInt32(String s, NumberStyles style, NumberFormatInfo info)
at System.Web.UI.WebControls.TreeView.LoadPostData(String postDataKey, NameValueCollection postCollection)
at System.Web.UI.WebControls.TreeView.System.Web.UI.IPostBackDataHandler.LoadPostData(String postDataKey, NameValueCollection postCollection)
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at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
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Feb 11, 2010I am trying to use a treeview control in my application. From the begining I had one parentnode and several childnodes for each parentnode. I wanted to be able to close an opened node when I click on a new one and I maneged that with OnTreeNodeExpanded method.
My problem is that I now need to expand my treeview so it will look something like this:
[code]....
What I want now is:
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2. if i click on childNode i want to expand it so I can see grandchild,
3. if i click on another childNode for the same parentNode I want that the allready expanded childNode collapses and that the childNode I clicked on to expand.
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Apr 28, 2010I have a class Person with three properties, ID, Name, Registered. I have the following array of this class
Person1 (ID=A00 ,Name=Andy )
Person2 (ID=A01 ,Name=John )
Person3 (ID=A02 ,Name=Lina )
Person4 (ID=B00 ,Name=Rachel )
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Person6 (ID=C00 ,Name=Hans )
Person6 (ID=C01 ,Name=Emily )
I need to show this array in a treeview in this way: When the person has ID finished in 00, it is showed how the father node, and the other persons starting with the same letter are the child nodes.
In this case Andy would be the father indented 0, and john and lina would be his childs indented 1.
I need to show this structure in a checkbox treeview and when I select the father checkbox, the child checkbox must be selected too.
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Dec 20, 2010I want to take the treeview's selectednode and then search control from the database for that particular node and then bind it in gridview column dynamically.
The problem is like i am not able to get treeviews selected node in OnInit method and if If i bind it in page load or anyother i am able to get treeview selected node but i cant create dynamic columns at that time using template handler.
How can i get the treeviews selected node or what is the option to bind usercontrol in gridview column dynamically without template handler.
Web Forms :: How To Insert Data To Treeview Control From Database
Sep 12, 2010I want to make a menu used treeview control.so I can get data from database,I want to see in treeview.
My database: Tablename: Menu,Field: Id,ParentId,Title.
How do see this table in treeview
Example:
--Main menu1 -- id is 1,parent id is null
-- sub menu1 -- id is 3,parent id is 1
-- sub menu2 -- id is 4,parent id is 1
--Main menu2 -- id is 2,parent id is null
-- sub menu1 -- id is 5,parent id is 2
-- sub menu2 -- id is 6,parent id is 2
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i am trying to use silverlight with c#.