I am calling a Fortran dll from vb.net. It works when I call it it one time only. When I put that in a loop, it works for the first time and second time it quits the program. How can I run this in a loop?
View 4 RepliesI am running one fortran exe in .net application(calling from command line with the help of system diagnostic process). If we directly click on fortran exe, it shows inputs to enter for fortran in command window, after input entered it gets executed. We want same behaviour but want to run fortran exe from .net application, If we click on button in vb.net form, this exe should get called and should show inputs to enter on the command line, once inputs entered it should execute. How to achieve this with .net application? Right now, after clicking on button in vb.net form, exe get's opened in command window, but it is blank, and gets hanged. [code]
View 1 Replieshave problem with calling a Fortran DLL from VB.net Program. The VB program provide the GUI while the Fortran DLL does the calculations.The Fortran DLL opens and reads from data files supplied by the VB program. however, DLL program displays a message that says it can not open the file.
View 1 RepliesI have a subroutine that was written in fortran that I need to call from VB.NET where all of my other functions are written. I did not write the fortran, and hardly know fortran. I am getting the below exception on my dll function call and don't know how to fix it. I wonder if it is due to incongruent variable lengths? I have the source for my fortran and compiled it using the g95 compiler. I have tried compiling it with a flag on which is supposed to force all of the reals to 32 bits (-r4). It weirds me out that you don't seem to be required to initialize variables before use in fortran. I thought it was supposed to be a ridged language.
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I am trying to call a fortran DLL from VB.NET. Fortran function requires two character strings to be passed from VB to fortran. I am able to run the code with a change after receiveing a AccessViolationException error. I dont understand why it worked can
some one whose professional explain me the difference. Here I am attaching the codes for reference
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I was wondering if there was a way to write fortran or to integrate fortran to Visual Basic .net 2010..Maybe with adding a refferance or something? what options are available?
View 5 RepliesI am trying to run a fortran .exe in VB with the Shell() command. The fortran .exe, when ran, it asks you for a file name. It works perfectly on it's own, but when I try calling it through VB Shell(), it does not work.. (i.e. I cannot get VB to get the file name in it.)
Added info:I am using VB9 but I'm writing in compatibility to .NET. As for the Fortran .exe, when you call it, it opens a command window where it asks for a file name (which I got as a string in VB and I'm trying to pass it in), then you press Enter and it's done. Basically the .exe takes a text file and creates a new text file. We've also tried adding & mystring when calling the exe, but it gives a "file not found" error.
I have a random function and a for loop which sets those random numbers to an integer
For i As Integer = 1 To 4
nums(i) = Randomfunc(0, 100)
Next
[code].....
I am trying to run the function:
Code:
Private Sub port_dataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles port.DataReceived
from inside a while loop of a different function ie.
Code:
While A_switch = 0
System.Threading.Thread.Sleep(100) ' Sleep for .1 second
calabrate_send = calabrate_send - 5
[code]....
the real problem is that the serial call updates the value of A_switch which is need to exit the loop at the correct time?
I have a .dll file (Interop.ACTMULTILib.dll) that I use to connect to a PLC. This .dll contains a sub called ReadDeviceBlock2(byval devicename as string, byval size as integer, byref data as short). When I call this method in my main it works fine, if I call it from another method that was called by main it works as well.However, it doesn't work when I call it from my Timer_Elapsed sub? I guess this has to do something with threads but I can't figure it out.
Module Main
Private Timer As New System.Timers.Timer
Private PLC As New ACTMULTILib.ActEasyIF
Private DataSet As new DataSet[code].....
I though that I know this one... This simple For loop:
[code]...
VB.NET While 1 = 1
Dim localRecv As New StreamReader(localClient.GetStream)
Dim aString As String = localRecv.ReadLine
localRecv.Peek()
MsgBox(aString)
End While
Basically "aString" will keep updating if new data arrives to the server. This way does work, and keeps MsgBoxing every time I get new data, but I don't wanna use While, I need something else, because It won't run any other code, just keeps looping that. :/
I can use the below code snippet to clear the text from each textbox on a form.
