Way To Invoke Standard Network Credential Prompt At All?
Jun 29, 2010
I'm struggling to find a way of prompting the user for network credentials within a VB.net application. I appreciate I could use the login form, but I'd really like to be able to use the standard Windows UI prompt.I want to use the same credential prompt as you get when you try to access a server using UNC e.g.\servernamec.This is easily possible in Powershell using the get-credential cmdlet. The closest I can find is using the Powershell assembly PSHostUserInterface.PromptForCredential method, but I cant get this to work in VB.netIs there any way to invoke the standard network credential prompt at all?
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Jan 31, 2011
I dont know how to invoke a cmd prompt from vb.net window. from the vb.net i have tp ping an ip adress of a system in the cmd prompt.
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Mar 16, 2010
I've got the following code:
[code]...
The problem is that, when I call the "SetStatusBarText" sub from another thread, InvokeRequired is True (as it should be), but then my threads stall on the Me.Invoke statement - pausing execution shows them all just sitting there, not actually invoking anything.
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Dec 15, 2011
I build program to launch application(launch application can as local profile or can as network credentials) using Advapi32 "Create Process WithLogonW".but I got the problem, I can't capture message of standard output(Stdout) and Standard Error(stderr).could everyone help me how to capture message and the code?
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May 27, 2009
I usually use standard button and do the settings like causevalidation etc if required.
i decided to use toolstrip and inserted some buttons but end up that it doesn't do the validation for control and also doesn't call leave event of textbox control.
so my question is, anyway to use regular button functionality for toolstripbutton or there is a way to add regular button on toolstrip.
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Sep 26, 2011
Is it possible to create a credential for RDP using VB 2010?For example, to do this using win7 GUI:
I go to credential manager and choose add a credential. I then enter TERMSRV/myserver and enter user name and password.
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Jul 9, 2009
I've been trying to develop a VB application which retrieves a lot of information from an XML file on our secure intranet. So far I've been using...
Dim request As WebRequest = WebRequest.Create(xmlUrl)
request.Credentials = New NetworkCredential(username, password)
Dim response As WebResponse = request.GetResponse()
Dim str As Stream = response.GetResponseStream()
Where username and password are predefined. What I need is a way of utilising the Windows credential manager to handle this. Ideally, I like it to pop up a credential prompt at application start, and then store the credentials for later use. So far so easy, but I want to be able to use the tick box to save the credentials back to the store, so taht next time the application is used, they are already filled in.
So far I've been investigating the CredentialsDemo from MSDN, but have been unable to adapt the routines to a web request from the given example of a SQL request. In fact I've not even been able to get the demo working adapting it to my own SQL server!It utilises the CredUIPromptForCredentials function. Is this the right way to go? Or am I barking up the wrong tree?
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Jul 13, 2009
I registered a domain and created a (Windows) web site via [URL].I created a simple Hello World web service using VWD 2008 Express. I have no idea why it put the web service into the stats folder, but that is a different issue.If I type [URL] into the address bar of my IE 6, I am prompted for user name and password, which I enter. I get a page listing my web services (Only one: HelloWorld) and other information. If I click the HelloWorld link, I get the appropriate response.Bottom line: the web service uses SOAP and it works.
However, if I create a Windows application (vb) in Visual Studio 2005 to use the web service and try to connect to that same address (Add Web Reference), I get asked:"The server needs to authenticate your request. Your credentials will be sent to the server in clear text. Do you want to continue?" I click yes, and I see a Discovery Credential dialog box. It asks for 4 things.
1)Url: (The same address as above already filled in)
2)User name: (I enter my user name)
3)Password: (I enter the password)
4)Domain: (I enter mydomain)
Of course "mydomain" is a standin for the real domain name I typed in.I click Ok. The information apparently is rejected and the dialog appears again.What can I do to make this work. The web site has IIS 6 with front page extensions. This is shared hosting and I do not have access to change anything about the IIS settings.
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Jan 27, 2011
Is it possible to create a credential for RDP using VB 2010?For example, to do this using win7 GUI:I go to credential manager and choose add a credential. I then enter TERMSRV/myserver and enter user name and password.
