Add Multiple Items To A Dynamic List?
Apr 19, 2010How would I add multiple items to a dynamic list without having to use the .Add method for each one?[code]...
View 10 RepliesHow would I add multiple items to a dynamic list without having to use the .Add method for each one?[code]...
View 10 RepliesIf I have 3 times selected and when I click "submit" for example I want all my selected items to be removed, but when I try to do this only my first selected item is removed.
ListBox.Items.Remove(ListBox.SelectedItems)
How do I remove all 3 items from the list box at the same time?
On my form I have 3 textboxes. They get their data from a database query. The trick is the database may return 1 result or up to 3. If the query returns only 1 result, I want the first textbox populated, 2 results, 1st and 2nd textbox populated, etc... I also want to be able to track CurrentItemChanged Event for updating purposes. My initial thought was to use a list object as the binding source but how would I cycle through the list if it returns more than one so that I can assign the values to the 2nd and 3rd textboxes or if data is entered in to a blank textbox I want the currentitemchanged
View 6 RepliesI'm trying to add multiple items to a list box from a database but I'm having a few problems getting it to work. Below is the code i have so far but for some reason it will only add the last field in the database to the listbox and not the remaining 12.
View 3 RepliesUsing Visual Basic in Visual Studio 2008, I have created a Windows form with multiple tabs and questions. Each question has an associated drop-down listbox that the user will eventually click on to enter his or her response. My client has now informed me that she wants to change the standard responses in each response box. There are well over 100 drop-down listboxes, all with the same items, and they all must be changed.
I originally inputted the items using design view. Would someone please tell me if it's possible to edit all of these boxes in the design view simultaneously? When I control + click on more than one box, the Edit Items option that is normally available disappears. Is there a way to do it in code in a manner that would save back into design view?
I've never really used the Check List Box in the past, however, for the recent program I am developing, I am using this control rather than individual check boxes scattered across the form.Anyway, I want to be able to program through code which items get checked in this checked list box. Specifically, I have a variable that contains the text of each check box that I want checked.With a normal check box, I can simply say:
Dim strNames As String
strNames = "John Doe, Mark Johnson, Mike Brown, Cindy Smith"
If strNames.ToString.Contains("Mike Brown") Then[code]....
No matter how I try, I can't seem to create a nice and clean algorithm for doing the following:
System.Array (or generic List) data of System.Object
System.Array (or generic List) xval of System.Object
System.Array (or generic List) idxs of System.Int32
[code].....
i have managed to add menu strip items and add a Click Handler to it fine But now i am going to remove the click handler, and want to add sub items in the menu instead the current code i have so far..
[Code]...
I have a listbox that I am dynamically populating but I cant seem to add a value to the items.. the code is below
Small Issue also it would be nice to put both these tables into 1 dataset instead of the 2 I am using
[Code].....
I'm looping all the properties in an object via reflection:
For Each p As PropertyInfo In values.[GetType]().GetProperties()
If p.CanRead Then
'Do stuff
End If
Next
how to determine whether the property in question is a generic List(Of T)? If it is I need to loop the list itself.
I've experimented with GetType and TypeOf but have not managed to get anything working.
To clarify, I want to keep this generic. I do not want to specify the type of T, I need to loop the list items and call the ToString method on each item. T could be one of a number of different types (application specific reference types). Is it possible to do this without specifying types?
(VB.NET 2005 with .Net 2.0)
This program is supposed to allow the user to check items in a checked list box. If the item is checked, it goes into the Completed List Box on the right. The program then adds the unchecked items to the Pending list box on the left. I keep getting placement values (e.g. O,1,2) instead of the strings (e.g. "Key Returned") in the list box results (see photo attached)
Public Class frmCheckOut
Dim i As Integer
Dim cleaning As String = "Cleaning Inspection"
Dim damage As String = "Damage Repaired"
[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 am attempting to read the results from a SQL query into a List(Of) and I can see the List.count while adding items to the List increments, however in another part of my code when I am attempting to read the List the List.Count returns 0. My List is as follows:
[Code]...
I need to be able to hide 2 options that are displayed from my dynamic bulletedlist (which is built inside of a DetailsView). Every time I try writing a loop through the BulletedList, I get an error saying that it is not a collection type, so I thought I could loop through the DetailsView to find the items I want to hide.
I can't change the SQL because this particular bulleted list gets used on 2 different pages, it's just that on one, I only need to show 2 of the 4 items that are associated with the ID.[code]...
I have an error panel that is subbed in to a page if an error goes wrong to gracefully handle and display errors.Currently, I am just appending the error messages to a string and pushing that to a label. If you have multiple errors, this gets messy.I'd like to push each error to a list item in a bulleted, unordered list.How can I dynamically generate, from a vb codebehind file, new list items inside of an undordered list element?
View 2 RepliesI have two generic lists, named ListA and ListB. Both ListA and ListB could potentially have duplicate items. What I would like to do is use LINQ to grab the items in ListB that are not in ListA, but I'm unsure how to do so.
View 8 Repliesi want to search item A (from a list of X items) in list B but i want to get the item not found example Search ITEM A in LIST B if not found then return a print....if found continue with ITEM B..and so on.
View 5 RepliesThat was probably bad title, but I'll illustrate what I'm trying to do. I have a method in a class that I need to call several times. The method returns a List(Of String). I'm just grabbing some information from a database.
VB.NET
Public Function GetTestList() As List(Of String)
Dim int As Integer = 0
[code]....
