Long Variables Defined As Hex Values?
Sep 12, 2009
I have a VS 2008 C# application that I'm converting to VB 2008.
This statement in C# works as I expected:
IPAddress IPAddr = new IPAddress(0xFFFFFF0A);
IPAddr has a value of 10.255.255.255.
However, in VB this fails:
Dim IPAddr As New IPAddress(&HFFFFFF0A)
with invalid argument (the parameter of IPAddress should have type Long).This also fails:
Dim Addr as Long=&HFFFFFF0A
Dim IPAddr As New IPAddress(Addr)[code]....
does not produce a value of 4294967050, but -246. It appears to have defined a .net type of Int32, not Int64.How do I declare an Int64 variable in VB using a hex constant?
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Apr 11, 2010
Where X is a variable with a character stored in it. Works: If X = " " Then Valid = False Doesn't work If X = not " " Then Valid = False So what is the correct syntax? For the second one I get operator '=' is not defined for types Char and Long.
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Sep 28, 2009
If I want to narrow scope of a variable in C#, I can introduce additional braces - i.e.:
class Program
{
static void Main(string[] args)[code].....
In the ide, I can no longer reference y outside of the scope introduced by the new braces. I would have thought that this would mean that the variable y would be available for garbage collection.(it is interesting to note that when viewing the compiled code using reflector it appears that there is no difference with or without the additional braces)Is there any way similar to this to narrow scope when using VB.net? Does this have any impact on when variables defined in the inner scope may be garbage collected?
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Jun 13, 2012
That question sounds maybe a little confusing so I'll try to explain it with an example.[code]...
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Jun 23, 2011
My code below will save records to my database as long as all the parameter have values. One of the parameter is @MI (middle initial), however, there are times that student have no middle initial so when I click my button I get error. I want to still save the record even if one of the parameter value is missing.
[code]...
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Mar 22, 2009
I've declared a class called WindowIDNamePair in which I associate the hwnd of a window with the window's text. (See end of this post)
I've declared an array of type WindowIDNamePair as follows:
Private windowList(0 To 500) As WindowIDNamePair To test the array and class I'm doing the following:
windowList(0) = New WindowIDNamePair(1, "a")
windowList(1) = New WindowIDNamePair(2, "b")
windowList(2) = New WindowIDNamePair(3, "c")
[Code]....
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May 15, 2011
I'm using a Datagridview to fetch information from an XML. Each row contains a separate entry. I can read from and append to the XML database, but I want to:
A) Be able to save any edits made in the database to an XML file.
B) Store and fetch a collection of possible variables to populate a list box.
A should be relatively easy, but I don't know if B is. The XML database will contain hex values that can be written to predefined offsets, and each could be any number of bytes long. So one entry in the XML/Datagridview database could read "00,0A,0B,0C", where commas separate available write values, with each possible value being another line in a listbox. When a value is picked from the listbox it will be written to the XML.
I don't want to have to make <ListBoxValue1>, <ListBoxValue1> in the XML for each possible entry, so I'm hoping there's a more efficient way.
If you're interested in what I'm making, it's a hex editor that loads descriptions of offsets from an XML, then loads the values for each offset from a file. Here's a screenshot.
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Sep 18, 2011
Is there a easer way of coding in stead of wrighting long long paragraphs like this in one line [code]All of this is on one line and i got lots of info to put down.."The game will begin on your 16th birthday with your mother waking you up. Today you are to go to the castle for the first time. Leave your bed and open your dresser for a Strength Seed. "
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Feb 21, 2010
I would I have a program that I use in the computer in my network, but for every user I need to edit the source to this user, thus the user cannot edit his information, just use the program how it was ... So, looking over the internet I found a "program" that may contains my solution... Its a Keylloger, I'm not meaning use this keylogger, no, but it has a a very interest feature: I use the main form to edit the information then after all it create a new program with the new information inside... I use my main program to create every userprofile then my program create a new program with the profile inside...
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Oct 22, 2010
what if you created a pool of numbers: 1 - 21 and then chose a random selection from the pool? Something like the following:[code]This gets rid of those messy if statements and all of those loops.
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Nov 30, 2010
i had a look at how to set values of variables from nummbers stored in external txt files the variables then needed to be added up so i used trial and error first
((XVAL) + (NEWVAL))
assuming that XVAL was set to 10 and NEWVAL was set to 20 i expected to get the answer of thirty but waqs presented with the new value of 10 20 VB.net pysicaly added the two values together but i wanted the mathematical product of the two which is ((10) + (20)) = 30
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Dec 3, 2011
I'm passing a value to another form and later on use that value that is assigned to a variable.
Here is the code.
loadingPage.Show()
mode = "notime"
Dim ld As loadingPage
[Code]....
CurrentMode doesn't have a value. I don't know why. CurrentMode is a global variable.
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Feb 14, 2011
I have 3 variables. Lets call it "a", "b" and "c". These 3 variables can "independently" have 3 different values. Lets say: "1", "6" and "10". when you think of them as combination; there are (3^3) 27 combinations. I am told that it can be done through the recursive functions. However i am not a good developer to handle with that. Would u please help me?
- 3 variables and 3 different values are simplified. In fact; the numbers of variables and different values can vary.
- i know only the language, visual basic in .net; please don't answer in other coding languages.
additional note: i am going to put the these combinations in the string format into a collection.. for example "1;1;1", "1;6;1", "1;6;10".. and so on..
