Inequality Comparison Operator In VB?
Dec 9, 2010In C I write an if statement like:
if (a != 0)
How do I write this != operator in VB?
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How To Use Operator As A Comparison Operator
Nov 11, 2009I want to perform equality comparison in VB.NET and cannot get it to work. Error: value of type Boolean can not be converted to System.Drawing.PointF
[code]...
Case (in) Sensitive Comparison With Operator In Runtime (without Option Compare)
Jun 24, 2011Is there anyway to use LIKE operator in VB.NET as case sensitive or insensitive during runtime? For example use a flag to do case sensitive or insensitive comparisons.Obviously this can be done by simple converting them into lower case and forcing application to Option Compare Binary but maybe there is a better way to do this?
View 1 RepliesComparison Error Operator "=" Is Not Defined For Types 'Byte' And 'Char' While Converting C#
Jan 21, 2011I am in the process of converting some c# code to that of VB.NET...I am running into error at the following
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Error: Option Strict On Disallows Operands Of Type Object For Operator '='. Use The 'Is' Operator To Test For Object Identity
Jan 27, 2010I am tightening up my coding with the Option Strict set to ON. It has now produced alot of errors. An example of this is:
If AllocatedDGV.Rows(i).Cells("RoomNumber").Value = RoomsAvailableDGV.Rows(j).Cells("RoomName").Value Then
It gives me the following error: Option Strict On disallows operands of type Object for operator '='. Use the 'Is' operator to test for object identity.
Option Strict On Disallows Operands Of Type Object For Operator Use The 'Is' Operator To Test For Object Identity
Apr 6, 2012I need to write an interface to get data to/from our data files.
We have a low level class that holds field values for each record read from the files.
This just holds two values, the value read from the file (DBValue) and the updated value that may need to be written back to the file (CurrentValue).
These values may be any of the standard value types (integer, date etc) or a string.
Either value (DBValue or CurrentValue) may be null if not defined.
I have written the class to manage this data which works fine while option strict is NOT on.
But we have an office policy of having option strict on all the time.
When I put option strict on, my object value comparisons fail with the error: "Option Strict On disallows operands of type Object for operator '='. Use the 'Is' operator to test for object identity."
Question, how should I change the following code to handle option strict on ...
This is all running on Visual Studio 2010
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Coalesce Operator And Conditional Operator In .NET?
Mar 10, 2009Possible Duplicate: Is there a conditional ternary operator in VB.NET?
Can we use Coalesce operator(??) and conditional ternary operator(:) in VB.NET as in C#?
Bitwise Comparison
Dec 30, 2010result = SendMessage(buttonhandle, BM_GETSTATE, 0, 0)
buttonChecked = (result = BST_CHECKED)
Now I want to know whether the bit for BST_CHECKED is turned on or not.
How would I do that?
I can do
buttonChecked = (result % 2 = BST_CHECKED)
Is there a better way?
C# - String Comparison In .NET?
Feb 17, 2012What is the difference (in bref) between (.NET)
myString == otherString
and
myString.CopareTo(otherString) == 0
Comparison Of VB And C# Communities?
Jan 19, 2010read this post carfully before you dive headlong into outlining what's wrong/right with the communities.
View 3 RepliesC# - Comparison Of Serializing Methods?
Dec 25, 2011Possible Duplicate: Fastest serializer and deserializer with lowest memory footprint in C#?
I'm using BinaryFormatter class to serialize an structure or a class. (after serialization, I'm going to encrypt the serialized file before saving. (And of course decrypt it before deserialization))But I heard that some other serialization classes are present in .Net Framework. Like XmlSerializer, JavaScriptSerializer, DataContractSerializer and protobuf-net.I want to know, which one is best for me?Less RAM space needed for serialize/deserialize is the most important thing for me. Also speed is important.
Comparison Syntax Between Two Datatables?
