Here is what im trying to do. I have a loop and trying to concatenate it to produce the string. For whatever reason im getting test1, test2, etc instead of the variable equals to. What i am trying to do is get the value test1, etc.... from the concatenating test & cstr(a)
dim test1, test2, test3, test4, test 5 as string
test1 = "The"
test2 = "dog"
[CODE]...
This seems basic but here's my problem. I am trying to build my connect string as a public variable that will connect to either an express version of SQL Server or a non-express version. The app.config defines it as being express or not and is modified to the user's choosing when it is deployed using the a firstRun routine.
The problem is that even though I'm modifying the value of the variable SQLexpress when the app is initiated which in turn should modify the value of the variable g_strConnectionString it doesn't. The value of g_strConnectionString will always take on the initial value of SQLexpress. I know I can define 2 separate variables for the connection string but I'd prefer not to have to change all of the references throughout each of the various programs in this system as they all have the same issue.
So in the following load event I've traced it and when it sets globals.SQLexpress = "", I then look at the value of g_strConnectionString and it still contains "SQLEXPRESS". It seems I need to somehow force vb to refresh this variable after it's been changed.
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Dim a As String = ""
Dim x As Integer = 0
Dim y As String = ""
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I have a filename in a string. I want to split the given string into 2 (1 is filename without extension, 2 is only extension) strings. Then add _dev to the end of first string and concatenate with 2nd one.
ex: Dim name as string="abc.txt"
Dim finalName as string
The finalName should be like this "abc_dev.txt"
I am supporting an application, which uses lots of String concatenations and I believe this is the cause of a memory leak which eventually causes an OutOfMemory exception. Please have a look at the code below:
Public Sub ConcatenateString() As String Dim Test1 As String
Test1 = "Hello"
Test1=Test1 & "my"
Test1=Test1 & "name"
[code]....
I believe there are nine Strings in memory at line ten as String is an immutable object, but only one reference to the String Test1 that contains: "Hello my name is Joe Blogs what is yours?". My question is; are all of these Strings picked up by the garbage collector when they go out of scope? i.e. when the sub routine finishes running. I seem to have a memory leak and am thinking that I should really be using a StringBuilder object.
How do I concatenate a string in a asp.net gridview boundfield? I only want to show a "..." after a set number of characters that comeback from a Typed Data Set. Whats the best way to do this?
View 2 RepliesIs there a way to use [string].Join to concatenate html stings including spaces? I want to join html strings with a special character so I can pass them as an array to javascript from the code behind.
Dim Array(100)
As
String
ArrayString = [String].Join(",", Array)
This works great if each item in Array is one word only, but what if each item in Array contains spaces?
I have a string like "pen pencil table desktop watch" I have to format it like "penPencilTableDesktopWatch" ..... like convert to camel casing. Is there any method of string or string builder in which I can do it in one line ? ... (without splitting and formatting each string and concatenating.)
View 4 RepliesLast year (2010) I came across a FANTASTIC command that allowed me to take a string of variables with a common delimiter and break it all back out into separate variables (possibly an array) with one statement.
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As long as the delimiter was a unique specifiable character, this one-statement command could break it out into elements. my memory and point me in the right direction.
I have 2 string variables
subpaymentref
finalpaymentref
if the initial value of dr("tran_particular")='BCL/BC/NWSC/NWSC/18-May-2012/000001'
subpaymentref = dr("tran_particular")
finalpaymentref = subpaymentref.Substring(13, 50)
i have tried to use the substring function to format subpaymentref variable to produce a formatted string as below
'NWSC/18-May-2012/000001' but the final value of finalpaymentref is still 'BCL/BC/NWSC/NWSC/18-May-2012/000001'
Is the subtring function wrong?
I'm trying to use variables created within a loop, but I'm not sure how to do this. I've searched around on the net and there is a few recommendations to try and put what I require into a function then just call the function.
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I'll try to be brief, In short im trying to add together a variable, (name = STRFinValue) within a For loop, I think the syntax should be:
STRTotal = STRFinValue +STRFinValue(f)
But I am very wrong.
Private Sub btnLBTotal_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
[code].....
Sub Application_Start(ByVal sender As Object, ByVal e As EventArgs)
Dim chatters As List(Of Chatter) = New List(Of Chatter) chatters.Add(New Chatter(New Guid("CD863C27-2CEE-45fd-A2E0-A69E62B816B9"), "Me")) chatters.Add(New Chatter(Guid.NewGuid, "Juan")) chatters.Add(New Chatter(Guid.NewGuid, "Joe")) Application.Add("Chatters", chatters)
[code]....
I am unable to understand last 3 lines that are bold and underlined. Please what is hppening here. Chatter and Chat are two classes defined in App_Code folder. Is there any sight that contains all possible ways to declare and initilaze variables and data structure:
Dim chatters As List(Of Chatter) = New List(Of Chatter)
how would I do a loop with different my.settings variables?
ie lots of variables
My.Settings.numberofsites = 3
My.Settings.SiteDesc1 = Home
My.Settings.SiteDesc2 = Work
[Code]....
This would give me an error as there is no variable called SiteDesc.... but I actually want it to return SiteDesc1, then SiteDesc2 etc.
