Single Stored In A String?
Aug 9, 2011
I am struggling a bit with a string conversion. My platform is VB in Visual Studio 2010, windows form application. What I have is a Single float that occupies four characters of a string. Where Chr(0) is the LSB of the single and Chr(3) is the MSB of the single. This string is loaded by a built in function that communicates to an external microcontroller via tcp/ip that I do not wish to modify. I am having trouble figuring out a way to get these chars from a string to a single data type. I dont need to convert the data, just move it. But I keep getting type errors and not sure how to handle it in VB.
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Jun 22, 2010
i get an "This SqlTransaction has completed; it is no longer usable." error everytime i run my code:
the main code
If DBOpen() = True Then
Try
'begin transaction
[Code].....
i specified the transaction of sqlcommand named cmd via the Public Sub BeginTranscation. but, is this correct?
also, the error points to the Public Sub RollbackTransaction if the insert to the stored procedure fails. : "This SqlTransaction has completed; it is no longer usable."
how can i perform multiple stored procedure calls within a single transaction correctly?
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Jul 22, 2010
I'm new to LINQ and am having a problem getting proper results from a simple (working) stored procedure that takes no parameters and returns a single Integer. When calling this sproc with LINQ its returnvalue is always 0. When run using tableadapter or directly on the sql server it works, returning 6 digit values like 120123.
Here is my LINQ code:
Dim MeetingManager As New MeetingManagerDataContext
Dim MeetingID As Integer = MeetingManager.NewMeetingID().ReturnValue Here is the NewMeetingID procedure:
ALTER PROCEDURE [dbo].[NewMeetingID]
AS
SET NOCOUNT ON
BEGIN
[Code]...
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Jun 6, 2011
My application has a variable VAR_1 that is boolean, this name is also stored in database.
Now I need to set VAR_1 value in my app by reading database and asign x value,
How do I call VAL_1 from a string?, this is:
Dim VAL_1 as boolean
Dim str as string = myTable.Rows(0).item("x") <--- Here's the name "VAL_1"
But I just can't find how to call VAL_1 by converting "VAL_1" to variable
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May 3, 2011
In my website I have a textbox that allow user to enter a group of numbers like this:
(118,38,137,15,156,14,157,36,152,49,142,57)
Now i want your help to show me the way to store these numbers in array to be like this:
[118 38 137 15 156 14 157 36 152 49 142 57]
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Jun 6, 2011
I trying to figure out how to execute commands stored in string, let's say i have string called "command" and a textbox, so i want vb to run command that i typed in textbox, e.g. i type in textbox "label1.text = "bla bla"", and then type like "msgbox.show". Is that even possible?
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Dec 5, 2011
I'm attempting to use a product I've designed that stores 2 files on my web server space so I can access my stored data from anywhere. They are getting stored in the correct folder, but have several ___ (underscores) at the end of the file names.I'm sure it has to do with the way I bring back the stored string:My 2 variables are FILE1LOCATION (STRING) and FILE2LOCATION (STRING) They look just fine stored and recovered, but must not be.I recover them by the following code:
FileOpen(1, Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData) & "myfoldermyprogmyinfo.dat", OpenMode.Binary)
FILE1LOCATION = " "
FileGet(1, FILELOCATION1_UPLOAD, 40)
[code]....
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Feb 26, 2012
i would like to convert a single byte to a string.
dim mybyte as byte = &h11
dim mystring as string
i tried
[code].....
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Feb 15, 2010
I am trying to convert a string to a single. Ive tried csng() directcast() and single.parse. The first two methods crash. Single.parse says input string was in incorrect format. The number is 777.7932 so should convert fine. Ive tried it this way:
'x = single.parse(pts(0), globalization.NumberStyles.AllowDecimalPoint)
how can i convert a string representation of a single data type that is read from a text file into its single data type. I checked control panel and globalization settings are set to english.
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May 12, 2009
I have a problem with double and single quotes in a string.I have a textbox where i take a string from.In the textbox are double quotes and single quotes quotes.Problem is that if i return the string all the single quotes are replaced by double quotes.How can i get it to keep the single quotes as single quotes?
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Mar 15, 2011
It would seem to be Dim MyString as String = """""" but VB doesn't like that.
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Jul 12, 2009
I want to display a string (stored in a variable) in notepad(or any other default text editor depending upon the system). Saving to a text file is not necessary. I just want to open Notepad with an unsaved file containing the text. Please help
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Oct 19, 2010
I have fetched the html page and stored it as a string and now wish to parse it. I tried the following but I cannot get all the text between the following tags.
<entry...</entry>
If Not String.IsNullOrEmpty(_html) Then
'get all href tags in the html page
[code].....
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Jan 23, 2009
i want to 'send' a single string to a word object .. i need a hard-enter in that string
"Text" & vbCrlf & "Text" .. still gives me Text Text in word .. instead of
Text
Text
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Jun 24, 2010
While searching on how to escape a single quote in String.Format, I found the answer at SO: Escaping single quote in String.Format(). It seems to be different for VB though. I tested it, and indeed C# needs
string s = DateTime.Now.ToString("MMM d \'yy 'at' H:mmm");
while VB needs
Dim s As String = Now.ToString("MMM d 'yy 'at' H:mmm")
Why does C# need a double backslash, and VB a single backslash? This might be a bit of a silly question to C# users, but while I can read C#, I'm not used to writing it.
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Feb 11, 2012
Using the example piece "aString = Replace(TestString, "o", "i")"
I would like a count of every time it makes a change. Possible?
