Looping Arraylist Adding To Textbox
May 19, 2009
I'm trying to do is take each item from an arraylist, that is populated through a structure read from textfiles, then loop through them adding each result from the arraylist to a new line in a textbox. What I'm getting is that it's adding only the last item to the textbox rather than listing them, yes I have multiline set to true. Because of the potential size of the arraylist I have it running in a background worker. Once it's complete then I'm trying to populate the textbox. All the code is working fine to that point it's just populating the textbox correctly is my problem.[code]I've tried adding vbnewline, vbcrlf, cblf at the end of the statement as well as placing the text statement in both the runworkercompleted sub as well as in the delegate with the same result.
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May 20, 2011
I have a function which iterates through the TextBoxes in my form (and its child controls) and adds each TextBox's name and text to an ArrayList using a structure I called valTxtBox.
Here's a snippet of the
VB.NET
Public Structure valTxtBox
Public nome As String
Public texto As String
End Structure
[Code] .....
Now, the problem is that if I call Clear() for valsTxtBox in the getctrls() function, not all the elements get added to the ArrayList. However, if I don't call Clear() it works just fine. BTW, I'm using VS2008 express which might be relevant.
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Jan 11, 2012
I have a problem in Treading.I have a code like this;[code].....
I want to change ListBox1 with ArrayList. But I couldn't find how to use adding a string to ArrayList in tread.
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Apr 20, 2009
i am a student i have an assignment in a class in which i am totally lost PLEASE HELP
1) Code the necessary instructions for the ADD button which is instantiating an object and adding to a collectioni
2) Code the necessary instrutions for the DEL button
3) Code the rest of the SAVE button to allow us to continue to edit and save the customers.[code]
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Jun 2, 2012
Public Class BasicInformation
Public maleFirstNames As New ArrayList
Public maleFirstNames.Add("John")
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
I want to declare a set of arraylists and the base values so that they are available throughout the entire program. When I set the declaration for the array list as public and attempt to add a value to the array the add.("john")is underlined in blue and it says end of statement is expected.
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Jul 15, 2011
I'm wondering if this is possible, I want to be able to call functions from within the program itself by means of an ArrayList? I want to be able to do something such as:
FunctionsList.Add(SomeFunction)
FunctionsList.Add(SomeSub)
For Each Function in FunctionsList
Call Function
Next
Would this be possible? It's important for a project I am working on.
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Jun 20, 2011
i am trying to add items to a Listbox, but first i need to know if the item is already in ListBox. I know how to compare the selected item in a combo with the arraylist. I use this
If Indicadoreslist.Contains(Me.ComboBox2.SelectedValue) Then
MsgBox("It exists")
Else...
[code].....
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Jan 5, 2010
I am having issues adding a custom object to an arraylist at runtime.
Details of what Im trying to achieve.
My object is Fixture which represents a light. My light has the following properties:
Name, isMover, HighlightValue, UserNumber, Channels.
Channels is a dynamic arraylist which lists all the different channels of the fixture. A channel could be the lights colour or its intensity. A channel has the following properties:
Type, FeatureGroup, Value, Universe, Address, Slots and Offset.
Slots is the same again, breaking down to another ArrayList with more details.
Code:
Private Sub Patchingtest()
Dim TestFixture As New Fixture_Structure
Dim Intensity As New Channel
[Code].....
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Jan 24, 2011
I am trying to add values from Arraylist to particular column of grid view.
As:
If (Arr_NewContacts.Count > 0) Then
dgvStayout.Rows.Clear() ' **GETTING ERROR HERE**
dgvStayout.Rows.Insert(0, (Arr_NewContacts.Count - 1))
For i As Integer = 0 To Arr_NewContacts.Count - 1
dgvStayout.Rows(i).Cells("Name").Value = Arr_NewContacts(i).ToString
[Code] ......
Datagrid property like AllowUserToAddRows and AllowUserToDeleteRows is already set to true.I am using above code on lost focus event of one of text box.
