Populate A Combox Box With Counter Object?
Feb 27, 2009How do i populate the combo box with counter object like in add counter dialog box in Perfmon in Xp.bottom line is i would like to get a dialog box like in perfmon add counter
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Populate Combox Based Upon Selection Of Another Combobox?
May 17, 2012I'm new to programming and I'm using vb.net 2010 and I'm stuck with this problem. So here are the details, I have 2 tables in my database, a product table and a category table. In my product table I have product no, product description and category no. In the category table i have category no and category desciption. So this is where Ive been stuck for the entire day, I want my combox(product) to populate based on what is in the combobox(category). For example I have "Chair" in my combobox(category), then what would appear in the combobox(product) would be "sofas", "dining chair" etc.'the part below is where the program will read the category description from my database
Sub fillcomboDesc()
Dim fillcatDesc As MySqlCommand = New MySqlCommand("Select catDesc from category;", connection)
[code]....
Populate Data Into Datagridview With Combox In It And Then Save?
Jun 10, 2011how to populate data into datagridview with combox in it and then save. Using Visual Basic 2005.I have to populate CrewID, CrewName, Address, Position, ReplacementCrew, ReplacementCrewPosition from employees.When the data was populated, I have to click the ReplacementCrew Combox and find the CrewID of employee and display the Position to ReplacementCrewPosition cell. Then save.
View 14 RepliesVS 2008 Object Reference Error On A Counter?
Dec 22, 2009Under normal circumstances I am not TOO bad at trying to figure errors out. However, I can't seem to understand why I am getting the age ol' "Object reference not set to an instance of an object error" in this lil bit of code.
This is where I define my 'intTotalRecords'
Connection.Open()
Command.CommandText = "SELECT * FROM CompanyTable"
[code].....
Create A System-wide Independent Universal Counter Object Primarily For Database Keys?
Apr 5, 2010I would like to create/use a system-wide independent universal 'counter object' that can be called via COM in a thread-safe manner. The counter object will be passed an ID to identify which counter to return, handle the counting, 'persist' the count (occasionally), have reasonable performance (as fast as possible) perhaps capable of 1000 counts per second or better (1mS) and be accessible cross-process/out-of-process. The current count status must be persisted between object restarts/shutdowns.
The counter object is liklely to be a 'singleton' type object implemented in some form of free-threaded dictionary, containing maybe 10 counters (perhaps 50 max). The count needs to be monotonic and consistent, (ie: guaranteed unique sequential values).Each counter should have a few methods, like reset, inc, dec, set, clear, remove. As a luxury, I would like to have a variable-increment (ie: 'step by' value). To support thread-safefty, perhaps some sorm of critical-section or mutex call. It just needs to return a long/4byte signed integer.
I really want something that can be called from anywhere, including VBScript, so I figure COM is my preferred solution.The primary use of this is for database keys. I am unable to use autoinc or guid type keys and have ruled out database-generated counting systems at this point.I've spent days researching this and I have really struggled to find a solution. The best I can find is a free-threaded dictionary object that can be instantiated using COM+ from Motobit - it seems to offer all the 'basics' and I guess I could create some form of wrapper for this.
[Code]...
VS 2008 Error "The Requested Performance Counter Is Not A Custom Counter"
May 20, 2010I have this code sample from a book I'm reading which looks to be incorrect:
Imports System.Diagnostics
Sub Main
Dim pc As New PerformanceCounter("PerfApp", "Clicks", False) 'excepiton here
pc.Increment()
counterLabel.Content = pc.NextValue().ToString()
End Sub
There excepion message I get is: The requested Performance Counter is not a custom counter, it has to be initialized as ReadOnly. I looked for a property to see if I can set it but couldn't find one.
Populate Object With Data?
Mar 13, 2011I'm looking to populate an object then display the data to labels.[code]...
View 2 RepliesPopulate Listbox From Items In List Object?
Jan 4, 2012trying to write an updateview method to basically clear the contents of the current listbox and then loop through a list of objects and pass 2 items from each of the objects in the list into the listbox.This is what I have so far
vb.net
Public Sub updateview()
holidaylistbox.items.clear()
[code].....