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Aug 27, 2010
I have a filesystewatcher object. On it`s event it runs a procedure which fills a treeview with a data. I had problems with treeview methods, but when I run them using invoke method everything is ok. But I still have one problem. When I load the form for the first time, everything works fine. But, when I then close the form (me.dispose, me.close), and load it once again, when Filesystemwathcer start the procedure i have an exception "invoke or begininvoke cannot be called on a control until the window handle has been created" trying to run a treeview.invoke method?
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May 4, 2009
Turns out this impersonation with .NET's security only allows application-level access. Since the COM object is at the system level, the impersonated user still cannot instantiate it. I figured this out by right-clicking the executable and selecting "Run As...", the program functioned fine. I found out that launches the program with system access (assuming the user you are running it with has those credentials).Now I am in the process of creating an external program that will launch this application using this method.
[Code]...
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Apr 10, 2009
What is Platform Invoke Service (P/Invoke)?
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Mar 11, 2009
I am trying to add a TabPage containing a UserControl to a TabControl at runtime, because the number of TabPages to add are determined at runtime.
The UserControl (objDataInfo) is just two Textboxes, two labels and two Radiobuttons, nothing too exciting...
The TextBoxes have their Anchor properties set to Left, Up, Right so they scale with the width of the usercontrol.
The TabPages are added in the constructor of the form, which takes the number of tabpages to create (n) as an argument:
vb.net
Dim cList As List(Of objDataInfo)
Public Sub New(ByVal n As Integer)
[Code]....
So... How can I get the standard BackColor of a standard TabPage?
(I tried leaving out the usercontrol all-together, but the TabPage still has a gray background...)
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Oct 13, 2010
We have a UI with a progressbar. I know how to invoke, safely, the control from which it was not created from a thread. there are threads being processed in a threadpool, all of which calls an "agent" (which is a notifier to raise an event back to the UI to then increase the progressbar). an "agent" is set as a property in a State object, which is then passed into a method which will be executed on the ThreadPool. so, I invoke on the UI the method to update the progressbar, but the bar does not seem to update at all (screen frozen) and it takes a very very long time for it to execute. without threading, no problem.
[Code]...
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Aug 18, 2009
Here is my idea so far: I have a bunch of computers connected in a local network. One of them is a MySQL server, one will have a vb.NET program wich will act as a "second server" and the rest will be different clients. What I want to do is that the "second server" will send out some kind of message or network package to some of the clients in the network, and they will execute a code based on what message it is, or what kind of package it is. I'll give you a simple example:
[Code]...
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Mar 11, 2011
I have a program which I am securing with a Username and Password box, in which the user enters their credentials. In the database, the username is a number field (VB would not accept this as a string and was looking for it as Int32). And the password is a text field. I have the form linked to the database by an OleDbConnection with a DataAdapter (DaUser) and DataSet (DsUser). I am using a datarow which I have declared at the top of my code i.e. Public drUser As DataRow. The problem arises when the user enters their username and password.
The following code searches the primary key row of the database (Username)
drUser = DsUser.Tables("User").Rows.Find(txtUsername.Text)
When the Username entered does not exist, I'm getting this error when trying to display on the form the users email:
NullReferenceException was unhandled - Object reference not set to an instance of an object.
I've tried both if statements and try/catch to basically say if the Username doesn't exist... display an error message etc.
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Feb 15, 2011
I am building a simple intranet site and want to get the employees user name, but when i use Request.LogonUserIdentity.Name , i keep getting the servers credentials and not the users. what am i doing wrong and is there a better way to do this.
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Jul 15, 2009
1) Can anyone post a link or tell me the differences between these versions of VISUAL STUDIO please? >>
Standard, Professional, Team Suite, Team Foundation Server Standard & Team Foundation Server WorkGroup Edition
2) I imagine Team Foundation Server WorkGroup Edition is the most expensive and therefore has the most functionality?
3) Are there any others I have not mentioned?
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Nov 18, 2011
I have a .NET 2.0 *.dll that calls My.Computer.Network.Ping(). The *.dll is then run out of an *.exe via AppDomain.CreateDomain() and Invoke(). The problem is that this works just fine under Windows XP but under Windows 7, I get an exception saying that no network connection is available. I tried the Ping() call out of a small console application under Windows 7 and it works just fine.
