Inputting Login Info That Doesn't Exist In The Database?
Dec 4, 2009
In this code block, the datarow gets the row number of the username that was used to log into the system with, right? And in this code, if there is a username/password that was matched with in the database, it'd place it on the dbUsername/dbPassword variables and compare it with the ones that were inputted by the user.What if I wanted to know if there is none of that username (like, username doesn't exist from the database)? I tried inputting login info that doesn't exist in the database and it resulted into the following error:An unhandled exception of type 'System.IndexOutOfRangeException' occurred in system.data.dll
[Code]...
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Jun 7, 2012
i am trying to make a login screen that is connect to a database(NOT MS ACCESS).i keep geting an error when i try geting it to conect to the database
"Value of type MySqlData.mySqlClient.MySqlDataReader cannot be converted to System.data.OleDb.OleDbDataReader
At rdr = MyCommand.ExecuteReader()
dose anyone know whats going on
[Code]...
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Apr 23, 2012
I want a Code to check Database exist in SQL and Message Box Show Database Exist Yes/NO?
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Jun 10, 2011
I have a login form with username and password authentication . It works fine. But I want to give option to remember login info option in the form.
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Jul 16, 2010
I want the oppisite of
If My.Computer.FileSystem.FileExists() Then
end if
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Jul 17, 2010
I have a Windows Form in which I started two threads and then close the form and threads continue their works. How can I abort first thread when the second thread stops?I made the first thread IsBackground,but the second thread is not the only thread of program and the first thread is started in another thread(form) that is closed and not exists anymore,in addition I can't set Flag of a Class that doesn't exist.
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Jul 4, 2009
I have been trying to build the "Testing a class lesson, but the Set as StartUp Project line in the Project menu does not exist! I have redone the entire project 7 times, always the same response! # different computers, all with registered versions of VB. Why does this problem persist?
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Nov 1, 2010
i read that WindowsFormsApplicationBase, is in the Microsoft.VisualBasic.ApplicationServices namespace
Do I have to really add the full-blown Microsoft.VisualBasic.ApplicationServices just to get WindowsFormsApplicationBase in c# ? What's the consequence on the size and performance of my c# app if I do so ?
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Feb 27, 2009
It was there in VB 6. I have some images that I'm going to use a buttons, and I did this in VB 6 with the image control. however, this control doesn't appear to exist in VB.NET 2008 Express. I guess I could use a picture box, but isn't that overkill for such a simple task?
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Nov 14, 2010
when people first run my program (as in the FIRST EVER time they run it), I want a window to popup (Form4). In this Form you have to locate a directory to a certain program (my program uses this program) and press OK, and then that will generate a .txt file with the directory to the program. (So that my program knows where that program is located.) Now, what I want it to do is when you open up the program, upon load (Form1), I want the program to check if that text file (directory.txt) exists. If it does and the path in the file is correct, the program will run fine. If the text file is missing and/or the directory doesn't exist, it will bring you back to Form4 (assuming that this is your first time running the program since the directory.txt file doesn't exist).
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Jul 4, 2009
I want a message box to show when a username doesn't exist. I figured this would work but an error shows saying 'FileNotFoundException was Unhandled', for the fist line.
Dim UserFile As New System.IO.StreamReader(sPath & "" & UsernameBox.Text & ".txt")
Username = UserFile.ReadLine
Password = UserFile.ReadLine
[Code].....
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Oct 28, 2009
I'm trying to use a single event handler for several controls in an ASP.NET web page. I would like to add the event handler at runtime if and only if it doesn't already exist. In C#, I would write it as seen below:
if (myTextBox.OnTextChanged == null) myTextBox.OnTextChanged += DoTextChangingValidation;
Likewise, I know I can remove the event handler as follows:
if (myTextBox.OnTextChanged != null) myTextBox.OnTextChanged -= DoTextChangingValidation;
[code].....
