Creating An Array From List Box?
Oct 25, 2011
I'm trying to create a small program where someone would select one of five items from a list box (Hot, Medium, Mild, Sweet, Zesty). When they select this, they then enter in a qtyTextBox the quantity they want, ie.e, 1, 2, 3, 5,... Then they the Calculate Button, which then the total would go into the preDiscountLabel box, where it would calculate the amount they want * the sale price. Here is the Price Listing:
Hot - 3.19
Medium - 3.09
Mild - 2.98
[Code].....
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Nov 7, 2010
I have an array of 26 strings from A to Z. Then, I am creating a random list of 7 alphabets from this array. Now I want the user to pick first 2 alphabets manually and then on a click it will display the rest 5 randomly generated after subtracting first 2 picked ones from the whole 26 alphabets array. how this can be achieved in lists.
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Aug 24, 2010
I'm having trouble creating a global array that i can use in other functions.
I have this code right under "Public Class myClass":
Dim LoadedPlugins As Array
Then in a function I have this:
Dim PluginList As String() = Directory.GetFiles(appDir, "*.dll")
For Each Plugin As String In PluginList
Dim Asm As Assembly
[Code]....
Now obviously that doesn't work, how can I add the tmpPlugin to an array or list so I can use it in other functions?
The main thing I need to be able to do is loop through all the loaded plugins and execute the CustomFunction in a separate function than the one that loads the plugins listed above.
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May 7, 2010
Recently I have learned visual basic 2008 express edition and developed programs for data crunching and analysis. The VB 2008 express edition has microsoft visual studio 2008 v. 9.0.30729.1 SP and .NET Framework version 3.5 SP1. Now I want to create x-Y (date-Y value) graphs using the crunched data stored in an array list simulating a data base access. I download and installed the "Microsoft Chart Control for .NET Framework " and try to learn to use it within the VB 2008 express edition using the tutorial. It seems that the chart control did not get installed?
1. Do I need at VB 2008 professional to allow using the chart control?
2. Why after installing chart control, there is no change on the items under the NET components within the Toolbox>ChooseItem>.
3. How do I get to use the chart control under VB 2008 express edition.
4. Any code available to generate versatile graphics without using the chart control? Because the chart control has tons of classes already it seems the best is to just use the existing and downloadable chart control?
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May 27, 2012
I have a program that will compare an array of grocery list items glist and an array of coupon item clist.When I compare the two and if there is a match somewhere in the array I want to have a picturebox visible.When there is no match, I want the picture box not to be visible. [code] The code seems to work great until I come to the else statement.When the code finds a match it displays the picture box and the msgbox without error, but as soon as the message box is cleared, even though i've input it as an ELSE statement, the picturebox goes false again.Does anyone have any idea of how I can "hold" the picturebox to stay visible while the match between the arrays exists?
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Dec 30, 2009
please tell me what is below code doing? is it creating array with two values or its creating to string index which will take value later? [code]
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Mar 20, 2011
I have a Comma Separated value file in .txt format... simply put, its a bunch of data delimited by commas and text qualifier is separated with ""For example:
"So and so","1234","Blah Blah", "Foo","Bar","","","",""
"foofoo","barbar","etc.."
Where ever there is a carriage return it signifies a new row and every comma separates a new column from another.My next step is to go into VB.net and create an array using these values and having the commas serve as the delimeter and somehow making the array into a table where the text files' format matches the array After that array has been created, I need to select only certain parts of that array and store the value into a variable for later use.... how to make the array and selecting the certain info out of it..
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May 3, 2012
i have issue returning a list in a web method. here is the code
<WebMethod()> _
Public Function getTags(para_parents As String) As List(Of getTypeDetailsByParentName_Result)()
Dim context As New PPEntities
[code]....
the error is
Value of type 'System.Collections.Generic.List(Of SaftyonRoad.getTypeDetailsByParentName_Result)' cannot be converted to '1-dimensional array of System.Collections.Generic.List(Of SaftyonRoad.getTypeDetailsByParentName_Result)'
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Jun 20, 2011
I am trying to get a count of all the times a byte sequences occurs in another byte sequences. It cannot however re-use a bytes if it already counted them. For example given the string let's assume the byte sequence was k.k it would then find only 3 occurrences rather than 5 because they would be broke down like: [k.k].[k.k].[k.k]. and not like [k.[k].[k].[k].[k].k] where they over lap and essentially just shift 2 to the right.
Ideally the idea is to get an idea how a compression dictionary or run time encoding might look. so the goal would be to get down to just 2 parts, as (k.k.k.) is the biggest and best symbol you can have.