[Code]....
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Mar 26, 2012
I am writing some code as part of a framework for opening a file.The file is of custom type and should not be opened by more than one instance of my application. To stop multiple file opening I use a filestream to create a lock file and then keep said filestream open. This seems to work in preventing another instance of my application from opening the file ( as it will fail in recreating the lock stream in the files open code ) but if the file is on a network share and the network drops then the original application also can not access the file any more.The code to get the lock stream is as follows:
Try
' We need to keep this stream alive to prevent other applications gaining access to the lock
mLockStream = New FileStream(mLockPath, FileMode.CreateNew, FileAccess.Write, FileShare.None)[code]....
In this I create the lock stream the first time round and then if another application tries to create it, it throws an exception and stops them from getting any further. This is kind of how it needs to work, unfortunately as I said, if this is done across a network and then the network connection is dropped for some reason then I can not delete the lock stream as I get an IOException telling me a process cannot access the file as it is open in another process ( which shouldn't be happening I don't think).
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Jun 22, 2011
I have a problem I want to make a server and client where the server is password protected and will make the client display files/folders in a designated folder which will be in the server's current directory and the client will ask what IP and password to connect to and if the password is correct is allows the client to access the files/folders in that folder in C.D. of the server and the client can download any file within the folder by clicking a button, yet don't even know where to start.
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Oct 12, 2009
how do i create dll application in vb.net? how do i call a dll application from an exe application?
using VB.NET, is there sample code where an exe application invokes a dll appliction?
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Mar 5, 2009
Is it possible to execute some sort of code to determine whether or not it's a good idea to call Invoke? I dunno what you would do once you'd found out you can't but it could be useful for detecting some dead locks (like the one I have a the moment).
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Nov 11, 2009
Public Class StateObject
Public workSocket As Socket = Nothing
Public Const BufferSize As Integer = 1024
Public buffer(BufferSize) As Byte
[CODE]....
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Oct 5, 2009
So, I don't want this to get into a flame war between C# and VB.NET developers. This is purely from a standpoint of a development department going forward. We've been a VB.NET company for years, but that was mainly due to who we've hired. That requirement has fallen off the wayside as of late, as we've pulled in 2 guys who specialize in C#. I used to be a C++/C# guy before converting to VB.NET for this company.
So, to everyone who has to deal with this whether on a hiring basis or a maintainability basis: how do you handle standardizing languages of choice going forward? I'm inclined to make a push for C#, as that'll make 3 solid C# developers here. But just curious what everyone's thoughts on this are.
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Jan 23, 2012
I have the HTML Help Workshop, and I can create a .chm file. When I add the file's name as a help file in the Project Properties form, pressing F1 invokes I also have a help menu item (which has F1 as a shortcut key), but clicking on the item produces no response. When I created the help menu item, VB generated stub SUBs for mnuHelp_Click() and cmdHelp_Click(); what code do I add to the SUBs to bring up the help file?
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Apr 19, 2009
Alright, all I want to do is submit a form on this website.The program is simple enough - automatically logs me into the site.For reference; the website is ( url.. )I know, the game is lame..
Anyway, I have already figured out how to fill in User/Pass fields.But I am having problems understanding how to access the Login button.It should be simple, but the button itself is not assigned a name at all.Here is the only information given on the button itself [code]...
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Oct 9, 2009
I have written a class that handles my socket information, which means i need to raise events back to my form class using a delegate. But for some reason the following does not work: -
Public Class Form1
Private WithEvents objEthernet As Ethernet
Dim Eth As New Ethernet
[Code]....
Both of the Disconnected and connected events fire and are working from my socket thread but when i call "CallPassData" i get the following error "Invoke or BeginInvoke cannot be called on a control until the window handle has been created"
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Jul 24, 2008
On creating a new project in Visual Basic 2008 Express Edition (Version 9), where you get to choose a template, I can't find Standard EXE anywhere.
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Mar 24, 2010
How can i make it so vb can run a cmd prompt and all the output will be displayed in textbox1.
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