when I phase a specific column from a table using a combox then if I delete a data from the combox the respective record is deleted from the table.but the column value which I delete from the combox is still there.I want with the table the combox is also updated after delete record
View 1 RepliesI 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 RepliesI have a List "MyList(of MyStruct)"
[vbcode]
Public Structure MyStruct
Public ID as Integer
Public Value as Integer
End Structure
[/vbcode]
At some point I need to update the Value of the member with ID=X, but I'm stuck.
Do I need to search for the index of that member using FindIndex and then set the value like MyList(index).Value=Something?
Or
Find the member itself by using Find, but how would I then set the new value?
VS 2010 [RESOLVED] List(of T) update data of a specific member
View 6 RepliesHow 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.
I have a list box which displayed the var_field from the database. when the user select a data from the list box and press delete the data should be delted fromt he l;ist box and the row from the database. Im using the following code. but it shows some error called "Object reference not set to an instance of an object."
Private Sub Deletebutton_Fielddetails_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Deletebutton_Fielddetails.Click
Dim form As New Fielddetails()
[code]....
how 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 Repliescolumn name = CustomerName
SQL server database name = SQLDEV6.
I have been given a task to create a application in vb that is supose to load data from a table named tblCustomers from a DataBase.
I have a vb.net form to add, modify or delete the product list..i have a datagridview in which i m loading data from sql server datatable...now i have a text box which accepts code for the product..i want that when i press a key, all data starting with that key should be highlighted in datagridview.....
eg
i have product codes
A001
A002
A003
C001
D001,, etc..
Now i press A in text box...in datagridview all data with A should be highlighted
how i can connect to an access database and fill a combox with data of a column?
View 1 Replieshow do I overcome it? I have created a class and compiled into .dll This code
[Code]...
In Visual Studio 2008, if I do this:
[Code]....
Does anyone here know how to get the above to work WITHOUT warnings being generated?
In the following code i get a warning at line 59:Warning 1: Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated.and.. At line 78 I get this Warning:
Warning 2 Property 'SelectedCustomer' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used.
The program compiles and runs well, but i cant' undesrtand the reason for these warnings. Any Idea ?
1: Public Class Form1
2:
3: 'Form level members
4: Private objCustomers As New ArrayList
[code]....
Cannot appear to be able to get this function to not have the above error.Private Function GetIncidentActions(ByVal FromAgentID As Integer, ByVal ToAgentID As Integer, ByVal incidentAction As Integer, ByVal ActionDate As Date) As String
[Code]...
Another program I am working on for fun, I am basically shuffling a list inside a listbox, what I want to do is delete the rest but not sure how to go through with that. At the moment I have this: [code] Just contains the code, declarations outside weren't included.So anyway, once clicked, it will call on the function to basically shuffle in a for loop, I was wondering if I should (or how should) create another function and call it in the click button or have just a loop in the click button so it deletes half the list. What I am doing is I have 20 list of items, I want the program to shuffle the items and then deleting the lower 10, meaning, if I had 10 items and wanted 5 top, I'd want: 0, 1, 2, 3, 4 and deleting 5, 6, 7, 8, 9.
View 7 RepliesI have a question that I really hope someone can shed some light on for me, as this is driving me crazy trying to figure this out. Consider this code..
'declare and allocate
Dim lstNumbers As New List(Of Integer)
Dim nCount As Integer
[code]....
I notice you have an example code of listing groups Ad computer Accounts are a member of in c#, do you have an example in vb
View 2 RepliesHere I have a code to search a list if a word appears in a member information. What I want is to do a search if, in the phone numbers of members, one of them starts with 0 or 1 or 2 etc. ... How? I have this code to search on a word:
[Code]...
I have a combo box that is populated with a list of objects (corresponding to all employee rows from a database that meet the criteria IsTech). These are not entity objects though, I have created my own class that stores the member values of each row from the DB. I have set the DisplayMemberPath to EmployeeId so the Combo box display the EmployeeId ( an integer ) member of my object. Ie. right now there are only 2 IsTech employees in my DB so the combobox displays the numbers 3 and 8 ( their EmployeeIDs).
[Code]...
VB Reference parent member of a class through a child when using List Of(T)?
View 1 RepliesMy apologies I have posted this in the wrong catagory It should be in VB.net, my mistake)Hi guys I posted this question at the end of another topic I started but I think it will be over looked as the origional topic was solved of the dreamincode community You must all be getting sick of my quexstions by now haha I suppose you don't learn if you dont ask.
Anyway I have used the delete sql method to delete data from a database, I want to refresh the data in the form after the record has been deleted. Do I have to close the form and then open an new instance of it? or is there another way I can refresh the data?
[Code]...
I'm "cloning" objects in my code. For instance: objClone = objOriginal My question is: Does the assignment operator in VB.NET 1.1 do a member-by-member copy of the objOriginal to objClone or does objClone simply point as a reference to memory referenced by objOriginal?
View 3 RepliesI have a combobox that is bound to a BindingSource that contains a custom object with multiple Properties.
Is there a way to access a Datamember that is not displayed in the combo box and display it elsewhere. For example, When a user selects a name from the combo box, texboxes (or Labels) populate with Title, PHone, email, etc. All of this data is loaded in the custom object that is bound to the datasource so the info has already been pulled from the db and is in memory.
I've been working on a program lately. On the form load it loads a list box with a list of names from a .txt file. It's a sign in form, so when people click their name then the button it will write to a .txt file their arrival time, and the folder is their name. I can make it do it one at a time, but that's so inconvenient. I have the list box set so it accepts multiple selections, but I need to make it write the time for everyone.
how to delete the selected name from the list that would be extremely helpful, that way the person isn't signed in multiple times.
i changed a class variable to shared so i can access it in all instances of the class, but it caused an error. what is causing this, and how can i fix it?
Private
Shared img As Bitmap
Me
.img = bgImage
I have 2 tables Table A & Table B Table A has the table values that I want to be populated in a datagridview control.The challenge is that column 1 in table A contains an ID(foreign key) to a name field that is a located in table B. I need the datagrid to have the first column be a combobox that displays the names(from Table B) that are already in table A via the ID's, but reference the populating values from Table B. So that when you bring down the combobox you would be choosing from Table B data but populating table A with the ID and you would see a name there instead of an ID.[code] How do I populate my DS dataset with Table B? And how can I create a link to these two tables using a bound datagridview control?
View 1 RepliesI have imported:
Imports System.Xml.Linq
Imports System.Data.SqlClient
Imports System.Data.DataTableExtensions
[code].....
I recall being told by a professor the following is bad practice. But it makes stepping through code a lot less tedious. I'm just solicting comments on pros and cons:
Friend Class MyClass
Private isEmpty As Boolean
Public Property IsEmpty() As Boolean
[code]....
Private Sub setView()
With lvwLogs
.AllowColumnReorder = True
.FullRowSelect = True
.GridLines = True
[code]...
I am getting the same compile error for the forms with setview. I am thinking it concerns with listview. It highlights the public sub setview().
Dim myArray() As Integer = {a, b, c, d, f}[code]...
Based on the code above i would like to remove the largest and smallest element from the array list and then put it into a new array list.