Put Only Numeric Values In A Listbox

Oct 16, 2011

I need to put numeric values (only numeric, I should control that all numbers inserted are DOUBLE) and put in a listbox by the following criteria:

1-At the top
2-At the final
3-BY NUMERICAL ORDER (I tried to put it in Sorted=True but puts that 122 is lower than 22...)

How could I solve it? And how could I control that?

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I need to round a single variable up to the nearest integer no matter what the decimal points are, weather it be 74.1 or 74.4 I always need it to round up to 75.ere is a sample of the code i am using

'Varibles
Dim sngLength As Single
Dim sngWidth As Single

[code]....

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I am using Visual Basic Express 2008.I have added the following code to my text box:

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If Not IsNumeric(e.KeyChar) Then

[code]....

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I�m using VB.Net 2008 application program.I�m using DataGridView, where column types DataGridViewTextBoxColumn. I have 3 fields. 1 field values are numeric, 1 field values are string and 1 field values are decimal.

When I try to sort the string value column, it sorts correctly. But when i try to sort the numeric value column, it sorts as if its string value.

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I tried
(From c in Table
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[code]......

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The code below allows me to enter an integer in to the text boxes, but if I enter a decimal in any it throws an error. How do I validate decimal values in addition to integers?

Private Function numeric() As Boolean
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[Code]....

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Sep 25, 2009

I am trying to read data with a test routine from a fairly simple 3rd party Excel file. The file has three sheets and was created by Open Office 3.x as an 'Excel 97/2000/XP .xls' file. The later, still to be programmed, application must later run on machines with Windows XP Professional using the 2.0 .net framework and no Office package installed. The content of the file does not need to be modified by the later application. For some reason, numeric values are not read correctly. They "convert" to DBNull. I've searched around a bit but not found a 'simple' solution for solving this problem. Adding 'IMEX=1' or 'HDR=Yes;IMEX=1' to the connection string results in an error 'Installierbares ISAM nicht gefunden' (installable ISAM not found).

Based on various examples I've found, I've written the following test code:
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Option Explicit On
Imports System.Data
Imports System.Data.OleDb
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[Code] .....

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Jan 19, 2012

I am updating an application I've written used by my employer, a University, to allow students to register for their desired residence hall. I'm working on a new feature that will allow students to "partner" with another student - so that when one or the other registers for a room, the other student will be registered as well.

[Code]...

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Sep 26, 2009

Dim number = TextBox1.Text
If number < 1 Or number > 100 Then
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Exit Sub
End If
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I have found a couple of possible methods, although the sites which I found them where very unclear on how they actually work. I feel strongly that I should know how all of my own programs work >_>

I have no actually got this to work with my program yet. Are there better methods than this?

Private Sub TextBox1_KeyPress(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress
Dim allowedChars As String = "0123456789$,"

[Code].....

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Jan 27, 2012

I am using VB.Net 2008 application program. I am using DataGridView, where column types DataGridView TextBoxColumn. I have 3 fields. 1 field values are numeric, 1 field values are string and 1 field values are decimal. When I try to sort the string value column, it sorts correctly. But when i try to sort the numeric value column, it sorts as if its string value.

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Jul 13, 2011

i got no clue how to edit ListBox items with an NumericUpDown Tool I need to change the selected item in the listbox example->

"7226218; Hemlock; 22.55; 0"
Into -> "7226218; Hemlock; 22.55; *numeric box value*"

After the Add to orderlist button is clicked. It has to replace the old ListBox item and it needs to be saved on a TextBox (the order editor) on form2.

- And order of 0 items may not be accepted

- When nothing is selected, and user presses the "Add to orderlist" button, the program must not be exited with a crash.

- The order (orders.txt) must not be made at start-up, but when the first order is placed.

- When a order has been made, the only way to correct the number is to edit the order.

- When an order is placed, it must directly be put in orders.txt.

- The order must exist after the program has quit.

- You cant order the same thing two times.

- When u type a number by hand, the button to order must be usable.

- The can only change the order amount in the edit program.

My uncompleted code:

Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
ListBox1.Items.Add("7226218; Hemlock; 22.55; 0")

[code]....

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Apr 2, 2010

[Code]...

How do i sort the listbox in numeric order , I wanted them to be sorted like the way i did below :

[Code]...

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I am not being able to retrieve from my access database in vb. Here is my code that points to the problem:

[Code]...

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The problem here though is that the select returns null. I tried to replace the placeholder ? with a known value like "2011" and it returned a value. This means to me that my comparison crop_year=Convert.ToInt32(cyrNote.SelectedItem.Trim) is negative yet I expect something positive. I've tried to google on how to convert to integer and that is the best I could get.

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Sep 14, 2009

I have a string I want to parse. I could write the code to do so, but I figured that VS.NET has a parser that should do this for me.however, I can't find it. All the searches I do return info on how to parse numeric values in string form into real numbers. It would be nice if the MSDN search had some ways to allow users to enter more details than just search text and 3 ways to filter out irrelevant stuff. In any case, I also tried things like string.parse (nope - although I kinda figured this would be it.) I also looked at Enum.parse, but the code indicates that it works with arrasy of items, not strings.

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Feb 21, 2012

I have a problem with the auto-complete behaviour of comboboxes in VB.NET (with the .NET framework 2.0).I am using a combobox to type in numeric values, and its DropDown list to suggest possible numeric values. This list is sorted in ascending order, for example {"10","92", "9000", "9001"}.The combobox properties are set as follow:

AutoCompleteMode: SuggestAppend
AutoCompleteSource: ListItems
DropDownStyle: DropDown
Sorted: False

The DropDown list is simply filled like this:

myCombobox.Items.Add("10")
myCombobox.Items.Add("92")
myCombobox.Items.Add("9000")
myCombobox.Items.Add("9001")

When I don't type anything, the order of values of the DropDown list is correct, in original/ascending order. However, when I start typing something, the suggested values in the DropDown list get sorted (alphanumerically): if I type "9", the list of suggestions becomes {"9000", "9001", "92"}.I would like to prevent this behaviour to get the values of the list in the original/ascending order. I can't figure out how...A possible work-around would be to pad with zeroes the values in the list, e.g. {"0010", "0092", "9000", "9001"} but I would like to avoid this.

[code]...

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for each item in listbox1.selecteditems listbox2.items.add(item) next

i get system.data.datarowview in the listbox2 how could i replace that with the actual value ?

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lstSigners.Items.Add(strSigner + strSigner)

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