Fixing LINQ Query To Be Compatible With Option Strict On
Nov 23, 2011I am in the process of fixing my code to be in line with Option Strict On, but the code below is still throwing an error and I don't know why. What do you think?
[Code]...
ADVERTISEMENT
Fixing Error With Option Strict On?
May 8, 2012I have my code working well but with OPTION STRICT OFF. I have decided to fixed all my errors in the code.However after setting the OPTION STRICT to "On", my code have lots of errors. I was able to fixed most of the errors with the except of this DIM statement where I think I have to insert CDate to (Mid$(row("TIME"), 12, 8) >= minTime) and (Mid$(row("TIME"), 12, 8) >= maxTime):
[Code]...
Linq Query Has An Implicit Cast Error For DataGridViewRow When Option Strict Is Enabled?
Jul 6, 2009I have a DataGridView that is bound to a list of objects called "BaseChange". The BaseChange objects are made up of 4 properties...
ChangeType
ChangeStatus
ChangeDescription
LastChangeDate
The datagridview has columns for all 4 values as well as a 5th (a checkbox column called "colIsSelected"). There is no problem binding the list to the grid and displaying the items. The problem is that the query that gets the selected items in the grid is giving me an implicit cast error when option strict is enabled.
This is the query...
Dim _changes As List(Of BaseChange)
_changes = (From _row As DataGridViewRow In dgvChanges.Rows() _
Where Convert.ToBoolean(_row.Cells(NAME_COLUMN_IS_SELECTED).Value) = True _
Select DirectCast(_row.DataBoundItem, BaseChange)).ToList()
...and it produces the correct results with option strict off. The implicit cast squiggle is on the "row As DataGridViewRow" code, and the full message is "Implicit conversion from 'Object' to 'System.Windows.Forms.DataGridViewRow'*".
If I exclude the "As DataGridViewRow" from the query, I get a late binding error on the _row.Cells and _row.DataBoundItem and this also fails option strict.I need this to work with Option Strict enabled, and in VB.
Linq And Option Strict - "Option Strict On Disallows Late Binding"
Jun 30, 2011[Code]...
I really prefer to keep Option Strict On. the proper way to do this?
Option Strict - Error Option Strict On Disallows Implicit Conversions From 'Object' To 'XtremeCalendarControl.CalendarControl'
Oct 17, 2009How can I get round this error: Option Strict On disallows implicit conversions from
[Code]...
LINQ With Option Strict
May 26, 2012I'm facing a trick issue with LINQ. I generate the above code:[code..]
Everything is running well if I turn off Option Explicit. When I turn it on, compiler is showing me a meessage: Expression is of type 'Object', which is not a collection type. Referencing to lResult variable.
Option Strict On LINQ
Dec 28, 2011i'm encountering the following problem. I recently activated 'Option Strict On' and now I get an error in my LINQ query. From e As TEnum returns the following error: Option Strict On disallows implicit conversions from 'Object' to 'TEnum'. [code]
View 2 RepliesLINQ And Option Strict When Using Custom Object?
Aug 12, 2011http://127.0.0.1:47873/help/1-6644/ms.help?method=page&id=C318B79A-FA4D-4DE3-B62D-C1162BEB267E&product=VS&productVersion=100&topicVersion=100&locale=EN-US&topicLocale=EN-US
and i get the following error
[code].....
Linq Grouping With Anonymous Types And Option Strict
Apr 24, 2012I've got the below, where I'm grouping a collection by a propery, then wanting to access the properties of my group. Problem I have is with the anonymous typing. Because of option strict I have to give an explicit type but I can't work out what the type should be. The below doesn't compile because t.HeadAccountKey isn't a value (as t has a type of object). So either I need do some casting or my linq selector is wrong,
[Code]....
Use System.Linq Extension Method In Project With Option Strict ON?
Feb 2, 2011I'm using .NET 3.5 In my DataLayer class I have references of System.Core,System.Data.Linq, System.Data.DataSetExtensions. But I cantnot use this feature in Linq query if I have Option Strict ON:
[Code]...
Tools To Convert Option Strict Off Code Into Option Strict On?
Mar 28, 2010I have to take over a project written in vb.net, which contains more than 400k lines of code written in option strict off mode. I want to build it under option strict on first before I do anything else -- which maybe converting it into C#. I found there's thousands of lines of code raises compilation error, mostly are about implicit type casts. Is there any tool would help to make it compile under option strict on mode if I don't want to correct every single line manually? Because it's really painful to add CStr/CInt invocation into every line of Code myself.
View 3 RepliesOption Strict On - Error On All The ".Cells" Lines Saying Option Strict On Disallows Late Binding
Sep 7, 2010I turned Option Strict On and i get an error on all the ".Cells" lines saying option strict on disallows late binding.
a = 1
b = 3
c = 2
d = 1
With oSheet
[CODE]..................
Option Strict Is Off, Compile Fail With "Option Strict On"?
Apr 13, 2011I have inherited a VB.NET application that I need to compile so I can run dorkumentation on it. I first received "Option Strict On disallows implicit conversion from x to y" errors, so I turned off the Option Strict option in the Project file.
So why do I still fail with the same error message?
Set Option Explicit And Option Strict On A Project / Solution Level?
Feb 22, 2011I really like the coding speed that vb.net provides, but I don't like the possibility to forget to declare variable types, return types of functions, etc. and that is why in each class I use[code]..
Is there a way to define those two options on the project/solution level?
