Retrieving Collection Object From Listbox?
May 17, 2012
Currently, I have a listbox lstInventory where I have loaded some database information from a .mdb file. I am able to add new records, and they all display correctly.
Yet, I can't seem to retrieve or access any of the listbox items. (Not trying to reaccess database in here, yet). I am hoping to "Edit" an existing database record by matching it to the lstInventory's selecteditem property. Unfortunately, I am not able to retrieve anything (tried traditional CType(lstInventory.selecteditem.ToString, String) approach, as well as a debug.write approach (which I can't seem to display, even with a Listener-which is another issue in itself).
Furthermore, when I check the listbox.items.count property, it prints out as a "0" [using a messagebox.show()]
I have tried searching multiple forums, but found lots of "database into listbox" threads, and the MSDN website hasn't helped me yet. Do I need to know the collection's name (what would it's name be based on ?)? Or am I not converting the object into a printable/countable quantity?
View 5 Replies
ADVERTISEMENT
Dec 10, 2010
My
Public Class Form1
Dim x As Integer = 0
[Code]....
As you can see, i can retrieve the tag of the button (which is created at runtime) without any problems, i've made a temporary msgbox to show me the value of the tag, just for testing purposes. What i do have a problem with, is retrieving the tag of the individual web browsers, how should i do this?
Next issue, how would i code for my buttons to show the web browser with the same tag as the button that's just been clicked?
View 3 Replies
Sep 8, 2011
I'm creating a VB.NET 2010 application which is connected to an Access 2010 database. I've set up a connection using the inbuilt connection wizard. I want to pull data from the tables using ADO.NET objects such as the data adapter to create datasets. The data adapter in ADO needs the connection object. Can I pull this from app.config? Should I junk the inbuilt connection and create a new one with code alone? Help.Scott M Brush
View 1 Replies
May 13, 2011
I am kinda new to VB, but have used C# to pull data from a SQL Server db using DataTables and Reader, etc, however I am at a loss as to how to accomplish this in VB.I have a variable, which the user specifies, that I wish to use as a parameter in a SQL string, much like the following: "SELECT x FROM y WHERE x = '@param'" The result will then be stored in a string variable and I wiill do what I have to do with it.
[code]...
View 9 Replies
Aug 7, 2009
I want to retrieve an object by using a string representation of the objects name. For example lets say i want to change the font of 3 labels on a form programatically. Instead of changing the font property for each individual label like so:
Label1.Font = FontDialog1.Font
Label2.Font = FontDialog1.Font
Label3.Font = FontDialog1.Font
I want iterate through the labels in a For..next loop like so:
[Code]..
View 4 Replies
Feb 7, 2010
I have a checked listbox that I've populated with a table that has three columns, Name, Address, Phone - and have done so successfully, but when i display the items in the listbox, i would like to retrieve additional values of the checked items other than the primary displayitem.[code]'we now have an array full of the Name column only, from our checked items 'i'd like to grab the other two as well (not to display in the listbox, but to use elsewhere as variables) 'and keep the checked listbox as a control in the above code, the fill_array variable is only populated with the items displayed in the checkedlistbox - my question is, can i keep the display item the same and pull the other two columns from the datasource, but only for the ones that make the checkeditems list?
View 5 Replies
May 4, 2006
I'm trying to obtain the Terminal Services Profile Path for a user using VB.Net and the System.DirectoryServices.DirectorySearcher. I am able to get the user object's first name, last name, city, state, zip, etc. However, there is one property that eludes me. I cannot manage to find a way to get the terminalservicesprofilepath property.This is how I did it in VB6 and it worked perfect:
visual basic code:
Dim TSPath as string
Dim FirstName as string
[code].....
View 5 Replies
Mar 24, 2010
I need to find a method of looping through a listbox and retrieving the index number and values - quite straightforward in asp, but turning out to be something of a nightmare in winforms!Here is the scenario - The user can add values in a textbox, that are in turn added to a DataTable that gives it a unique ID and a row number, this is then bound to the listbox. The user can then move the items up or down the list by adjusting the row number in the datatable and rebinding to the listbox..
The problem that I am hitting is when the user needs to delete an item -the first part is easy - delete from the DataTable and rebind to the listbox. The bit where I hit the proverbial brick wall is needing to loop through the listbox rows and getting both the index number and the ValueMember - that way I can change the row numbers in the DataTable based on the index number against the ID number.
View 4 Replies
May 26, 2011
problem that i am facing is i want to add array of object as a single item in listbox. in vb6 i was using this Label1.Caption = Label1.Caption & Mid$ (strInput, intI, 1) & " " List1.AddItem (Label1.Caption) i was using label. caption to store object but not work in vs2008 because label.text only take text and left other values
View 18 Replies
Aug 31, 2011
I have a class with a collection of objects of type clsCDImage
clsAllCDs:
Imports System.Data.OleDb
Public Class clsImages
Private mAllCDimages As New Collection
[Code].....
