.net - Why Doesn't SendMessageTimeout Update The Environment Variables
Feb 11, 2011
I have an installer, and it installs some native dll's along with the program.The dll's are in a separate folder, which I added to the path environment variable.That was done successfully, and the variable shows up in path if I check the windows system settings.
However, if I start the command line program/service, it says dll's not found...I check the environment variable path with the set command, and my folder is not in there.If I do
SET path = %path%;my/folder/here/
And start my program after that, then it works.According to this MS KB article this is because the computer would need to be restarted.unless I do
SendMessageTimeout(HWND_BROADCAST, WM_SETTINGCHANGE, 0, (LPARAM) "Environment", SMTO_ABORTIFHUNG, 5000, &dwReturnValue);
Now I did just that, using the below code, but the error message persists. My folder in %path% is correctly spelled, I checked that.
' http://www.pinvoke.net/default.aspx/Enums/SendMessageTimeoutFlags.html '
<Flags()> _
Public Enum SendMessageTimeoutFlags
[code]....
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Jan 9, 2009
We have a couple of applications at work that need a reference to the license server set in the User Variables under the Enviroment Variables on the windows xp client machines(system properties, Advanced, Enviroment Variables). The problem is that both applications needs a reference to the same variable name and you can't have two with the same name. What i intend to do is to create a simple windows application with a button for each application that deletes the variable item present, adds a new variable item with the value needed for that application to be able to run and then run the application itself. This is just a temporary fix until we get a more permanent solution. The 'GetEnvironmentVariable' class in vb is not able to add or delete a item, maybe the WIN32 API could do the job.
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May 8, 2010
I wanted to know if its possible to use VB.Net to create a USER Variable in the Environment Variables of the Operating System.
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Aug 9, 2011
I am looking to read a text line from an ini file which may contain strings like %systemRoot% or other environment variables. I was able to write small function to parse such strings as long as it appears only once in the path. for example my fuction can parse %systemroot%system32 and return c:winntsystem32.however if the string contains %systemroot%\%username% i am not sure how to handle that.
[Code]...
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Apr 13, 2011
Below is the code i am using to read and update the system environmental variable. This code is working fine when i am executing .exe on Local Machine. I am getting problem when i try to access this .exe from Browser(using citrix i am doing this) and invoke. when i invoke from browser its going to catch block and displaying MsgBox("Unable to Create LDAP Key.
[Code]...
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Aug 16, 2010
I wrote a DLL a year or two ago on my old computer that worked well for a long time. I moved on to other things, then came back to it recently and discovered that the code doesn't run on my new computer. The problem seems to be with this line: [code]
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Nov 14, 2010
This was my code .
Private
Declare
Function addelements
Lib
[Code].....
meeting the requirement i.e procedure to set environment variable and use/get that in my code. make necessary changes in my code accordingly.
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Jan 26, 2012
I need an API for sendmessage and sendmessagetimeout for my VB .net application. I have searched quite a bit, and everything I find doesn't seem to work: either the message just doesnt seem to be sent, or the message appears to be sent with the msg parameter always 0, and the wparam setting as what I enter for the msg setting. Pinvoke's also always seems to throw an AccessViolationException for I have no idea what reason. I tried playing around with maybe just where I put the variable, but unsurprisingly, there is not a simple logical switch of the variables.I have tried pinvoke's:
<DllImport("user32.dll", SetLastError:=True)> _
Public Shared Function SendMessageTimeout(ByVal windowHandle As IntPtr, ByVal Msg As Integer, ByVal wParam As IntPtr, ByVal lParam As IntPtr, ByVal flags As
[code].....
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Feb 18, 2011
I am using an update panel and when I click a button it will update all the panels. updapanel1.update() is very simple, but my data is not updating unless I hit the button twice. My gridviews shows data for a selected user, and then all the grids reflect that users data. works fine all the update panels work for the gridviews. Now for somereason when i try to do a row count and update the panel with the summary, it does not work, i get either the previous users summary or if i hit update again for the same user i get the correct data.
[Code]...
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Jul 21, 2010
I have a gridview that is set to a sql datasource, it is generating the columns automatically. If I add a column to the table it is referencing, it will draw that column and display it, but it does not update the insert/update commands to include the new column. Is there any way have it rebuild those commands automatically?
