What's the difference between using the in out attributes in a interop method call such as SomeWIN32APICall(<[In],Out> Byval SomeVariable as SomeType) Vs SomeWin32APICall(ByRef SomeVariable as SomeType)? When I use the latter my app crashes.Edit: Fixed Typo
View 1 RepliesI just need to know what is the slight difference between them so I know which one to use everytime.
View 5 RepliesI have a .NET winforms app that automates Excel and checks for a worksheet password. The requirements are to be able to detect
1) that the protection is turned off
2) that the password is removed (protected but there is no password)
3) that the password matches the correct password from a database
To meet the second requirement the program calls the Worksheet.Unprotect command with a null string, capturing the error. If error as expected, the 3rd check is made. If no error, then the Unprotect worked without a password ==> password was removed.
The code sample below has these checks.The application can do this fine with Office 2003. I have since had my dev machine updated to Office 2007 and it no longer works as it did. When I call the Worksheet.Unprotect, Excel prompts for the password!
I need to know how this should be accomplished in the new version of Excel or if there is a way to reference the old PIA. No matter what if I set a reference to Excel 11 it is replaced with the PIA for 12 in the GAC.
'return true if unprotect of worksheet does not generate an error
'all other errors will bubble up
'return false if specific error is "Password is invalid..."
Try
[code].....
I want to invoke a method on a class that i have a reference to. The method that I want to call has a custom attributes. Currently I can find this attributes and call the property of my class Attribute.
is there a way to invoke that method ?
PS/ The project is written in vbnet, but I think the solution is the same in c#.
Does calling the Dispose method on a Windows.Forms.Timer call it's Stop method? Or should I stop the timer before I dispose it?
View 5 Replieslike an Interop user control (VB.NET) to return and to accept multiple values from a get/set call. I assumed a user defined type (UDT), would be the correct way but I keep getting a "Variable uses an Automation type not supported in Visual Basic¯ from the VB6 compile. How is passing multiple values between an interop control and the VB6 application done?VB.NET (Interop) code, a control with a .NET ListView
Structure Employee
Dim Firstname As String
Dim Lastname As String
[code].....
I am new to C# and trying to convert a VB.NET app. Using this code:
[Code]...
I will try to explain what I need.Let's say that I have a class like this:
Public Class Example1 Public Sub ToBeCalled()
[Code]...
I have a Application that Crypts all Files in a Directory and the Subdirectories
Public Shared Sub CryptAllFiles(ByVal crypt As Object)
'check if this dir exists
Dim vDirInfo As New DirectoryInfo(vPath)
If Not vDirInfo.Exists Then Exit Sub
'get all files' sizes in current path
[Code]...
I'm trying to call this code in VB.NET with "option strict on":
Dim application As word.Application = New word.Application
application.WordBasic.DisableAutoMacros(1)
The WordBasic object is dynamic, there is no type library available.Now the compiler will complain, because late binding is not allowed.
Trying to replace Cells(RowIndex,ColumnIndex).Value() calls by row-wise references for performance, I permanently fail at referencing the result. Starting with Excel Interop - Efficiency and performance, which contains the tip to use get_range, i.e.
//get values
object[,] objectArray = shtName.get_Range("A1:Z100").Value2;
iFace = Convert.ToInt32(objectArray[1,1]);
//set values
object[,] objectArray = new object[3,1] {{"A"}{"B"}{"C"}};
rngName.Value2 = objectArray;
[Code]...
However, referencing Values with two dimension indices always returns an "index was outside the bounds of the array" exception. Inspecting the array with the debugger shows a nice 2-dimensional array which should has 17 elements on the second dimension, so Value (0,0) should indeed be a valid reference -- but it isn't:
The debugger lets me inspect Value, I can also drill down to Value(0,0) and see the correct value, but re-evaluating just that element, i.e. inspecting "Value (0,0)" returns above message.
i want to which way is better when concentration is on processing speed. i want to call a method that compute some data that method is on another form in my windows form application then what you prefer is better way 1) to call that method in another form and use returned value or create similar method in form where it is required.i want to make it's processing fast.
View 3 RepliesDo you really need this keyword to overload methods? What is the difference between using the overloads keyword vs. just having different method signatures?
View 5 RepliesAssume I have a function: Protected Sub UploadFile(file As String)
End Sub Then I can do the follwing
UploadFile(file)
But I would like to do this: file.UploadFile()
Looks like Im missing logic in here, but still - is it possible to make dot-like notation?
