Database - WPF Treeview In .net?
Nov 15, 2011
I have been looking for a some working code for the last couple of days to set up a treeview in my WPF app to display some database data. I use VB as i am much more confident in it - which drastically limited the code examples out there. More examples i found used manually entered data to populate each node versus a database which was little help. I finally found some code which bound the each node to a query and related the query via a DataRelation. Great this should work perfect!
The example used the Northwind database so I changed it to my database and plugged in the queries. To my shock the treeview populated fine except.... all the data is invisible.
Here is the code:
Imports MySql.Data.MySqlClient
Imports System.Data
Imports System.ComponentModel
[code]....
and here what i end up with the data seems to be there but you can't see it.PS there may be some confusion as to the objects. I went back tried to keep as close to the original code as possible when i discovered the problem only replacing the queries with my own - the original code used "Categories" and "Products" where as I "use Distributors" and "Titles"
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May 14, 2011
I have a problems with my application..
1. collapse and expand treeview when i click plus sign (+) on treeview, treeview didn't expand subfolder but when i click image, treeview expand it.
2. showing path that i check on treeview when i check the treeview then i'm click the button, then return path that i check
This is my code..
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Jun 11, 2009
I am really stugling with this an was hoping that someone has done this in the past and can lend some guidance, I have had a look on Google but I only seem to find examples of one parent and one child.Anyway back to the problem, I have a treeview on a form and I want to allow the user to create a tree structure of their choice. What I mean by that is no limit to parent and child combinations, so basically have the same functionality as in Window Explorer.Now comes the problem, what I want to be able to do is store this tree view hierarchy in a database, so that when they add a new node to the treeview it is stored in the database at the correct level. Then if the user closes the form and re-opens it loads the treeview hierarchy from the database.
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Jun 11, 2009
I am really stugling with this an was hoping that someone has done this in the past and can lend some guidance, I have had a look on Google but I only seem to find examples of one parent and one child.
Anyway back to the problem, I have a treeview on a form and I want to allow the user to create a tree structure of their choice. What I mean by that is no limit to parent and child combinations, so basically have the same functionality as in Window Explorer. Now comes the problem, what I want to be able to do is store this tree view hierarchy in a database, so that when they add a new node to the treeview it is stored in the database at the correct level. Then if the user closes the form and re-opens it loads the treeview hierarchy from the database.I would really apreshiate some guidance on database table stucture and how I can loop through and build the treeview
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Nov 11, 2011
What is the best to load a treeview from a database where it goes 4 deep
Parent
child
child
[Code]....
How would that look in a database? and then how would you load the tree. I can load everything up to the grandchild, but as soon as I load the great grandchild I start having issues. So I am thinking it is the way they are in the database.
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May 12, 2010
how to populate a treeview from a SQL datbase. I have been looking on the web but I have not found a lot and wwhat I did find show some things that, like child nodes that I cannot find. Basically I am pulling orders from the Northwind database and want to have a branch with an order and off this branch the with the ID of the order details. So when the they click on the order node it expands to show the orderdetail ID.
I get the a branch, weiht the code below, with the order IDs but cannot get the child branch.
my code
Public Class Form2
'Dim TreeView1 = New TreeView
Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[Code].....
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Aug 12, 2009
I have the code below, what i have is three volumes called vol2 vol 3 and QRH (these are parent nodes in a treeview), these nodes are named in my database in a volume column 2,3 and 4 respectively. what i want to do is run a query that populates a treeview with another column depending on which parent node is clicked.
A drawing
Volume Parent node name (in treeview) child node
2 vol2 flightpath
3 vol3 takeoff
4 QRH landing
2 vol2 data
and there are more than one child node that has volume 2,3 or 4 what i want is if vol2 is clicked this is oppened
vol2
---Flightpath
---Data
etc etc
below is the code i am working on:
If tvwFCOM.SelectedNode.Text = "vol2" Then
Dim Volume As String = "2" And
Query = New OleDb.OleDbCommand("Select Title From " & cmbFamily.Text & " _Chapters Where Volume = '" & Volume & "'", AccessConn)
End If
If you're not living on the edge, you're taking up too much room?
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May 13, 2011
I'm trying to create nodes from a .sdf database according to a specific value in a combobox.[code]...
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Jun 11, 2009
I have a treeview on a form and I want to allow the user to create a tree structure of their choice. What I mean by that is no limit to parent and child combinations, so basically have the same functionality as in Window Explorer.
Now comes the problem, what I want to be able to do is store this tree view hierarchy in a database, so that when they add a new node to the treeview it is stored in the database at the correct level. Then if the user closes the form and re-opens it loads the treeview hierarchy from the database.
I would really apreshiate some guidance on database table stucture and how I can loop through and build the treeview
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Nov 8, 2010
I want to create a treeview from a database in my project. I have been using linq to retrieve data. I have TeamLeaders, Marketers and Clients. When i expand the TeamLeaders node i want to see the Marketers under that node and when I click on the Marketer. I want the list of clients under that Marketer to be displayed on the right panel that has a gridview. TeanLeaders and Marketers are from one table and Clients in a different table.
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Jan 9, 2010
Private Sub DisplayTreeview()
Try
tv.Nodes.Clear()
Dim i, j As Integer, ds1 As DataSet
S = "select * from Product where PdtRoot=''"
[Code] .....
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Sep 13, 2010
I'm thinking about using the treeview for creating a phonelist. The issue here is that I can't think how to load the data into the nodes according the group they are categorized in.