I have nine pictures that I need to animate -I need to use the ToString method and a counter to concatenate a file name into a string variable from the Image.FromFile method. Once the counter reaches its maximum value, and the last picture is displayed, the counter should be reset to zero or one depending on how the first image file has been name. Also a static counter variable should be incremented in the time routine. what I have so far -- I know what I have to do; however, I just do not know how to code this properly.. Right now I have this going thru a button procedure but it needs to go through a timer.
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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.
View 1 RepliesI need to assign variables dynamically in a loop. In php you would use curly brackets but this doesn't work in vb.
Dim i As Integer
For i = 1 To 12
lblMonth{i}.text = 'whatever
Next
Anyone know how I can escape the the i variable so it becomes part of the string that precededs it?
I am writing a program and i need to declare matrices but there will be a different number to declare everytime the program is run so I was wondering if anyone knew how to declare them inside a for loop
eg.
For i = 1 to NumberOfMatrices
Dim matrix i (5,5) As Double
Next
[code].....
This program asks the user for a number and then an amount to multiply it with and that amount should be added to the initial number. I need to loop because I am trying to display what the amount would be each day for a certain amount of days but in this loop its only calculating for the total .how to get the variables to change value to the updated day. I understand that its just keeping the same value in the variables I just need a push on how to get it to update the values through each loop.
I would like to loop over two string arrays but does not work.[code]...
View 4 RepliesI have a sub which requires multiple counter variables. Is there a more efficient way of doing this. My example is simple. Image if I had 20 separate counters I was trying to manage. I would have to create 20 separate variables and then increment each in the desired place in the code.
Dim Counter1 as Double
Dim Counter2 as Double
Dim Counter3 as Double
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I have some variables that are distinct by numbers, like in1, in2...If I have for loop, how would I access those variables, using the counter, and attaching it to the variable?I believe in JAVA, you could just use in+ct... where ct is the counter to access the variable.also how could you make a new variable in the for loop?Initially I had variables declare outside of the for loop. The problem was how to access those variables using the for loop.
var_nm1 = in1.Text
var_nm2 = in2.Text
var_nm3 = in3.Text
Dim nmList(2) As Integer
[code]....
This is object oriented programming, and I made the textboxes in1, in2, and in3 using the GUI editor. that was so easy.
In my loop I am trying to remove items from a list that have a certain name. I can't do this with a for-each, so I tried a regular for-loop. It seems the for loop is not working as expected. It always goes over the limit. I had to put an if-then to break out of the loop (very ugly solution). I'm trying to find the correct way to accomplish this. [code]...
View 1 RepliesThis is my first attempt at doing something in VB.net. I would like to be able to read a text file consisting of a column of data values and then pass the data as a variable to a sub that produces a line graph and updates it with each iteration through the loop. So far I have the code to read the file as well as some code that produces a line graph using hard coded values.
I am unsure how to call this sub from my loop such that I can pass that data value read from the file to the graphing sub.
How can I call the "PictureBox1_Paint" sub from my loop? How can I pass variables read from the data file to "PictureBox1_Paint" when I am calling it? Is there anything different that needs to be done if I want the graph to update with each iteration through the loop (for each data point)?
Public Class Form1
Private Sub Start_button_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Start_button.Click
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We have a project that needs to gather survey data. On one particular page of the website, there are 21 questions each with a scale of 1-5 where the user selects one radio button for each question in the table. The survey is being coded in VB.NET. The data submits to an SQL database. All the radio buttons are similarly named, so only the number changes for the question [Code]
View 2 RepliesI am using vb.net with phpMyAdmin MySql database. While running the piece of code below, the program hangs in the for loop before the variables are assigned values from the data table(dt)...
'Check for appraisal period-----------------------------------------------------------------------
Dim sqlCheckDate As String = "SELECT * FROM tblappraisalsetting where appSetID=(select max(appSetID) from tblappraisalsetting);"
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I have a somewhat unique problem that I have looked for an answer to and continually hit brick walls. The problem is this. I'm using vb.net to read a byte array from memory which total 32768 in length, which is converted to a string. The memory is the active console chunk in the game Call of Duty 4.
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I am writing an app to streamline my downloading and reading or manga, i usually download and manually extract each chapter into a specific location, based on what manga and chapter number it is. i then use windows picture viewer to read it.however, i can't work out a procedure that would take the manga name and chapter number out of the file name.i want to be able to pass the procedure a string containing the format that the file name is. e.g. "<title>_<chapter>_[IEM]" then i want the procedure to return the manga title and chapter umber into variables.for example, i pass the function "<title>_<chapter>_[IEM]" as the format string and [code]...
View 6 RepliesI am developing a program where i will download and save an xml file from a url as abc.xml. I open the abc.xml in a datagridview with a dataset without problem.I am confused how can i read raw per raw the datagridview and assign the data in a database table? i am using vb 2008 + msde2005 express.I show the whole content of the xml file in the datagridview with the following [code]I dont know how to create a loop where i can read the datagridview line by line save data in variables (ex.strings) and save it in a databese table?
View 6 RepliesIve looked it up, nothing really worked on 2008, I have a string that always the same length, and want to split it up into variables. The string looks like:
0-555-555
I have 3 designated variables for each number and I don't want to put them into an array.