VS 2008 Treeview Population With Dataset?
May 24, 2010
Im trying to create a treeview with data from an access DB, the tables are structured and related as followsfor example - What i need to do is populate a treeview to look like this, remember all nodes will be have variable number of children (if any)
- Config_groups- Site_info1_detail - Site_info2_detail- Site_info3_detail - Site_info4_detail- Config_groups- Site_info1_detail - Site_info2_detail- Site_info3_detail - Site_info4_detail- Config_groups- Site_info1_detail - Site_info2_detail-
[code].....
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Mar 1, 2012
ok so i have this already done:
Dim x, y As Integer
x = 0
y = 0
[code].....
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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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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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Jun 6, 2009
Getting error messsage "Conversion from string "l.name" to type 'Integer' is not valid." on the higlighted code below. I've tried using the 0 and 1 as the first field "l.name" in the mySelectQuery and 5 or 6 for w.wellNumber.I want the treeview to show each Lease name or field l.name and each w.wellnumber under that lease. The msg box shows me the correct number of records is being retrieved.
Private Sub Load_treSelectWell()
Dim myConnString As String = "integrated security=SSPI;data source=.\ECOLOGICSSQL;persist security info=False;initial catalog=EcoLogics;"
[code].....
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Feb 21, 2011
This is a problem I have been trying to conquer for some time now and haven't managed to deal with. I've looked pretty hard on Google and so on, but most of what I find there is for populating a TreeView from a database. The closest I got was a bit of C# code for populating with a list of file paths. But unfortunately the result is individual roots & branches for each item.
What I'm working on is a message template tool where I'm trying to get the nodes in the treeview, which represents the templates, to populate from an XML file. I'm using DataSets for their simplicity of working with XML. Here's a basic example of the structure of the XML which is imported to the DataSet;
Code:
<?xml version="1.0" standalone="yes"?>
<Templates>
<Item>
[Code].....
So the path to each node will look like RootBranchName. I know this will no doubt require some recursion, but recursion is one thing I haven't fully grasped yet.
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Feb 20, 2009
I'm having a little trouble figuring how to do this.I have a dataset with a single table. Each row has the following fields ProductName, Version, CompanyName
The data might look like this
Visual Studio, 2005, Microsoft
Visual Studio, 2008, Microsoft
Office, 2007, Microsoft
I have already populated the TreeView with a list of Company names from a separate table. Now, what I want to do is to loop through my dataset adding a single node for each product under the appropriate manufacturer. Then under each product adding a separate node for each version of that product.
[Code]...
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Sep 25, 2011
I'm working on a program that allows me to edit XML data in a DataGridView. I have most everything working but I don't like my current TreeView Structure. I load the XML data into a DataSet and edit it there, so that is what I'd prefer to base my TreeView on. I've tried a few things such as..
[Code]...
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Mar 5, 2009
Dim xmldoc As New XmlDataDocument()
Dim xmlnode As XmlNodeList
Dim i As Integer
Dim namestr As String
[code].....
Lately iv been experimenting with XML and VB.net so far so good but not I tried to get it to work with a dataveiw and im confused becasue iv never used one before and wondering why it populates the wrong places like so...like those numbers are spose to go into the ID box and I am spose to get the names in the Name box but it isnt...?
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Oct 4, 2009
so i started a program yesterday and after a whole day of tinkering with codes i have realised that something was wrong with my old program and i have started again.
[Code]...
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Jun 18, 2012
I'm trying to display the population of a city, as soon as it has been chosen in the combobox.I put it on my formload, and it will always read the index of -1 since it hasnt had a chance to be chosen, how would I bypass this without a button being clicked?
If cboCities.SelectedIndex <> -1 Then
lblCurrentPop.Text = "The current population is: " & CStr(intPopulation(9))
Else
MessageBox.Show("You must select a city!")
