VB To .net Conversion Buffer String?

Sep 3, 2011

I've looked and looked + tryed debugging but I'm not getting anywhere fast I'm trying to import a usb radio driver and I'm 99% there. I can turn it on / off and get / set the freq.. but I'm struggling to get the rds name from it. The VB code for the function is

[Code]...

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Conversion Error On Line 5 Stating 'Conversion From String 'S' To Type 'Double' Is Not Valid

Apr 8, 2009

a user will enter a number, n, which ranges from 1 to 30. they will also enter a "P" or an "S" (sum or product). depending on which was selected, it will calculate the sum or product of the numbers from 1 to n.i'm having a conversion error on line 5 stating "Conversion from string "S" to type 'Double' is not valid." [code]

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Search A String Buffer With Nulls (chr(0))?

Sep 25, 2009

I need to search a buffer for a string of characters.The buffer is essentially a binary file (it's an image) and contains lots of chr(0) characters.The string I need to locate also contains chr(0) characters. In fact it is the following string:

chr(100) & chr(0) & chr(0) & chr(163)

This is a marker in the image file for items I need to process.So I though I would do the following:

Dim sFileBuffer as String = system.io.file.readalltext("myimagefile")
Dim sLookFor as String = chr(100) & chr(0) & chr(0) & chr(163)
Dim iLocation as Integer = sFileBuffer.IndexOf(sLookFor)

The problem is that, although the characters in sLookFor definitely exist inside of sFileBuffer - IndexOf will always return -1 (not found).I tried the following:

Dim Marker() as Byte = {100, 0, 0 , 163}
Dim sLookFor as String = System.Text.Encoding.UTF8.GetString(Marker)
Dim sFileBuffer as String = system.io.file.readalltext("myimagefile", Encoding.UTF8)
Dim iLocation as Integer = sFileBuffer.IndexOf(sLookFor)

But this appears to only find occurrences of Chr(100) & Chr(0) - not the full 4 character sequence I desire. It appears to see the second Chr(0) as a termination of the search string.I think the sticking point here is the null. Yes - I can string.replace(chr(0), Chr(255)) in both the sLookFor and the sFileBuffer and adjust my search accordingly - but that seems like a mess to me.Is there not a way to search a buffer of binary data? I've tried working with byte arrays - but there appears to be no way to easily search for a sequence of byte values - just individual elements in the array.

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Buffer Cannot Be Null - Parameter Name: Buffer

Dec 15, 2011

[Code]...

This is my code for retrieving pictures, it was working before but then i accidentally deleted the table and i created it again with the same name and same fields. and now whenever i open the form with the picture, there was a message box error. it says Buffer cannot be null. Parameter name: buffer I don't know what i did wrong.

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VS 2010 String Conversion - EValue Of Type 'String' Cannot Be Converted To 'System.Windows.Forms.TextBox'

Apr 8, 2011

I'm trying to code a program but this error repeatedly shows up and I can't for the life of me figure it out EValue of type 'String' cannot be converted to 'System.Windows.Forms.TextBox'. It appears in relation to this code

[Code]...

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.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")

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.net - C#: UniCode To String Conversion?

Nov 15, 2010

How can I Convert a Unicode value to its equivalent string for example i have "రమెశ్" and i need a function that accepts this unicode value and returns a string I was looking at the System.Text.Encoding.Convert() function but that does not take in a Unicode value, it takes 2 encodings and a byte array. I bascially have a byte array that I need to save in a string field and then come back later and convert the string first back to a byte array. So i use ByteConverter.GetString(byteArray) to save the byte array to a string but can't get it back to a byte array.

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C# - String Escape Conversion .net?

Nov 28, 2011

I need to convert this string to the proper form in my vb,net code

if (c == '"') {
s.Append('"');
} else if (c == '\') {
s.Append('\');
} else if (c == '/') {

[Code]...

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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.

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Conversion From String Not Valid

Mar 4, 2010

i have a program that you enter a code and your selection goes ito a richtextbox and is then added up in another as you select more items, i have run into a problem it worked a few days ago but now will not.

Dim dectotal As Decimal
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

[Code]....

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Conversion From String To Integer?

Nov 8, 2009

I get an InvalidCastException was unhandled on converting the .value to .text but I can't figure out how to convert it. Tried a few different ways but nothing seems to work. load a file from disk and have that be assigned to the trackbar.value?

Dim FileName = (App_Path() & "SettingsPingTimeout.txt")
If File.Exists(FileName) Then
lblPingTimeout.Text = "Ping Timeout: " &

[Code]....

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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?

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Conversion Of A String To Possibly Hex Or Something Else

Dec 27, 2010

I am trying to rewrite a php function to vb.net and can't find out what the heck this does... I thought it did HEX, but I am getting a different value.[code]so basically I need something that takes each character and finds whatever "0x0" is doing.

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Conversion Of DBNULL To String?