For Each ctl As Control In Me.Controls
If TypeOf ctl Is TextBox Then
ctl.Text = ""
End If
Next
But if I want to use it to ensure that all radiobuttons in a group of radio buttons are unchecked then it doesn't work i.e.
For Each ctl As Control In Me.Controls
If TypeOf ctl Is RadioButton Then
ctl.checked = false
End If
Next
I'm assuming it is because the checked property is not common to all controls.
I created this ASP.NET Web application and I can't get the amoritization table(MonthlyPaymentBox) to loop correctly. I think the problem is somehow in my code I am setting the TotalLoan = 0, but I just can't locate where that is happening. I assume this because instead of of starting the current balance at the users input, it starts at 0.
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="WebApplication1._Default" %>
<!DOCTYPE html PUBLIC "-W3CDTD XHTML 1.0 TransitionalEN" "http:www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
[code].....
I tried so many times to convert this to DO UNTIL LOOP unfortunately it does not work properly can you help me?
Heres: the code
CODE:
Basically what i need is for something to look at the items in a list box then compare it to the contents that is in the database. The issue is that the listbox can have more than one of the same item. For instance, LstBox_Order.items(0) could be the same at any position in the listbox. This code works, but it is slow if there is like 10 or more items added.
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My loop that needs to count and accumulate the numbers from a list box does not work. When I debug it reads the first line of the Do While loop then jumps to the code where it would average the numbers. Here is my code:
'calculate average
'get first item in list box
lstListBox.SelectedIndex = 0
[Code].....
Public Class MortgageDetailsCalculatorForm
Private Sub CalculateButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CalculateButton.Click
[code].....
I have two textboxes (TB01 and TB02) and one button (Button1).Then i have written the following [code]I made a loop to get each line and append them to TB02. The strings should be split in three parts (cutt off at the |) so i can later recall them. However it just wont work. I played around a bit but just cant get it to work.
View 7 RepliesI 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] .....
I'm pulling data from my DB, adding it to a DataTable and binding that DataTable to my DataGridView. Before I bind the data, I need to change/remove some data. When I loop through the rows and use a Select Case, just for this column, it doesn't work. But if I use an If, it works fine. [Code] In the example above, the "Pass_Flag" row works just fine, but the "FailureCD" does not. But after the Select, with the If statement, it works. In the example, I'm casting the row as a string first and then an integer. I tried casting to an integer in the select case and it doesn't work either.
View 4 RepliesI have several subroutines which are written in FORTRAN.
1) how I need to compile the FORTRAN subroutines?
2) what I need to do within VB 2005 to call these FORTRAN subroutines within the VB 2005 code?
I have a DLL written in fortran that I know works because I am getting it from a working software package that we use daily. I am trying to call it from anything but am having problems i believe with passing the correctly formatted arguments in and out of it, so i decided to try and access it from a VB program. I chose VB because I have contacted the developer of the software package we are using and he gave me his DLL function call in VB6, even though he is not allowed to show me the FORTRAN source.
Problem is (perhaps, i think) that I am writing in VB.NET, which has different data types than VB6. Can anyone see why i am am having problems. The error i get upon running is: "AccessViolationException was unhandled: Attempted to read or write protected memory. This is often an indication that other memory is corrupt."
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I am running one fortran exe in .net application(calling from command line with the help of system diagnostic process).If we directly click on fortran exe, it shows inputs to enter for fortran in command window, after input entered it gets executed.We want same behaviour but want to run fortran exe from .net application,If we click on button in vb.net form, this exe should get called and should show inputs to enter on the command line, once inputs entered it should execute. How to achieve this with .net application?
Right now, after clicking on button in vb.net form, exe get's opened in command window, but it is blank, and gets hanged.Below is the error forrtl: error (200): program aborting due to window-CLOSE event Image PC Routine Line[code]....