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Feb 17, 2011
I've got a pretty big datagridview that I have to populate, and it's already (with not loads of data) taking quite a long time to populate. I can't imagine it's possible in my situation to bind the datagridview to the data I want to populate, but here is the situation.
I want the column headers along the top to be a bunch of users, which I have in one data table. I want the row headers along the side to be skill names, whihc I have in another data table, and the data in the middle is the score of each user for each skill in data table 3. Some users don't have a score, some do.
The way I have achieved this at present is to create the columns first using data table 1, then for each skill (data table 2), create an array of rows from data table 3 that match the skill, find the matching user (ColumnIndex) for each of these rows, and fill in the score.
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Jan 10, 2011
I have searched the forums for an answer to this problem and while I have found simalar issuses, I have not found a solution that works for me. I have created a dataset and populated it. I know that this is true because I can view the information in the dataset in other ways such as using labels or textboxes. However to display the data in a organized and usable way I would like to display the information in a DataGridView control. I DO NOT need to be able to modify or add anything to the datagridview, JUST view the information there. I am not using any wizards to complete this and so I need to be able to complete everything programmaticly. I have written the code involved to the best of my understanding. When I run the application, there are no crashes or errors thrown, I just can't get the datagridview to populate. Below is the code that I am currently using:
[Code]...
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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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May 27, 2009
I have a winform that has one combobox. I want to populate that it with a list of folders in a directory. I thought this might be a common thing but I have not found any thing concerning this.For this example lets say the root folder is C:TestingFolder ListIn the folder "Folder List" directory there are 5 folders as such:
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Mar 8, 2012
I have data codes in the format abcd123, abcd345,... present in the table Info of database.I want to drop abcd from code and display remaining code in a combobox of datagridview.
Code:
Dim dsCodeList As New DataSet
Dim dtCodeList As New DataTable
[code]....
It is giving error at first statement inside for loop saying Column Code Does not belong to Table Info.If i write simple query without use of right function and use dtCodeList.Rows(i).Item("Code").substring() to ignore first 5 characters, it works well.
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Jun 21, 2010
Create an application that will predict the approximate size of a population organisms. The user should select or enter the starting number of organisms in a combo box, enter the average daily population increase (as a percentage) in a text box and select or enter the number of days the organisms will be left to multiply in another combo box. For example, assume the user enters the following values:
Starting number of organisms: 2
Average daily increase: 30%
Number of days to multiply 10
The application should display th following table of data.Day Approximate Population 1 2 2 2.6 (table should list values up to 10 days)
Be sure to add appropriate ToolTips for each control on the form.Input validation: Do not accept a number less than 2 for the starting size of the population. Do not accept a negative number for the average daily population increase. Do not accept a number less than 1 for the number of days the organisms will multiply.
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Nov 24, 2009
Once I read the property for DataGridView Column which allows Grid Column to adjust as per the data width. I can not recall it or find it.
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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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Jul 8, 2009
1. when i pick a value from a combo in next col of data grid which also have a combo should populate conditionally.
2.when i edit the cell having combo previous selected value is overwritten by first value of combo it should be if i select any value from combo but should not over written default as i click the cell. (edit mode is on click)
3.by pressing enter key cursor should jump to next cell in same row . means navigation should horizontally but should jump to first cell of next row if cell is last cell
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Jan 14, 2009
I am using the tutorial posted here for my database testing. I have gotten it to display the data using a messagebox but it just goes through them 1 by one. I want it to display all the data from the database in a table on my form.
Using connection As New SqlClient.SqlConnection("Server=71.200.87.112MySQLExpress; Database=database_test;User ID=sa;Password=greddy6;Trusted_Connection=False;")[cod
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Sep 28, 2011
I got some problems with displaying a treeview in vb2008. I want to display a company departments and got two access records: one for the top department and one for the sub-departments. The code looks like this:
TreeView1.Nodes.Clear()
ProgressBar1.Maximum = rsDepartment.RecordCount
ProgressBar1.Minimum = 0
[code]....
