Error "debugger Cannot Convert Data Type From String To Double"

May 7, 2012

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?

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Create A Function Which Have Either 1 Parameter With A String As Data Type Or 2 Parameters With Double As Data Type?

Jun 11, 2012

I need to create a function which have either 1 parameter with a string as data type or 2 parameters with double as data type.Something like the substring method.

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Converting Double Data Type To String Data Type

Jan 31, 2010

I have a program that calculates commission, but if the commission is nothing then I do not want it to show a zero commission. I want a message box to show a message that there is no commission earned.

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Getting Conversion From String To Type Double Error

Dec 4, 2009

I have code that loops through a string array to add words one at a time to a line of limited length. I am trying to fit a phrase on up to four lines, centering the words on each line. My code appears to add the first word but on the 2nd word I get a "conversion from string "IS" to type 'Double' is not valid" error.

Here is my code so far:

varResult = Split(strPhrase)
intWordCnt = UBound(varResult) 'count words in phrase
'make words fit on one line

[Code]....

The phrase in strPhrase is "GOD IS LOVE"

I don't understand why I am getting this error when I didn't on the first loop through the code and it Put the word "GOD" into the line.

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Forms :: Conversion From String To Type Double Is Not Valid' Error?

Jun 25, 2011

I wanna perform a function like this. When you save a record, I need the primary key of that record to be auto-generated (X001). Say, when you create a new record and save it, it should be saved like X002 automatically.So to test this before I implement that on this project I'm working on, I created this little program.form.png

All its supposed to do is, when you click on the OK button it shows a code that is fetched from a database table. (X001). Then when you click on it ober and over again. The number should increase. X002, X003, X004... so on.Here's my code

Imports System.Data.SqlClient
Public Class Form1
Private Sub btnOK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnOK.Click[code]....

But when I run it, it throws this conversion error.exception error.png.I know its pretty straight forward so I tried to correct it with what I know

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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

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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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Explicit Conversion - Convert The Variable D From Double Type To Integer Type And Store The Result As 132

Oct 22, 2009

I want to use explicit conversion (CType function in VB.NET) to convert the variable d from double type to integer type and store the result as 132.

Imports System.Console
Module Module1

Sub Main()

[CODE]...

This is my code. But Visual Basic tells me an error: Error1Type 'i' is not defined.C:\Users\mihaispr\Desktop\Conversie explicita\Conversie explicita\Module1.vb1922Conversie explicita

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C# - Solve This Error "Cannot Convert Lambda Expression To Type 'string' Because It Is Not A Delegate Type"

Jun 12, 2010

. I get this error: "Cannot convert lambda expression to type 'string' because it is not a delegate type" - keyword select become underlined in blue

[Code]...

Above code should displays drop list of employees first name and last name in a combo box

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C# - Error Convert Data Type?

May 22, 2012

i am getting id from the url and pass it to sqldatasource - selectcommand i get thefollowing error : Conversion failed when converting the varchar value '<%=MyIdVal%> to data type int.

code behind :
Public Partial Class Edit
Inherits System.Web.UI.Page

[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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Error Debugging - Conversion From String "" To Type 'Double' Is Not Valid

Jan 12, 2011

I'm doing some error debugging trying to get the errors on our website down to a minimum and there seems to be an error that is popping up quite a lot Conversion from string "" to type 'Double' is not valid.

I'm unable to replicate this problem but I can see that it is happening.I've been looking through the code in one of the pages and strolled across this

Dim varWeek As String
If varWeek < 10 Then
'Do something'
End If

Could this be causing the problem as it is trying to see if a String is less than 10 which is an Integer?As I said before as I am unable to see this error in the first place so changing this to an Integer doesn't change anything on my system.

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Datgridview - Error - "double To Type String Is Not Valid"

Jun 6, 2011

I have a few question Regarding VB.NET 1) I have a datgridview and i want when user input the datagrid 3rd cell the 4 cell of datagrid readonly = false means user not input value in 4th cell 2)i want a autonumber generate in textbox is alphanumeric like "vendor9" or " "vendor10" bt when i go to save this it give error of "double to type string is not valid" i have use a following coding

CODE:

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Error - Conversion From String "" To Type 'Double' Is Not Valid

Nov 18, 2010

I have a bad bug in my program where if a user presses the check(calculate) button when there is no input in the textbox the program displays this error: "Conversion from string "" to type 'Double' is not valid." I would like to resolve this but I am not sure how to do the conversion. I was thinking possibly CType but I am hearing talk of parsing. How do I go about this? the textbox is called mskTxtInput and the button object is called btnCheck which does all the calculation and processing.

Private Sub btnCheck_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCheck.Click
pic1.Visible = False 'hide picture
pic1.Image = My.Resources.A

[code]....

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Error - Conversion From String "10:1:1" To Double Type Is Invalid

Oct 11, 2011

iam passing a textbox value(the value is 10:1:1) into a string and when iam running the application iam getting the following error "coversion from string "10:1:1" to double type is invalid". kindly find the code below and help me on the same: (also the textbox values should be greater than 0 always)

Dim strEncrypt As String = txtData.Text
If strEncrypt > 0 Then // I am getting the error here
txtEncryptedData.Text = Encrypt(strEncrypt)
Else

[code]....

