.net - Operation In String Array Using .NET?
Apr 27, 2012
I want to know the behavior of string array when using For Each loop in it. Consider following code:
Dim StringArray(499) As String'fill in each element with random string
Dim count As Int32 Dim current As String For Each current in StringArray
[Code]...
As shown in the code above, if I need to access StringArray twice using For Each loop, is that true that ALL elements in StringArray will be loaded twice even though I only use 10 elements in each For Each loop? From performance point of view, is that advisable to use String array as data structure to store a list of strings that needed to be accessed multiple times, for example 20 times within a method?
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Jun 20, 2011
I have a problem: When try to change the text of a label array (label(1).text = "Lol") then I get a error:
"Cross-thread operation not valid: Control 'lblCSCH1' accessed from a thread other than the thread it was created on."
The code is this:
Private Sub Cliente_Receive(ByRef message As String) Handles Cliente.Receive
Dim anterior As String
Dim corte As Integer
[Code]....
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Nov 14, 2011
How to initialize a multidimensional array by loop operation in VB .Net?
I have some arrays called 'Room', 'Subject', and 'Population'.[code]....
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Sep 19, 2009
I am making the belated transition from VB6 to VB.NET (2008). I would appreciate some guidance on writing arrays to a file. I need to save and load large arrays of 4-byte floats (24 x 90,000 values is not uncommon). I can load or save them using nested for-next loops, but that's quite slow. I'd like to find a single operation that can read or write the binary data.In VB6 I could accomplish this (writing case shown) with Put #1 , , MyArray()I can read and write single variables from binary files without problems in .net. For example, [code]I have looked and looked, and Googled endlessly, but cannot find out how to accomplish a single-line numeric, floating-point array read or write in VB.NET.
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Feb 13, 2010
I know if I use String.Split on "Alpha Beta", with the space character as the separator, I will get "Alpha" "Beta". My question is, how do I then handle "Alpha" and "Beta" as separate strings in future code?
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Mar 11, 2010
my code is :
[Code]...
The error is Value of type '1-dimensional array of string' cannot be converted to 'String'.
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Jan 4, 2012
I'm trying to convert code from Delphi to .Net. I'm stuck on one line:
//Delphi code ss := Copy(ss, Length(ss), 1) + Copy(ss, 1,Length(ss) - 1); 'vb.net code ss = ss.Substring(0, ss.Length - 1) + ss.Substring(1, ss.Length - 1)
Delphi combines the two substrings, while .Net just concatenate them like a copy.
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Jul 13, 2010
i have an array contains a-z.Then i have a textbox and when click on the button, it will replace the text inside the textbox to the index number of the array.Example, from "abc" will become "0 1 2" The code below do the job.how to do so that i can replace the text inside the textbox from "0 1 2" back to "abc" based on the array?
Dim txtKey As String = readKeyTxt.Text
readKeyTxt.Text = ""
For Each b As String In txtKey[code].....
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Aug 25, 2010
I need to append STRINg to Array and cast it 1-dimensionalArray
Dim remoteFileNames(0)
As
String
[Code]....
Here "FtpRemoteDirectory" is a string and ftpFileNames() is the Array String which list the FileNames.
and remoteFileNames is 1-dimension array
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Feb 24, 2009
I am writing an OPC Client in VB.NET (2008) and I am using an OPC wrapper from Graybox. I am having some problems with the data types. I have an Array of String that contains all of the OPC Items that I wish to read from the OPC Server. When I attempt to use the Array of String, Option Strict causes the following compile error message:Error 5 Option Strict On disallows narrowing from type 'System.Array' to type '1-dimensional array of String' in copying the value of 'ByRef' parameter 'ItemIDs' back to the matching argument. How do I pass the Item ID's (all strings) in an array?
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May 27, 2010
I'm having problems with marshaling in VB.NET to C++, here's the code :
In the C++ DLL :
struct APP_PARAM
{
[code].....
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Oct 7, 2009
I have an array defined As string and the value stored in site is like "7E", "A1" and so on. But in order to send out this array through serial port. I need to change the the array to As Byte instead of using As String. How can I convert it?
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May 27, 2009
I've been working with a sig capture application sample on a windows mobile device, The data is sent via IP to a host as a byte array and is then drawn onto the screen of the host as it appeared on the client. I was able to get this into the form of a bitmap object so I could print it or save to a jpg file. That all works well. The problem now is that I need to store this data in a database and then be able to recall it at a later time and recreate the signature image.
The byte array data is much smaller than the actual image so I would like to store it in that form. My issue is that when I convert this byte array into a string and back again my program can no longer re-create the image. Once I saw the problem I created the code below as a test and added the msgboxes to get an idea what was happened to my data.
[Code]....
