String.ToCharArray() Stored In StringCollection Conversion To Numbers And Back
Aug 25, 2009
I have a string which was converted to a char array and stored in a stringcollection, how do I return the numerical value for the character in each string? How can I reverse this process, getting the character from the numerical value?
I know I could code a Select Case statement, but that would take a very long time as I need to cover every character a person could want to conceivably use in the English language, including punctuation. Is there already a method built into vb.net for doing this?
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May 10, 2009
Normally, I'd choose List<String> [or, in VB, List(Of String)] over StringCollection whenever possible: see also Best string container.
However, as it seems, generics — and hence, List<String> — are apparently not supported in VS 2008's settings designer. Therefore, if I want to use a list of strings in my user settings, I have to resort to using a StringCollection there.
Now as I don't want to see StringCollection throughout my code, I need to convert it to List<String>. How do I do this efficiently? Or, even better, am I mistaken and there is a way to use List<String> in settings designer?
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Oct 4, 2011
I am making a program, where the user enters 6 numbers in 6 different text boxes, and it displays the larger of those 6 numbers. But I also want to make it where if the user enters a string value (like S for instance) in the text boxes, it gives an message and says "please enter the numbers again" and the user gets to enter the 6 numbers again. But when I do try to do that, it gives an error message saying conversion from "w/e the user entered" to Double is not valid. If the user just enters the numbers, it works fine. However, I am trying to make it if the user does enter non numeric value, it gives a message window and the user can reenter the numbers again.
Here is my code Example
CODE:
This is where I am trying to use IsNumeric to show a message if a user does not enter a string so the user can renter the numbers again, but when the user does enter a string value (say in textbox 1) it gives me an error message saying conversion from "S" to 'double' is not valid.
CODE:
Then right here this is where I have my series of ifs statements, this part works fine, it displays the largest numbers of the 6 textboxes every time. Error free.
CODE:
And do this with variable number 2, 3, 4, 5.
I know there are easier ways to do these with arrays and stuff. But I am not there yet. I am still learning about ifs and stuff.
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Jun 7, 2010
I've got some code that creates a list of AD groups that the user is a member of, with the intention of saying 'if user is a member of GroupX then allow admin access, if not allow basic access'.
I was using a StringCollection to store this list of Groups, and intended to use the Contains method to test for membership of my admin group, but the problem is that this method only compares the full string - but my AD groups values are formatted as cn=GroupX, etc....
I want to be easily able to determine if a particular substring (i.e. 'GroupX') appears in the list of groups. I could always iterate through the groups check each for a substring representing my AD group name, but I'm more interested in finding out if there is a 'better' way.
Clearly there are a number of repositories for the list of Groups, and it appears that Generics (List(Of String)) are more commonly preferred (which I may well implement anyway) but there is no in-built means of checking for a substring using this method either.
I've settled on using a List(Of), and I've borrowed from Dan's code to iterate through the list.
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Apr 8, 2009
a user will enter a number, n, which ranges from 1 to 30. they will also enter a "P" or an "S" (sum or product). depending on which was selected, it will calculate the sum or product of the numbers from 1 to n.i'm having a conversion error on line 5 stating "Conversion from string "S" to type 'Double' is not valid." [code]
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Jun 15, 2012
Here's the function I'm a bit mystified by(Little rusty bitwise operators)
void two_one(unsigned char *in,int in_len,unsigned char *out)
{
unsigned char tmpc;
int i;
[CODE]...
I marked the two places that I don't quite understand. How to convert those pieces to Vb.Net.
Update: So this is what I came up with, but it's not quite giving me back the right data...Anything look wrong here?
Public Function TwoOne(ByVal inp As String) As String
Dim temp As New StringBuilder()
Dim tempc As Char
[code].......
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Sep 21, 2009
I'm writing a application that has to check live what's going on somewhere. The data is stored in a integer array.But this data comes from a PLC over a COM port. So imagine if someone pulled out the cable while my application is running. I have to find a way that the integer array will be stored somewhere when my application crashes. I thought maybe I could do something with a text file? But how do I get my application to store the data when it crashes? Do I have to surround my whole code with a try catch and then in the catch save everything to a text file? Well I like to know if some of you have better ideas or can point me in the right direction.
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Nov 8, 2011
I Have been, for a long time, try to convert between Cartesian(Or Raster) coordinates and Polar coordinates.I have found plenty of sites, forums, etc. that explain how to do it, but have had a hard time putting it all into code as I was never great at math.I'm using Visual Studio 2010 Express, and Visual Basic.
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Jun 2, 2010
Structure MainStruct
Dim Ans1 As String
Dim Ans2 As String
End Structure
[code]....
The question is how can i read back the contents of the list, stored in the Session?I mean something like...
Build = Session("MyData")
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Oct 24, 2010
I have this code below that I called a Conversion Wizard Because it converts temperature, weight and currency. It works so far but I am stuck. I don't know how to apply the correct loops to it. For example, Do While and Do Until. I want it to be able to work out a conversion then loop back to the Menu-options. So that you can do as many conversions as you like and end when option 4 is selected.
Option Explicit On
Module ConversionWizard
Sub Main()
Dim userOption As Integer
Dim farenHeight As Integer
[Code] .....
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Feb 18, 2009
I have an app written in vb2005 that allows users to search a sql database for a store name. Once a store is selected, it then presents the user with 12 different tabs, each with a DataGridView showing various bits of info about the store. It's a large and convoluted database, so I'm using stored proceedures to pull the data for each tab. Here's a sample of one of the subs that populates the tabs.[code...]
Now, this works just fine to populate the grids on the tabs, and the same code is copied into each of the subs that fill the grids (changing the stored proc, parameter and grid names, of course). The problem I'm having is how to move changes made to the data in the grid back into the database.