Apr 17, 2009

Is it possible to converty a type System.DBNULL to a string type?

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DateTime Conversion From String?

Jun 18, 2012

I am getting this datetime format in an xml file:

2012-06-14T11:15:41.587-07:00
2012-06-14T10:49:32.397-07:00
2012-06-11T11:10:49.2-07:00

I believe I understand some of it, please correct me if I am wrong:

2012-06-14 = date

T = time identifier

10:49:32.397 = hour min second milliseconds

-07:00 = I have no idea

I need to convert this to something I can sort on for my datagrid view.

When I try something like this:

Console.WriteLine(String.Format("{0:d/M/yyyy HH:mm:ss}", "2012-06-14T10:49:32.397-07:00"))

I'm getting the original string back out with no conversion.

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DateTime To String Bad Conversion?

Nov 22, 2010

I'm pulling a saved DateTime using

Dim testDate As DateTime
testDate = rsQuery.Fields("ScenarioDate").Value

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Hexadecimal To String Conversion?

Mar 1, 2010

I am currently working on a software that will convert a string to it's hexadecimal equivalent and back. I have created the following code to make the convert the string to hexadecimal, but I cannot figure out how to get it back.

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim skill As String
skill = RichTextBox1.Text
Dim skillfullbyte() As Byte

[code]....

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String To Date Conversion

Dec 3, 2008

I have a date that is in string format and I want to put it in a datetime field. I tried

[Code]...

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String To Integer Conversion?

Apr 25, 2011

I am trying to write a function which accepts a string as input and gives the integer as output,The string can be in any of these format for ex:2,500.75 or 2.500,7501 or 2'500.7513 or 2500,254 the output of function should be like 2500.56 Basically trying to get rid of the thousand separator which can be either a comma,or apostrophe. ..

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String To Number Conversion?

Nov 27, 2010

I have a string such as

Dim my_sum As string = "100*10-5"

but when i do this:

msgbox(mysum)

it will output "100*10-5"

but i want it too output it so it works the sum out which should be 995

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String To Unicode Conversion

Nov 12, 2009

How could i convert a Greek string, to Unicode with VB.NET, without knowing the source encoding?

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Colordialog Conversion To Number Rather Than String?

Aug 7, 2009

colordialog1.color will yield "Color [A=255, R=95, G=33, B=222]", but i would like to return an integer like 2349821 instead. how is this possible?

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Compiler Conversion From String To Number

Apr 18, 2011

This is more of a curiosity question on what the VB compiler is doing. Basically the following code generates an error,
If "String" = CInt(1) Then
End If
As it should. What makes me curious is the error reported is
Conversion from string "String" to type 'Double' is not valid.
So, I guess my question is, why is the compiler attempting to convert to a Double when I would assume it should be converting to Integer?

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Complement Hex String To Double Conversion

May 27, 2010

Here's my code, it works but its not elegant --- can this be improved? The final multiplication is done for the Analog to Digital conversion (weight of the LSB).
Public
Class Form1
Private
Sub Button1_Click(ByVal
sender As System.Object,
[Code] ......

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Conversion From String To Date In Label

Jun 28, 2011

i am trying to put my string that i receive in yyyy/mm/dd format in my label.i am how ever getting the following error..Conversion from string "20110627" to type 'Date' is not valid.[code]

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Conversion From String To Date Not Valid?

Aug 2, 2010

I have a string in the format of 20100730 which i need to convert to UK format of 30/07/2010.

When i try to set 20100730 as a date it says it is not valid. Is there another way i can do this?

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Conversion From String To Double Is Not Valid?

Dec 10, 2009

I have a form to calculate charges based on input data and charges stored in an array. When I try to save an entry to a file my program crashes and I get the error "Conversion from string "" to type 'Double' is not valid.

If rdoDay.Checked = True Then
Quote.DrivingHrs = txtDrivingHours.Text
Quote.WaitingCount = txtWaiting.Text

[Code].....

The error highlights the last line of the if statement beginning "Quote.TripCost" as the error, but I don't understand why..

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Conversion From String To Integer Not Valid

Mar 19, 2010

Heres my code:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim product As String

[Code]....

Its says conversion from String to Integer not valid for this line: sales = InputBox("Please Enter Your Product Sales: ")

Also, when the first messagebox comes, how can I make it when you select "cancel", the programme then exits the sub routine and a second messagebox dosent come up?

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Conversion From String To Type 'Boolean'

Apr 7, 2010

I've got a routine that checks a website my my external address. What I'd like to do is loop through the string just to get the first 15 numbers and full stops (periods). But that isn't my question, my problem is I've got this routine that isn't building because of a string conversion issue. I don't know how to correct it.

[Code]...

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Ctype Operator - Conversion From And To String

Sep 24, 2010

I have a class that overrides Ctype operator to have conversion from and to String :
Public Class TotoToString
Property value As String
Public Sub New(ByVal V As String)
Me.value = V
End Sub
[Code] .....

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