I have a List(Of MyObj), and I want to iterate through that list and compare each element to all other elements in the same list, excluding (if possible) the same element. I have a solution that works, but it's slow and uses double For loops. It may possibly have also summoned Cthulhu from his sleep. This below is a sanitized version of what I have:
Dim MyList As New List(Of MyObj)({Obj1, Obj2, Obj3, Obj4, Obj5, Obj6})
If MyList.Count > 0 Then
For i = 0 To (MyList.Count - 1) Step 1
[code]....
I am writing app in vb.net
I have two variables one with list of RoomRate and other with list of RoomTypes.
We have RoomRates and RoomTypes linked with RoomTypeInfo variable insite the RoomRate.
So how do i find the RoomTypes which donot have the RoomRates Defined.
My Sample Code:
class RoomType
property UIN as integer
property Title as string
end class
[Code]......
I want to know how to test the 1st list box if it has items more than the other list box but by one item, here is what i have: If lstInvisibleTv. Items.Count > lstInvisiblePc.Items.Count Then it works good if the lstInvisibleTv list box is greater than the other list box by one but it also works if it is greater the other one by one or more which I do not want. I want it to work just by one.
View 3 Repliesi am trying to create a list of list in that i would like to work on multiple accounts at the same time. lets say i have 5 accounts. every account has a seperate name. each account has a few fields. so i though of having a list of bookkeeping (with 5 accounts) and a list of accounts (with expense, income, tax, status, etc as fields). [code] and if the idea of using list of list works how do i loop through both lists.
View 6 RepliesI create multiple dynamic pictureboxes and it are to many to add them all manually, is there a way I can e.g. use an integer which adds up every time a new picturebox is made. Then I want to add the same code to every picturebox. Now it creates the picturebox and moves it to the next spot and doesn't create a second. I am using this code if its helpfull:
[Code]...
I am migrating over to VB2008 and I get it except for printing. I can print but I have lost a lot of the methods to print dynamically and I need to know the secret not to pull my hair out doing this. These are the circumstances I need to fill:1. Multiple Document Interface (Parent Document) holding multiple forms.2. Each will print from their own form page but this is the scenario I am trying to accomplish which I did rather well in VB6:Dynamic page length. As it runs through the data and deciding what needs to be printed. All print statements are mapped. currenty =y currentx = x.
a. Calls private sub HEADER to print header (eg store name address) resets currenty= 0
b. Calls private sub BODY based on selections answered. Not answered then omitted.if currenty > 9 inches and you are not done then call private sub TRAIL then HEADER and continue in the BODY recheck for currenty >9 inches and not done printing
c. Calls TRAIL to finish off.
Now I have been able to do all this using the Imports Microsoft.VisualBasic.PowerPacks.Printing.Compatibility.VB6 statement but that is using the old methods and may or may not be usable in 64 bit mode processing.When I use the printdocument.print() method , everything must be handled inside of the printdocument events. Going out of the routine to call another section causes the document to end and start a new page. Since gosub routines are not allowed, it is almost impossible to jump around to make this run properly. Am I missing something???? Can I form the document in different subroutines and pass a completed page to the printer with graphics??
I can do this by constructing the document in a picture box sending all the print commands go to an image the old VB had a more stable image container that did not disappear if minimized or another window openened over it by auto-redraw. I thought about saving it as a .jpg and them printing but that is still just crazy. There has to be a simple way of constructing multiple pages that I am just missing.
I have to ask my first question at some point, so here she goes.I am trying to create a dynamic list of objects. The objects will have several types (String, Integer) associated with them. Currently I am forming a Collection as I instantiate new objects.Is there a prefered to map this collection to, say, a Datagridview? Will I have to Iterate through the collection and add the rows at each iteration?Would I be better served using an ArrayList or something else over a Collection?
View 8 RepliesI'm having a problem adding multiple dynamic controls. the problem is that I can add one no problem, but when I try to add more it only adds one with the label's text = the last file name in openfiledialog. [Code]
View 9 RepliesI have a program that will let you open a certain table in the database and query it on a child form in a MDI parent form. Of course the child form is a new instance of an existing form.The thing I want to do is that the opened table in the child form cannot be reopened again in the other child form. So I did was to create a childform name on every new instance of a childform depending what is the name of the table.
The first thing I did to do this restriction is to put the names of the opened table to an public array and when the user tried to reopen the table, the program will check if the childform name is already existing... and if it exist it will not let the user to open the table in new childform.When the childform is close it will erase it's name to the public array. And it can be open again.If you don't understand what I want to do this is the situation for example in a microsoft office when a word document file was open it will be put in a childform, and when the user tried to open the word file again and still the word file is open in the microsoft word the application will tell it's user that the word document file is still open.
I have Joined two tables into a datagridview and i want users to be able to update the table values but i have this error,which is the title of this thread.Is there any alternatives of updating a joined table in datagrid view? here are my codes
Private Sub Search_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
con.Close()
Dim cmd1 As OleDbCommand = New OleDbCommand("SELECT LECT_NAME,LECT_ADDRESS,LECT_CONTACT,SUB_SEMESTER,SUB_ID,SUB_NAME FROM
[code]....
Okay this is the simple thing I'm trying to accomplish. I can get richtextbox1 to add to listbox 1. but i cant get both to add. the compare works fine. I'm stumped.
View 3 RepliesI have multiple user controls (the same one dynamically added to a form 4 times), and one class. I would like all of the user controls raise events in that one class. For example, if any of the user controls are clicked, I want it to send a string to the class to be processed and show a MsgBox "Control name was clicked"I am doing this as an exercise to reduce repeating the same code over and over directly in the control, and to avoid creating the class over and over to accompany each user control.
View 1 Replies