View 2 Replies
Oct 17, 2011
I am trying to add numbers. So if there are 2 numbers in a listbox, theyare summed up. If there are 3 numbers in a listbox, they are summed up
[Code]...
What I'm trying to do is to count the number of items. Then I start my counter at 0. For each time the counter goes up, I add another row from the list box. and loops until my counter reaches the number of items in my listbox. I'm stuck intTotal. The only way I know of adding the totals is lstCosts.Items(0)+lstCosts.Items(1)+lstCosts.Items(3). But what if the user enters 4 numbers? I can't find a way around that. I think this should be a very simple question and I think only this line needs to be changed.
View 2 Replies
Sep 27, 2011
In VB.Net is every ObjectCollection Zero based except 'Collection' object itself ???
Like if you have an ObjectCollection like attachments for a mail for example, which has .Count in it, then i have seen it is Zero based
But in case of the 'Collection' object it is 1 based. 'ie dim cc as new Collection.
I am just confirming this because you can't keep checking for each collection of objects if it is zero based or 1 based, because if you use the For...Next loop, then do we have to think always if it is
For iItem=0 to ObjectCollection.Count-1
-OR-
For iItem=1 to ObjectCollection.Count
View 2 Replies
Jan 5, 2011
In an application I am working on I have created a product class which represents an inventory item. I have also created an inventory class which represents a collection of product objects. In the constructor of the Inventory class I load 4 products into a product collection. Each product consists of a code, description price and quantity.
[Code]...
View 3 Replies
Jan 12, 2010
I'm in the process of creating my own version of the Combo Box as MS version does not give me the flexibility I need, this is work fine. I just had a little niggle
The List box contains/uses ObjectCollection to hold all its objects, but it does not have the facility to inform by the way of events that an item has been added etc.
If I inherited from this collection could I add the necessary code to make this happen, I have done this in my previous controls I�ve created when I wanted this facility.
View 3 Replies
Feb 9, 2009
I am creating a glossary of words used in a study course. I would like to populate listbox with words entered into an imputbox.
View 8 Replies
Mar 27, 2009
i have a user define object which i'm initializing with data from external datafiles.... the purpose of this object is to reduce the amount of disk/data access and processing required every time i need to add an instance of this object to a collection.so, whenever i add a copy of this object to a collection, i would simply reference the "base" object, and avoid having to process all the data and perform the conversion and so on...the issue is when i add the object
Collection.add(Base_Object, Key)
the collection ITEM is a Reference to the base object and not a copy.
View 6 Replies
Oct 28, 2009
I can't figure out how to determine the type of an object in a collection. I want to do a For Each ... Next loop over the items in the DropDownItems collection of a ToolStripMenuItem. For those items that are ToolStripMenuItems themselves I want to take some kind of action. (The collection can contain other types of items, such as ToolStripSeparators). So I need to say something like: If Typeof(item) = ToolStripMenuItem Then .
View 1 Replies
Aug 30, 2010
I'm trying to loop through a collection object in vb2010.The code was originally used in Vb6 The book said that I needed to code a NewEnumerator method first in order to be able to loop through my collection. I coded the following:
[code]...
It gives an error for IUnknown, staging that IUnknown is not accessible in this context because it is a 'Friend'.In the line in the function I removed the Set since it's no longer needed.The error message for this line is '_NewEnum' is not a member of 'Microsoft.VisualBasic.Collection'What are these messages and how do I fix this in VB 2010?m_colCourse is not a system collection.
View 1 Replies
Apr 8, 2009
I have a class which extends HashSet(Of T).I am trying to evaluate some custom properties of this HashSet during execution and make decisions based on those values.
During debugging, I am pausing execution and adding a Watch on my instance of this HashSet.
The Watch only provides me with a view of the Count of the HashSet and the objects contained by the HashSet.How can I get the Watch to show me the other properties of the HashSet?
View 1 Replies
Apr 11, 2010
I know you are going to lough about this , but I guess I deserve it ...I am sure I am doing something wrong , but I can't find it out ...I have created a collection , lets sayMyCollectionI have also created a class , lets call itMyClass
View 2 Replies
Feb 19, 2008
i have a collection wherein i store an object for example i have a textbox Object which have a text value = "TEST" then i store this on the collection then i change the text Value to = "SAMPLE" then i notice that the value of the first Text Object the is also change to SAMPLE...
What am doing is an UNDO function wherein i store the object state in a collection..why does the value of the textbox object changes in a collection
View 13 Replies
Apr 2, 2009
I'm creating an open-source web browser in VB.NET Express 2008 and I've created a User Setting named History to save a collection of strings for the browsing history. However, when I try to load the history form at runtime, only the first item (of the three I added) shows up in the listbox. Below are both examples of code I have tried to use to accomplish this task.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ListBox1.DataSource = My.Settings.History
[Code]....