.net - Populate An Array Of Object Based On DataReader Data?
Jun 30, 2010I am not sure how to phrase my question properly but I want to achieve something like this.
I have a class named Products public class Products
private ID as Integer
private Name as String
Public Property ProductID()
Get
Return ID
[Code]...
When I do the same, I am getting an error "Object Reference Not Set to an Instance of an Object.
Populate A Data Object Containing 30+ Properties From A Database Table
Sep 21, 2010I have a need to populate a data object containing 30+ properties from a database table. I could create a simple class containing a public variable for each of the required properties, but I don't want to.
Is the following code a bad idea:
<Serializable()>
Public Class DtoEmployee
Public EmployeeId As String
[Code].....
Populate System.Collections.Specialized.StringCollection Object From A Text?
May 6, 2010Say I have a text file I want to load it to a System.Collections.Specialized.StringCollection
object dim a as System.Collections.Specialized.StringCollection
set a = a contains many systems System.Collections.Specialized.StringCollection object.
Each line in text.txt go to an element in a.
VS 2008 Populate Object With List Of Windows Users Without Changing Datatypes?
Jul 25, 2011PROJECT TYPE: Windows Forms Application
LANGUAGE: Visual Basic
.NET VERSION: 3.5
IDE: Visual Studio 2008
OPTION STRICT: on
OPTION EXPLICIT: ON
I need to populated a ComboBox and a CheckedListBox with a list of the Windows Accounts on the host computer. I also need to the user to be able to apply settings to the users individually. Thirdly, I need to find a way to add a startup registry key in the CURRENT_USER for a different user than the "Current User" (For example: User1 is an Administrator. User2 is a Limited Account [can't modify registry]. User1 needs to add Registry key to User2's "CURRENT_USER". This is a parental control application so the Admin accounts need to be able to access the registry from all users without affecting all users at once. I do not have any code to paste because I still have not the foggiest idea of where to start. I think it probably has something to do with an array (I have no experience with arrays whatsoever) but I am stumped from there. I'm a new, self-taught programmer so I speak idiot at times,
Summary of Questions
1) How do I retrieve a list of Windows Users?
2) How do I populate the objects above with such a list?
3) How do I interact with the items on that list (specific user accounts)?
4) How do I modify another user's CURRENT_USER Registry key?
.net - Combox Box Within A Datagrid
Sep 12, 2011I have a combobox with a datagrid, but I'd like the user to be able to type into the combobox like usual; At the minute it's a fixed dropdown. Here is my code:
[Code]....
Can't Add Combox To Datagrid
Aug 25, 2005I saw for adding combox to datagrid still Unwritable.[code]...
field has order number 1. Name of this column is "Name"' Datagrid ComboBox ValueMember field has order number 0. Name of this column is "PubID"
Combox Box From One Form To Another?
Jun 21, 2010Is there anyway to carry one combo box from one form to another without the use of loops? I'm trying to figure out if it would be easier to represent a comb box in a new form, or if it would be easier to show it in a print preview window....
View 2 RepliesAutocomplete A Combox From Dataset?
Oct 28, 2009I have a couple of texbox and combobox controls that are bound to a dataset. I can scroll this with the a bindingnavigator. But I want to have the combobox do autocomplete from the dataset. For example, if i type a "D" in the combobox bound to the 'ClientName' column of the 'ClientInfo' table,i want the comcobox to display all (or maybe the top 20) names that start with a "D". If i then type an "E" I would like the list to show all names starting with "De" and so on.
I have tried to bind the 'autocompletesource' of the combobox to the 'ClientName' column, but that did not appear to do anything.I am reasonably experienced with VB .Net, but totally new to database and data centric applications.
Combox With Datagrid And Query?
Jun 22, 2010I have a VB.NET Windows form with a datagrid on it. I also have a combobox on the for (outside the datagrid).The purpose of this combobox is to limit or filter the records shown in the datagrid
database is Access MDB
table name table1 field name = field1
another question
i have 2 tables table 1 for customers include cust_code and cus_name
in table2 emp_name cus_code
i need to get the data from table 1 with information in table2 cus_code
Combox With Text From Txtfile
Feb 1, 2012I have a code for populate a combobox with the text from a txtfile.[code...]