I have a class that runs as a thread. While the thread is running, I want to call a method in that thread. I do this commonly where a thread calls a method in the GUI with a delegate. But I'm confused how to do this when the called thread is not the GUI and there are no parameters passed to the called method.
View 8 Repliesmay I just ask a seemingly simple question for which I can't find any solution throughout all the VB.NET documentation: I have to call a (non-static) method of another object (instance!) based upon the name of the method (given as a string).
View 1 RepliesI have a Form1 with a method called OrdreUpdate2 I try to run thad method from another form by using the command Form1.Ordreupdate2 in a buttonclick.
But nothing happens..What am I missing here?
I have a form and I am calling a method from a module in that form. However, how to do i call the object into the method, since Me doesn't work.
Example:
in the module:
Function printname()
Console.WriteLine("Form called with is titled:" + me. text)
[code]....
In VB .NET, when you create a user control class, you have the obligation to call the sub InitializeComponent within the constructor.If you don't you'll a warning message like this: [code]What is the mechanism used to raise this warning? Is it something I can reproduce for my own functions?
View 1 Repliesi have a problem i use a call sub procedure to do a delete records in my database for my vb .. now i have a problem when i call my sub delete proceudre in like this call GetDelete("tblName") , but in the sql query the sysem declare like this delete * from 'tblName' in my sub procedure when i set the breakpoint in which cause an exception error "Syntax error in query. incomplete query clause " anyway how to delete the quotes so i can retreive it without error
View 2 RepliesIs it possible to dynamically load a .NET DLL and create an instance of a class inside it? I will know the name of the class.
View 5 RepliesWhen should I call the Flush() method (TextWriter.Flush() / StreamWriter.Flush() / BinaryWriter.Flush() / etc) ? Should I call it everytime I finish writing a stream?
View 3 RepliesI have a method written in VB.NET. It looks like this:
Shared Sub SomeMethod(ByVal Id As Guid,
Optional ByVal str1 As String = "foo",
Optional ByVal str2 As String = "")
I want to call this method from C# 3.0 and I want it to use its default arguments. I tried passing System.Reflection.Missing.Value, but I cannot cast it as String. Is there any way to do that?
I want to calculate the time taken by a method to execute.[code]...
View 11 RepliesI have a C# dll and want to use it in VB.NET. I'm using C# 2008 Express and VB 2008 Express. I have added a reference in a VB project to the C# dll. When I create an instane of a class in the C# dll, it gives the following error messsage: "Type 'RF.RabinFingerprint' has no constructors". My C# dll code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;[code].......
I have a method called ADD in a class that connects to a database. The database class name is XDB. I also have an object named XXX in it's own separate class with properties.One of the instructions for the Button named ADD click event is:
'Call Add method passing in the XXX object
So this is how I coded:
'declare a variable X as an object instance of XXX
Dim X As New XXX[code].....
I know it's wrong since it doesn't add the XXX and the form doesn't close but I don't know what I'm doing wrong.
REF: http:[url].....The above reference is where I got the code below.This code adds buttons to Form1. When a button is clicked a messagebox appears stating what button was clicked. I want to have the ClickHandler fill a RichTextBox on Form1 (I added a RTB to Form1). My problem is I can't do a Dim xForm As New Form1 to fill the RTB from the ButtonArray Class. I can place my file's text in a MessageBox so I know the code I added is correct. I also tried placing a Property method on Form1 and using a Accessor to fill the RTB, however it also requires Dim xForm As New Form1. How can I get my data from files to the RichTextBox on Form1 from the ClickHandler in the ButtonArray Class? See ButtonArray Class Below.
Imports System.IO
Imports System.Text
Imports System.Collections.CollectionBase[code].....
I am trying to call a method which has two parameters using thread. How can I do this? If I pass parameter to my thread.start() method, it is giving error.
View 1 RepliesI am new to Silverlight, but am up to my ears in some of the more intermediate/advanced stuff.
I am using MVVM, in Silverlight 5.
I have a view (we'll call it ComboView.xaml). It has a ViewModel (we'll call it AwesomeVM)
The view contains the ViewModel, declared in the page's resources like so[code]...
If I have a string that contains the name of a control is there a way to call that control's click event?
Dim a as string = "MyButton1"
Now I want to call MyButton1.Click Method or MyButton_Click Event using the contents of a.