Checkbox Tick Generates An Error?
Jul 1, 2010
I have three checkboxes on my datagridview namely, Yes, No, Inv. If the value is set to True in the table which populates the datagridview the respective checkbox is checked and if false unchecked.Now, when on runtime I try to check a checkbox on the Yes Column I receive the followinf error;
DataGridView Default Error Dialog
The following exception occurred in the DataGridView:
System.FormatException: is not valid value for Boolean. -->System.Formatexception: String was not recognised as a valid Boolean.
at System.Boolean.Prase(String value)
at system.componentModel.BooleanConverter.ConvertFrom(ITpeDescriptorContext context. CultureInfo culture, Object value).........
The No and Inv allow me to check and uncheck the checkboxes as many as I want without generating the error.
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Apr 13, 2010
I am building an application in Visual Studio containing various tables and input boxes. Its part of my coursework. I have a table that has two input text fields and above the boxes is a check box. I have created a calculation in VB that only includes the data in the text fields when the check box is ticked. What I want to do now is have the two text fields as un-editable until you tick the check box? or greyed out?
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Jul 27, 2011
Im just starting to create a check in/out application and was wondering - how do you get a tick/dot in a box on click of a button?
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Dec 5, 2010
I am trying to pass a LIKE parameter to a SELECT statement but receive an that strSearch is an invalid field name error:
Private Sub Search()
Dim strSearch As String
strSearch = txtSearch.Text & "%"
[code]....
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Sep 27, 2011
I'm trying to populate class properties where one property is a list collection. I get a NullReferenceException when trying to add to the list collection. The code (litlle bit simplified) is here:
Public Class Portfolio
Property Name As String
Property Assets As List(Of Asset)
Public Sub Populate(ByVal data As DataTable)
For Each row As DataRow In data.Rows
[Code] .....
I have a nested class "Asset" inside the class "Portfolio". Everything goes ok until the line
Me.Assets.Add(asset)
Which gives me the NullReferenceException error.
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Nov 28, 2009
I have 3 forms 1 -mainform which loads when program is open, and where you select the datafile you want to use and input default information in about 20 textboxes 2 butons 1 to each page 2 -has 3 comboboxes and about 20 textboxes worth of information pulled from the database. then 20 textboxes the user can enter values to compare against the default values coming from form1. and 20 boxes that have calculation results 2 buttons one to each page 3 -same as form2
I created a textbox font format function in form 3
When I load program and click button for form3 everything works fine, i can then click button to take me to form2 and vice versa back and forth no problem
When I load program and click button to form2 I get a date casting error from the function on form 3
Why would I even get this if i havent shown form3 yet??
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Apr 21, 2009
I am trying to send an email from my program, but am getting an error.The error is: "Mailbox unavailable. The server response was: 5.7.1 Unable to relay"The puzzling thing is that I only get this error with addresses not on our local LAN. This code generates the error:
Private Sub btnSendMail_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnSendMail.Click
Dim Message As String = "This is a test message to validate the email transmission
[code].....
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May 30, 2010
I created an application with some Crystal Reports. I published the application and installed it on the machine which is my develop machine. This machine has Vista on it and is runnig the application 100%. When I install it on a different machine with windows XP, it runs fine until it tries to load the mybase.new. It generates a windows error with no description.
This is a system generated sub:
[CODE]......................
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Feb 8, 2012
Code:
Whenever the textbox says "Default" and I click on the checkbox, the msgbox pops up twice. Any way to fix this?
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Sep 9, 2011
I've got a project that uses a third party OCX. The OCX was recently updated with a new method. I'm trying to insert code that utilizes that new method:
EPS.Refresh_IO_Link(ControllerRow("ControllerPort"), ControllerRow("ControllerSettings"))
It compiles fine, but when I try to run it from within VS2010 it generates the following error:
'Refresh_IO_Link' is not a member of 'AxEPSIO.AxctlEPSIO'.
This is not true. It shows up in Intellisense, and if I do a rebuild the error goes away. However running it in debug mode always generates the error.I've tried cleaning and rebuilding the solution, but have the same error each time.
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Jan 29, 2009
I have a datgridview with a checkbox that keeps giving me an error. I have checked the data type in SQL(2008) table and I have it set to CHAR(1), NULL = Y, Default value = ('N'). Image attached that shows the error.
The data loads into the grid except for the checkbox state (checked - not checked)Here is my bindings and add column section. Note: The grid will only display info. Text boxes and a checkbox above the grid will actually be the input source.
[Code]...
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Sep 24, 2010
basically i have 16 checkboxes that indicate the status of digital inputs, either checked or unchecked, but rather than adress each and every one of them with a pile of repetative code, i set up a for-next loop and tried to change the status of the checkboxes with - is for index = 0 to 15, if blah=true then checkbox(index) = checked else checkbox(index) = uncheckedBut i get error- checkbox is a type and cannot be used as an expression.
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Apr 11, 2011
I have a form that has a datatable on it with the following code:
[Code]...
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Nov 28, 2010
I have programmed a web browser with Visual Basic 2010 Express and came across a major bug. Whenever I try to click a checkbox on a certain website, this error message appears:
An error has occurred in the script on this page.
Line: 193
Char: 9
Code: 0
URL: [URL]
Do you want to continue running scripts on this page?
[Yes] [No]
After clicking yes or no it just pops up again and I have to open the Task Manager just to close the browser.
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Mar 11, 2010
This code should get one random line from sample.txt and put it in Label1 - problem is that it's only getting line 2. Every single time.