Here is source so far:
[Code]...
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Jun 9, 2011
I developing a roster application (asp.net with VB + sql server) to let user input shift duty record, proposed screen as follows:for the database design, each staff will have one record per day.[code]I want to create a multi dimensional array to bind the gridview.Is that correct that I create a arraylist (for 7 days) and then a subarray for each day? How can I create a 7 dimensional array & sub array under this 7-D array in asp.net + VB ?
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May 20, 2009
I have a class called Car. Car has a bunch of properties i.e. Car.Color. CarService has a method called GetCars(). Within GetCar, I have a loop that appends a List of, you guessed it.. Cars.[code].....
I get: Value of type '1-dimensional array of Namespace.Car' cannot be converted to 'System.Collections.Generic.List(Of Namespace.Car)'. What would be the best way to convert this 1-dimensional array' back into a List of Cars?
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Dec 15, 2009
I have a variable declared as...
Dim MyList as List(Of String)
I would like to create an array of these lists of string.
Something like....
[code].....
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Jul 20, 2011
I want to create a big list box that has lots of default values in many lines so they can then be edited later.Right now I have in my initializer:
Dim counter As Integer = 0
For counter = 0 To counter = totalNumber
listBoxThingy.Items(counter) = ("DEFAULT DETAILS TO BE COMPLETED")
Next
with my list box called listBoxThingy and totalNumber a previously defined constant of how many items I want in my list box.yet when I try to run the code I always just end up with the first list value containing the text.Even if I put a counter=counter+1 it still only gives me the one completed value of my list box?
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Nov 18, 2011
I would like to know how I can get the list of possible choices to Intellisense for my class object, like it does with MsgBox.For example, when creating a message box you type MsgBox "Test Message Text", vbYesNo, "Test Message Title".In typing that, when you type the comma just before the vbYesNo, it gives you the possible selections for button types in a drop down list: i.e., vbYesNo, vbOKOnly, etc.I have a class called clsKeyState. what it does is turn on/off/toggle key states, such as CAPS LOCK, SCROLL LOCK, NUM LOCK, etc... I have set my property for it as Get/Let "State". When I call it to set a key to on/off I will be doing it like this: KeyState.State WhichKey, On/Off/Toggle.I would like the WhichKey part to automatically display all the possible selections that I define, such as CapsLock, NumLock, Scroll Lock; and I want the On/Off/Toggle to display those specific items also (On, Off, Toggle). I will be using the ability to create these displayable options for many more things in my project than just this one simple class.
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Jun 5, 2011
So I have a program that is supposed to support a small business. I have the work completed and the professor said it was correct but I wanted to go do a little extra. Basically, on the Order screen, you begin to type the name of a customer/supplier/employee into a text box and a list of names that fit the criteria pops up in a list box (lbMatchingAccounts). When you select it, you can hit enter new order and be transported to the Order Details screen to enter the new order.
[Code]...
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Apr 24, 2010
I want to create a sorted list, where I enter a name in two separate text boxes(Jones, Brown) and their values in two other textboxes(200,500), then in a fifth text box I enter one of the names and it gives me a messagebox with its corresponding value. Here is my code below.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim saleslist As New SortedList(Of String, Decimal)
[code]....
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Jan 15, 2012
How can I create an array of a class that I have declared? I have this class named partswith properties of frame, engine and date, and i want to know how could I store them in an array .
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May 19, 2009
I need to be able to refer to a set of controls on a Windows form using an array, but I'm having a few difficulties.
The Windows form (WForm.vb) contains two textboxes (TextBox1 and TextBox2).
In Module1.vb I have created an array reference to the textboxes thus:
Public wf As New WForm
Public ReadOnly TB() As Control = {wf.TextBox1, wf.TextBox2}
Then, in WForm.vb I have tried to refer to the textboxes via the array:
eg.
TB(0).Text = "Change text to this"
I know that the array is referring to the textboxes, because when I hover the cursor over the line 'TB(0).Text = "Change text to this" ' in debug mode, I get the following:
(0)|{Text = "Change text to this"}
(1)|{Text = ""}
but for some reason, the text in TextBox1 on the form isn't actually being changed!
(There is obviously no problem with change the textbox's text at this point in the code, because I've tried substituting the array reference 'TB(0)' with a direct reference to the textbox 'TextBox1', and the problem disappears.
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Jun 4, 2010
I need to create an Array of Labels. I am using A With Code block to set the properties of the Labels as well as the Data Binding. I want to set the LabelIndex inside this block as well. How do I go aboute this?
