Looking For .NET Math Method That Will Zero A Negative Integer?

Mar 24, 2010

Similar in concept to Math.Abs() - I'm looking for a function that when given a positive integer will return the same integer. If given a negative, will return zero.

So:
f(3) = 3
f(0) = 0
f(-3) = 0

Yes, this is simple enough to write on my own but I'm wondering if the .NET Math class already has this built in or if the same can be achieved by cleverly chaining a few Math.* calls?

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C# - Finding A .NET Math Method That Will Zero A Negative Integer?

Oct 3, 2010

Similar in concept to Math.Abs() - I'm looking for a function that when given a positive integer will return the same integer. If given a negative, will return zero.So:

f(3) = 3
f(0) = 0
f(-3) = 0

Yes, this is simple enough to write on my own but I'm wondering if the .NET Math class already has this built in or if the same can be achieved by cleverly chaining a few Math.* calls?

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Convert Positive And Negative Math.Sin (waveform Output Values) Into (unsigned) Byte Array?

Apr 19, 2011

I'm creating an emulator for a device to simulate wave forms. My challenge is that when I try to convert the output of the following code, I can't convert the Math.Sin's double output into byte values that lend themselves to the byte array format required by an existing graphing control as listed at bottom below. I''m not sure how to handle this when the sin function creates negative values but the byte values will need to be positive and basically 'shifted up' so that anything over 127 is negative. (0 - 255) unsigned. BitConverter.GetBytes has been suggested but THIS is the result of that attempt.

[Code]....

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Send Negative Integer (hex) To Plc?

Feb 22, 2012

I am using delta plc. i want to send +1 to +30 & -1 to -30 numbers in 4 byte hex format(xxxx) in vb.net.

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Test An Integer Value To See When It Is Positive / Negative?

Sep 18, 2009

I am looking for a way to test an integer value to see if it is positive or negative so I can perform the required actions.

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Auto-Increment Textbox Gives Negative Integer In Application?

Apr 11, 2010

I have a visual basic .net application. It has a sql server database and a dataset for it. I have created an interface to the database (passing through my dataset) to add, delete, save etc records in a table.

The ID entry has identity specification:Yes and increment seed 1 When I add a record, instead of giving 1,2,3... as id in the textbox it produces -1,-2,-3 (Negative integers)

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VS 2008 : Re-index Variables To Non-negative Integer Values?

Oct 19, 2010

I have a program that calculates values of a function, say f, with respect to another variable, say L.I have an array of f(L), for L going from 0 to a given integer value, say t-1 in steps of a value i.I need to export the values of this function to an Excel spreadsheet in a given column, and to do this, I would like to re-index the function f, since i is much less than one, and so the following loop I use (see below) won't work:

For L = 0 To t - 1 Step i
Sheet.Cells(L, 1) = L
Sheet.Cells(L + 1, 2) = f(L)
Next L

The first code in the loop will essentially load the values of L itself, at which the function is defined and calculated, and the next line will load the values of the function at each value of L.Since the indexes of the row and columns in an excel spreadsheet only go in steps of 1, I need to convert the indexes of the function, or the indexes to which L is loaded, so that it would be scaled so that the first entry corresponds to L=0, but the next is L=i, but loaded into row number 2, etc.

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VS 2010 Hmwk - Display The Largest And Smallest Using Math.max - Math.min

Mar 5, 2012

well i am having a couple of issues with this particular homework problem and this is my first programming class so there is probably quite a few mistakes well the homework problem is to take three double values entered by a user and display the largest and smallest using math.max and math.min and display the smallest and largest so i thought i could use a listbox and take the values that went to the listbox and assign variables to each so i can try to use each variable in the math.max and min but im not making it to far and i actually might be way off

[Code]...

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TimeSpan Subtract Method Return Negative TImeSpan?

Dec 9, 2009

These two TimeSpan are stored in the Database with 24hr format. No date, only TimeSpan.

Dim r As TimeSpan
Dim tsStart As TimeSpan
Dim tsEnd As TimeSpan

[Code]...

Is there any TimeSpan method to get this right?

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Overload The Method To Allow Strings Instead Of Integer

Jul 2, 2011

I am working on this project and I am suppose to overload the method to allow strings instead of integer. Allow the user optionally add a thried string from a third text box. Okey I am trying to under stand this good. This is the code I have:

This is my overload class

Public Class OverloadEx

[CODE]........................

So with my overload class instead of integer I should put string there? If the user clicks the add button it will allow the user to add all 3 text boxes but when the user click the add string it will allow the user to add all three text boxes to string. So do I click the add string button to overload it to that one just like I did with the add?

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Assign The Value Of The Integer Returned From The InStr Method To A Variable

Jul 21, 2009

I want to assign the value of the integer returned from the InStr method to a variable. So, If TextBox2.Text = "The Apple Pie" And TextBox1.Text = "App", I want the integer returned, which in this case would be 5, put into a variable, lets say its called 'VarString'.
So VarString (would) = 5.