Mar 23, 2009I am trying to compare two datatables and generate a resultant datatable of rows that do not match based on customer number. The main table "Customers" contains all customers that have been placed in our system. I am trying to generate a table of customers, "dtResults," that we have not ever generated an invoice from a table called "CurrentCust".I would like someone to look at the attached code and see how I can handle the 'InvalidCastException was unhandled', 'Unable to cast object of type 'System.String' to type 'CustomerDataTable' error. Error occurs at line 43.
1
Option Explicit On
2
Option Strict Off
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Convert Vb Date Comparison To C#
Aug 24, 2011I have a code in vb, and I'm trying convert it to c#.
_nextContactDate.ToShortDateString > New Date(1900, 1, 1)
This is _nexContractDate declaration:
Private _nextContactDate As DateTime
Comapre datetime to string?
Datetimepicker Time Value Comparison?
Aug 7, 2011im trying to compare time value of to two datetimepickers, i tried to use dt_Start.Value.TimeOfDay > dt_End.Value.TimeOfDay but it doesn't work. btw, i trying to make a scheduler. here are some of my codes:
Dim strUpdate As String
If dt_Start.Value.Date > dt_End.Value.Date Then
MsgBox("End date is earlier than Start Date. Please check.", vbExclamation, "Error!")
ElseIf dt_Start.Value.Date < Today.Date Then
[Code]...
IsNot For String Comparison
Oct 12, 2010If Object.Value IsNot "Something" Then Can you do this, or are there certain cases in which it wouldn't work? Wasn't sure if this should only be used for integers and booleans.
View 3 RepliesMake Comparison Between Pictures?
Oct 16, 2010What code should I use to compare two pictures?
I tried those:
If PictureBox1.Image <> PictureBox2.Image then
End If
'and I tried this too:
If PictureBox1.image IsNot PictureBox2.Image then
End If
'But that all did nothing
Use Or In Comparison Between File Attributes?
Feb 3, 2012I have searched a lot on the web about changing file attributes in .net , it takes me a long time to get the final code but it was really good. But after all of my search I didn't know why we use "And" when we compare file attribute like this:
If (System.IO.File.GetAttributes(FilePath_txt.Text) And System.IO.FileAttributes.Hidden) = System.IO.FileAttributes.Hidden Then
MsgBox("File is hidden")
Else
MsgBox("File isn't hidden")
End If
Otherwise when I want to set Multiple attributes for on file I have to use "Or" with it like this
System.IO.File.SetAttributes(FilePath_txt.Text, IO.FileAttributes.System Or IO.FileAttributes.Hidden Or IO.FileAttributes.ReadOnly)I know this isn't a big problem but , I can't write a code I don't know how it is actually works.
Webcam-Images-Comparison?
Jul 14, 2009I want somehow to temporarily store and compare two images capture from my web cam every 5 sec. (basically i`m going to use this as motion detection)I figure out how to perform pixel to pixel comparison but the problem is how can i store the images temporarily every 5 sec?Do i need an array?Can i avoid saving the images for the motion detection?Also is it better to convert the images into gray scale or black & white for the comparison or as they are
View 5 RepliesComparison Between Cell And Parameter Value - DataType
Sep 26, 2010I want to compare between the cell value with the value (parameter) in database. As example, if my cellvalue value is 3 and my paramater(a) in my database is 5 it will be like this
if cellvalue<a then
(some code)
end if
I don't know the exact data type. The reason I need to use data type is because my data is dynamic.
Here is my
protected SubGridView1_RowDataBound(ByVal Sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GridView1.RowDataBound
con = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;DataSource=C:UsersmeDocumentsVisual Studio 2005WebSitesCSGCSG1.mdb")
con.Open()
[Code] ......
Comparison To A File On A Different Computer On The Same Network
Jan 4, 2012I have a computer that takes in a barcode through a Visual Basic program on one computer and I want to be able to compare that barcode as a String to data on a different computer on the same network by ethernet connection where the data is stored in an Excel 2010 file (.xlsm) in Column A in a workbook called 'Data.xlsm'. Before the data is allowed to be saved or used further in the program on the first computer, I would like for the comparison to happen.
