Many times i was not getting correct output,then i put .tostring() at the end then it gave good output.so basically why do v need this?also Convert.ToInt32(cmd.ExecuteScalar()) why convert to int32?
View 1 RepliesWhatd does following code do in VB?
Convert.ToInt32(rmaValidationCode.ToCharArray().GetValue(0), 16) Mod 2) = 1
note :Private rmaValidationCode As String
C#: Difference between int.Parse( ) & Convert.ToInt32( ) ?And Which one we have to use on what cases--
View 15 Repliesi need some help on explaining to me whats going on in the code below. Basically, the code below is used to convert a bitmap image to grayscale level (black and white).
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim pic As Bitmap
pic = picVisible.Image
Dim X As Integer
[code].....
what i dont understand is the part;
color = (CInt(pic.GetPixel(X, Y).R) + pic.GetPixel(X, Y).G + pic.GetPixel(X, Y).B) / 3
why is it that the Cint() is only used for pic.GetPixel(X,Y).R) and not for the others ? Any Image processing expert that can help explain this ?
Note: The code works well and manages to convert an image into its grayscale.
I must not be using the proper search terms.
Convert.ToInt32 obviously is a 32 Bit Integer
Convert.ToInt16 obviously is a 16 Bit Integer
So what Size does the CInt convert to?
1. What's the difference between ToString and ToString()? (i do know that ToString method is to cast numeric values to string but don't know how to get it to work)
2. Why do i need XML comment feature? is it necessary?
I'm quite a newbie in VB.NET (and VB on the whole). So my question could sound rather odd, but still. I've stumbled upon an issue with the CInt and converting a double to an integer.
The issue is the following: CInt(10.5) would be 10
CInt(10.51) would be 11, but I expected 10... (Got used to C# style conversion: (int)10.51 would be 10)
As pointed out here Integer.Parse VS. CInt the result is just rounded in some fashion. Nowever, all I need is to get only integer part and throw away the fractional one. How can I achieve such type of conversion in VB.NET? After a short research I assume that I can use Fix() funciton to do the trick, but is it the best choice ever?
I have a strange problem where CInt (as well as Convert.ToInt32 or even Val) return -1 for a string "500". Using Gurock's SmartInspect for logging, I've checked all values at runtime (SiAuto... logs something, I'm posting the log below the code).
[Code]...
The function "Convert.ToInt32" returns my an integer increased by 48. My operating system is Windows Vista with 32 bit.Here a code, where the bug will be called:
Module Main
Sub Read(ByVal Text As String, ByRef Value As Integer)
Console.Write(Text)
[code]....
I have build a DLL with COM enabled. In this DLL I have classes that did use the functions CInt, CDec and IsNumeric. If I test these classes from a .NET application then it works ok. But when I called/run these classes from a Win32 application (with COM) then I did get an "E_UNEXPECTED(0x8000FFFF)" error.After some debugging I found out that the problem would go away if I:- replaced IsNumeric with Integer.TryParse or Decimal.TryParse- replaced CInt with Integer.Parse- replaced CDec with Decimal.Parsey.
View 2 Replies[Code]...
I get an error on "colorNumber" in the line/ colorNumber = Convert.ToInt32(TextBox1.Text) It says expression is a value and can't be target of statement. What does that mean? Then how can I change the target?
I have no idea how to do this, but I want to create a [I dont know what it is called] to allow me to convert a class property to another type.The I could use the following w/ the new type:
Dim stringPhoneNo as String = "(111)111-1111" Dim typePhoneNo as PhoneNumber = stringPhoneNo.ToPhoneNumber()
When a custom class overrides the ToString() method, the C# IDE uses this function to display the class in the debug mode(tooltips, watcher etc) Does the VB.NET the same? I have impression that overriding ToString() method does change nothing. I mean, in the watcher I see Name myBusinessObjectInsnace Value {MyNamespace.myBusinessObjectInsnaceType}
View 4 RepliesIf you try to compile the query below in Visual Basic .NET, it fails. From x In {1, 2} Select x.ToString() The error given by the compiler is: Range variable name cannot match the name of a member of the 'Object' class. There is nothing wrong with the equivalent C# query, though: from x in new[]{1, 2} select x.ToString()
This does not happen with the ToString overload that takes a format (it is a member of Int32, not Object). It does happen with other members of Object, as long as they don't take an argument: with GetType and GetHashCode it fails; with Equals(object) it compiles.