[Code]...

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C# - Pass An Integer As A String Parameter To A Method Without Calling .ToString()?

Mar 12, 2010

In VB.NET, it is entirely possible to pass an integer as a string parameter to a method without calling .ToString() - it's even possible to call .ToString without the ()'s. The code will run without a problem, VB will interpret the integer as a string without having been told to. In C#, these would cause compilation errors - you are required to call .ToString() and to call it correctly in that situation before it will compile. Is there a way to make the VB compilation process check for the same things as the C# compilation process? Would it be best practice in a mixed team to force this check?

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VB 2008 TryParse Method - When Enter A Character The Result Is As Though I've Entered An Integer

Mar 10, 2009

The code performs correctly when the input is an integer, but when I enter a character, the result is as though I've entered an integer. Can you tell me what's wrong with my TryParse statement?

Private Sub btnCompare_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnCompare.Click

' Declare Local Variables

[CODE]...

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VS 2008 Dictionary(Of Integer "Method")?

Aug 6, 2010

I have a large number of methods and I need to call one of them, based on some integer. Of course I could just use a Select Case statement like so

[Code]...

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Strongly-typed Generic Method Invokes Its Argument's Base Class Method Instead Of A Shadowed Method In T?

Oct 19, 2010

Consider a MyForm class that contains a shadowed implementation of Show(). It also contains a CreateForm() method, which accepts an instance of the form and calls the shadowed sub:

[Code]....

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Get This Message : Operator '+' Is Not Defined For Types 'integer' And '1-dimensional Array Of Integer'?

Sep 25, 2010

ive got some simple problem i cant understand how to solve.

str(1) is an array and integer(or double, tried both)
a(1) is an array and integer (or double, tried both)
a(1) = a(1) + 1
Label1.Text = str(1) + a

the big part is where i get: operator '+' is not defined for types 'integer' and '1-dimensional array of integer'.why do i get that message and what does it mean? how do i make the code do what i want?

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Error : 'AddressOf' Expression Cannot Be Converted To 'Integer' Because 'Integer' Is Not A Delegate Type?

Aug 11, 2011

I faced an error when upgrading VB6 code to VB.NET. The error occurs at AddressOf WindowProc

AddressOf expression cannot be converted to 'Integer' because 'Integer' is not a delegate type

My declaration for SetWindowLong is:

Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA"(
ByVal hWnd As Integer,
ByVal nIndex As Integer,[code]....

What is the reason for the error I get?

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Error After Implicit Conversion Of 1 Dimensional Array Of Integer To IEnumerable Of Integer() ) ?

Apr 25, 2011

I'm trying to create a linked list of an array of integers. Why is the following implicit conversion required?

When I run the code that contains that conversion, I get the following error.

As a real-time data acquisition user control data (a packet of an array of bytes) arrives every second, is converted into an integer array and inserted into a linked list.

The most recently arrived data is painted as coordinates on a grid at the right of a PictureBox using Graphics.DrawLine (pen,X1,Y1,X2,Y2).

The oldest data (arriving 120 seconds ago) will be drawn at the leftmost portion of the Picturebox.

Why a linked list rather than a list? To display 120 views of time sequence data, the draw routine the most recently inserted node to a node that points to Nothing. How do I limit the length of the linked list to 120 nodes and always ensure that the last node points to Nothing?

Do While Not item Is Nothing
item = item.NextItem
Loop

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'AddressOf' Expression Cannot Be Converted To 'Integer' Because 'Integer' Is Not A Delegate Type

Aug 3, 2009

I am a newbie in VB and I got a piece of code which can display the current running program. I need to use that in VB2005 and I got the below error message. Can anyone help how to fix it?[code]

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'AddressOf' Expression Cannot Be Converted To 'integer' Because Integer Is Not A Delegate Type

May 13, 2009

I'm trying to convert a VB6 project to .NET, but I get problems with some callback functions, and the following message comes up: "AddressOf' expression cannot be converted to 'integer' because integer is not a delegate type" I've seen several solutions to similar problems like this, but I am not able to understand this issue with delegates.

After the conversion, the code look like this:

Declare Function vsmsgwSetDataPackageCB Lib "vsmsgwW.dll" (ByVal PACKAGE As Integer, ByRef arg As Integer) As Integer
Dim arginitP As Integer

[Code]...

Which gives the error: Method 'Public Function PackageCB(HisNodeID As Integer, ByRef data() As Byte, ByVal length As Integer, ByRef arg As Integer) As Integer' does not have the same signature as delegate 'Delegate Function DelegatePackageCallback(hwnd As Integer, lparam As Integer) As Integer

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Asp.net - LINQ - Putting Result In A Dictionary(Of String, Integer), Where The Integer Must Be 0?

