I am currently making a project for school and this project is to determent the poker hand, where the user can only check 5 check box and each checkbox represent a card , and when I try to test it and check the box it would let me and this message popped up:
Conversion from string "" to type 'Integer' is not valid.
And the arrow point to this line of code
i = CInt(Mid(strChk, 1, 2))
i have a text box and i want to insert the textbox value to my sql procedure in server and then generate record in the datagrid view ... the parameter in sql server i declare as varchar and actua database column item datatype is nchar.. anyway in what suitable datatype that i have to put in my visual basic for the textbox in order to transfer the vlaue to sql procedure and generate result
View 7 RepliesI have the following IF Statement checking if the function GetNexstAddress (which gets the ClientID from GetClientFleetInfo(i).CLIENTID) . SECONDARYCITY
is there.
If GetNextAddress(GetClientFleetInfo(i).CLIENTID).SECONDARYCITY(0) = Nothing Then
NextAddress = " No next Destination"
Else
[Code].....
I have the below code in my app... Nothing is declared as a integer so I dont understand or see where the problem could be... It is saying:
Conversion from string "9838 Co Rd 47" to type 'Integer' is not valid.
The address is flowing through the entire function as a string the only place I think it could be getting changed somehow is in a function call... Below is the function that throws the exception. Followed by the function that returns the address.[code]...
Public Class Form1
Private Sub RealTime_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RealTime.Tick
Real_Sec.Text = DateAndTime.Now.Second
End Sub
Private Sub Real_Sec_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Real_Sec.TextChanged
Sim_Sec.Text = Sim_Sec.Text + 1
If Sim_Sec.Text > 59 Then
Sim_Sec.Text = 0
End If
End Sub
End Class
When the timer is on, it will tell the current seconds in real time, and when the text in the textbox for the Real_Sec changes, it will increment the text or the value in the Simulated seconds... FROM 0... No matter where the seconds are in the real seconds, it will display real or simulated seconds in the sim_sec text box... Starting from 0... But there Real Seconds, because the Timer is not accurate. So I Simulate the Real Seconds. How to write it the right way, it's keeps throwing the error:
An error occurred creating the form. See Exception.InnerException for details. The error is: Conversion from string "" to type 'Double' is not valid.
I have a dataset containing a datatable, and I enumerate all rows in that datatable. When trying to format a column in that row, I run into an exception. (Part of) the code is:
For Each dr As DataRow In ds.Tables("records").Rows
file = dr("timestamp").ToString("yyyyMMdd") & "~.wav"
Next
This results in the following error message:
Conversion from string yyyyMMdd to type Integer is not valid. (translated from a Dutch error message to the English equivalent)
dr("timestamp").GetType.FullName results in "System.DateTime", so I don't understand why I run into this exception, as for example Now.ToString("yyyyMMdd") results in "20091002", and "Now" is of the same type as dr("timestamp"), "System.DateTime" that is.
I designed a payroll application and I keep getting the error conversion from string to type Integer is not valid.Also when I enter the name in one of the textboxes it reads form and not my name.[code]
View 2 RepliesI am working on a program that has a combobox that gives you selections for email address endings, but when I try to enter it in as part of the final email address get an error. Here is my
mail.To.Add(TextBox1.Text(ComboBox1.Text))
When I click debug, it give me this error. "Conversion from string "@txt.att.net" to type 'Integer' is not valid."
"@txt.att.net" is the value of the combobox selection.
In the end it should be something like: "anything@txt.att.net"
(Textbox1.text = "Anything" & the current ComboBox1.text selection = "@txt.att.net")
I have an InputBox where I want someone to input a number. The number would be an integer. The line looks like this amount1 = InputBox("how many?", "how many?")If they click cancel, it errors out because it can't convert blank ("") to an int. How can I do this with InputBox and not get that error?
