Checking If A String Is A Double?

Jun 17, 2009

If Double.Parse(list_numbers.Item(i), possibledouble)

list_numbers is a list of strings

list_numbers.Item(i) = "0.000"

possibledouble is a double

debugger returns "input string was not in a correct format"

i thought that the double parse would convert the string into a double format of "0.0" but it gives me an error.

View 3 Replies


ADVERTISEMENT

Checking For Double (same) Values SQL Database

Mar 4, 2009

I have a form where when the user clicks the button the values of the form are stored in SQL database. I want to write code in order to check if a specific textbox-value already exist in the database table (in the field "Name"). I 've tried writing something but it doesn't work properly.

View 2 Replies

Double If Statement - Getting Error "Conversion From String "frog1" To Type 'Double' Is Not Valid."?

Apr 12, 2011

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

View 3 Replies

Checking If Label = String Or String?

Mar 22, 2010

i have a list view that contains files i use a for statement to go with them to and check what format the file is then sets its image but i dunno how to get it to work i cant use the or statement it says it cant convert to boolean

vb
If Label1.Text = "doc" Or "docx" Then
oresults.ImageIndex = 14
ElseIf Label1.Text = "ppt" Or "pptx" Then
oresults.ImageIndex = 10
End If

View 1 Replies

VS 2008 - Checking For STRING Or STRING

May 14, 2010

I am currently using the following code to parse a webpage.

CODE:

Where it has:

CODE:

It would work, as with this:

CODE:

But i need it all in one line of code..

View 2 Replies

Checking A String Contains A Value?

Jul 7, 2010

I am trying to figure out how to check a string can contain a certain value.In the begining I had a checkbox and wanted to hide a ceratin field depending upon which checkboxes were selected.The problem with this is that the value is always = to the first value.

I got around this by writing these values into a hidden textBox and using a loop.So now I have a textbox and if the user selected the 1st and 3rd choice the textBox would = "AC" If they selected all choices it would = ABCD etc...How can I determine if the values in my textBox contains just letter 'B' ?

I tried this:

--------------------------
Dim values As String = [String].Empty
For Each item As ListItem In section2List.Items
If item.Selected Then

[code]....

but this doesn't work.

View 7 Replies

.net - String Query Error Conversion From String "iif(CurCons = 0, " To Type 'Double' Is Not Valid

Jul 4, 2011

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")

View 2 Replies

VS 2008 Checking How Many '.' There Are In A String

Dec 21, 2011

i have a textbox in a calculator and i want an if function so that it checks that there cannot be 2 .'s in it:[code]

View 2 Replies

Checking A String Contains Only Letters A - Z / Space?

May 9, 2009

So I basically want to make sure that a string entered by the user is valid. Valid being over 10 characters, containing only upper case characters, and only characters A - Z and spaces. The first two were easy, but I'm having trouble with the third, though.What I originally attempted to do was create a loop which checks if the first invalid character is present with the InStr function, by using the characters ASCII value. The next ASCII value is then checked, and so on until it has checked the string for every single invalid character. If an invalid character gets picked up, 1 is added to a variable, and after the loop is finished executing, if the variable is no longer 0, invalid characters have been detected.

View 3 Replies

Checking An Object's Class By String?

Apr 15, 2011

how find an object's type when it is a subclass of another object and I only know the string value of the object's type's name.

I created the follwing classes:

Public Class word
End Class
Public Class noun

[Code]...

Using 'TypeOf', I correctly see that pn is a properNoun, a noun and a word. The problem is, using 'GetType' to check pn against a string value, I can only see that pn is a properNoun, not that its parent classes are noun and word.

Is there a way to check pn against the string value "noun" or "word" and get back a positive result, indicating that pn is indeed a noun and a word as well as a properNoun?

View 2 Replies

Checking If String Is Numeric Is Not Working In Vb?

Apr 17, 2012

I am trying to check if a string is numeric but in vain. here is my code:

If Val(fnumField.Text.Trim) > 0 Or fnumField.Text.Trim = "0" Or Val(phnField.Text.Trim) > 0 Or phnField.Text.Trim = "0" Or Val(ophnField.Text.Trim) > 0 Or _
ophnField.Text.Trim = "0" Or Val(treeField.Text.Trim) > 0 Or treeField.Text.Trim = "0" Then

[code].....

View 1 Replies

Checking Objects Type By String

Apr 15, 2011

How find an object's type when it is a subclass of another object and I only know the string value of the object's type's name. I created the following classes:
HTML
Public Class word
End Class
Public Class noun
Inherits word
[Code] .....

Then, in my code I create a new properNoun and check to see if it is a properNoun, noun or word:
HTML
Private Sub checkTypes()
Dim pn As New properNoun
MsgBox("Is a properNoun: :" & TypeOf pn Is properNoun) 'TRUE
MsgBox("Is a noun: :" & TypeOf pn Is noun) 'TRUE
[Code] .....