Here's a screenshot of my test_database:
So there is an ID and a row with groups (groep). What I want is that when loading the data a DISTINCT node gets create for each group and that the person is added to the sub-node. Got the faintest idea where to start.
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Feb 5, 2009
finding a solution on how to save a four level treeview on each table in the database? each level must be saved in the table w/c includes their parent-child relationship.
[Code]...
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Dec 24, 2009
I would like to connect my database to a treeview. Here is my code so far. It is connecting BUT i have problem. SEE the image below
[Code]...
The image below is showing my problem. The Groups are all shown. I would like to see 2A , 3A, 4A ...(so only ONE 2A) .and so on... and then click on the node to open with all the students in that group...
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Oct 10, 2011
The question says it all, I can connect/Open a Access DB and I can setup a Treeview but how can I bind them together?
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Aug 15, 2011
I start program for a library and I have to use Treeview and Access DataBase..I find methode to load database to treeview but the problem is save changes after I run program Access Database load to treeview and I edit tree but how I can save changes before I close program?
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May 1, 2012
If you have a saved string or value in your database. How can you open this that it is selected in a treeview? i mean when you click for example a commandbutton (Open my data)
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Oct 27, 2011
i have a treeview which is databoud to a access dataabse, the database has 1 table, and the treeview shows everyname from column 2.
What im trying to achive is for the treeview to also display the names from column 5 and 6 as child nodes of the name from column 2. Been tinkering all morning to no luck, googles not finding much int he way of working examples, just lots of garbage.
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Mar 2, 2010
i have a treeviev and listbox.i want to display the selected contents of treeview into the listbox.my code is working for file but not for folder. means i want, if the all contents of folder ABC(i.e all files) are selected then in listbox i want to show the only path of folder not the seperate path of each file.
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Oct 25, 2011
i have a treeview say TV1 and another Treeview Say TV2.. Now TV1 Contains all nodes for user rights. and i want to add to tv2 only selected nodes.Like TV1 is
Node 1
....Child of Node 1 (Level 2)
.........Child of Child of Node 1 (Level 3)
what i want is that when i select Level3 Node it should chek TV2 for the parent of this node. if parent exist it should add the node under the same parent. if parent does not exist it should check for Level 1 Node and if it exist it should add Level 2 Node and then Level 3 Node. Otherwise it should add Level 1 , Level 2 and then Level 3 Nodes in order.
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Sep 13, 2010
I have a class, let's call MyClass. In this class, I have a TreeView property let's call myTreeView..In my code, I populate the Nodes of this TreeView so I can use it later on.Then, when it's time to actualy use it, I haven't been able to take all the nodes from myClass and put them in a Tree View Control on my form.[code]The weird thing is that when debugging, the TreeView in MyClass is well populated with the proper values and in the loop, newNode isn't empty, there's actually something but for some reason it's not showing anything.
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Mar 14, 2010
I'm running out of walls to bang my head against. Okay new windows form with a textbox, button and TreeView Populate the TreeView.nodes with the default nodes via properties
[Code]...
I want to click button1 and have the name of the childnode? Node3? placed in the textbox. Not via selection, I can do that. But via index or item number. The code I have is as follows
[Code]...
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Jul 28, 2010
This is my xml file
<?xml version="1.0" encoding="UTF-8"?>
<dataroot xmlns:od="urn:schemas-microsoft-com:officedata" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
[code].....
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Aug 31, 2009
when i click to a node in the treeview i want to see it's corresponding form in the splitcontainer.panel2,there have diffrent nodes and forms.
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Mar 19, 2012
How would it be possible to add a new root to a treeview for example:
-This
---Is
---a
[code]....
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May 24, 2012
How can i add Columns to Treeview so that first column should be as tree and rest are like listview or Listbox.
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Dec 8, 2010
The TreeView uses in its underlying implementation the TreeNodeCollection. The TreeNodeCollection in almost every overload of the add method asks for a key.It also implements indexOfKey and ContainsKey yet there appears to be no way to determine the key of a node from the node itself or from any of the events you would typically use such as TreeView_AfterSelect().
Am I correct or is there in fact someway to retrieve the key from a node or event which I have overlooked? And assuming I am correct. Why on earth was it implemented in such a way? The only thing I could think of was that perhaps TreeNodeCollection.Key is deprecated? But I see no mention of this...
PS: I am aware of the TreeNode.Tag property and how it can be used to the same effect.
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May 15, 2012
I have an xml file with following structure:
<table name="tblcats">
<row>
<Id>3680</Id>
<Industry>Associations</Industry>
<ParentId>1810</ParentId>
</row>
[Code]...
How can I fix this xPath to match my XML ? Please suggest how can I fix this issue
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Jan 9, 2012
I want to display data with level of detail, so i use a TreeView, but each detail is quite short, so i would like to use a WrapPanel (horizontal) to have many details per line.Something like :
This is an unexpanded item
This is The Header of an expanded item
Info 1 Info 2 Info 3 Info 4
[code]......
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Apr 29, 2012
I'm working with a TreeView in a VB.NET to C# conversion project. I have this VB.NET WinForms code
Dim Arguments1 As String = path & "" & fs & " ls " & TreeView1.Nodes(ccc).Name
and I need the C# code. I got this far
string args = path + "\" + fs + " ls" + ...
I would assume it would be
.Items[ccc]
but there is not name attribute in that
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