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Mar 22, 2010
i want to declare an array with a name that is the value of a variable. I need to do this because i want to create arrays from a text file that i'm reading.Basically, if someone could make this work then i should be able to change it to fit my use.
Dim var1 As String = howdy
Dim var1() as Integer
In this case i'd like to be declaring an array with the name 'howdy' that stores integers. In reality i'm looping a bunch of read names and would like to create an array for each name i read- but i'm quite capable of sorting the rest.
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May 26, 2010
I want to create a generic list - but I want to specify the type at runtime - is there a way I can do this? using reflection perhaps?Something like this...
Public Shared Sub create(ByVal t As Type)
Dim myList As New Generic.List(Of t)
End Sub
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Jun 23, 2009
I'd like to create a list of an anonymous type, for example:
Dim dsResource = New With {.Name = dsResourcesEnd(index).Last_Name & ", " & dsResourcesEnd(index).First_Name _
, .StartDate = dsResourcesStart(index).Day _
, .EndDate = dsResourcesEnd(index).Day}
I have created that anonymous type. Now I'd like to add it to a list of that type. How do I declare a list of that type?
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Nov 2, 2009
I am using MS Visual Studio 2005 and SQL Server 2000 to develop an application. I wish to make a list of radio buttons when I fetch a particular column from a table. for example, I fire a query that returns to me 10 types of candies, (yummy!). I want to show these candies as options on the form. I want to use Radio Buttons. Now the number of candies are not fixed, it can be any number (less than 15-20). So I wish to dynamically create this 'Array of Radio Buttons' on the form.
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Sep 7, 2009
Im working with VB 2008 express
I have several pictures on my form designer and a large textbox to the right of them. When the user clicks the pictures I want a list to be created in the textbox. I was able to get a single button posted into the textbox but when a second picture is clicked it over rides it and replaces it. I wasn't sure if i should be use some kind of loop or not.
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Aug 4, 2010
I am creating a List(Of String), always of size 9.This list contains True/False values. I need to go through this list and find the 3 values that are True (will never be more than 3, but could be less) and then set 3 string values in my code to the 3 index's of those values + 1.
Here is my current code:
Private Sub SetDenialReasons(ByVal LoanData As DataRow)
Dim reasons As New List(Of String)
With reasons
[code]...
I had 3 True's next to each other in the array and the code failed with an exception saying count must be positive or something.Now if there are less than 3 True's, it should set the remaining DenialReason's that haven't been set yet as blank (however they are set as blank in the constructor already to account for this).
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Jul 25, 2011
I'm having a problem at the moment developing my application. What i need to do is find out how many modems they are connected to my system and send data to each one in turn. I have the programme working for one modem at the moment.
So I can send data to a modem that i specify, for example a modem on COM port 1. I have functions already that will give me a list of COM ports that I need to open.My problem is that i want to dynamically create a new modem object along side existing modems and store them in a collection.
[Code]...
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Aug 18, 2011
I'm a PHP guy and in PHP I would do something like the following:$variable = array('0001'=>'value1', '0010'=>'value2');
I'm pretty new to VB.net so I'm wondering how to translate the above code to VB.net
I think I have to use a dictionary:
Dim variable As New Dictionary(Of String, String)
variable.Add("0001", "value1")
variable.Add("0010", "value2")
Is this the correct way of doing it or should I use something else for this?
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Jan 12, 2010
I have a group of boxes witch will all hold data input by the user. I am using an arraylist to store these, or atleast I am hoping to. So, the problem I have is getting the data to actually save to the arraylist. It keeps giving the error saying that type string cannot be converted to array list.
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Sep 20, 2009
[URL]..And put into a dynamic array where each month represents a record in the array with 3 given with C/P, Strike and Settle
The criterion is for every month grab all C/P that have matching strikes thus returning the following for every month. See data below and what I would like to return below. Want to use excel VBA to return the values from array into a sheet in excel. See data below
[Code]...
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Nov 18, 2008
i am attempting to create and then update data in Labels using VB2005.I create the label when the form is loaded using this for loop
For j As Integer = 1 To count
Dim name As String
Dim m As String
ReDim L(count)
[code]....
This creates the labels and text boxes in the form. Later in the program I would like to change the text within both the T1310() and T1550() text boxes and I am attempting to do so with the following code.
For j = 1 To count
status = OP930_SelectModule(j - 1)
status = OP930_SetWavelength(1310)
[code]....
I get errors on the Blue lines. Everything compiles fine, but when the software goes through the loop I get the error "NullReferenceException was unhandled"
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