I correctly see that pn is a properNoun, a noun and a word. The problem is, using 'GetType' to check pn against a string value, I can only see that pn is a properNoun, not that its parent classes are noun and word. Is there a way to check pn against the string value "noun" or "word" and get back a positive result, indicating that pn is indeed a noun and a word as well as a properNoun?

View 1 Replies

Checking String If 7 In Length And Contain Any Other Characters

Dec 3, 2011

I am working on a program that will take in a string of length 7 containing either R,G or B for the colours. The program will then check that the string if 7 in length and if it contains any other characters than R, G or B then it will be invalid. I created this code but when I enter the right string length and characters it always gives me the error for not having the right string length.

Private Sub get_cars()
Dim Letter As String
Dim valid As Boolean
Dim position As Integer
txtPosition.Text = position
[Code] ......

View 2 Replies

.net - Converting A String To Double

Jun 17, 2009

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?

View 2 Replies

Conversion From GPS-string To Double?

Oct 20, 2011

I'm reading Lat + Lng coordinates form my database. I need to convert them to double. This is what happens:

Dim strLat As Double = CDbl(reader.Item("lat").ToString) MsgBox(strLat.ToString) ' << result: 5237861 should be: 52.37861. The point is removed.

View 10 Replies

Conversion Of A String To Double?

Jul 30, 2011

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?

View 1 Replies

Convert String To Double - VB?

Jul 23, 2009

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.

Try
' if number then format it.
current = CDbl(x)

[code].....

View 3 Replies

Converting Double To String?

Mar 25, 2010

The message does not appear if a number is not entered - why?

Dim
IAL As Double
Dim inputIAL As Double

[Code].....

View 2 Replies

Converting From Double To String?

Nov 2, 2010

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

View 2 Replies

Data From String To Double?

Nov 15, 2011

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

[Code].....

View 3 Replies

Format Double To String

Jan 28, 2011

I would like to format double number like below;[code]Is this possible?

View 1 Replies

How To Convert String To Double

Aug 30, 2010

I want to convert string to double.

[Code]...

num should be 1.5432 but i get 15432 How can i get as it is in the string?

View 16 Replies

IDE :: Converting To Double From String In VB?

Nov 1, 2009

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

[code]....

View 2 Replies

Put A Double Quote Into A String?

Mar 17, 2011

I have a problem that seems trivial. In an argument to an activity I need to supply a path.

This is done by this code:

String.Format("a
-bd -y -tzip {0} {1}* -r",
Path.Combine(BinariesDirectory,
"output.zip"),
BinariesDirectory)

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.

Error 4 Compiler error(s) encountered processing expression "String.Format("a -bd -y -tzip "{0}" '{1}*' -r", Path.Combine(BinariesDirectory, "output.zip"), BinariesDirectory)".Comma, ')', or a valid expression continuation expected.

View 9 Replies

String To Double Error

Aug 13, 2009

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?

View 6 Replies

Checking An Object's Parent Types By String?

Apr 15, 2011

I'm trying to figure out how find an object's type when it is a subclass of another object and I only know the string value of the object's type's name.I created the follwing classes:

HTML

Public Class word
End Class
Public Class noun[code]....

The problem is, using 'GetType' to check pn against a string value, I can only see that pn is a properNoun, not that its parent classes are noun and word.Is there a way to check pn against the string value "noun" or "word" and get back a positive result, indicating that pn is indeed a noun and a word as well as a properNoun?

View 2 Replies

Checking If String Is A Date In YyyyMMdd Format?

Aug 10, 2011

Not so long ago, I saw somewhere a solution how to check if string is date in yyyyMMdd format (i.e. if it can be converted to date if written in such format). I can't find it anymore but I think is had something to do with DateTime.TryParse method but I can't get it to work. I can get it to work if string is in dd/MM/yyyy format, but dont' know how to make it with yyyyMMdd format. If I'm not mistaken neither of DateTime.TryParse method parameters is for assigning date format...

View 5 Replies

Checking String List Items And Add To ListBox

Jul 6, 2011

I want my program to check the pagerank of all string list items, and than add it do a listbox. Now this is my code to open a list and add it to a string list ( itemlist as list(of string)

Dim stream_reader As New IO.StreamReader(OpenFileDialog1.FileName)
Dim line As String
line = stream_reader.ReadLine()
Do While Not (line Is Nothing)
line = line.Trim()
[Code] .....

I'm using the DLL from this website: [URL]. The problem is that it only checks the first website and the other websites will be 0/10 automatically while they might be 3/10 or something else.

View 1 Replies

Asp.net - Remove Double Linebreaks In String?

Jan 21, 2011

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.

[Code]...

View 4 Replies

C# - Strip Double Quotes From A String In .NET

Jul 24, 2009

I'm trying to match on some inconsistently formatted HTML and need to strip out some double quotes.

Current:

<input type="hidden">

The Goal:

<input type=hidden>

This is wrong because I'm not escaping it properly:

s = s.Replace(""","");

This is wrong because there is not blank character character (to my knowledge):

s = s.Replace('"', '');

What is syntax / escape character combination for replacing double quotes with an empty string?

View 8 Replies







Copyrights 2005-15 www.BigResource.com, All rights reserved