View 4 Replies
Oct 14, 2009
I cannot find how to display an error message when what I typed in the listbox field is not in the listbox collection.
For example the listbox contains the following items
1) Apple
2) Strawberry
3) Mango
If for example I type "Mongo" and then press tab to another field, a message will pop up saying I typed something not in the listbox. Anyone who knows how to code if text in textbox1 is not in listbox then blah blah blah.
View 1 Replies
Feb 26, 2009
I'm trying to create a favorite box in my web browser using this code in Favorites.vb
Public Class favorites
Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
[Code]....
Now I have it so when you click the add button it will put the URL in the string FavList, and place the URL in Listbox1 however I have no idea how to save it, and load it.
So the next time the user opens it, it will have the URL in the string and URL box, so when they click the URL in listbox1 it will redirect the WebBrowser. I think it works like that already I just need to know how to save it, and load it.
View 2 Replies
Mar 17, 2009
Is there a way to to combine line's 1 and 2? I only want to loop through a list of the selected items in this listbox. This works just fine, I just wondered if there was a collection of selected values returned that I could use to avoid having to do it this way.
For Loop1 = 0 To MyListBox.Items.Count - 1
If MyListBox.Items(Loop1).Selected = True Then
...
End
Next
View 2 Replies
Sep 21, 2007
Is it possible to have a texttbox autocomplete source set to a listbox's collection? I see:
FileSystem
HistoryList
RecentlyUsedList
AllUrl
AllSystemSources
FileSystemDirectories
CustomSource
in the texxtbox's autocompletesource property but are unable to make it happen.
View 3 Replies
Oct 17, 2011
using a Binding Source to Bind my Collection to a ListBox? I can bind the class to the binding source, but im not sure how to let it know what type of list it is, or how to display the correct item.
I'm trying to get the listbox to display the ItemNames. Here's my class and collection class.
<System.Serializable()> Public Class SurveyItem
Private itemNm As String
Property ItemName() As String
[Code]....
View 1 Replies
Jun 8, 2009
I'd like to store a set of key/value pairs in the application settings of my ASP.NET web app, but I'm not finding a straightforward way to do that. For example, these two questions tell me that StringDictionary etc. won't serialize to XML and suggest that I'll have to roll my own implementation. But it seems like this should be easier to do; after all, web.config is XML and < applicationSettings> is essentially a collection of key/value pairs, so it feels like I'm missing something obvious. Given my specific case below, do I really have to roll my own serialization, or is there an easier workaround?
The web app in question is a basic contact form that sends email to different recipients based on the value of a parameter; e.g. [URL]...The goal is to be able add or remove recipients (or change their addresses) by editing the web.config file so that I don't have to recompile and can easily maintain different configurations in test and production environments. For example:
// I can use something like this for the sender address SmtpMsg.From = New MailAddress(My.Settings.EmailSender)
// And then just edit this part of web.config to use different addresses in different environments.
<setting name="EmailSender" serializeAs="String"> <value>webcontact@exampledomain.com</value>
[Code]...
View 2 Replies
Jun 10, 2009
I am moving from VB to C#. I am trying to loop through a collection class which is a collection of data classes but I can't seem to get the actual values out of the data class properties(find the correct code to do so). I have a method that loops through the collection class(Contacts) and saves each record(Contact). I am using reflection because my method will not know if it is Contacts class or a Customer class and so forth. Here is my code in VB(watered down)
Public Function SaveCollection(ByVal objCollection as Object, ByVal TableName as string, ByVal spSave as string)
Dim objClass as Object
[Code]....
The C# code keeps returning null. In my locals window I can see the proprties on the class on objClass and the value of the propery but I can seem to figure out how to access it through code. I used the DictionaryBase because that seems to closely match would I need to do. My data class(Contact) has a bunch or properties that match the field names in the database of the Contact Table. After I get the propInfo variable set I then set up my SQLParameter with the fieldname, datatype etc and then set the value to the propInfo.value.
View 5 Replies
Feb 8, 2012
I like the PHP way of doing things but, it seems I am stuck with using a Collection of Object's to store/retrieve the data I need. I have my Collection loaded with my Objects's and the code to iterate through the collection, my problem is I am unable to retrieve the "key" as it would be called in PHP (I believe in this case it is actually the name of the object).
Consider the following example:
Dim xDoc As XPathDocument = New XPathDocument(fName)
Dim xNav As XPathNavigator = xDoc.CreateNavigator()
Dim sender As XPathNodeIterator
[CODE]...
As you can see, I am navigating an XML document, and creating an Object with some Key/Value pairs. The Object would look something like this if it were in JSON:
{"name":"John Smith","address1":"123 Anywhere St.","city":"This City","state":"FL"}
When I iterate though the Collection I can only get the value of the object, but I need the Key, in this instance I want "name","address1","city","state" to be stored in a variable for each iteration.
View 2 Replies