But i have about 20 comboboxen en i want all of them with this text from the txtfile.
(Every Combobox in the Form).How do i do that ?
Events In A Combox (in A Loop) (again)?
Mar 22, 2010First i don't know how many textbox, checkbox or combobox i have in my form, because this been doing in a loop.Then i want to add some events in this elements.
For Each ctl As Control In Me.TabPage3.Controls
If TypeOf ctl Is CheckBox AndAlso ctl.Name.StartsWith("rtpcheckbox") Then
Dim ctl_X As CheckBox = ctl
[code].....
Treeview With Combox Control?
Jul 23, 2009Does anyone knows how to achieve UI like the attached image. I need to have a Treeview control which will have nodes & child nodes and each node should have a ComboBox control next to it.
View 4 RepliesObject Null Combo - Error When Try To Populate Some Combo Boxes With A Value
Nov 16, 2011I am getting an error when i try to populate some combo boxes with a value, the combo box has values in and the right amount the code is getting the right number.
the error msg is "Object reference not set to an instance of an object."
Add A Value And Text To Combox Control Without Datasource?
Nov 11, 2009I want to add items to my combobox but am not able to add a value and a display text.
View 3 RepliesMultiple Combox Delete From One If Selected?
Oct 7, 2009I have a databse program that is using 3 comboboxes all pulling same data from a dataadapter. I would like it if after a selection is made in one combobox it no longer becomes available in the other 2?
View 5 RepliesVS 2005 Combox, Valuemember, Displaymember
Apr 12, 2009My question: i have a combobox which i would like to populate with data from a database. The table looks like this: pkIntCompany (the pk) & chrCompanyName You see nothing special.
I would like all the records in a combobox. When a user selects one of the value, i would like to show the pk and the combobox in a textbox (seperate). Is there someone who has some example code?
VS 2010 : Add Combox Items Through Input Box?
Nov 27, 2009I would like to add the text you add into an input box go to a combobox.I tried
Me.Combobox1.Items.Add = InputBox("Please enter name.", "Name?") 'text[,title[,defaultresponse]] (Returns "" if user pressed Cancel)
But I get an error.
VS 2010 Search Database Using Combox?
Mar 24, 2011How can i search my database using a combobox were he will suggest list of names in the combobox list . It will search all fields in my database. My DB is created in access.ex. i type Kev then the combobox list will have Kevin then Kevlan on its list knowing that Kevin and Kevlan are in my database .
View 11 RepliesC# - Loop Through A Combox Values List And Select One Of Them?
Mar 24, 2012How do I cycle through a ComboBox Values list so I can check each value and select one of them efficiently?
Examples in C# or VB.Net welcome.
How To Save All Combox Items In Settings String
Mar 26, 2009How to save all combox items in my settings string.... Without.....IO.StreamWriter..
View 16 RepliesMake Checkedlistbox Value Change By Selection Of Combox Value?
Nov 3, 2011I know that sounds strange but I came across this website today that uses this ability and I've been going nuts trying to figure out how they do it.
The website is [URL]
Also here is a screenshot of the options I am speaking of
There is a combolistbox that has a list of topics.
Depending on what topic you choose will determine what checklistbox option will appear in the check list box.
What are they doing there to create that option? I was thinking that maybe they created 20 checkedlistboxes and then if the selection of the combolistbox is "THIS" then they set the getfocus to that checkedlistbox but that didn't quite work for me.
Refresh Combox With Bindingsoure But It Cant Return Result
Aug 10, 2009I use this code to refresh my combox with bindingsoure but it cant return result.
Private chucvudatabindingsource As New BindingSource
chucvudatabindingsource.DataSource = dat.getChucVuCB()
cobchucvu.DisplayMember = "ChucVu"
cobchucvu.ValueMember = "ChucVuID"
chucvudatabindingsource.CurrencyManager.Refresh()