.net - Dll Reference Count In A Circular Reference Situation In C# 4.0?
Sep 19, 2011
Iam maintaining a large code base I have inherited (ported from vb6 to C#.net 1.1, then to .net 2.0/c# and so on). I have this scenario.My main project references two DLLs - DLL-A and DLL-B
DLL-B references DLL-A. Both dll's and my main project are in 3 separate namespaces.
1) Are 2 copies of DLL-A being loaded in memory ? (dll ref count)
2) How do I find out how many copies of a .net dll is loaded in mem ? (which tool is normally used)
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Jun 10, 2009
I have created a TextBox array where certain cells are assigned a number which I do not want the operator to change either intentionally or inadvertantly.The relevant TextBox cells are identified by their BackColor, (in this case LightBlue)If the cell is changed the original content is immediately assigned to the cell and a relevant message is displayed.My problem is that by changing the value back to its original value I create another TextChanged event and the consequence is that the MsgBox is displayed twice, one after the other.I have avoided the problem by not displaying a message box. The outward appearance is that the TextBox is not changed at all, which of course is my aim.However I would prefer to display a message box.An example of the scenario is shown below.
Another bewildering fact, (to me), is that in the example below, if the check is not made of the BackColor but instead the value of the TextBox the problem doesn't occur
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
If TextBox1.BackColor = Color.LightBlue Then[code]...
In the example above, if in the Text_Changed event handler the 'Remark' is changed from one 'If' statement to the other the differences in the result can be seen.
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Sep 1, 2010
I've got a requirement where I need to calculate a value, however also refer to this value when calculating it. So I've got for example[code]...
I can see how this can be achieved in excel using Circular Reference, however I'm not sure how I go about it when using VB.Net. Is there a similar method to create a Circular Reference as in excel or any other way I can possibly work out the TotalValue?
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Jun 19, 2012
I have a class that is in an assembly due to being required for other projects that I'm currently working on. One class lets call it Class Factory, creates a group of controls which require click event handlers to be attached, I have algorithms which determine polymorphic behavior based on certain features but that is relatively irrelevant.
Due to the event handler having to open up a specific form that isn't part of my assembly, and that form requiring this "Factory" class. Without creating circular reference is there any way I can essentially "delegate" the handler event for the form to define? As a simple work around I have had to maintain two separate classes, one in the project with the form and one in the assembly.
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.Width = 1500
Dim panel As New Panel
panel.Location = New Point(0, 0)
panel.Size = New Size(1000, 200)
[Code] .....
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Aug 22, 2010
I have multiple TcpClient connections to my program. The connections exist as instances of a UserConnection class, that fires events on logon attempt and when receiving messages. My program also holds a Users object, which is a list of a User class objects, holding saved data (username, password etc) for each user that is allowed to log in.
It seems convenient to put a reference object of the respective user, in the UserConnection class (when successful login is verified). Hence, when an event is raised by the connection, the connection object will hold the user reference. As any event handler logic will need to know which user is responsible for the event.
If I don't make a user reference in the UserConnection class, then I need to loop through the users (less than 20) each time, to find the correct user. Not a big deal maybe, but i'm looking to understand how it would be done by an experienced programmer.
When data needs to be sent to a user, I need to access a UserConnection object. Hence the User class also holds a reference to the UserConnection class.
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Oct 5, 2011
Public Class Inventory
Public Property Productcode As String
Public Property lstattribute As List(Of Attribute)[code]....
I have a list of inventory items.I am trying to get the max count of attributelist in the inventory list .I used this code
oLsInventory.OrderByDescending(Function(c) c.AttributeList.Count).FirstOrDefault().AttributeList.Count
But if my attribute list null. The lambda throws null reference.Is there any way to check for null reference in lambda ? Or is there a better way to rewrite the above linq query ?
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Mar 18, 2010
We have a serial port which is connected to hundreds of physical devices on the same wire. We have protocols like Modbus and Hart to handle the request and response between the application and devices. The question is related to managing the reference count of the channel. When no device is using the channel, the channel should be closed.
[Code]...
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Nov 28, 2010
I am receiving this error: Reference to a non-shared member requires an object reference on the code I've
bolded within the code body. Here is my code:
[Code]...
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May 8, 2010
I get this error:Reference to a non-shared member requires an object reference.When i compile on the following code section:
Private Sub statusBarToolStripMenuItem_Click(ByVal sender As Object, ByVal e As EventArgs)
ToolStripMenuItem.Checked = Not ToolStripMenuItem.Checked
statusStrip1.Visible = ToolStripMenuItem.Checked
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Jun 20, 2011
when I do something like this: Process.Start [URL] it says that error only on Form2 not Form1.
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Jul 23, 2009
Error 'Reference to a non-shared member requires an object reference'?I want to know what a non-shared member is.
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Dec 7, 2010
I am opening frmB (variable for FormB - the actual form) from frmA. From btn1 I open frmB like this:
frmB = New FormB()
frmB.Show()
From btn2 (frmB is already open) I bring frmB to the front from behind frmA:
FormB.Show()
FormB.BringToFront().
