First things first, sorry if this is in the wrong section and sorry if it has been answered many times before. I have no idea what to search for.
I have two integers and a char which is a maths operator (+ - / * ). What I would like to do is use the operator and pass the answer to another integer. Something along the lines of "Integer3 = Integer1 (Char) Integer2".
i want to read a character 1 by 1 from a string and a .txt, i know all about stream reader so for the .txt would it be somthing like:textbox1.text = tr.readCharacter.i would prefer to be able to read from a textbox or String array though.
View 10 RepliesI need validation for string to comply with next: no space char starts with one delimiter char ends with one delimiter char has no other char as delimiter char. Updated sorry missed that should only be one delimiter char at start and at the end
View 2 RepliesPublic Shared Function UrlTokenDecode(ByVal input As String) As Byte()
If (input Is Nothing) Then
Throw New ArgumentNullException("input")[code].....
i am trying to increment a char in vb.net, eg: Dim letter As Char = "a"c. and i want to make it b, and so on. how can i do this?
View 1 RepliesI have split a string into a char array, now i need to copy the char array to an int array with the ASCII values of each char.Donīt know how to do it without looping each value.
This is my code:
origen = RichTextBox1.Text.ToString
Dim valor As Char() = origen.ToCharArray
Dim numeros As Integer() = (How can i convert "valor" to an int array?????)
i have found [char] specified in some of the examples at msdn , what is the difference between char and [char]
View 2 RepliesFirst let me say that I am not sure whether or not this should go in this section or the API section, and if it needs to be moved I apologize. My issue is fairly straight forward, but for some reason I cannot get it to work.
I am trying to send a command to a command line and then submit the command. I have been trying without success to get this to work in v2008 Express and v2010 Express, Here is the code I am trying to us:
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" ( _
ByVal lpClassName As String, _
ByVal lpWindowName As String _
[Code].....
I am currently using psexec.exe from PsTools to send a command to a remote system to fire a command through a command prompt however I am finding that the shell I am doing does not seem to like the spaces in the path.
[Code]...
Any ideas on how I handle the following error thrown in the SqlDataAdapter.Fill as a result of the BeginTrans in the callee?
System.InvalidOperationException = {"ExecuteReader requires the command to have a transaction when the connection assigned to the command is in a pending local transaction.The Transaction property of the command has not been initialized."}
[code].....
Public Sub ExecuteTransaction(ByVal connectionString As String) Using connection As New OleDbConnection(connectionString)
Dim command
As New OleDbCommand()
Dim transaction
As OleDbTransaction
[Code]...
I am using the following code to run defrag and to analyze if the C: drive requires defragmentation:
Dim analyze As Process = System.Diagnostics.Process.Start("C:WindowsSystem32defrag.exe", "C: /a /h /u /v")
This process runs through analyzing, runs it in normal mode & prints the progress to the command window.
My problem is that as soon as the process is complete the command window closes. I need it to stay open so that I can read the results.
I am trying to send a command to the external command line (cmd.exe) from the Windows form application that I'm writing in VB.NET (using VS2008).
I can only access the external program thru the command line (its not my program) and I must do so from a form app.
I am trying to use the following code. I am able to call a cmd.exe window, but I can't pass the command line my command.
Using mp As New Process
With mp.StartInfo
.FileName = "cmd.exe"
[Code].....
I want to add a new select command to my dataset. To do that, I have added a new partial class to my project. Because we have to use partial class if we want to extend generated dataset codes. [code]...
View 3 RepliesI am using a CheckedListBox that is populated with Filenames (full path, i.e. C:TestTest.jpg)When I have the files that I want in the CheckedListBox I wish to click a Start Button which will process the list one at a time using an exe program that runs on the Command Line. There are arguments that need to pass to the command line as well as the file location in order for the program to process.I currently have it working but the issue is the loop finishes quickly and it is left up to the CMD.exe to finish the process. What I would like is for the LOOP to wait until each file completes processing before passing the command for the next file in the CheckedListBox.There some reasons I wish for it to work this way.
1) I would like to have a button that can Pause/Restart the Loop.
2) I would like to have a button that can Stop the Loop so the whole process can end.
3) I would like to have the Loop remove each file one by one from the CheckedListBox after it has been processed.
4) I would like to display a Message once all the files have been processed.
5) And if it were possible I would like to report the status either by text or a progress bar showing where it is at in the process.
6) And the ability to add some error handling if possible.
Since the Loop finishes so quickly as it just passes the command to the command line using the & as a seperator it is the command line that is handling the rest of the process. Because of this there is not control over it in the GUI.The code I am using allows the Command Line text to display in the Form so it won't open up a seperate window to run CMD.exe. This is the desired affect as I would like everything to appear to run from within the Form itself.
[Code]...
User need to select their prefferable data to show in report. What i did is i have a clear command first to delete the temporary table. The temporary table is basically a table to stored user selection parameter data. After the clear command, i have
a insert command to insert user selection data into the temporary table. What happened now is when i run the program exe, first run of the report is work fined, but not the second and the following times of execution. It will return null or blank report. The weird thing is when i execute it from development environment, it seem like the report is able to pick up user selection parameter and run the report for the first times and the subsequent execution.
i have seen this in many codes, just not sure where to start and how to call the command. what i'm talking about is having code as such (this is for save file dialog):
[Code]...