Dim ioLine As String ' Going to hold one line at a time
Dim ioLines As String ' Going to hold whole file
Dim ioFile As New StreamReader("sample.txt")
[code]....
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Apr 15, 2011
I have a question, I can't really find the answer...Basically I have 2 FormsIn form number 1 I have 2 pictureboxes. I want to create a checkbox in form2 that says if checkbox 1 is checked then show picture 1 in form 1
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May 20, 2010
I have a situation where I want to run the code in the Tick event ONLY ONCE not on the interval i have the timer set too.So I figured I would just do thisRaiseEvent MasterTimer.TickBut that gies an error saying mastertimer is not part of the class.Why won't that work?How do I call the Tick event manually without Start() Stop() the timer?
dp.SyntaxHighlighter.ClipboardSwf = '/dp.SyntaxHighlighter/Scripts/clipboard.swf'
dp.SyntaxHighlighter.HighlightAll('767f329f335e418494d276b159cf89c1')
[code].....
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Jan 2, 2012
I have a ListView with Checkboxes in vb.net and what I want to do is when the user check the checkbox, the program ignore the response of the user in checking the checkbox, instead it leaves the checkbox uncheck.
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Aug 15, 2011
I am creating an Interactive map which displays the facilities when the user clicks on the Checkbox, such as toilets.It will display all the toilet locations via PictureBoxes.I want to do this without having to write all this code?[code].....
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Dec 30, 2010
i have 5 checkboxes in webform and textbox1... when i search the record using the date specified in textbox1 when i enter 11-Dec-2010 in Textbox1 and click on submit button then checkbox1, checkbox2, and checkbox3 will be disabled and unchecked .....
[Code]...
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Nov 9, 2009
Is it possible to have smaller intervall than 1 in a timer?
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Feb 12, 2011
I'm new with VB and a time program I'm trying to complete is incorporating a tick event. I have the code I need to use, and have the timer placed within the VB Designer but when I start the debugging process, 12:00:00 pops up in the text box. I would like to have it start incrementing after I set the hour, minute and second and initiate the Set Time click event. The code I have for the timer is
[Code]...
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Aug 6, 2009
I have a rather large DBML file and recently discovered that Visual Studio's MSLinqToSQLGenerator is generating different output than:
SqlMetal.exe All.dbml /code:All.designer.vb /namespace:LINQ2FSE /pluralize /provider:SQL2005
It seems to have dropped an arbitrary (and I think relatively small) set of associations from the generated VB code. But SQLMetal works fine. Shouldn't the output be the same?
After further research, I find that the difference seems to be associations on entities that involve properties that are also used on other associations on the same entity with a different number of columns. For example:
Entity A has columns id and name
Entity B has columns id, name and fkA (foreign key to A)
Entity C has columns id, name, fkA and fkB (nullable fkB)
Entity C has association C_A, which links fkA to A.id
it also has association C_B, which links fkA and fkB to B.fkA and B.id The code for properties supporting C_B will not be generated by Visual Studio, but will be generated by SqlMetal.exe.Is this kind of association allowed? Is there a reason the code is being generated differently?
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Jul 3, 2009
I need to bound the license keys to one hardware of the customer's computers.Now I get the CPU Id (but is not unique id) and already some business only bought 1 license and install the app + 1 computer with the same CPU Id.There is any part of the hardware that generates unique ID? The motherboard? [code]
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Apr 26, 2010
ByRef vs ByVal generates errors!?I had a method that used an Object Function Foo(ByRef bar as CustomObject) as Boolean this method generated errors, because some strange .NET Runtime things changed the bar object, causing its Dispose()al.A lot of time spent to understand the thing(where the ... object is changed), until somebody replaced ByRef by ByVal and object wasn't change anymore when passing to this method.As in my case the function Foo does NOT modify the bar, shouldn't ByRef or ByVal have the same effect?[code]
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Jan 31, 2009
I have 2 dgv's on a form that are both alike and even use the same datasource, just one column is different betwenn the two.I manually added the columns and set the datasource and bindings. When I make a change to the properties in one of my dgv's it keeps auto generating the columns I do not need.
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Jan 1, 2009
I am using Visual Basic.NET 2008. I was earlier a VB 6 developer. I found a (VB 6) code online which generates gradient colours on a form. It has a small sub (routine) which does the trick. If we pass red, green and blue values then form's backcolour changes and it appears like a gradient.Now that code is not working in VB.NET.i mean is there an easier way to generate gradient colours in VB.NET (2008)convert the code I have into .net specific so form's backcolour becomes gradient.I have attached a zip file which contains the code.
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Feb 15, 2010
I've wondered if i can make it so when i click on a checkbox you may not beable to check another. And i do not want to use radio buttons
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Nov 22, 2011
I have a DataGridViewCheckBoxColumn who's column name is "booReadyToReport want to hide all the checkboxes in this column if "bintAnalyteCodeID" doesn't equal the selected value in a combobox on my form. ut I run this bit of code the DataGridView DataError event fires currently, have nothing in the event except an comment. he code seems to work, but I'm new to VB.NET and I'm wondering if this is the correct way to handle thishould I use the CellPainting event?
highlight rows with RBF3
For Each dr As DataGridViewRow In Me.dgvCalculatedResults.Rows
f dr.Cells("bintAnalyteCodeID").Value = Me.cbxAnalyte.SelectedValue Then
[code].....
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Jun 12, 2009
i suppose to develop a s/w.. which automatically generates a timetable for the entire college.. on all possible classes..
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