If Entry.ToLower = "test" Then
Dim test As Double
test = Double.Parse(InputBox("test", "test")[code]....
to check if I can inputoutput scientific numbers tofrom Double.I was able to output the data successfully. (With "E" instead of "* 10 ^" but that's fine)But when I input the same number error occurs.
"System.FormatException: Input string was not in a correct format.
at System.Number.ParseDouble(String value, NumberStyles options, NumberFormatInfo numfmt)
at System.Double.Parse(String s)
at Particle_Simulation.General.ConsoleEntry(String Entry) in G:ProjectsVisual BasicParticle SimulationGeneral.vb:line 23"
The only post I can find on this matter is one that coverts the double to a decimal before converting it into a string. However the numbers I'm using are far larger than what a decimal can store. Example: 1/(16^10)
So how can I convert the solution to the problem above. Which equals 0.00000000000090949470177292824, to a string value that is exactly as it's shown? Cause when I convert this to a decimal I still end up with a string in scientific notation..
I would like to know if Visual Studio does have a setting where you can choose whether it should write nombers like 0.00000127 in scientific notation or not? I am writing such doubles to file but VB2008 writes them in scientific notation. If I treat these numbers as decimals then it writes them correctly, but I also have to take care of performance as I'm writing lots of numbers.
I can not column 4 of my Datagridview1 to display numbers as ###,###,### with not decimal places it seems stuck in Scientific notation mode, even though I have set it several different ways in the menus.How do I set it in the program like I set the column width.
DataGridView1.Columns(2).Width = 80This is in VB ExpressGary
I am working on a project that involes reading an Excel file, picking through it, then creating a flat CSV file. One of the the data elements I am picking up is a 9 character string that may be numeric, or contain one or more alpha chatacters. Excel has a nasty habit of converting long numerics to scientific notaion. I can overcome this by converting the "general" string to "TEXT".
However, there is one instance where I can not get the function to work...the string is "90333E108" ( the CUSIP for USU). Regardless, the text string is saved properly into the CSV file. When opened in a text editor, it reads correctly.
When opened with Excel, it is in scientific notation. Changing the field to "text" from "scientific" still displays "9.03E+112".
how to create an csv file that Excel will open and read correctly?
You can test this by creating an Excel workbook, format all cells as TEXT and add the following data:
I've been just making random programs trying to get the hang of the new language this time I was making a leap frog game where it switches back and forth beetween frogs every time a button is pressed. It also checks if the frog can land in the text box above the button pressed, if there is another frog there a message box will pop up saying sorry space is filled other wise the frog should land there.
[code]...
The error message says "Conversion from string "frog1" to type 'Double' is not valid." I understand what a double is but I've tried And If and that causes a bunch of errors.My Question is whats wrong with this cod and how can I make a double if statement???PS I did try to make an array to shorten this but thats in a different fourm will post URL later
The string itself contains things like "random" & random.next(1,3) & "random2" etc. The string registers all of this as a string and doesn't actually calculate random numbers.Is there any way to fix this?
I make a query in coding. But I got conversion error.My query is below
Dim strSelect As String = "" strSelect = "SELECT " & _ "Description As [Desc], " & _
[code].....
Exception error is like
Conversion from string "iif(CurCons = 0, " to type 'Double' is not valid
Actually, in my report, i wanna show if it's zero then '-'. If i set it in this string.I got another error like below The provider could not determine the Decimal value. For example, the row was just created, the default for the Decimal column was not available, and the consumer had not yet set a new Decimal value.
From da.Fill Dim cmd As New OleDbCommand(strDynamic, m_DBConn) Dim da As New OleDbDataAdapter(cmd) da.Fill(ds, "tblCur")
I'm trying to build a scientific calculator with vb .net, except it is vista glass :-p
I basically want the user to be able to enter an equation like SQRT(5 * 6) / (2 ^ 4) and then I want vb to use system.math to solve it. If I write this in my code, vb is able to do it, so how could I do this at runtime.
i am converting a string to double?i would like to know in advanced whether it would case an error to convert a string to a double. for example if i try to convert "hello" to a double, it would give me an error. is there a way for me to know ahead of time whether converting something will cause an error?
I want to convert the string value "13.3939" into a Double yet when I tried Convert.ToDouble("13.3939"), Double.Parse("13.3939") and CDbl("13.3939") they all returned 133939.0. Does anyone know how to do this properly?
Is there an efficient method in VB to check if a string can be converted to a double?I'm currently doing this by trying to convert the string to a double and then seeing if it throws an exception. But this seems to be slowing down my application.
I was trying to convert from Double to String and everything working fine. But when I tried some bigger number with fractions in it. I got the number but rounded. I tried something like that:
Dim dd As Double = 1235212435.3453636 Dim str As String = dd MsgBox(str) But what I got is 1235212435.34536 instead of 1235212435.3453636
As I compare the DSO with the DSO para, it seems doesn't compare both data at all. I have been converting the DSO as double first between comparing it as if i compare with string it doesn't work.
Dim dso1 As Label = CType(e.Item.FindControl("dso1"), Label) If Not IsNothing(dso1) Then dso1.Text = e.Item.DataItem("DSO").ToString
Public Class frmWaiter Private Sub btnCalculate_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCalculate.Click 'Bill Amount Input Box Dim txtBillAmount As String
However, the directories parameters contain spaces so they have to have quotes around them. I tried with single quote ' that works fine to put in the string, but the command shell executing the command ignores these. So it has to be double quote "
I have tried all methods I have fount on the Internet, for example to have a backslash before the double quote and to have three double quotes, but nothing seems to work. I get a compiler error as below.
I created an application in vb.net 2005.It works fine on my machine. I tested several different test machines and all were working fine. As for the client, it's generating an error. My application reads from an excel sheet and imports the values to an oracle database. the error being generated is: "conversion from type string to type double is not valid". Why is it generating on on the client's computer and not mine?
I am developing a asp.net web application, i have a string (with a value in it from a database), with multiple lines that i put in a TextBox with mulitline type. (textarea)
Now the problem is, that in the string are multiple lines, with much empty space. so i want the remove only the double linebreaks.