In the Windows Shell, there is a command that looks like this: copy /b fileA.zip + fileB.jpg fileC.jpg..Is there any equivalent function in VB.NET? I already know this works: [code] But I would much rather have a built-in function to work with. Here is what I am trying to do: url...Also, this doesn't just work for pictures. It works for any binary file. Is there any way in VB.NET to tell if a file is binary or text?
View 3 RepliesIs there a way to hide the characters of a "set /p password=Enter Password:" command? Or any new strand not using the SET command i could use instead?
View 2 RepliesI have a textbox with value in it like: "577457747037375770" and so on, i want to XOR each value of them with "0x1b" how can i do that ?Like "0x1b" XOR 57 ; "0x1b" XOR 74 ; "0x1b" XOR 87 and so on for all value in textbox.I don't want to check if the value in the textbox is in the good format, i want just XOR them all.
View 2 RepliesI have a DLL that I am importing:Declare Function QueryInfo Lib "mydllname" (ByVal DevName As String, ByVal pcQueryParam As String, ByVal Result As String, ByVal Length As Int32) As Int32
[Code]...
Anyone have an idea what the issue could be? If I run similar code in VB6 (only diff is mtStatus = String(mtValueSize, Chr$(0)) ) it returns what I expect.
I am currently using a C .dll file in my vb.net project, and need to access a string that it returns (as a pointer to a char array). How can I access this?
Private Declare Function src_error Lib "libsamplerate.dll" (ByVal err As Integer) As (???) 'i've tried intptr, string, integer, none work
<MarshalAs(UnmanagedType.LPTStr)> Dim ptr As String
...and then in the actual function,
ptr = src_error(6) 'returns an error based on what combination of things I've tried
i have a C++ DLL. What i am doing is that i am passing memory address to my C++ dll where it write message on that address and i want to read the message from that memory address.
Here is my C++ function.
int _stdcall Test(int res, wchar_t *text)
Now in my C#.Net test app .. if i use unsafe char* .. i am getting proper output.
Declaration
static extern unsafe int Test(char* msg);
Implementation
[code].....
Now implementing in vb.net i am getting jst 1st character by using stringbuilder.
Dec
Private Shared Function Test(ByVal msg As StringBuilder) As Integer
Imp
[code].....
What is the replacement for char* in .Net ?
I am struggling to pass a parameter to a VB.NET application via a Windows scheduled task. It works perfectly in Visual Studio (passing a command line arguement via project properties).If I am calling a VB6 application, then I will supply the following parameters and it works:
Run: c:progra~1TestTest.exe TestParameter Start In: c:progra~1Test However, if I supply the same parameters in VB.NET, the program throws an exception when it tries to create an instance of a class in the Form.Load: System.NullReferenceException cannot create instance of object.
I have also tried the following:Run: c:program filesTestTest.exe TestParameter Start In: "c:program filesTest" This time the status of the scheduled task changes to "cannot start".What is the correct way to specify command line parameters in a scheduled task for a VB.NET program?UPDATE I found the solution on this web page:[URL}.. I am still confused as to why the program would not create an instance of an object when I used the 8 bit paths (i.e. progra~1)
I'm running into the following error message when I click the button event: Command text was not set for the command object. [code]
View 1 RepliesIf I comment out MdiUpdate() this run fine. When I run it with MdiUpdate I get the following Error...
da.Fill(ds,
"Mdi") Command text was not set for the command object.
I have also taken the code from the select statement and put it into the other 2 (replace the CliendGroupID = 3) and it works fine
Here is the code:
Public
Class NewFileInput
Dim inc As Integer
[code]....
I have built a DataTable from my database. Then I am looping through the rows and trying to access a string, however the value is being returned as each character in the string.
For Each theseRows In DisplayForm.MainTab.Rows
If theseRows.Item("Last_Name") = userLast And theseRows.Item("First_Name") = userFirst Then
[Code]....
The Trap_Code values are two or three letter strings, the returned value is each letter once at a time. The loop seems to cycle through the individual characters of the string as an array rather than display the entire value, which is what I was hoping for.
Private Sub TbxInput_KeyUp(ByVal sender As System.Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles TbxInput.KeyUp
[Code]...
Basically, what this code is supposed to do is compare the text inputted in the input textbox with the text of the string answerstring. It seems to successfully compare the two, but every time I type the first char into the input textbox the program crashes, givingmythe Out of Range Exception. I assume it means the Char() "array" thats built into vb is out of bounds, however as i've set the while loop so that it only is executed when the whilecount is less than both the length of the input textbox and the answerstring, I don't see how it could be out of bounds.
The following code:
If checkboxList.Items(i).Selected Then
.Fields("DESC1").Value += checkboxList.Items(i).Text + ", "
End If
should produce output such as "A, B, C,(space)", which will then be bound to a dynamically created GridView. I would like to remove the last two-char string, that is ",(space)". How can I do this?
In .Net, given a char, is there a way to tell if that character is part of a specific Unicode category? The categories I'm interested are defined here http:[url]......For example, is there a function that does anything like this?:
bool isCharInClass(Char c, String class)
that could be called like:
SomeClass.isCharInClass("a", "Lo");