If not, is there a clean way to do a multiple incident replace within a single string and have it record counts?I know I can create loop throughs but they are slower and messy.
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Oct 22, 2010
Nothing on google what so ever.
Private mArryLinkEntries As List(Of String)
some timers i get a matching string in the list, so i need to remove one element[code]...
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Jun 20, 2012
I have a string that i need to split where there are 2 or more blankspaces, but i dont want to split it on single blankspace. For example, a string might look something like this:
"Name of something "five blanks" Name of something else "three blanks" And so on"
And i need the split to be:
Name of something
Name of something else
And so on
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Jun 12, 2011
I need to store a single string into Memory for later use on different pages to be able to create a log file for my app.
so on my 1st form(Login Form) i need to pass the Username to Memory and then read it from the memory later on on different pages.
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Nov 3, 2009
ow would I go about turning the number from an array into a single stringsay for example I had:
Dim MyArray(4) as Integer
MyArray(0) = 1
MyArray(1) = 2
[code].....
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Jan 28, 2011
I have a combobox which I want to use to change the font-size of text, but I'm getting an error.
vb.net Dim xfont As New Font(font_cbo.Text, font_cbo_size.Text, FontStyle.Regular, GraphicsUnit.Point)
Conversion to Type Single is invalid So I tried to convert the string to Single, but with the same error. If I replace the "font_cbo_size.Text" to a number, it'll work fine.
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Jun 2, 2012
I recently have been developing a app that uses the rijndael encrypt and decrypt function it stores dates in the registry (encrypted with a key using the algorithm)
for example Dim strOldDay As String = Key.GetValue("UserSettings", "").ToString the key was made using a private function called "createkeys"
example:
dim current as currentdate
Current.Day = DateTime.Now.Day.ToString
Current.Day = Encrypt(pPassPhrase, Current.Day)
[Code]....
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Mar 15, 2010
Trying to convert XML file to string and pass to stored procedure.
Dim fs As FileStream = File.Open(fileUpload1.PostedFile.FileName, FileMode.Open, FileAccess.Read)
Dim buffer(fs.Length) As Byte
fs.Read(buffer, 0, fs.Length - 1)
txtRawXML.Text = System.Text.ASCIIEncoding.ASCII.GetString(buffer)
When I tried to upload file I got error. The error description is 'A name contained an invalid character.'. Could not find prepared statement with handle 0. Could not find prepared statement with handle 0. sp_xml_removedocument: The value supplied for parameter number 1 is invalid. The statement has been terminated.
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Mar 24, 2011
I have a stored procedure in DBML and I try to pass the result to "sqlQryArray" as an array(1 dimensional array). But the bottom code causes error like below message. What else should be done?
Error 1 Value of type '1-dimensional array of aaaDatabase.stp_GetSomethingResult' cannot be converted to '1-dimensional array of String' because 'aaaDatabase.stp_GetSomethingResult' is not derived from 'String'.
The return result from stored procedure is a just list of first names of students(only one column)
Dim sqlQry = aaaLINQ.stp_GetSomething(bbb,ccc,ddd)
Dim sqlQryArray As String() = sqlQry.ToArray()
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Jul 23, 2009
encrypt the string values stored in the code.The problem is that when the code is compiled and the .exe file is generated, anybody can edit the .exe file with an text editor or another program and see the values.This is very important for me, because i have some password stored in string variables?
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Oct 26, 2010
I have been creating some asp.net sites that connect to an AS400 for data and I use a SQLDataSource for this with the following connection string (changed for security reasons). Now I need to create a winform application in VB.NET and am wondering how I would do this? I have only used MSSQL in winforms and use the sqldatareader for Select statements and execute non-query for others. I need to call some stored procedures on the AS400 passing parameters. I was hoping to do this by code like I do with MSSQL rather than drop in controls to bind to.
Provider=IBMDASQL.DataSource.1;Data Source=192.168.100.2;Password=xxxxx;User ID=xxxxx;Initial Catalog=S12345;Default Collection=AABBCC
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Dec 20, 2011
Can you set a condition inside the string.format parameter.So if i have
string.format("{0}" , if x = 7 then return "SEVEN" else return "ZERO")
Is there a way of doing this?
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Dec 27, 2011
I want to combine value become
A,B,C but my coding run the result as
ABC My coding:
& cboxOwner.Text & "' & '" , "' & '" & cboxOwner2.Text & "' , '" & cboxOwner3.Text & "'Any wrong?
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Jan 14, 2011
I am trying to do a SQL query that checks for the presence or absence of a character's occurance in a field / column as a condition to retrieve the row. In this case I only need to test for existance of the specified character and in a similar query to test for the non existence. Not where it is or how many, just is it there or is it notI am using VB express.net 2008 and it uses, I think, MS SQL Server 2008.Using VB's instr() I can tell straight away if a string does or doesn't contain a character, but I would like to know this before I retrieve the row.
using the
WHERE .... and [mytable.myfield] LIKE 'Q'
or
WHERE .... and [mytable.myfield] NOT LIKE 'Q'
produces a result, but not a correct result. It does something but I can not say that it is working even part way.CHARINDEX gets an undefined function error MATCHES also gets an undefined function error?CONTAINS looks like it should work but I am still getting sytax errors with it, so I don't know how to use that predicate yet.
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Oct 22, 2009
dim rownum as interger i need to extract "6" from the string
listviewitem {6} into the variable rownum
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