VS 2005 Option Explicit On; Option Strict On
Feb 24, 2010what does these two code means in vb.net: Option Explicit on Option strict on i think option explicit means the compiler is not going to do any kind of conversion and i need to do all of them by the code;also it becomes case sensitive i.e;
[Code]...
Use Of Option Strict And Option Infer
Feb 22, 20111. I have read that keeping Option strict on and Option infer off is good practice and will insure your code is tight and properly written. I would like input regarding this, pro's and con's from those who are in the know.
2. Having said that, I have set Option strict on and Option infer off in an existing program I wrote (that was working perfectly mind you) with them off and on respectively. I went through and cleaned up all the errors on the 'need AS' and casting of variables, but one is leaving me a bit put out.[code]
I have also read where using My.Computer.System.Directory.GetFiles() instead of System.IO.Directory.GetFiles() is probably not a good thing, but when I change to this I get no error, but also no dataI am thinking I should stay with the strict on and infer off but am really slogging through getting this code correct.Running Win7 on Dual Quad Core XEON Intel Extreme with 8Gb RAM.
How To Do This With Option Strict On
Nov 25, 2010Dim frm As mshtml.HTMLFormElement
Dim sel As mshtml.HTMLSelectElement
Dim hi As mshtml.IHTMLElementCollection
Dim inp As mshtml.HTMLInputElement
[code].....
Looks to me that childnodes object has a more specific type. But what? Not ihtmlcollection. The type support some item interface.
Option Strict - On Or Off?
Dec 7, 2009Title says it all really, should I have it off unless I'm having an error, or simply have it on all the time?
View 10 RepliesOption Strict On - Is Better?
Jun 28, 2010what do you thinkg about comment below? original article url is also suggested to read.I didnt get why my code will be faster if i use it on. anyone has good knowledge about it?
Although Visual Basic .NET allows you to perform implicit type conversions and late binding, you should avoid these practices. Implicit type conversions and late binding may lead to severe performance problems, runtime errors, code that is difficult to read and maintain,and sub-standard programming practices.Many VB.NET professional programmers believe that leaving OPTION STRICT OFF by default was perhaps Microsoft's worst decision in the VB.NET implementation. Use OPTION STRICT ON.
'option Strict On' Insists On This But Can't See Why?
Jan 25, 2012I have an old programme that was written with 'option strict off' I have been steadily working through it mainly sorting out casting issues but have come up against some that I dont understand.for instance I have a checkbox called tickbox
dim Tickbox as new checkbox
later in the code
dim blah as boolean = Me.Tickbox.CheckState
but option strict insists i cast it as a boolean
dim blah as boolean = CBool(Me.Tickbox.CheckState)
surely the checkbox.checkstate is Booleean?
.net - Use Use 'strict Off' Option In Projects?
Jun 30, 2009Do you use 'strict off' option, 'explicit off'? Or may be 'strict custom' and some other options like 'Implicit type. Object assumed', 'Late binding', 'Implicit conversion'?
View 8 RepliesC# - Set DataGridViewCell.Value With Option Strict On?
Oct 21, 2011How to test for DataGridViewCell.Value with Option Strict On?
If DataGridViewCell.Value = "some value" then
Gives the error:
Option Strict On disallows operands of type Object for operator '='. Use the 'Is' operator to test for object identity.
EDIT:
The Solution is:
If DataGridViewCell.Value.ToString = "some value" then
Option Strict And DataRow Value
Jun 14, 2011If a field called X in a datarow called R is an int32 and Y is an int32 how can I make this statement work:
r!x += y
with option strict on.
Error 8 Option Strict On prohibits operands of type Object for operator '+'.
Option Strict And DefaultValueAttribute?
Nov 24, 2010Having just spent the past several hours trying to work out why my Xml Serialization code was not working. Consider the following:
<DefaultValueAttribute(False)>
Public Property UserName() As String
Why is this allowed regardless of option strict being on (or not)?
Option Strict On By Default?
Mar 1, 2011Whenever I created a new VB.NET program I must go into project's proerties and set 'option strict' on. Can I do that once so it is a default for every time I create new project?
View 4 RepliesOption Strict Woes?
May 25, 2012I have a DataGridview in which one column is a checkbox. I use the following code to check/uncheck the box whenever the cell is clicked.
Private Sub dgUnscheduled_CellClick(sender As Object, e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dgUnscheduled.CellClick
If dgUnscheduled.CurrentRow.Cells(0).Value = True Then
[code].....
Why Have Errors When Option Strict Is On
Dec 29, 2009Option Strict Off
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim num1 As Integer = Integer.Parse(num1TextBox.Text)
[code]...
.net - Conversion With Union And Option Strict On?
May 20, 2011i have a Problem with UNION for LINQ to SQL I have my LINQ query
Dim dc As New ContainerDB.DataClassesDataContext()
Dim test = (From container In dc.GetTable(Of tbl_container)() Where container.pkContainerID = iPkContainerID).Union( _
From containerHist In dc.GetTable(Of tbl_containerHIST)() Where containerHist.pkContainerID = iPkContainerID)
[Code]...
Dynamin Compile & Option Strict Off?
Jan 11, 2011I have a section that compiles basic boolean expressions at runtime, such as:CustomerBirthDate > "1/1/1940"At runtime it works perfectly. The generated code file contains "Option Explicit Off" at the top and when I call compiler services, I pass the option /optionexplicit-
View 7 RepliesEquivalent For C# 'dynamic' With Option Strict On
May 22, 2010Is there an equivalent for the C# 4 'dynamic' keyword when using 'type safe VB.Net', i.e. with Option Strict On?
View 3 Replies