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Jul 5, 2010
I found that if using ArrayList, all clone/CopyTo/Add command are shadow copy, not separate copy. How can I do such that after an ArrayList A is "copied" to ArrayList B, change in ArrayList A will not reflect to ArrayList B?
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Feb 17, 2011
Looping code is adding my values multiple times
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May 17, 2009
I have a form with a listbox. I'm adding items to the listbox through a file that I saved. When I open the file, I want each line/string in the file to go in as a separate item in the listbox. I've gotten it to work so far but only with 1 string. I need to loop the part where the file is being read to be able to add all the strings that are within the file to the listbox. How do I do this? So far, this is the code I have:
VB .net
Private Sub OpenToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OpenToolStripMenuItem.Click OpenFileDialog1.Filter =
[code].....
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Aug 4, 2009
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim dt As New DataTable
Dim da As New SqlDataAdapter[code].....
i get values in textbox3 ......like 1,2,1,1,4 etc in each loop...but m not getting addition of those numbers...where m i wrong?
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Oct 15, 2011
I have a form with 24 textboxes incremented by a letter. example: txtDimVala1.text, txtDimValb1.text, txtDimValc1.text, etc. I created a code to check each textbox, but there must me a more efficient way to loop it. I have tried a few loops but I cant get them to work looping through the different textbox values.
[Code]...
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Feb 8, 2012
I am building an application to show an arrayList in a textbox and then sort the array in a listbox, I am initailizing the ArrayList via the application.
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Mar 19, 2008
I develop an application in vb.net and mysql server for data storage. I have a problem in my database I have something like 5000 codes stored like code, description, quantity, price, firm. I have a function to extract all the codes from database , it takes about 4,4269 ms to extract all 5000 codes with description and everything... in an arraylist. When I want to put all codes from arraylist in a textbox autocomplete, it took about 2305,400 ms and I think this is a big problem the function to put in textbox autocomplete all the items from arraylist:
Code Snippet:
Public Sub PopuleazaTextBoxDinListaCoduri(ByVal txtbox As TextBox, ByVal list As ArrayList)
txtbox.AutoCompleteMode = AutoCompleteMode.SuggestAppend
txtbox.AutoCompleteSource = AutoCompleteSource.CustomSource
Dim valoare
For Each valoare In list
txtbox.AutoCompleteCustomSource.Add(valoare)
Next
end Sub
This is one item from arraylist extracted from database in this format :
code4993 ->description of code4993(3 buc X 234 lei)
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Jun 29, 2010
I want to access each entered element in an textbox as an index in ArrayList. But, the problem is that whenever I enter value in the textbox, it stores all the values in single arraylist index.
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Aug 12, 2011
I am trying to loop through my repeater control and get the textbox values.However, I am getting an error: {"Object reference not set to an instance of an object."}
my code is:
Dim txtField As TextBox
Dim j As Integer = 0
'Confirm if user has entered atleast one quantity
For Each item In rptRequestForm.Items
[code]....
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Jul 30, 2009
Private Sub TextBoxHandlers()
For Each c As Control In Me.Controls
If TypeOf c Is TextBox Then
AddHandler c.DataBindings(0).Parse, AddressOf Textbox_Validate
End If
[Code] .....
I think I'm close but how do you get what the text box is bound to? I'm trying to loop through all my textboxes and add a handler that on validation will insert a null if it equals string.empty. How to set the property manager by sending it the appropriate Binding context. I know that this code will not find textboxes in panels or ones that are on other controls, that's fine, for now. I'm also not sure how it will handle controls that are bound to different datasets.
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Dec 1, 2011
What I am doing is iterating through all the groups that belong to the top group (Generic reports). Then I take advantage of the GroupPrincipal.GetMembers(True) which will recurse through a given group name. I test to see if the user exits under that group and if true I put the group name in an arraylist.
I use the for each principal in GroupPrincipal.GetMembers to loop through each returned user to see if they exist.
Is there a way to put all the returned users Principal.Name from a given group in GroupPrincipal.GetMembers into an ArrayList? This would allow me to to use Arraylist1.IndexOf to search for user. Which would be much faster then iterating through a returned list using the for each construct.