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May 12, 2011
i have 2 string arrays and I want to merge them together then put the elements into a third string array ..
for an example :
string1="a","b","c"
string2="d","e","f"
after merging:
string3="a","b","c","d","e","f"
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Aug 27, 2011
Im working on a program and I get this "Value of type '1-dimensional array of String' cannot be converted to 'String'." heres the code that gets this error:
[Code]...
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Jan 17, 2010
I don't understand why the line final.join etc pops up with these errors!! Value of type 'String' cannot be converted to '1-dimensional array of String' And Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated This is my code.
[Code]...
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Jul 29, 2011
I want the Function to accept List(Of String), Array & String and similarly return List(Of String), Array & String respectively. The Function simply adds a string (month) to the input collection. I just want to use it for string, array and list with needing to think of conversions.
[Code]...
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Jan 15, 2010
I need to do this to every line in a file and save the # five Element in an array. I keep getting (error code 1 Value of type '1-dimensional array of String' cannot be converted to 'String'.)
NOTE: if I change ( Dim Lineoftext(1) to Dim Lineoftextt works) (It does't seem to work with arrays)
Public Class Form1
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
[CODE]....
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Jul 13, 2010
I am trying to the copy the value from string to char array using String.CopyTo() method.
Here's my code
Dim strString As String = "Hello World!"
Dim strCopy(12) As Char
strString.CopyTo(0, strCopy, 0, 12)
[code]....
Edit : I get the this error at runtime.ArgumentOutOfRangeException Index and count must refer to a location within the string. Parameter name: sourceIndex
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Dec 8, 2009
Try
Dim authTicket As FormsAuthenticationTicket = _
FormsAuthentication.Decrypt(authCookie.Value)
[Code].....
Error1Value of type 'String' cannot be converted to '1-dimensional array of String'.C:xxx
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Aug 5, 2011
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click Roles.AddUsersToRole(DropDownList1.SelectedValue, DropDownList2.SelectedValue) Label1.Text = DropDownList1.SelectedValue + "Was Add to the" + DropDownList2.SelectedValue + "Role"
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Jan 18, 2011
I'm making a card game and the first thing I'm doing for it is generating a random card. I used an array for the cards (can't think of a better way to assign a picturebox to a card picture other then a huge select case block). I'm trying to split the 2D array into two parts but it doesn't work.
My current
vb
Public Class frmMain
Private Function Flop() 'First three common cards to be displayed.
[Code].....
I looked around online and I don't think a list will work for my 2-dimensional array.
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Aug 27, 2009
Is there a way to use the string.split command to get a section of a string without using an intermediary array?for example, if my string is "1 2" and I want to get the "2" part using string.split(" "), is there a way to avoid creating a new array, and just get the bit of the string I want in a single line?
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Nov 2, 2009
I'm trying to use DataView.Rowfilter and I'm getting an exception which says "Cannot perform 'Like' operation on System.Int32 and System.String".
Here's the code...
Dim str2 As Double = CDbl(searchSTR)
Me.shipperDV.RowFilter = fieldName & " LIKE '*" & str2 & "*'"
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Mar 6, 2010
I wrote the code below which calculates the length of a line on the form and save record. An error occurs when the programme tries to save the record. It gives me "Cannot perform '=' operation on System.Int32 and System.String" error. I checked the data type of "ID"(int), "Microscope"(Varchar), "Magnification"(int) and "Calibration"(Decimal), and they are fine so far as I know.
Code:
Private Sub btnEnd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnEnd.Click
'Check if the length textbox is not empty
[Code].....
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Nov 3, 2009
Here is the code I am working with, everything works fine up until last line then i get evaluate exception unhandled "Cannot perform '=' operation on System.Int32 and System.String." My eyes are going blind trying to figure out whats wrong, if I understand correctly it cant count system string and REO is a string value.
The thing i have done this before ,count that is. I know you cant average strings and some other function but i have been able to count.
d Dim comm As New OleDb.OleDbCommand("Select * From " & Me.OpenFileDialog1.SafeFileName & " Where Status <> 'S'", con)
Dim dalist As New OleDbDataAdapter(comm)
Dim comm1 As New OleDbCommand("SELECT * FROM " & Me.OpenFileDialog1.SafeFileName & " Where Status
[CODE]...
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Dec 24, 2011
I need to convert a string array into a very long string with following requirement:
can not using any character escaping can not using XML can not using single character as separator (e.g. comma or space as separator)
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Nov 17, 2010
I have a C++ method with this signature:
[Code]...
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Sep 11, 2011
I have a long string like this
dim LongString as String = "123abc456def789ghi"
And I want to split it into a string array. Each element of the array should be in 3 characters length[code]...
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Apr 29, 2009
I have a string which I've split into an array. I need to change a value in the array and join the string together. However I cannot set the value of the array variable as it's read only.Is there any way to do this without creating another array?
Dim LineOfText As StringDim aryTextFile As String[code...]
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