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Nov 5, 2010
Public Sub UpdateStaff(ByVal sr As StaffRecord)
Dim oldSr As StaffRecord
Dim q = From staff In db.StaffRecords Where staff.Employee_Number = sr.Employee_Number Select staff
oldSr = q.First
oldSr.Address_Line1 = sr.Address_Line1
[Code]...
The helper function I have written seems to do everything I want apart from update the db. Stepping through the code, the oldSr is updated by the new sr parameter but no update on submit changes.
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May 27, 2010
[code]The query executes fine but the problem is that when this query executes, it doesn't update the percentage field. What might be the problem?
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Jun 22, 2012
I am trying to launch a third-party program from my own. I have done a quick search in Program Files and Program Files (x86), and I just realized that the path returned by getenv("ProgramFiles") actually depends on whether I am running in x64 or Win32.How can I search (both in c++ and c# or VB.NET) both Program Files folders, using environment variables and not hard-coded names - since regardless of the version of my program running on the user machine, he might have the other one installed in a different version ?
My code now: in c++:
fs::path root_directory = fs::path(getenv("ProgramFiles"));
// and then I change to
root_directory = fs::path(getenv("ProgramFiles(x86)"));
in VB.NET:
System.Environment.GetEnvironmentVariable("ProgramFiles")
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Dec 8, 2011
I have the following class which I want to serialize to XML:
[Code]...
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Oct 20, 2009
I have a button inside of a gridview's template field. Onclick i want to the button to open up a modal popup while force updating the updatepanel and formview inside the modal popup because the formview's datasource depends on a hidden field in which i am setting after click also.
[Code]...
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Dec 15, 2009
I have VB6 Dll which I am referencing in vb.net ,I am calling the following function in it. It working fine in developemnt environment but not in deployement environment.
Error Method not found: 'Boolean MyUtils._MyUtils.LoadMyObjectRecords(ADODB.Stream ByRef, System.Array ByRef)'.
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Oct 12, 2011
Whenever I build my VB.Net project, the Assembly version does not automatically update as it is supposed to with the * in the third box in the Assembly Information. The only way I have found to (sometimes - it doesn't always work) get the version number to update is to Clean the Project, remove the *, Rebuild, reClean, put the * back in, and Rebuild again. What could be causing this issue to happen?
I should note that my coworker reports no such issue on his machine when Building the same Project; also, I must admit to some confusion on my part as to how this behavior is even possible, given that the error persists even if I remove every possible intermediate file I can think of that could possibly even be carrying the old version number, so how does it even know the old version number?
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Oct 24, 2011
I'm doing a form to add/edit/delete values from a data catalog. everything goes fine but the Radgrid doesn't update after Submit Button is pressed in the edit/new dialog. i did it before in a more complex form but i can't figure exactly what's wrong.
in the update the data where the new data will be overwritten dissapears after postback. (i have a way to solve this)
mnlib is a library of my authorship to deal with common tasks i know that queries with strings like {$database_name} is not a standart practice, and probably is not recomended, but i have to deal with it . i'm doing almost everything programatically some of the code is ommited because character limit in post Updated: Reduced code, i'm afraid if keep reducing code, i will eventually delete something important to the iusse
ASPX file
<%@ Page Title="" Language="vb" AutoEventWireup="false" MasterPageFile="~/Templates/2Cols.Master" CodeBehind="lstCat.aspx.vb" Inherits="adquisicioneNET.lstCat" %>
<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
[Code]....
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May 14, 2011
I'm trying to update my database, I'm using access 2003, my problem is that for some reason I can update the first row but when I try to update any other rows after that I keep getting an error saying Column 'ProductID' is constrained to be unique. Value '7' is already present.
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Jan 3, 2011
Now it updates when I press the update button and then it displays the data like it has updated the database, but when I close the program and run it. It displays the data as not updated WHY DOESN'T THE DATABASE UPDATE?Same with the Add and delete commands, I've almost finished my program but there's always a problem :...
Dim StudentID As Integer = Me.Lst.SelectedValue
Dim con As New SqlConnection("Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|StudentTeacherDB.mdf;;Integrated Security=SSPI")
[code]....
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Feb 17, 2011
I've come across some strange behavior. I have a control that binds to a property like so:
<HyperlinkButton x:Name="ProjectBeheerLink"
Visibility="{Binding IsBeheerder, Converter={StaticResource VisibilityConverter}}"/>
In my viewmodel I have the property implemented like this:
Public ReadOnly Property IsBeheerder As Boolean
Get
Return iwtApp.AllMyFunctieRollen.Any(Function(x) x.Rol.Equals(Constants.RoleBeheerder))
End Get
End Property
Then when I raise my PropertyChanged event in my callback method
Private Sub GetMyPersonCompleted(ByVal lo As LoadOperation(Of FunctieRol))
'Init FunctieRollen ect. ...