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Jan 24, 2010
I am getting a list of computer on my network. I want to run this code in the background but I keep getting an error. How do I delegate the TreeView.Error :The action being performed on this control is being called from the wrong thread
Dim rip As Integer
For rip = 1 To 254
Application.DoEvents()
If My.Computer.Network.Ping(IPArray(0) & "." & IPArray(1) & "." & IPArray(2) & "." & rip, 60) Then
[code]....
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Jan 8, 2011
I'm trying to add items to the treeview. I only need Test to be displayed ones, and add last four items as sub category. I tried this code but get error.
Dim Test As New TreeNode("test")
For x = 1 To 5
TreeView1.Nodes.Add(test)
Next x
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Jul 1, 2009
How can I delselect in a treeview and then cause an event to trigger when nothing is selected.
I can deselect when I left click any of the white space adjacent to any branches but not below them if that makes sense, is there any way for it to work when you are not adjacent to any nodes? I am using this code to deselect.
Private Sub trvProjects_BeforeSelect(ByVal sender As Object, ByVal e As System.Windows.Forms.TreeViewCancelEventArgs) Handles trvProjects.BeforeSelect
trvProjects.SelectedNode = Nothing
End Sub
I then want to be able to add a node at the parent level if nothing in the view is selected using my right click menu and I am using the code below to check if any nodes are selected when I right click
Private Sub trvProjects_NodeMouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles trvProjects.MouseClick
trvProjects.SelectedNode = Nothing
[Code].....
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Mar 31, 2011
The General TreeView Structure, with the level indicated in the left.[code...]
Leaving the 0 and 1 levels, the other levels has to be treated as above. How to achieve this?
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Feb 12, 2011
I'm Trying to select node on treeview with:
Try
Dim nodes As TreeNode() = TreeView1.Nodes.Find("Test", True)
Dim node As TreeNode
For Each node In nodes
TreeView1.Focus()
TreeView1.SelectedNode = node
Next
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
As you can see I'm trying to select the node "test" which is also sub-node. But I get no error nor a selected node.
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Jul 3, 2009
I have a form with a treeview control (trvControl) which is created at design time. I have a sub which creates a temporary treeview (trvTemp) and adds a bunch of nodes to it. It then uses treeview.nodes.copyto and treeview.nodes.addrange to copy these nodes to the control on my form:
[Code]...
It all seems to be working except for one thing - nothing appears in trvControl.
I've run through the code and the node collection is definitely getting copied (I paused in another sub and checked trvControl.nodes and it was correct) but trvControl is still empty on my form.
Incidentally, the reason I am doing this is that I want to use a background worker to populate the nodes but don't want my app locking up for large amounts of time while I access the treenode through an invoke so I thought if I generate the node collection first and just use the invoke to load it into the array it would work better.
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Nov 9, 2009
I want to have a treeview as directory navigator I can view the first path of my dir (C:Dirmanin), I can list all files in and folders in this path, but I can't add the subfolders as node, and the subfolder of the subfolder...
Public Sub LoadFolderTree(ByVal path As String, ByVal e As System.Windows.Forms.TreeView)
Dim sbasenode As System.Windows.Forms.TreeNode
Try
sbasenode = e.Nodes.Add(path)
[code]....
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Apr 26, 2010
I have looked a long time and only found code with c# ans MSSQL, but i want to do this with VB and MYSQL.I populate my treeview with parentnodes with this code. But how do i get the child nodes to the treeview from my childtable?I have parentnodes in one table and childnodes in another.. Or is it better to have em all in one table? I want to have as many childnode levels as possible.My 2 db tables looks like this now:
Table parent looks like this: pID as integer (pk), parentName as varchar
Table child looks like this: cID as integer (pk), parentID as integer, childName as varchar
This is my code now, fetching the parentnodes..
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Page.IsPostBack = False Then
Dim oConn As MySqlConnection = DBConn.getConn("dbname")
oConn.Open()
[code]....
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