This is one of those problems where there just doesn't seem to be anything of use on Google.Does anyone have any code snippets of how to achieve this? This thread: url...links to a solution but experts exchange has been a paid for service for a while now.Ideally, the solution needs to be able to handle any number of parent/child nodes.
View 3 RepliesI need to create an XML doc that I can call up and populate a treeview with. Can someone show me that basics on doing this. A simple example will suffice. Note I am not using XML-speak for any of this description. Assume I have some unknown number of Types (Parent Nodes). Each Type has a possible of Three Groups (children to Type nodes). Each Group has an unknown number of randomly names Cases (children to Type nodes). I want to create this XML file, save to a directory and the open again later to load into a treeView control.
Type1
Group 1
XYZ Case
[Code].....
I'm loading a table column from a database into a treeview. The table exists of 3 rows:
[Code]....
When I load the table the descr-column is loaded into the treeview, but I also want the nodes to get a tag which is the "descr2"
[Code]....
I have written a program that requires a particular image to appear in a picturebox. The image will be 1 out of 114 possibilites and the correct one is determined at runtime. I have all 114 images loaded into resources and I have the program correctley selecting the name of the jpg. I have the name of the jpg set to a variable (string) named gsSBdetail and I can make the name of the jpg file appear in a textbox. What code would I write to make the jpg in resources with the name assigned to gsSBdetail appear in a picturebox? NOTE: I have all of the names of the jpg's in a table in a SQL server database and use a multi parameter query to select the correct jpg file name, which in turn is assigend to the gsSBdetail variable. Is ther a way to load jpg's into the SQL server table and just select the jpg file itself for the picture box?
View 5 RepliesI have a datagrid with three columns of data and i need to save all those data to a table in SQL Server.
View 6 RepliesWhen subtracting two doubles the result appears to be correct but when I save said results in a SQL Server table they are incorrect. I know their are problems with decimal values in the binary world but isn't there a work around for this?For example 421.2 - 418.9 = 2.3, but the result stored in the SQL Server table is 2.29!In the VB code I used Math.Round to round to two digits and the values appear correct during debugging but, as I've said, in the end they are off by .01. [code] decimal(10,2)BTW, I've tried numerous methods of getting the correct value but have not met with any success. I've used Math.Round on Val1 and Val2 separately, after the subtraction, and on the ResultVal. I've also converted the ResultVal to a string using Format(ResultVal, "#####.00") and then back to a number but still the value that ends up in the SQL Server table is wrong.
View 5 RepliesIs it possible to manually save data from my dataGridView to my SQL server database table?
if it is possible can some please tell me how to do it because i don't like using the data sets and reader VB has because it doesn't give me full control over the procedure.
please see the code below it all works fine its just the last two line im struggling with, which is where i am trying to save the data from the two columns in my DataGridView [code]...
im writing program that records cursor moves and plays it. I want save and load that coordinates to .mco file but i don't know how. I have an idea but code will be 454679053 kilometers long and it takes 2 centuries to write.
View 6 RepliesIs there a way to save/load a textbox's back color? [code]"Value of type string cannot be converted to system.drawing.color."
View 4 RepliesI'm using the following code to import data from a text file into an existing Access table:
[Code]...
The first time i ran the code, it caused no error but no records where loaded into the table. The second time it causes the OleDbException "Table 'TEMP' already exists."explain me wath am i doing wrong? The text file is comma delimited and it has exactly the same number of columns of the TEMP table.
I think I am almost there but can't find the final piece of the puzzle.The code all works fine if I dont include an image as part of the save but need help with setting the correct parameter for the image.
[Code]...
I recently Ported this C# proxy across to VB.net but I am having the same problems I did in C#... It doesn't fully load a web page (and some don't even load).
VB
Imports System.Threading
Imports System.Net.Sockets
Imports System.Net
Imports System.Text
Module Module1
Private attempts As Integer = 0
[Code] .....
As you can see in the following picture it dosn't completely load VBforums.com: As you can see above the page just stops and in the source code you can tell the page didn't completely load.
I'm working with an Treeview and i'm new at it and i have 2 questions.
1. How can i save the treeview items, to settings (my.settings.history)
2. How can i save the treeview items as an TXT or XML file or another exception.
I'm trying to insert a row into a SQL Server table.