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Error: Conversion From String "" To Type 'Double' Is Not Valid

Sep 21, 2009

I am getting an error: Conversion from string "" to type 'Double' is not valid.If any of my textboxes are blank even though I have used an if AndAlso statement.

Private Sub tbWidth_TextChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles tbWidth.TextChanged
Dim wMath = tbWidth.Text / Form1.tslblWidth.Text
Dim hMath = Form1.tslblHeight.Text * wMath
If Form1.tslblWidth.Text IsNot Nothing AndAlso tbWidth.Text IsNot Nothing Then
tbHeight.Text = hMath
End If
End Sub

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.net - Column Is Empty Then Error As Conversion From String "" To Type 'Double' Is Not Valid?

Oct 22, 2011

Using VB.Net If the grid cell value is empty, i am getting error as "Conversion from string "" to type 'Double' is not valid"Code (gridview_CellLeave)

Dim z1, z2, z3, z4 As Int32
If grvList.CurrentRow.Cells(1).Value <> "" Then
z1 = grvList.CurrentRow.Cells(1).Value
End If
If grvList.CurrentRow.Cells(2).Value <> "" Then

[Code]...

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Query Error And Conversion From String "Insert Into Table1 (cust_id," To Type 'Double' Is Not Valid

Jun 3, 2011

1st i get this error

query error and Conversion from string "Insert into Table1 (cust_id," to type 'Double' is not valid.

when inserting data to database 2nd error is

when use employee name to get employee id i got result always 0 here is the code

" select id from customers where name2='" & ComboBox1.Text & "'"

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VS 2008 : Error: Conversion From String "The World Is Veiled In Darkness." To Type 'Double' Is Not Valid

Feb 21, 2010

error: Conversion from string "The world is veiled in darkness." to type 'Double' is not valid.

If Label1.Text = 8 Then
Label2.Visible = true
End If

im trying to make label1 .visible = true when label5.text = 8 i set the properties to label1.text to false so when the counter hits 8 it turns label1.visible = true

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Vb6 Double Versus .Net Double Data Type?

Aug 11, 2010

When i use VB6 i get the following outputs

961.605 * 100 = 96161
936.495 * 100 = 93650
929.295 * 100 = 92929

NOW..... When i do the above in vb.net 2005 i get the following

961.605 * 100 = 96160
936.495 * 100 = 93650
929.295 * 100 = 92930

How can i get the same output as the VB results. And i have tired it ! Type conversions, math functions, everything i can think of to get the same VB6 output !

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Combobox- Error" Conversion From String "" To Type 'Double' Is Not Valid?

Jul 15, 2010

I have the following code which is not working, giving an error Conversion from string "" to type 'Double' is not valid.What am trying to do is if the shown value on the combobox is empty then set the two textboxes to empty strings.

If cmbactiveproj.SelectedIndex = "" Then
txtclientOrgnw.Text = ""
txtProjectID.Text = ""
End If

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Error "Conversion From String "0/" To Type 'Double' Is Not Valid

Jan 22, 2010

i am getting error like "Conversion from string "0/" to type 'Double' is not valid." in the underline part of the coding ..........
here iam using sqlserver-2005

here my coding is

Protected Sub save_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles save.Click
Dim conn As New SqlConnection(ConfigurationManager.ConnectionStrings("guest1").ConnectionString())
Dim booking_no As Double
Dim year As Double

[code]....

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Ado.net Error (Unable To Cast Object Of Type 'System.String' To Type 'System.Data.IDataReader'.)?

Jan 29, 2012

I am getting this error when I am tring to load string type to data table)

Using connection As New SqlConnection("connectionstring;")
connection.Open()
Using Command As New SqlCommand("SELECT ClientId,forename,surname from t_clientdetails

[code].....

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ASP.Net Error - Unable To Cast Object Of Type 'System.String' To Type 'System.Data.DataTable'

Oct 4, 2009

I get the below error Unable to cast object of type 'System.String' to type 'System.Data.DataTable'.This is the code I'm using

Dim str As String = String.Empty
If (Session("Brief") IsNot Nothing) Then
Dim dt As DataTable = Session("Brief")
If (dt.Rows.Count > 0) Then

[code]....

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Vb6 Double Vs Double Data Type

Aug 11, 2010

When i use VB6 i get the following outputs

[Code]...

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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].....

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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?

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Cannnot Convert From String To Double?

Mar 24, 2010

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.

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Convert String Into Double Array

Aug 4, 2009

How to convert a string array into double array?

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Convert String To Double Array?

Apr 18, 2012

I need to take this string:

Dim tmpTry As String = "10, 20, 30, 40, 50, 52, 20, 20, 10, 35, 3, 8, 47, 7, 2, 5, 55, 8, 0, 0, 6, 55, 0, 2, 12, 0, 0, 21, 14, 0, 3"

And convert it to a double array:

Dim arrNumOfVisits As Double() = New Double(tmpTry) {}

How do i go about doing that?

FYI the arrNumOfVisits goes into a ParamArray System.Collections.IEnumerable()

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