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Jul 15, 2011
I have a list of variables that are being created on one line.
Dim strFirstname, strMiddleName, strLastName As String
Is it possible to set the values for all of them at once? I know this doesn't work, but this is what I'm trying to do :
Dim strFirstname, strMiddleName, strLastName As String = ""
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May 31, 2010
I have a database in my app which loads and displays some information on a form by binding the Comboboxes and Textboxes. However, I need to get some of the other values from the database for calculations before they are displayed on the form and I can't seem to find out how to do this.I could bind a couple of Textboxes to the database and then use those values to calculate, but it doesn't seem like a very efficient way of doing things.The dataset is created using the wizard and the controls are linked in the UI.
Please bear with me, I'm still a noob.
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Sep 8, 2011
xmlreader and assigning variables values in .net 2.0?
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Jul 1, 2009
Quick query...I'm trying to scan a long string and return any values that occur between the tags <FileName> and </FileName> I've got a bit of code here to use regular expressions to return the position of the occurunces of both substrings..Just wanted to find out if there is any way to scan for both substrings within one loop (as im currently doing 2, one for the first substring and one for the 2nd) so I can use something along these lines:
ringlist = Mid(XMLRESP, (startloc + 1), (endloc - 1))
MsgBox(ringlist)
to msg box the value between the substrings...either that or another approach to return the value between the 2 substrings (it can be of variable length)
Dim patternstart As String = "<FileName>"
Dim patternend As String = "</FileName>"
Dim matchesstart As MatchCollection = Regex.Matches(XMLRESP, patternstart)
[code].....
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May 4, 2012
I am programmer from some time only, I have certain doubts in fundamentals, could you please clarify on the following:Case 1:
[Code]...
Does case 1 and case 2 yield same result, I mean is a private value necessarily in there?, can we use property itself to use its own value in its Set and get statements?
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Dec 20, 2011
I am learning visual basic .net and I am attempting to translate some java source code to a vb.net project. The project reads mp3 details and then splits the file accurately according to the frameheader details etc.
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Aug 10, 2010
i was wondering if we could assign variables into the values of attribute properties like say:
<System.Xml.Serialization.XmlType(namespace:="Result" + x)>
where x is a string with value "qwe" so basically we get the output:
<System.Xml.Serialization.XmlType(namespace:="Resultqwe")
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Sep 30, 2009
I am trying to bind a few values in xaml to variables declared in the code behind.
e.g.
vb.net
dim test as integer = 2
[code]....
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Nov 15, 2010
I am new to VB.Net 2008. I have a tricky task to resolve, it is regarding extracting characters (values) from a long string, the extracted values from the text shall be summed up and sorted by keywords, reformatted and saved into a CSV file.
[Code]...
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Apr 20, 2010
I as part of the support VB code for a larger ASP project, I need to read back the existing data from an Access database, to see if user has changed a value.
I'm reading the existing data back into a DataView using the following function:
Public Shared Function GetPolicyStatus(ByVal intPolicyID As Integer) As DataView
Dim strConString As String
Dim conMyData As OleDbConnection
[Code]....
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Mar 10, 2009
I have this string
mainString="/MyApp/ViewPage.aspx?userId=admin&password=1&id=975"
I am getting value in mainString using this code
Dim mainString As String = Request.QueryString("dest")
And I have two sting variables
1)strTempUsername
2)strTempPassword
In these variables I want to store userId and password values from mainString.
So for this requirement how I write logic in code
Dim arrArray() As String
'/MyApp/ViewPage.aspx?userId=admin&password=1&id=975"
strIndexq = mainString.IndexOf("?") ' Check QuestionMark Exist or not in mainString
If strIndexq > 0 Then
Dim strTemp As String
[Code] .....
Here I am getting userId and password but in this code I will get problem when after ? if userId and password starts wit capital letters and password maybe contain characters like "1&a"
And after getting userid and password. I want to remove userid and password from mainstring. So I want mainstring look like:
"/MyApp/ViewPage.aspx?id=975"
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Feb 17, 2011
I have a dataview and want to update using a stored procdure. My Update procedure is as follows. When I have a watch on my variables (int & amt) it is reading empty string even though I pass values. Yes cell(1) is my ID coumn and cell(8) is my amt coulmn
Protected
Sub GrdResult_RowUpdating(ByVal
sender As
[code].....
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Nov 19, 2009
I am using an INSERT INTO ... VALUES statement in the following matter to insert data into a new row of a database:
[Code]...
How can I substitute variables for the explicit values of X and Y in this statement (for example, variables XName, XAddress supplied by user input via text box)?
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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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May 4, 2011
Form1 has 2 public string variables defined and initialized to "" (an empty string).Form2 has 2 text boxes and a button. When the button is clicked the public variables on Form1 get set to the values in the text boxes.This works fine.I recently had to add a module to my project so that I could use Main as the startup item. Ever since doing that the above no longer works.The variables never get set to the values in the text boxes. They just stay empty.My Main code is simply this for now:
Dim f As New Form1
Application.Run(f)
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Mar 9, 2012
Anyone know right off hand a cleaver way to chop up a Text value from a table... Scenerio is this I have one table with a name (Smith, Timmy Alan) in a table text(30) format. I can pull the value to a string in VB but I want to only take the last name for one string and the first for an other string.
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Nov 30, 2010
I am interested in finding out how I can add and extract cell values in open office calc using VB.net.
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