No problem so far. Now I need to pass an arg to frmB. This is where I am having the problem.
from btn1 (in frmA) I do this:
frmB = New FormB(myArg) '--pass myArg to constructor of FormB -- no problem here
frmB.Show()
then from btn2 -- this is where I have the problem
FormB.Show()
FormB.BringToFront()
I tried placing myArg in FormB.Show(myArg) but that did not fix the problem. What is the correct way to pass myArg to FormB (frmB) in this scenario? Do I need to share FormB or frmB? How do I do this? "frmB" is frmA level variable.
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Sep 22, 2009
why i am getting an "reference to a non-shared member requires an object reference" error on format.Yesterday gets the previous days date and presents it in a yyyyMMdd format.vsettlementDates takes the "Yesterday value and requests data from it.
Dim Yesterday As String = format(Today.AddDays(-1), "yyyyMMdd")
Dim vSettlementDates As String = (Yesterday)
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Apr 27, 2011
I am getting the following error:
Error 1 Reference to a non-shared member requires an object reference. (on WindowsIdentity.Groups)
Here's my code from that uses the WindowsIdentity.Groups property to display the identity references for the groups the current user belongs to. This code is part of a larger example provided for the WindowsIdentity class.
Public ReadOnly Property Groups As IdentityReferenceCollection
Get
Dim irc As IdentityReferenceCollection
[Code].....
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Dec 13, 2009
" GridView1.datasource = _MyUsers.Reference to a non-shared member requires an object reference." error. WHat's wrong with this code
<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
[code]......
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Jul 22, 2011
I have the following code below, how the line where it says : For Each c As councillor In councillorList i get the error: reference to a non shared member requires an object reference. Can someone please advise where i am going wrong? [Code]
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Apr 6, 2012
Alright, so im getting this error:Reference to a non-shared member requires an object reference.This is the bit of code the error is pointing to:My.Settings.Bookmarks.Add(WebBrowser.Url.ToString)Why is it giving me this error?Its saying WebBrowser.Url is the problem.
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Aug 23, 2011
im sure it is something really simple. Im by no means comfortable with VB. The below code is not mine but i have altered it for my needs. However im getting a couple of errors.
Reference to a non-shared member requires an object reference. I have underlined the errors in the code and they all refer to the above description
[Code]...
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Sep 1, 2009
Im trying to create a login page which accesses a mysql database I keep getting this error: reference to a non shared member requires an object reference
[Code]...
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Jan 26, 2010
Can I reference a dll programatically in VB.net? Or change the Local Copy path for a dll reference?
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Dec 29, 2009
How do I fix the following error: Error 1: "Reference to a non-shared member requires an object reference."
On Line:
shortCut = CType(WshShell.CreateShortcut(creationDir & "" & shortcutName &
".lnk"), IWshRuntimeLibrary.IWshShortcut)
Here's my full code sample (if needed for context):
[Code]...
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Jan 25, 2010
I am getting the following error when I call another form from Form1 and fill out the text boxes and Press Ok button. For some reason I cannot access the datatable (dt) from Form1. It gives me the following error: Reference to a non-shared member requires an object reference
[Code]...
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Feb 8, 2010
what is the matter with this
Public Sub showdataset()
For Each dt As DataTable In dsEvents.Tables
Response.Write("<table border='1'>" & vbCrLf)
[code].....
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Jul 7, 2009
[Code]...
I am using this exact code on another form in the same project without an issue, just with a different data source. Any ideas?
EDIT: Never mind, seems like it was a stupid naming scheme and VS was adding a bindingsource with a different name than I wanted.
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Feb 8, 2012
I have two forms form one have one listbox and one checkedlistbox and form2 have only checkedlistbox
on form one checkedlistbox is being updated by listbox_SelectedIndexChanged.
how can update checkedlistbox on form 2 when listbox_SelectedIndexChanged on form1
when i use form2.checkedlistbox.BeingUpdate()
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Mar 4, 2011
I am getting this error for Login.Show() here:
Imports Microsoft.VisualBasic.FileIO.FileSystem
Public Class Update
Public Sub CheckUpdate()
[code]....
I am also getting this is every other form when using the Login form, along with Login.Close(), and Login.Hide(). I haven't tested any other ones.
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Aug 11, 2009
I have added one class under namespace BusinessLogics. I have inherited System.Web.UI.Page to class and showing error as 'end expected' in
System.Web.UI.Page
Namespace BusinessLogics
Public Class BllUploadImages Inherits System.Web.UI.Page
End Class
End Namespace
How can i remove my error.
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Jun 28, 2009
I'm getting this message in the IMMEDIATE window when I try to look at the value of public variables from my main form.[code]Reference to a non-shared member requires an object reference.But it steps into the IF statement without error - so the boolean is TRUE.
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Jul 13, 2011
i'm using this add reference of a certain software to the libraries of VB it doesent work.i just recently notice that the zenon. application. projects. item("fdgdgd"), give this coment "reference to a non-share member requires an object reference"
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Jan 19, 2012
This is the first time I made a DLL file (talk about being obsolete). So I made this dll file containing all functions I need for Input Handling, I named the file "CommonTools" and added an "InputHandling" Class on it... I then created a new project, added "Common Tools" as a reference and made this code for my main form to test it:
[Code]...
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