Sep 19, 2011

I have a LINQ2Entity problem, I want to get the value, string, from a database, so I select FProducts.Serial_number, and to end the query, I do .ToDictionary. The problem is, it tells me that it doesn't have sufficient parameters, to convert ToDictionary. So I need something like select FProducts.Serial_number, Nothing). ToDictionary. Also FProducts.Serial_number, 0).ToDictionary doesn't work.

Sub GetStatistics(ByVal ProductNumbers As List(Of String), ByRef Passed As Integer, ByRef FailedProducts As List(Of String))
Passed = 0
FailedProducts = Nothing

[Code]...

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Operator '>=' Is Not Defined For Types '1-dimensional Array Of Integer' And 'Integer'

May 9, 2012

this is for a BINGO game final project that I already turned in but this just bugged me that I could not get the sorting figured out. I am trying to get this to sort the random numbers in to columns under the correct letters but I keep getting the error Operator '>=' is not defined for types '1-dimensional array of Integer' and 'Integer' under the line:

[Code]...

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Value Of Type 'System.Linq.IQueryable(Of Integer)' Cannot Be Converted To Integer?

Aug 11, 2011

I am new to EF Linq and I have been struggling with this query for a few days. From reading this forum, I have managed to get this far:

Dim noPic = (From f In myEntities.FriendLists
Where (f.UserID = Profile.ID)
Select f.FriendID).Except(From g In myEntities.GuestLists
Where g.EventID = _id
Select g.FriendID)

[Code]...

I am trying to get everybody from the FriendList who is not already on the GuestList to display in a Repeater control. After reading the forum I was able to append .First() to noPic at the myNoPic declaration and finally get a result but that only gave me the first element. Does anybody have any advice on how to accomplish this?

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Why Doesn't CDate(integer) Work Where Integer Has Format Of YYYYMMDD

Mar 14, 2012

Why doesn't CDate(integer) work where integer has format of YYYYMMDD ?and why won't this stupid site let me submit such a short question when I have nothing else to add except some waffle at the end

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ComboBox.SelectedValue.ToString ("yyyyMMdd") Method Fails: Conversion From String "yyyyMMdd" To Type Integer Is Not Valid

Jan 26, 2011

am trying to get the following code to work:

Dim testString As String
testString = cbbxStartDt.SelectedValue.ToString("yyyyMMdd")

when doing so the code is being stoped and I get "InvalidCastException" error emssage:

Conversion from string "yyyyMMdd" to type 'Integer' is not valid.

If I do the following, then it works:

Dim testDate As Date
Dim testString As String
testDate = cbbxStartDt.SelectedValue
testString = testDate.ToString("yyyyMMdd")

This, returns the desired value: "20110103"

NB:

cbbxStartDt.SelectedValue.ToString returns: "03/01/2011 00:00:00"

So would it be possible that the problem comes from of the "time bit" : "00:00:00"?if, so is it the parsetime function which would allow to take into account only the time bit value of the combobox?

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.net - Operator '=' Is Not Defined For Types 'Integer' And 'IQueryable(Of Integer)'

Aug 3, 2010

This is giving me a headache. I have this link query here that grabs an ID

Dim mclassID = From x In db.SchoolClasses Where x.VisitDateID = _visitdateID Select x.ClassID And then later on I have this linq query

ViewData("Staff") = From t In db.Staffs Where t.ClassID = mclassID Select t

I've tried quite a few things but to no avail. I've attempted casting, converting, Is operand, etc.

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.net - Comparing Integer And Integer Results In Boolean?

May 28, 2009

I'm just writing a bit of code to compare an id of integer with an id of integer? for example:

Dim id As Integer = 1
Dim nullId As Integer? = Nothing
Dim areEqual As Boolean
areEqual = nullId = id

When I try to compile the code I get a compiler error: Option Strict On disallows implicit conversions from 'Boolean?' to 'Boolean'. Whilst it's very simple for me to work around this, I was hoping that someone might be able to explain what's going in the compiler to give this warning.

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String With Multiple Integer Values To Integer?

Apr 5, 2009

I'm trying to set an Integer value from my.settings.The values comes frpm a listbox, and then inserted to settings (set to specialized.StringCollection)The problem is when i'm trying to get the values and apply them to my function.Error code: Conversion from string "65 & 71" to type 'Integer' is not valid.To me it looks right, but maybe i'm missing something.

Code: Dim test2 As Integer Dim test As System.Windows.Forms.Keysm trigglist As New StringBuilderor Each item As String In

[code].....

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Negative Zero In VB?

Oct 22, 2010

In C# we can declare a decimal number as negative zero i.e usingDecimal x = -0.0M we can define a variable x which holds value i.e negative zero. +ve zero can be differentiated from -ve zero using Decimal.GetBits method and looking at its MSB

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SQL SUM Negative Value Not Being Returned

Jul 21, 2011

I have an SQL Query that looks like this [code]I get two results. The first is the correct one which is -0.0060 and the second @return_value which is 0.This is also the case when I call the stored procedure from my code, I get a 0 back instead of the -0.0060 that I want. This is how I am calling the stored procedure from my code:[code]

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