Using this...
cmd.CommandText = "INSERT INTO MyTable (firstname, lastname) VALUES (@firstname, @lastname)"
cmd.Parameters.AddWithValue("@firstname", "bob")
cmd.Parameters.AddWithValue("@lastname", "jones")
cmd.ExecuteNonQuery()
I get an error saying:
ERROR [42000] [Microsoft][ODBC SQL Server Driver][SQL Server]Must declare the scalar variable "@firstname".
But if I use this...
cmd.CommandText = "INSERT INTO MyTable (firstname, lastname) VALUES (?, ?)"
cmd.Parameters.AddWithValue("@firstname", "bob")
cmd.Parameters.AddWithValue("@lastname", "jones")
cmd.ExecuteNonQuery()
...it works fine. What do I need to do to make the first example work? I don't understand what the error message is telling me. How do I declare a "scalar variable"?
I am facing now a very frustrated simple project, I successfully imported .csv to datagridview using VB .NET 2010 but I have no idea how to import it to SQL SERVER 2008 specific data table.
View 7 RepliesI defined a database using SQL Server 2008 R2 Express, and connected to it using Visual Basic 2010 Express. For some reason though, when I use the database in the program, it wants to start off using a negative primary key.Is there any way to make the primary key only a positive number?
View 3 RepliesWe are doing a project using VB2010 as front end SQL server 2008R2 as backend.We need the code to display all the images in thumbnail view in VB when we open a database table.
View 1 RepliesThe above is more or less the complete question. I have created a table in the VB 2010 Database Explorer but I cannot for the life of me work out how I can get this copied or created into the underlying server. It is not appearing in the underyling serverand when I run the code of course I ge "invalid object <tablename>" I have data as well in the table that appears in Database Explorer. I think I have missed something fundamental in my overall conception of using VB 2010 Express with SQL Server Express in that I don't know if I have a local copy (that isn't then mirrored on the server), or what (the ____ have I got)? An article that explains the overall relation of Database Explorer to the underyling Server would be great as well
View 8 RepliesHow can I load treeview from Access? I want to get small example for that.
View 3 RepliesWhat 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.
Private Sub DisplayTreeview()
Try
tv.Nodes.Clear()
Dim i, j As Integer, ds1 As DataSet
S = "select * from Product where PdtRoot=''"
[Code] .....
From a TreeView, I get this XML serialized:
<?xml version="1.0" encoding="utf-16"?>
<node text="<span id='c6f5ab9e-d08f-448a-9143-02d174317c07' oncontextmenu="
SetContextMenu(this.id, event);return false;"
>Zürich</span>" value="c6f5ab9e-d08f-448a-9143-02d174317c07" navigateurl="" populateondemand="False" showcheckbox="false" checked="False" expanded="True" selected="False">
[Code] .....
I was making a treeview favorites for my browser and got this code, however, nothing happens on startup, like the treeview stays emty
Heres the code for the Load handler
If System.IO.File.Exists(FavFile) Then
Dim xdoc As New Xml.XmlDocument
[Code].....
the exact same code works for the orginal project, and I have the same xml document in the same subfolders for my project
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?
View 1 RepliesIs there a way to save all the treeview items in visual basic as an TXT file (I Prefer TXT) or XML?
I also want to save it to my.settings.
I am writing a custom application for IMAIl express 11.5 using IMAIl Server API for .Net
I am using the following code:
Dim DomData As New DomainData()
DomData.Aliases = "TestALias"
[code].....
I want to load 2 crore records in a treeview control with parent child Hierarchy order
for example
- Groupa
- a1
- a2
[Code[....
I have a treeview control on my form, i am trying to load an xml into the treeview to show cities/states (example at the bottom of the page)The xml that treeview is loading from looks like:
vb.net
<?xml version="1.0" encoding="utf-8" ?>
<Locations>
<Group name="US States">
[code]....
I've placed a treeview on my form and when debugging everything works as planned. However, when I publish the application and run it on another machine, I get a null reference exception. This form is an MDIchild and another form in the same child collection loads its TreeView data with no problem.Here's my code, MajorCategories(), MiddleCategories(), MinorCategories() are all arrays of Structures filled in an outside subroutine.
Private Sub CategoryMaintenance_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
RedrawTree()
[code].....
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..