View 1 Repliesthere is one search button to see the report on datagridview using year..so when the more items are there in database correspond it year(say 2012)... the above exception is thrown by filling the datgridview,the problem happens when it tries to connect with crystal report,it shows error...Remember that i face this problem only if there are more records in my database(exactly more than 100 rows)...when i delete few rows from the database,it works fine..I have created a table and added that table to a dataset,then assigned that table1 as datasource for crystal report
[Code]...
there is one search button to see the report on datagridview using year..so when the more items are there in database correspond it year(say 2012)... the above exception is thrown by filling the datgridview,the problem happens when it tries to connect with crystal report,it shows error...Remember that i face this problem only if there are more records in my database(exactly more than 100 rows)...when i delete few rows from the database,it works fine..I have created a table and added that table to a dataset,then assigned that table1 as datasource for crystal report
Public Class crystalform1
Dim r As DataRow
Dim t As DataTable
[code]....
I am having problems with the code below. I have copied and pasted the code from a program that I wrote to test and see if the code does work. In that program it does. But when I use the same code in another program I get the following error message. invalidcast exception was unhandled conversion from string to type integer is not valid.
[Code]....
When I use the included code to position an InputBox over the start of a listbox named lb I get the following message: Conversion from string "Fibonacci Demo" to type 'Integer' is not valid.
The code works ok if I remove the L,T, parameters. If i replace L,T with 100,100, I get the same error message.
Dim MyValue, Msg, Title, DefaultVal As String
dim L as integer, T as integer
Msg = "Enter Value > 2 and < 45 to be evaluated"
Title = "Fibonacci Demo"
DefaultVal = "5"
[Code]...
I am using .ToString("#,##0.00") to format a number. I'm sure I have used this before but today it doesn't work.I want to format a System.Double value from the datatable like this 12345.6789 to 12,345.68
Code:
myString = dt.Rows(i)("column_name").ToString("#,##0.00")
gives a System.InvalidCastException:Conversion from string "#,##0.00" to type 'Integer' is not valid.
Public Class dataLayer
Private Shared connection As OleDb.OleDbConnection
Private Shared Sub connect()
connection = New OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" &
[code]....
I am currently working on a school project that requires me to develop a quote system for a heating company. It needs to include Date/Time, Customers Name, Address and phone number which isn't a problem.It also needs to be able to select different heating options each with specified prices (using a combo box), the price also is affected by how big the house is (using radio buttons - big house or small house). It also has to generate an overall price including GST which is 10%.
I have come up with a design and some code, everything works fine for the first option, however, when i clear the form and then attempt to calculate another quote i get the "Conversion from string "Fixed_Fan_Electric" to type 'Integer' is not valid." The other problem i have is the first option in the combo box calculates correctly and after re-opening the form (to avoid the first issue) i select another option from the combo box, the program is unable to calculate a price for it and just leaves the label blank.
[Code]...
Basically I am trying to have it so when they click the save button it changes the timer.interval to what they entered in the textbox.On form load I have it do this.
Timer2.Interval = My.Settings.timer_interval
timertxt.Text = Timer2.Interval / 1000
When they click the save button.
My.Settings.timer_interval = timertxt.Text * 1000
Timer2.Interval = My.Settings.timer_interval
The program works, but it throws an error Conversion from string "" to type 'Integer' is not valid.I understand that the textbox is a string and the Timer Interval is a Integer, make it work without having to click continue after it throws the error.
Im geting a error:InvalidCastException was unhandled by user code Conversion from string "UNITID, INSTNM, ADDR, CITY, STAB" to type 'Integer' is not valid.
Dim
WFSDINSTITUTION As
String
=""
[code]....
Many of you are aware I am making a AiO Character Creator for all tabletop RPG games.
My code is:
Private Sub TextBox2_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox2.TextChanged
Dim totalXP As Double
[Code]......
Error: Conversion from string "" to type 'Integer' is not valid.
Because I am running Windows 7 Ultimate RC 64-bit, would I have to put Int64?