RaisePropertyChanged(Function() Me.IsBeheerder)
End Sub
my binding does not update. However! If I implement a backend field like this:
_isBeheerder = iwtApp.AllMyFunctieRollen.Any(Function(x) x.Rol.Equals(Constants.RoleBeheerder))
RaisePropertyChanged(Function() Me.IsBeheerder)
And change my property like this:
Public ReadOnly Property IsBeheerder As Boolean
Get
Return _isBeheerder
End Get
End Property
Everything works fine...
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Sep 1, 2009
I'm not sure exactly how to describe this. In VB6, there was a Timer command. I could create a variable of type Timer and loop until the current value for Timer exceeded the initial plus a given amount of time. This allowed me to update form variables while the timing loop was executing. How can I do something similar in .NET?[code]...
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Jun 12, 2011
I am trying to figure out how to use variables to define which object to update. I could of course use a case statement to pick the object based on a variable, but it seems to me like there should be a more direct way. Here is a smaller example of what I would like to do.In my form I have 4 picture boxes (pbox1, pbox2, pbox3, and pbox4). I then want to change the image in one of the boxes, but the box I want to change will be determined by a variable (say maybe a randomly generated number). Is there some way to dynamically concatenate the "pbox" with the number that VB would understand it and use it as an object?In this example I could easily build a case statement to handle the selection, but in my real program there will be many more than 4 options.
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Oct 9, 2011
I am having a problem with visual studios 2010. I am creating ASP.net pages, but when I test/debug my code, the code-behind files runs the same code that was run the first time it was debuged this session. Meaning, to test new code-lines, I have to restart Visual Studio altogether?
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May 17, 2011
If I bind an BindingList(Of FooBar) to the datasource of my datagrid the controls gets updated whenever I add an item to this BindingList.[code]...
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Nov 29, 2010
I have a form called 'Bookmarks' that loads a bookmark file that contains a single word on one line. I have put buttons on the form for sorting this list, deleting items and changing the character case to lowercase, uppercase or Sentence Case.Now, deleting and sorting the list works fine, but when I try to change character cases,nothing happens. I started the debugger and found that my case changing code does work, but the listbox doesn't seem to update it's contents.I tried listbox.Update() and listbox.Refresh() but that didn't work either.
Here's my code for 'Set Case':
Private Sub setCase_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles setCase.Click
If bookCase = "default" Then Exit Sub
If bookCase = "lower" Then
[code]....
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Jan 14, 2011
So, I'm working on a simple game in Visual Basic, and I have 2 labels. One named "pointsLbl" and one named "pointsleftLbl":
pointsLbl.Text = "Points: " & points
pointsleftLbl.Text = "Points left: " & pointsleft I also have two integers, one named "points" and one named "pointsleft". The problem I'm having is that when the point boost button is pressed, the labels don't update and also don't show the new points and new points left. Private Sub boostBtn_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles boostBtn.Click
[Code]...
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Nov 22, 2011
how to use multithreading. Still don't know what i am doing wrong in the code below i don't get any errors it just doesn't update the rich text box (frmArmaghRecords2.rtbOpenArmaghFile3).
[Code]...
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Apr 14, 2009
I am using Visual studio 2008. I didn't see a place to post questions about this . I am creating a mobile application, at run time the executable itself is not updating to show the changes from source code i have written. I feel there must be a setting or something in visual studio .
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Nov 12, 2010
I have an editable datagridview that's been databound with dataadapter and datatable, and a normal button on a form. When i edit the dgv's cells and click the save button it fires the datagridview_cellvalidating event and if the cell validation is correct it updates and saves the current record to the datasource. Also, before save it commits change in any cell under editing. But when I use a toolstripbutton to do the same work, though it saves the dgv records but doesn't update the current change i.e. it saves the old records that are being fetched when the dgv was populated first during form load. Also, clicking the toolstripbutton doesn't fire datagridview_cellvalidating, datagridview_rowvalidating etc events. What it seems to be is it's not committing the change in any cell under editing. [Code]
Why isn't it happening and how can I make it work? how can I fire datagridview_ cellvalidating, datagridview_rowvalidating and other events; and commit cell value change by clicking toolstripbutton.
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