DatagridView Checkbox Error - "Conversion From String "" To Type 'Boolean' Is Not Valid"
Mar 1, 2010
Am using vb.net 2008 and sql2008 and I want to loop thru frmMovement.DataGridView1 and the checked rows shd get populated into frmMovementReceivedFiles.DataGridView2. But I used Cbool, Boolean.TryParse to convert the the checked value but I still get but still the error: "Conversion from string "" to type 'Boolean' is not valid"
The code is as follows. Or ss there anyway to loop thru the checkboxes and populate them in another DatagridView2?
CODE:
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Sep 7, 2010
I want to connect to the proxy server using with the webbrowser while reads the strings of the proxy username, password, ip and the ports in each textbox.ere it is the
Imports System.Net
Imports System.IO
Public Class Form1
[code]....
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Jan 27, 2010
i have a problem with my code: [code] At the bold part, when i goto debug my program i get the error "Conversion from string "TrueFalse" to type 'Boolean' is not valid."
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Feb 10, 2009
i want to save the settings of the checboxes so next startup it will take the settings how they were put in. But it gives an error when i am opening the "Settings tab" : Conversion from string "Settings" to type 'Boolean' is not valid.
Ill post my code here:
Private Sub Settings1234hide_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
CheckBox1.Checked = My.Settings.MyBool
[Code]......
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Sep 7, 2011
i'm getting error like this An error occurred creating the form. See Exception.InnerException for details. The error is: Conversion from string "" to type 'Boolean' is not valid.
my code was
If UsernameTextBox.Text = 1 And PasswordTextBox.Text = 1 Then
PIF.Show()
End If
mithila.s
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Oct 24, 2011
The error occurs on the line If wba.Selected = "MARKETING CODE" Then.
[Code]...
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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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Sep 6, 2009
Private Sub ConvertLabel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ConvertLabel.Click
If UserBox.Text = String.Empty Or "Username" Then
[Code]....
Runtime I get this error:
Conversion from string "Username" to type 'Boolean' is not valid.
on the line
If UserBox.Text = String.Empty Or "Username" Then
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Apr 14, 2010
See the end of this message for details on invoking just-in-time (JIT) debugging instead of this dialog box.
************** Exception Text **************
System.InvalidCastException: Conversion from string "" to type 'Boolean' is not valid. ---> System.FormatException: Input string was not in a correct format.
at Microsoft.VisualBasic.CompilerServices.Conversions.ParseDouble(String Value, NumberFormatInfo NumberFormat)
[Code]....
When JIT debugging is enabled, any unhandled exception will be sent to the JIT debugger registered on the computer rather than be handled by this dialog box.
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Jun 3, 2009
im in the mists of making a hangman game and i almost done and i just stumbled upon a error here is all the code
Public Module Module1
Public letter1 As String
Public letter2 As String
[Code].....
i get the error in the title on the bold underlined text after i input a letter thats not in the word
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Oct 9, 2010
I wrote this block of code below 'Once all the score zones have been double clicked, the game is over
If Me.LabelOnes.Text <> "" And LabelTwos.Text <> "" And _
LabelThrees.Text <> "" And LabelFours.Text <> "" And _
LabelFives.Text <> "" And LabelSixes.Text <> "" And _
[code]....
I get this runtime error message after only one of the score zones has been filled
Conversion from string "---" to type 'Boolean' is not valid.
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Mar 18, 2010
When I run the following code If DropDownListKey.SelectedValue = "Card" Or "Key" Then I get an error message as follows: Conversion from string "Key" to type 'Boolean' is not valid. I can't figure out why I would get this error if I was just checking the value of the dropdownlist control.
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May 25, 2011
I now have SQL Parameters set up and I'm using them to save/delete/add my data. This all works well, except when it's trying to save a combobox to the datatable it appears with the error above.Majority of my comboboxes have datasources, and the valuemembers of these are the actual list items, not the ID's of the list items.I'm not sure why this error could be happening, I'm fairly sure I've connected everything to the binding source correctly; I've checked it a few times.Does anybody know what the cause of this could be? I've looked around a bit and I haven't found much
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Jun 15, 2009
how can I solve this error without having to fill all of my fields. Some of the fields in my database are Nulls and some have records.
