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 RepliesI'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
I am getting an error message: Unhandled exception has occurred in your application.conversion from string"" to Double is not valid
I dont get this error when I am in debug mode only when I publish the program.
I am doing a project entitled "Automation of Student admission process".I am having a datafield UGPercent of datatype(18,3) NULL in my database.When i tried to insert it using the following code Insert into Markdetail(UGPercent)values(" & txtperc2.Text & ")..It shows me the error:conversion from string to double is not valid.what is wrong in my code?
here: Markdetail is my table
txtperc2.Text-The textbox used to get the UG percentage.
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.
I noticed that if I leave off the terminating double quote for a string constant in Visual Studio 2010, there is no error or even a warning, i.e.
Dim foo as String = "hi
However, the continuous integration tool we are using flags an error:
error BC30648: String constants must end with a double quote.
Is there some language rule in VB.Net that makes a terminating double quote optional "sometimes"? Is there some setting in Visual Studio that will make it flag this as an error, so I can avoid "breaking the build" in this way?
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 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
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]
View 2 RepliesI 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'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.
message error in server is: conversion from string "NETWORK SERVICE" to 'double' is not valid, the application in my local machine works perfectly, the problem is there in the server. so i can't find in the web what about the "NETWORK SERVICE".
View 3 RepliesI 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:
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]....
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]....
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
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]...
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 & "'"
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
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
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]....
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 RepliesIf 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.
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.
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 RepliesIs 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].....
The message does not appear if a number is not entered - why?
Dim
IAL As Double
Dim inputIAL As Double
[Code].....
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
[Code].....
I would like to format double number like below;[code]Is this possible?
View 1 Replies