My problem is that I'm trying to parse a String to a System.Drawing.Color. Im trying to set up a simple notepad, here's part of my code:
Private Sub ToolStripMenuItem6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Colorfuente2.Click
Try
Dim cdlg As New ColorDialog[code].....
I've googled like crazy and tried MSDN but I can't get a clear answer what to use ToString for.
View 11 RepliesI just converted a VB.net solution into C# solution. But lots of variables have been coverted like:
string var1 = (string)1;
string var2 = (string)intVar; //intVar is a int value
I just want to convert all (string)XXXX to XXXX.ToString() by using some Regular expressions or some other replace methods.
I know that i use a "c" for American Currency is there a ToString value used for Mexican Pesos?
View 2 RepliesConverting an object .tostring() removes the leading zeros. The object is not a fixed length, so I can't do object.tostring("0000000") where the number of zeros represents the fixed length.
An example object value is "0357" when I convert that object .tostring it becomes "357".
Is there a method for keeping the leading zeros where the length is not known?
Possible Duplicate: C#: why does the string type have a .ToString() method?Why is there a ToString method exist in String class (VB.NET)?
String.ToString()
Will it be a overhead if it is used like
TextBox.Text.ToString()
I just want to know, what exactly the difference between the functions CStr() and Str() and also the .ToString()? With the code provided below, what's the difference between the three?
[Code]...
If we make a class and implement tostring, should we support some interface?
View 5 Replieswhy is it that in the properties i have set version to 1.2 as a decimal but when i call
MsgBox(My.Settings.version.ToString)
i get shown "1"
VB.NET 2008. How could I make a new line inside the ToString() Function that VB already have. How to do like a .WriteLine() but inside the ToString() function. In my case, this inside of a class of course. I don't know if you get me. All I want to do is to show a fraction in the normal way not using the slash(/). Showing the numerator on top of a line, and below it the denominator. This inside the VB pre-made ToString() function.
This is what I've tried;
Public Overrides Function ToString() As String
Return Me.numerator & "/" & Me.denominator
End Function
Output example: 2/3
But this is not what I want.
When I am concatenating object values together to form a string in VB.NET, is there a difference in performance or a recommended best practice between using the & concat or the + concat with calls to .ToString() on each object?
Example (which is faster or best practice):
Dim result1 As String = 10 & "em"
Dim result2 As String = 10.ToString() + "em"
I've been programming in vb.net a lot for the last 9 weeks and I have just come across a lot of double functionalities (hope I used the right word for that).For instance, you can use CInt, CType, Directcast or Convert to turn something into a integer. (Directcast doesn't really belong in that line but whatever).
With calling methods you can do DoWork() or call DoWork()With returning values in functions you can do DoWork() = 3 or return 3 Why is this? Is it just to make the transition frm vb6 to vb.net easier? Or about giving the programmar a lot of options. I must admit I don't really like to have that choice, I am always in doubt whether I am using the right method .
Is the default format of ToString dependent on anything server related? Here's the issue: I'm testing and have tested an application on my local machine and ToString(), by default, is returning in a format of "MM/dd/yyyy hh:mm:ss tt", however on our server it appears to be returning as "dd/MM/yyyy hh:mm:ss tt" which the consuming application is not expecting and causing errors.
Dim uvExpireDate = DateTime.Now.AddMinutes(1)
Dim token = String.Format(fmtString, uvExpireDate.ToUniversalTime().ToString(), [various other params])
I have a custom business object which overloads the .ToString() function. It also implements IFormattable.ToString, so I can define my own custom formats.This approach seems to work everywhere in my app, except .rdlc reports. For example, I have a text field on a report with the following expression:
=Fields!MyField.Value.ToString("lr")
"lr" is a custom format I have created. When running the report I always get #Error as the output. I've placed breakpoints in my .ToString function and stepped through the code as the report is running, and I know the function is returning the correct value, but the report just doesn't seem to be capable of receiving and displaying it.
I have a collection similar to:
Public Class MyCollection
Inherits ObservableCollection(Of MyCollection)
Private _Name As String
[code]....
EDIT: I know that I can use DebuggerDisplay, but unfortunately it is very limited. The class in reality is quite complex and I need to have the possibility to define a logic in what I show during debugging, if possible.
Why does: DateTime.Now.ToString("M") not return the month number? Instead it returns the full month name with the day on it. Apparently, this is because "M" is also a standard code for the MonthDayPattern. I don't want this...I want to get the month number using "M". Is there a way to turn this off?
View 6 Replies