Error: Conversion from type 'DBNull' to type 'String' is not valid.
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May 2, 2010
I am getting the error "Conversion from type 'DataGridViewTextBoxCell' to type 'String' is not valid." When trying to display a cell from DGV in a listbox.I have my variable for the cell reference as follows:
Dim a As Object
a = DataGridView1(4,1)
To insert it in the listbox as follows:
lstLetter.Items.Add(String.Format(a))
I tried:
lstLetter.Items.Add(a)
This will not actually display the entry inside the referenced cell, it shows this in my listbox instead:
DataGridView TextBoxCell { ColumnIndex=4, RowIndex=1 }
how I need to convert this to display.
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Jul 29, 2011
I was tried to get quantity from db make use of the selection in list box. I got answered with listbox1. If i selected the item in listbox1 the quantity would appear in textbox1. But in this same code will not work for listbox2 with textbox4.. Here i given the code...
$Con.open()
$Dim cd as new oledb.oledbcommand("Select Quantity from tlist where tool_name"& "'"listbox2.selecteditem & "'" & "", con)
[Code]....
Here i got the error as "Conversion from type DBNull to type string is not valid"
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Dec 13, 2010
I've been getting this error when pulling data from a recordset. It is coming from a null entry and as a newbie to VB2008 I'm not sure how to get around this.
here is my code lblShipping.Text = reader("CARRIERCODE")
the error:Conversion from type 'DBNull' to type 'String' is not valid. Basically what i'm attempting to accomplish is to see if there is anything in that field. If so put it into the text box if not leave it blank.
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Jun 5, 2011
i have code below...but i cannot run because this error..."Conversion from type 'DBNull' to type 'Boolean' is not valid."
CheckBox1.Checked = DataGridView2.CurrentRow.Cells(10).Value
CheckBox2.Checked = DataGridView2.CurrentRow.Cells(11).Value
CheckBox3.Checked = DataGridView2.CurrentRow.Cells(12).Value
CheckBox4.Checked = DataGridView2.CurrentRow.Cells(13).Value
CheckBox5.Checked = DataGridView2.CurrentRow.Cells(14).Value
how i have to set in my table to insert input 1 or 0..
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Jun 25, 2011
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]
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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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Apr 17, 2012
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
[Code]...
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Sep 3, 2009
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]....
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Jun 9, 2011
Imports System
Imports System.Data
Imports System.Data.SqlClient[code]....
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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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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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Jul 9, 2009
<!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4; mso-font-charset:1; mso-generic-font-family:roman; mso-font-format:other; mso-font-pitch:variable; mso-font-signature:0 0 0 0 0 0;} @font-face {font-family:Calibri; panose-1:2 15 5 2 2 2 4 3 2 4; mso-font-charset:0; mso-generic-font-family:swiss; mso-font-pitch:variable; mso-font-signature:-1610611985 1073750139 0 0 159 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-
[code]...
Error :Conversion from string "LastRunEnd" to type 'Date' is not valid.
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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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Dec 10, 2009
Why am I getting that error message? This is the code which it's happening to:
Public Class frmford
Dim LoanAmount, InitialPrice, Make, TradeIn, OriginationFee, DepositAmount, Model, Options, AirConditioningTax, GST, PST, Total, Subtotal, APR, Months, RoofRack, SunRoof, SideAirBags, TintedGlass, RearSpoiler, GPS, PowerLocks, FreightAndPDI,
[Code]....
I tried to Dim those variables as double and it didn't work either.
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Sep 3, 2010
When I open by form and close it when txtprojend.text is empty I receive unhandled exceptional error in the code below; How can ignore and never receive the exceptional unhandled problem. Conversion from string "" to type 'Date' is not valid.
Dim datProjEnd As Date = CDate(txtprojend.Text)
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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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