I have stored procs that do this (and the procs do work), I just can't seem to figure out how to trigger the stored proc when the user makes a change.
If it matters, there is only a grid on each tab, I did not use a binding source as I am trying to keep an abstraction layer between the data and the app. I did create a dataset, which is how I gain access to the stored procs, but I left the grids unbound and (as seen in my code) bind them at run time.
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Jan 4, 2012
this is the first time i am calling a stored procedure via vb.net and i would like to make sure i have everything correct before i execute it. This is my code:
[Code]...
The stored procedure returns 6 colums worth of data and i would like to add that data to a listview. I'm not sure i have the correct sytax for doing that but this is what i used in my previous sql code (running a query with, not a stored procedure). Also, i'm not sure how to go about getting data for the @xxx names above from a textbox? How do i pass the values into the @xxx names from the users textbox? The MS SQL mangement studio code is this for the the stored procedure:
[Code]...
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Sep 25, 2011
I have been having a wonderful Sunday trying to figure out Stored Procedures, created via vb.net and input into Sql Server 2008.
I've created a Stored Procedure... That I pass an Integer in a parameter, I want to get back a String.
Here's the vb.net Stored Procedure Code:
Imports
Microsoft.SqlServer.Server
Imports
[Code].....
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Apr 9, 2012
i have a text boxt where i enter a number ;for ex if i entered 567 it should convert the number to 100056700
if no is 978 then it should b converted to 100097800
if no is 5678 thn it should be converted to 100567800 always there should be last 2 digits that are 0's
in sql server i dit it as
@DelershipID= 100000000
+ CONVERT(INT,(CONVERT(varchar(4),@DealershipID)
+ '00'))
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Jun 9, 2011
I am developing a Windows application for restoring specific databases from our Production platform to "field" tablets by using backups that are taken daily to disk. To preclude "orphaned users" on the tablets, I want to extract the "user name", "password" (hashed) and "sid".I am calling the MS Stored Procedure "revlogin" that produces screen text to copy and paste into a query to recreate those users on another SQL server instance.
IF (@denylogin = 1)
BEGIN -- login is denied access
SET @tmpstr = @tmpstr + '; DENY CONNECT SQL TO ' + QUOTENAME( @name )
[code].....
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Sep 23, 2010
This long code runs only until 119. If you exceed to 119, it won't convert it to words. I know I can use the same method but the codes will be too long.
Dim a(19) As String
Dim b(10) As String
Dim c(5) As String
[Code]......
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Apr 21, 2009
I am in a programming class, and am one of the best students in it, I even went to a state programming contest. One of the problems was to enter 6 race times in a Console Application and have it display the times back in order of which were fastest and their place such as
imput
11
15
12
[Code]....
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Sep 13, 2010
I'm rather new here (actually just made this account in hopes of getting this question answered. I'm currently attempting to try and get text from a textbox to change the letters to numbers. A weak encryption if you will.Example:jack and jill ran up the hill in numbers would be say j=30 a=20 c=99 d=200 ect
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Mar 12, 2012
I've used a numericupdown to select a number and then save it to a .dat file
When i try to display the integer in a listbox, it appears as a random sequence of numbers.
for example, if i input 200 into the numbericupdown, when displayed in the listbox, it is shown as 538976366
Is it an error with the properties with either the numericupdown or the listbox? or do you need to see my code?
let me know if you need any more information or code
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Aug 16, 2011
I need to know how to do a web service conversion which will convert only three figured whole numbers into strings??
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Apr 4, 2012
Write a function that will take one integer input parameter, create a sequence of numbers stored in an array from 0 to that number, and the numbers are a summation. For example, given 7
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Jan 22, 2010
I need some help with to make a messages system. I build a form with display a message code and the message.
Example : 0000001 : Not connected to network
The problem is that i want to store in a central place where the numbers and the message will be stored in the code. I was thinking about a array to store the date.
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Aug 12, 2009
Private Function SingleToIEEE754Hex(ByVal pValue As Single) As String
[Code]...
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Apr 8, 2011
I'm trying to code a program but this error repeatedly shows up and I can't for the life of me figure it out EValue of type 'String' cannot be converted to 'System.Windows.Forms.TextBox'. It appears in relation to this code
[Code]...
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Jun 12, 2011
The string itself contains things like "random" & random.next(1,3) & "random2" etc. The string registers all of this as a string and doesn't actually calculate random numbers.Is there any way to fix this?
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Mar 20, 2011
Does anyone knows how to get the most used word in a string collection. The second most used word etc. till the 10 most used words.
Example:
I have a string collection with.
Car
Car
Bike
Scooter
Car
Bike
Bike
Bike
Now i want to get the word Bike as first because this is the most used word. And after that i want the word Car because that is the second most used word. Then Scooter.
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May 1, 2010
Here's a try on how to check if a sting collection has 0 strings[code]...
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Nov 11, 2005
tried using the application settings yet. Everything seems to work well except when I specify the type as a string collection. When I try to add new items at run time using the property window I get the following error:Constructor on type 'System.String' not found.Do I need to do something else to make this work?
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Nov 10, 2009
I have a class called CookieMonster, its objective is to simply create a cookie based on 3 parameters passed to it. The cookie name, the cookie name-value pairs and the cookie expiry date.I have experimented with List(of T) and Array and StringCollection, but I'm unsure which is the best for passing the name-value pairs and providing that information to the class.Ideally, I'd like to be able to do something like this:
Dim l As New List(Of String)
l.Add("name", "value")
l.Add("name", "value")
[code].....
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Aug 15, 2011
I need a code that can allow the login form to search for pin number stored in another form example when a customer enters the pin number and clicks ok button the login form searches if the pin number exists in the bank details form
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