Some more details that you all may or may not need.
Computer 1 (where barcode is scanned): Windows 7, Office 2010
Computer 2 (where data file is stored): Windows XP, Office 2007
Convert Images To Values For Comparison?
Nov 26, 2011I am making a Texas hold'em poker game for my class project. I already have the cards in the game through an image list. I am now trying to compare the player cards with the flop, turn, and river card to tell the player what they have and if they have won or not. I have tried a number of different things but have come up short. This is the last thing I tried[code]...
View 6 RepliesDictionary Class And ContainsKey Comparison?
Mar 26, 2009When using the Dictionary class when the key and value types are your own custom types, is it possible to specify the property of the key type object to use with the ContainsKey method? Best described with an example:
Dim dict as New Dictionary(Of CutsomType, AnotheCustomType)
Dim obj1 as CustomType ' Custom type with 3 properties ID, LastName and FirstName
Dim obj2 as AnotherCustomType
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I could just omit the lines with ContainsKey but I'd prefer to know how it's making the comparison and how to change it if required. I don't want to use an integer containing the ID for the key type because I want to reference the whole object later on again.
Excelsheet Comparison - Put All The Cells That Are Different In A New File
Apr 14, 2011i have 2 excel sheets (file1.xls, file2.xls), both with 2 columns. the first column of both files contain keywords, (both files have the same). now i want to write code in excel that compares the 2 files and put all the cells that are different in a new file (file3.xls). i already saw an example here on the site, Excel sheet values comparison, but somehow it doesn't fit for what i need, and i don't get it to work.
View 7 RepliesInteger Nearest Match Comparison
Jan 25, 2009i'm building an image library and one of the things i want to do is compare the most common color in a given image to a set of established colors in rgb format the way i'll probably do this is create 3 arrays for the average r,g and b of each given image, and then compare them to my established values for r,g and b that i want to match to so if my first image has the average values of 255, 125 and 5 for r,g and b..what would be the best way to do a nearest match against my pre-established colors? (about 32 in total)
View 1 RepliesLarge Files For Data Comparison?
Sep 21, 2010I am working on a program for a customer and am working in VB2010 in VB language. I have two rather large files that contain data. File #1 is over 300,000 lines of data. File #2 is over 100,000 lines. The files are CSV text files. On a User Form, there are two values, "StartTime" and "StopTime". This is the process I am doing:
1. Read both files into ArrayLists
2. Get item #1 of ArrayList #1 (we'll call this "A")
3. Get item #1 of ArrayList #2 (we'll call this "B")
[code]....
Objects Property Value Comparison Does Not Check For Nothing
Dec 9, 2011I am using Entity Framwork and have an Entity Customer with a property of[code]...
However I noticed that this code does not get executed when Customer.CustomerStatus Is Nothing.
Simple Checked List Box Comparison
Jul 27, 2009I have a form containing a checkedlistbox, I want to be able to do a simple comparison between the checked status before and after to see if there has been any change. I have a copy of the "before" version of the checkedlist box and I thought I could just compare the two CheckedItems but it always thinks they are different, I could iterate through the entire checkedlistbox but I thought there would be an easier way.
[Code]
VS 2008 Efficiency Comparison Of Nested Ifs?
Jul 20, 2010which is more efficient?(Assume case statements, etc., cannot be used.)
If a Then
If x Then
ax()
ElseIf y Then
[code]....
VS 2008 String Comparison Methods
Apr 27, 2009currently I am using something like the following:[code]It seems to work fine, but I've seen posts on different blogs and stuff that say string.compare is better for some reason.Is this ok to use or should I be using string.compare()?
View 3 RepliesVS 2010 - Comparison Of Dates When Value Is DBNULL?
Aug 1, 2011I am trying to do a comparison between a date in my db and a date in a textbox.I am using the following
CDate(Me.txtVrijeDatum01.Text).Date <> CDate(reader("VrijDatumVeld01")).Date
It works pretty well except when the textbox is empty or the value in the db is NULL.