View Complete Post
Web Forms have the potential to change Web programming by introducing a new programming model built around server-side controls-a model in which controls render their own UIs by generating HTML to return to clients and firing events that are handled by server-side scripts. Since all the action takes place on the Web server, virtually any browser can run a Web Forms app. And thanks to Visual Studio .NET, building a Web Forms app is a lot like using Visual Basic: just drop a control onto a form then write an event handler. This article describes the Web Forms programming model, how it fits with ASP.NET, and introduces DataGrid, TextBox, and other classes in the .NET Framework class library.
MSDN Magazine May 2001
Kindly suggest me how to use drag and drop facility in treeview.
I don't want to use any third party utility.
waiting for reply..........
Thanks in advance
I have a Windows Forms sample app that we use to illustrate drag and drop functionality with our external application. The sample app contains two list boxes, a DragSource and a DropTarget. The DragSource is populated with data that can be dragged and dropped
to the DropTarget, or to our external application. The sample app is written in Visual Studio 2008 using a Windows Forms Application that links to a legacy C++ library.
1. Dragging and dropping between the two listboxes in the same instance
2. Dragging and dropping between the sample app and our external application
What doesn't work and hope to get your feedback on:
1. Dragging and dropping between the sample app and another instance of the sample app fails to read data from the MemoryStream and indicates the following exception: "A first chance exception of type 'System.Runtime.Remoting.RemotingException' occurred
2. Dragging from the DragSource indicates the following exceptions although the DropTarget and our external application are able to read the stream and display the information.
A first chance exception of type 'System.Runtime.InteropServices.COMException' occurred in System.Windows.Forms.dll; A first chance exception of
I'm looking for a treeview with drop down list on each node. the treeview should be dynamicllay created on server side. Each node will have a drop down list and each item of the list will have a different color. When I create the tree on client side, I will have to select dropdown list accroding to a data table.
Also, on the client side, the user should be able to select each node and its leaf to group set the drop down list for one branch.
Is there any controller I can use rather than write my one tree?
Jeff Prosise shows how you can implement drag-and-drop functionality in your Web app with ASP.NET AJAX.
MSDN Magazine January 2008
MSDN Magazine October 2004
Building on the browser-based org chart featuring VML (Vector Markup Language) described previously in Microsoft Internet Developer, this article takes you through the process of refining that sample app by using XML, XSL, and JScript code to create a new, improved version. Drag and drop editing is added to the org chart interface thanks to built-in support found in Internet Explorer 5.0. XML and JScript allow data manipulated on the screen to be saved back to the server in its native format. The final product of this combination of XML, XSL, and VML is a high performance, scalable Internet app that uses processing on the client to reduce stress for the server.
Scott Howlett and Jeff Dunmall
MSDN Magazine March 2000
I've seen this question posted on all corners of the web... "How do I disable "AutoPostBack" on the ASP.NET 2.0 TreeView control?!" Unfortunately, most of the answers either don't work, miss the point (don't work right), or boil down to "You can't do it." I happen to know that this behavior worked perfectly in the IEWebControls TreeView that Microsoft released as an add-on prior to ASP.NET 2.0, however. So I set out to find a solution for the ASP.NET 2.0 TreeView issue.
In a nutshell, the behavior that I and others are looking for is to have a TreeView rendered in a page that allows the user to expand, contract, and select nodes within the TreeView without causing a PostBack to the server. This implies two things: (1) the most recently-selected node should be recorded as the currently-selected node [i.e., at PostBack time, the most-recently selected node is actually represented as the SelectedNode]; and (2) the selected node should exhibit the SelectedNodeStyle as specified in the TreeView declaration.
It appears that the TreeView engineers saw only two possible outcomes from selecting a leaf node in a tree: (1) immediately posting back to the server, or (2) immediately navigating to another web page. They apparently did not consider option (3) just allowing selection in-place on the client, while waiting for a click on so
Hey everyone, I have a treeview and a listview on my ASP.NET
application. However, with treeview I can drag and drop it to where ever
I want it on my page. I tried this with listview, but it wouldn't let
me. Listview automatically positions itself along the left side of my
application. What I'm wanting to do is put my treeview along the right
side and then put my treeview along the left side of the application.
Any ideas on why I can't do this or suggestions on how I might be able
to do this?
By the way, I'm running Visual Studio 2010 and using .NET FRAMEWORK 4.