I have 2 source codes in fortrran (I have not written them). I visualized these codes by linking them to VB2005.when I excuate the VB.exe, when VB calls one of these DLLs, there is no problem, but in calling the other DLL, the DLL is executed but the VB.exe is closed and the interface page to the user goes out.
View 1 RepliesI can pass integers, singles, doubles, and arrays of all these back and forth with no problem. But I can't figure out how to pass a string in Visual Basic 2010 to a character variable in the Fortran DLL. I keep getting the PInvokeStackImbalance error. I could just convert the Visual Basic string to an integer array containing the ASCII code for each character, send that, and convert back inside the DLL, but that's pathetic. There must be a simple way to do this.
I first tried using Dim txt(50) as Char in VB2010, and character*50 txt in the DVF F90 DLL but that didn't work.
Then I tried Dim txt as String in Visual Basic 2010 and made the string 50 characters long (also tried 49) but this didn't work.
I could pass a User Defined Type data structure to a Fortran DLL, that contained Short Integers, Singles (real variables) and a series of Fixed Arrays, both short integers and real variables.I am upgrading my VB6 app to Visual Studio 2008 - VB, and I want to keep the same data structures as they are used in about 300,000 lines of code.I modified the Data Structure as follows below, making sure it is of Explicit Layout, since I want the position of all variables to be the same both in VS 2008 and Fortran.Two problems arise:
1) if the LayoutKind is Explicit, such as in the example below (only part of the data structue is shown, where "..." indicate part of omitted data structure members), whenever I try to run my app, I get the following exception message, which indicates that the VBFixedArray declared at Offset 154 is in conflict with some other object, unnamed by the exception handler.
Message="Could not load type 'MyApp.SomeStruct' from assembly 'MyApp, Version=1.32.3906.33480, Culture=neutral, PublicKeyToken=null' because it contains an object field at offset 154 that is incorrectly aligned or overlapped by a non-object field."
Source="MyApp"
TypeName="MyApp.SomeStruct"
StackTrace:[code]....
2) if the LayoutKind is Sequential, the app will start, all the data preceding the VBFixedArrays is passed to the Fortran Dll without problem; everything that follows the VBFixedArray is garbled and unusable. To check this, I have made a Fortran subroutine in the Dll to which I pass both the Data Structure and a vector; in the Fortran subroutine, all the elements of the data structure are equivalenced to individual positions in the vector; upon return from the Fortran subroutine, I compare the elements of the data structure and those of the vector.
The problem here is that the Data Structure contains some 1300 names, and is used extensively in the application, as it is the way to pass elegantly a lot of data pertaining to a mathematical model with only one adress when accessing the Fortran Dll, in which the computing engine lies.
<StructLayout
<StructLayout(LayoutKind.Explicit, Size := 9226, CharSet := CharSet.Ansi)>
Public Structure SomeStruct[code]......
My challenge is to prepare for a presentation using a GUI interface to access a program written in Fortran.The Fortran program reads a data file and then writes an output file.For the presentation I need to be able to change a variable value in a VB form, update the data file, and run the Fortran program from the VB form.I also need to be able to create graphs using VB forms using the output file generated by the Fortran program.
View 2 RepliesI have LaPack numerical package , I want to compile with Visual Fortran (INTEL) using vs2008.I want to use the routines from a VB.NET program.How can I call the routines from VB ?
View 9 RepliesI have a button on a form that is supposed to run an executable (compiled Intel Fortran v11) on the click event. Here is the code:
Private Sub RunButton_Click() Handles RunButton.Click
Try
System.Diagnostics.Process.Start("C: estDir estCode.exe")
[Code]....
I'm certain the path is correct and I have verified that running the testCode.exe from the cmd window works as it should (testCode.out file is updated). When I try to run the process via the RunButton it appears to work...no errors are reported or caught. However, the expected output file is not updated indicating testCode.exe did not execute. All of the online support I have researched indicates this should work.