I am trying to convert a string to double and it is giving error. Bye the way it is not giving error on my PC but it gives on some pc's where other clients are using. String is retrieved from xml data.
<data><vitals>
<username>aiglemedia</username>
<balance>49.60</balance>
</vitals></data>
vb code
Dim curBalance As Double
xmlNode = xmlDoc.GetElementsByTagName("vitals")......xmlDoc contains the above xml data
curBalance = System.Convert.ToDouble(xmlNode.Item(0).Item("balance").InnerText)... I think so error is on this line.
Below is the link for the error given by the client who is using the app [URL]
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.
Iam using VB 2005 on Vista This is a sample of what I am doing:
Public Class Form 1 Dim WC As String Private Sub Button1_Click
[Code]...
How do I get around this? What I am trying to do is, I really want to use TextBox's for input to enter numbers when the program is running and I also want a MsgBox to appear if an input is not entered because these numbers are important to a final formula further down.
data table contain column named as Fld_primary. this column contain value like 0.00 it is double datatype in mysql table.i want store that datatable value in double variable. am always getting error when i convert to double datatype.
my code ------- Dim ds5 As dataset1.DTSUMDataTable = TA5.GetData(users) Dim dttot As Double dttot = CType(ds5("fld_primary").ToString, Double)
Error:Conversion from string "fld_primary" to type 'Integer' is not valid.
I am using two textBox's. The first to enter the data. The second to convert to answer the program complies with no error, the debugger cannot convert data type from string to double.
[Code]....
why does the program not convert the textbox txtFahrenheit from string to double?
I can convert a string with no sign or with negative sign ("-" minus sign) into a double, but I cannot convert a string with positive sybmol/sign ("+" plus sign) into double. Considering the following samples:
Convert to string that has negative sign to double Dim realnumber As Double Sample 1. realnumber = Double.Parse("1.2345E05", NumberStyles.Any)
For a labels text I need to use the & symbol in the text, so I did this:
Const symbol As Char = Chr(38) and I am using like this:
Me.Label1.Text = "Welcome to A " & symbol & " R Storage Management Systems" I am looking for this because it is how the business name is spelled: A & R Storage
any other Char symbol I use in place of 38 will display the Char, but not the ampersand, it leaves a blank spot. Any advice. And yes I know the & is used to concatenate string variables, but I should be able to use it as a Char.
First the CINT etc commands will not work for this.I have the following value 2A000000412DF21B in string displayed here as hex. It should convert to 3026418950686503451 but instead I'm gettting 3026418950686503424.I take the string and convert it to bits 0010101000000000000001000001001011011111001000011011 then using a simple function I loop through and calculate the value. how to convert what I have in string to the number above.
Dim dbA As Double, dbB As Double, intX As Integer Try dbA = 1 : dbB = 0 For intX = Len(strB) To 1 Step -1
I have a column of data in my text file datafile coming over as a string value 06/05/2011 12:00:00 AM opened in notepad all my fields are in quotes. "06/05/2011 12:00:00 AM"If I open the file in excel it displays 06/05/2011 0:00 If i then save that file back into excel it removes the quotes 06/05/2011 0:00 If I open the excel saved version my schema file will read the date as a date But If I open the version that has the quotes "06/05/2011 12:00:00 AM" and manipulate the string to "06/05/2011 0:00" and try to parse the column I get error string not recognized as valid date time
HTML
For i As Integer = 0 To dtsold.Rows.Count - 1 Dim DateSold As Date DateSold = New Date DateSold = Date.Parse(CStr(dtsold.Rows(i).Item("DateSold")))
Let's say I want to convert a Double x to a Decimal y. There's a lot of ways to do that:
1. var y = Convert.ToDecimal(x); // Dim y = Convert.ToDecimal(x) 2. var y = new Decimal(x); // Dim y = new Decimal(x) 3. var y = (decimal)x; // Dim y = CType(x, Decimal) 4. -- no C# equivalent -- // Dim y = CDec(x)
Functionally, all of the above do the same thing (as far as I can tell). Other than personal taste and style, is there a particular reason to choose one option over the other?
EDIT: This is the IL generated by compiling the three C# options in a Release configuration:
1. call valuetype [mscorlib]System.Decimal [mscorlib]System.Convert::ToDecimal(float64) --> which calls System.Decimal::op_Explicit(float64)
Follow-Up available: There's a follow-up with further details, see Convert MBF to IEEE.
I've got some legacy data which is still in use, reading the binary files is not the problem, the number format is. All floating point numbers are saved in MBF format (Single and Double). I've found a topic about that on the MSDN boards but that one only deals with Single values. I'd also would like to stay away from API-Calls as far as I can.
Edit: Just in case somebody needs it, here is the VB.NET Code (it's Option Strict compliant) I ended up with (feel free to convert it to C# and edit it in):
''' <summary>Converts a MBF Single to an IEEE Single</summary> ''' <param name="src">The MBF Single value</param> ''' <returns>The converted IEEE Single value</returns>
Let just say I have an Integer like 10,000 (that's the VALUE in want to reach). So, I have another integer like 2500 (that's my current VALUE). Third I have another Integer about 350 PER HOUR. To reach 10,000 I need 7,500 (well I already have 2,500). How long must I wait to reach the 10,000 when the increase is about 350 a Hour. Okay, that's easy: 7,500 / 350 = 21,428571 Hours. BUT how can I convert this double to a timespan? Or how is it possible to add this double value to the current Date to get the Date + Time when I reach the Value?
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
Dim Latitude As Double = row("fltLatitude") Dim Longitude As Double = row("fltLongitude")
Most of the lat/longs that are being fetched from the db using SP are retrieved in properly, except for a couple of records which do not include a period to indicate a lat/long value.I have tried using these:
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")
