 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
.NET Forum / Languages / C# / October 2007Treeview and ContextMenuStrip
Let's say I have a Treeview control on a form. Each leaf node in the Treeview has a ContextMenuStrip, each with one ToolStripMenuItem, and all ToolStripMenuItems Click event is handled by a comment event handler. How do I determine which Treeview Node signalled the menu event in the common event handler? Joe, When creating the ContextMenuStrip for the nodes in the treeview (assuming you have a separate ContextMenuStrip for each node), I would assign the Tag property to the node in the tree view. Then, in the event handler, you can get the Tag property and know which node triggered the menu.  Signature- Nicholas Paldino [.NET/C# MVP] - mvp@spam.guard.caspershouse.com > Let's say I have a Treeview control on a form. Each leaf node in the > Treeview has a ContextMenuStrip, each with one ToolStripMenuItem, and [quoted text clipped - 3 lines] > How do I determine which Treeview Node signalled the menu event in the > common event handler? Since you are already using a treeview maybe you can answer this question for me. I am new to C# and am trying to populate a treeview from a SQL 2005 table. Do you have s snippit of code that will do that or know a URL where I can see how? I would really appreciate the help. Thanks >Let's say I have a Treeview control on a form. Each leaf node in the >Treeview has a ContextMenuStrip, each with one ToolStripMenuItem, and [quoted text clipped - 3 lines] >How do I determine which Treeview Node signalled the menu event in the >common event handler? >Since you are already using a treeview maybe you can answer this >question for me. I am new to C# and am trying to populate a treeview >from a SQL 2005 table. Do you have s snippit of code that will do >that or know a URL where I can see how? Do you know how to either a) read a SQL2005 table, or b) populate a treeview? >I would really appreciate the help. > [quoted text clipped - 7 lines] >>How do I determine which Treeview Node signalled the menu event in the >>common event handler? I can connect to the DB, create the dataadapter, populate a data set. And I know how to add nodes to a treeview. The problem is how to use the dataset to populate a treeview. I have not found a Windows Forms C# example that can handle an unspecified level of node nesting and Parent = Child. See child rows 15. I would really appreciate the help. Thank you. I have a SQL Server 2005 table containing this data shown below. Child...Parent...Depth.....Hierarchy 1.........NULL.....0.........01 2..........1.......1..........01.02 5..........2.......2..........01.02.05 6..........2.......2..........01.02.06 3..........1.......1..........01.03 7..........3.......2..........01.03.07 11.........7.......3..........01.03.07.11 14.........11......4..........01.03.07.11.14 12.........7.......3..........01.03.07.12 13.........7.......3..........01.03.07.13 8..........3.......2..........01.03.08 9..........3.......2..........01.03.09 4..........1.......1..........01.04 10.........4.......2..........01.04.10 15.........NULL....0..........15 15.........15......1..........15.15 16.........15......1..........15.16 18.........16......2..........15.16.18 17.........15......1..........15.17 >>Since you are already using a treeview maybe you can answer this >>question for me. I am new to C# and am trying to populate a treeview [quoted text clipped - 15 lines] >>>How do I determine which Treeview Node signalled the menu event in the >>>common event handler? I assume that the records you get back from the dataset have the child records after their parent. If not, then the process becomes much more complicated. The brute force method is, for each record, loop through the treeview nodes until you find the parent and add the new node. If the Child field was unique, then you could use Child as the key for each node. That way you could loop through the records in the dataset, directly locate the parent using the Parent value as the key, and add the new node. Yours are not unique, so unless you can modify the data this technique will not work for you. I'm not sure exactly what your data looks like, but maybe you can do this if you make the key be a combination of Child and Depth if that combination is unique. >I can connect to the DB, create the dataadapter, populate a data set. >And I know how to add nodes to a treeview. The problem is how to use [quoted text clipped - 50 lines] >>>>How do I determine which Treeview Node signalled the menu event in the >>>>common event handler? Yes the rows in teh data set are in order. My data looks like this. Child...Parent...Depth.....Hierarchy 1.........NULL.....0.........01 2..........1.......1..........01.02 5..........2.......2..........01.02.05 6..........2.......2..........01.02.06 3..........1.......1..........01.03 7..........3.......2..........01.03.07 11.........7.......3..........01.03.07.11 14.........11......4..........01.03.07.11.14 12.........7.......3..........01.03.07.12 13.........7.......3..........01.03.07.13 8..........3.......2..........01.03.08 9..........3.......2..........01.03.09 4..........1.......1..........01.04 10.........4.......2..........01.04.10 15.........NULL....0..........15 15.........15......1..........15.15 16.........15......1..........15.16 18.........16......2..........15.16.18 17.........15......1..........15.17 The child nodes are not unique, a child may be it's own parent, see 15. This is because a person may be a member of a club and also the president of the club. A child may also have two parents. A person is a member of 2 clubs. I am sure this is a common table structure but I have not found any examples where it is used to populate a treeview. >I assume that the records you get back from the dataset have the child >records after their parent. If not, then the process becomes much [quoted text clipped - 65 lines] >>>>>How do I determine which Treeview Node signalled the menu event in the >>>>>common event handler? > Yes the rows in teh data set are in order. My data looks like this. > [quoted text clipped - 27 lines] > I am sure this is a common table structure but I have not found any > examples where it is used to populate a treeview. I think this is not possible in one treeview. It seems you are mixing different criteria. (president, member, club). What are the child and parent IDs? What do the hierarchy levels mean? What is at the top level and what is below? Armin > Let's say I have a Treeview control on a form. Each leaf node in the > Treeview has a ContextMenuStrip, each with one ToolStripMenuItem, and [quoted text clipped - 3 lines] > How do I determine which Treeview Node signalled the menu event in the > common event handler? The ContextMenuStrip will be passed as the "sender" argument to the event handler, as in Sub xyz_Click( sender as Object, e as EventArgs ) Dim cms as ContextMenuStrip _ = DirectCast( sender, ContextMenuStrip ) From that, you can get the control that caused the ContextMenuStrip to be shown, which will either be the TreeView or the TreeNode (I can't remember which), as in either Dim tn as TreeNode _ = cms.SourceControl or Dim tn as TreeNode _ = DirectCast(cms.SourceControl,TreeView).SelectedNode HTH, Phill W. can u send the sample code to create different contextmenu for different levels in a treeview... Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
|
Reply to this Message
|
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.