Sub RetAllMbrs(strUser As String)
Dim oPC As PrincipalContext = GetPrincipalContext() '<- this is function somewhere else in the code
[Code].....
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May 6, 2010
I have an arraylist (arrFirstArry) which I use to populate another arraylist (arrNoDuplicates) preventing any duplicates from being added. This works fine. What I would also like my code to do is prevent adding any partial values which may exist from being added. i.e. my array is like this
[Code]...
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Sep 22, 2011
I have two structures Public Structure myResearchData
Public batchName As String
Public arraylistRData As ArrayList
End Structure
Public Structure myResearchSubData
Public researchDescription As String
[Code]...
Cleared MyResearchData.arraylistRData for new data to be put in but it also clears the arraylist inside MyResearchDataAList and didn't old the contents of the arraylist
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Sep 21, 2010
What I need to do is read an ArrayList in My.Settings and add another ArrayList to it. The first think I'm trying to do is load My.Settings.Records into myArrayList. I'm not quite sure on the proper way to do this. I've tried things such as Dim myArrayList As ArrayList = My.Settings.Records, I'm not sure if I need New and I'm not sure if I need .Clone or .CopyTo.
Then I have another ArrayList myArrayList2. To get this into myArrayList I've done: [Code] Then to save it back to My.Settings I've done. My.Settings.Records = myArrayList. The problem is I keep on getting Object reference not set to an instance of an object error on the AddRange line. My.Settings.Records is definitely an ArrayList and it will sometimes = Nothing. The objects will only ever be strings.
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Mar 20, 2012
I want to create an array of an array (or arraylist of an arraylist) to hold strings.I want to fill an array1 with string values Then add this array to array2. - but only taking up 1 row in array2 e.g something like array2(index)=array1 Then clear array1 then loop through this again with different data, and add it to the array2.so will end up with something like
array2(0)... contains a collection of array1 data
array2(1)... contains a collection of different array1 data
.. and so on
i think i need to make new instances of array1 each loop, but not sure.I dont mind if it uses arrays, or arraylists, or lists, or structure of arrayslists?
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Apr 12, 2012
s there a difference between the arraylist in visual basic and arraylist in C#? I had to convert some C# code to VB and there is a call I make in a third party api that requires me to pass in an arraylist. When I do this in C# it works just fine, but when I do this in VB, I just get back a vaque exception from the api.
[Code]...
The exception I get is very vague and comes from the API. All i get is, "ARException Occured".
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Sep 29, 2009
can somone just post a code of
1. Writing the last line of .txt into textbox1
2. Adding line from textbox to .txt
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Mar 6, 2010
I am curious on this my program I am building I want to create yahoo emails but im stuck on the last part. How do I get the captcha to display in picturebox? Could I use like a screenshot method or something? My picturebox is named picturebox
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Mar 25, 2009
i wondered if its possibile to have a textbox(multiline) full of letters eg
qwqewrtrfuiuouoiihgfgxfhcgjhvkjgjkvcvvnhj
adfsgfsgtrdsgrdgdrgadstgahfthfjfjfhsdhfhjkkxzc
cvxbxmbcnmhfgjdsfjtjnvvczdnerjEtrurtyururvfjsdf
and nor the number of spaces from a desired letter to the last.In the case above there is E(which i made capital letter).How can i code to know that from that E till the end there are 17 spaces?
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Jun 21, 2010
ok the problem is that when a button is click I want it to add 1 (+1) to a textbox. This process will keep on going on till I tell it not to...How would I just keep a running total of whats happening in the textbox...What I mean to say is that if I pressed the button 10 times, instead of it showing:111111111 I want it to automatically add the numbers up to show 10 instead.
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Nov 16, 2009
I'm trying to make a notepad type program that is specialized for coding HTML. One of the features
I'm putting in it is that when the user presses f1, it in puts <> where the user is currently
typing. However, the way I'm doing it, I can't get it to even insert the text led alone put it where
the user is currently typing.[code...]
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