My code is coming up with this error " Conversion from string "" to type 'Integer' is not valid.
Public Class Form2
Dim num1 As Integer
Dim num2 As Integer
[code].....
I have a random generator with a textbox where the user selects the number of randoms they want from a text file that is loaded into a listbox. I want some code to prevent the user from trying to randomly generate more items than what they entered in the text file. I have a messagebox that informs them they entered a higher number than what is in the file, which appears to work until I hit the backspace key to change the number in the textbox. Then I get this error. "Conversion from string "" to type 'Integer' is not valid." I currently have the code in the textbox, text_changed event, not sure if this is the right place. Basically what I want to do is have the message box pop up to inform the user, then reset the textbox back to empty so the user can choose a new number. I already have a textbox keypress event to only accept numbers, no letters. Not sure if I can combine the code to do both.
Private Sub tbxRandom_KeyPress(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles tbxRandom.KeyPress
'only allows numbers to be entered into tbxrandom textbox
[code]....
Trying to insert a record into a db, but I get the following error System.InvalidCastException: Conversion from string "Duck" to type 'Integer' is not valid. ---> System.FormatException: Input string was not in a correct format."Duck" is what I entered into a LNameTextBox.
Here is the code.
Dim myCommand As OleDbCommand = New OleDbCommand("INSERT INTO [Info] ([UIN], [Last Name], [First Name], [Department Code]) VALUES (@UINValue, @LNameValue, @FNameValue, @DeptCodeValue)", myConnection)
myCommand.Parameters.Add("@UINValue", OleDbType.Integer, UINTextBox.Text, "[UIN]")
[code]....
I can't understand why it is trying to converty the Last Name textbox entry to an integer.
I am using :
Dim di As DirectoryInfo = New DirectoryInfo(My.Settings.Outgoing(CreateFolderTextBox.Text)) to create a directory
[CODE]......................
But I get the following error: Conversion from string "testfolder" to type 'Integer' is not valid.
I have 2 forms, frm1 and frm2. frm1 has a combobox, cboLocations and based on what selection is made here, frm2 is loaded and its combobox, cboOffices is populated. I currently have the following code on frm1:
Dim frm2 as New form(cboLocations.SelectedValue.ToString)
frm2.ShowDialog()
When running, I'm getting an InvalidCastException was unhandled...Conversion from string "System.DataDataRowView" to type 'Integer' is not valid." error.
I am having issues writing this string to my SQL 200 database table:
Conversion from string "" to type 'Integer' is not valid.
How can I ensure that my vb.net app writes the above string exactly as it appears, to the field in the table ?
i am acctually reading values from a textbox and passing it to a function .the function sends the passed values to a stored procedure the problem is i have a textbox which takes portno which is integer but its optional to give the value.so if i dnt enter the value of portno in the textbox its giving an error conversion from " " string to type integer is not valid
[Code]...
I keep getting this error message when running my program, what can I do to overcome this?
here is the
Private Sub btnConfirm_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnConfirm.Click
Dim PlayerName As String
[Code]....
i am having some problems when using serialport1.parity..it says that : Conversion from string "None" to type 'Integer' is not valid.
my code is : SerialPort1.Parity = ComboBoxParity.Text how should i go about solving it? and another thing, there is no Flow Control in VB? there is a flow control in hyper terminal in every computer.if there is one, how do i get it out??
Using DataReader on a SQL DB. The field in question is SQL DataType Char(32). See code below. Why am I getting this error? What Integer?[code]...
View 2 RepliesThe project I'm working on is a Multichoice RadioButton quiz with answers and percentintegers. At the end there is a MsgBox that gives the number of answers counted 'correct'and the percent 'correct'. Also after you press the confirm button on that MsgBox it emails the results to the built in information given on the SMTP information. What I am trying to do now is show the input typed into the textbox on FormA in the MsgBox at the very end.
View 3 Replies