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Dec 8, 2011
I am trying to add a registry key in to the file "MyApp" which doesn't yet exist in the registry key directory, when I try and write this key however I get an error from the debug console telling me the "NullReference was unhanded". If I go and manually make this folder it works brilliantly, I thought that this code would make the folder as well?
[Code]...
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Mar 7, 2011
What i need is, if a item in a listbox Doesn't exist, it needs to remove it from the other.
In the pic i have attached. Basically If it doesn't exist in Listbox2 then it needs to be removed from Listbox1 and tell the user which one has been removed.
i.e Test 02 doesn't exist. So messagebox would show "test02 has been removed" then remove it from listbox 1
It probably something simple thats sitting in the back of my mind, but for the life of me can't figure it out lol
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Mar 1, 2011
I got the above error when i deploy my web application into windows server 2003. How do i resolve it? [code]
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Jan 16, 2009
I'm copying code from one VB project to another PC but the 'datagrid' on the copy insn't inserting into the new PC. When the form loads the datagrid is missing. The error I got was that there was something missing from the machine. When I tried to add the datagrid using the 'Additional Controls' it doesn't seem to exist. Any chance I can download the control? The version of VB is 6.5 and its part of a graphics package I'm using.
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May 6, 2012
Mine is a simple conexion problem but I dont understands what's happening I have another form in the same project which has no problems at all, I desided to create a form to use it as a base form named plantillav only to duplicate forms and intance the others from that one I put it's Modifiers Property = Protected in ortder to modify property values in the other ones I don't know if the process generated a failure.
I created the following strconn:
Public
Class
clientesc
[CODE]...
This table was exported from phpmyadmin (wamp) so it means is created and even with registers inserted directly from console, the problem is when I send from the application, with the following error that indicates that the name of the field doesn't exist or is not well written; Unknown column 'code_empleado' in 'field list'.
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Feb 9, 2010
I am trying to import a flush component in a Form but in Choose Items... in the list of Com Component, Shockwave Flash Object deos not exist.
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Dec 18, 2011
Im developing a program that adds any number of tabs for each directory that contains user specified information and also adds a list view control on each tab that shows the files contained in said directories. I want the user to be able to double click a file in the list view(s) to open it.
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May 10, 2010
im trying to generate an error message to the user to let them know a file doesnt exist.So far ive got the user to enter the file name into a textbox, they click search and if successful will load a new form with a PDF file reader built in( AxAcroPDF1 )everytime i enter the right file name i get the file loaded, if enter the wrong name the File page still loads with no pdf and no message saying file doesnt exist.
Private
Sub PictureBox1_Click(ByVal
sender As System.Object,
ByVal e
[code]....
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Mar 4, 2012
I have recently published a simple text editor(just as an exercise). the editor has been published using Microsoft Visual Basic Express. Once the program is installed i wanted to make it a default opener for .txt files, so i clicked openwith ->Choose default program and then i was asked to show the location of the .exe. It seems like the .exe of my installed program doesn't exist. where the .exe is on a windows7 or tell me of another way of makeing that program the default opener.
Here is the link to the publish page: [URL]
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Jan 14, 2009
I have got some code that is working as i have edited the game.exe at a certain address, now i know the code can find the address, but I don't know how to make it stop searching for it if it isn't there.
here is the:
code:
So what I want to know, is how to stop this code, if the address doesn't exist.
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Jan 7, 2010
I'm making a database app. I've finish the search, add new, and add function. What I'm trying to do is to expand the functionality of the add new item function.
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Oct 3, 2008
so I've started using the Webbrowser control, and I've got it doing most of what I want (a button takes them straight to the correct page on the correct site, it's filling in text boxes, will fill out more once I get to that step).However when I go to the particular secure site my users are supposed to login to, it brings up what I assume is a windows domain login prompt with a check box to save the userid/password.
Saving the password is not allowed for this secure site, and when I use system.webclient to get the first page so I can use my own windows for getting the login info, it doesn't carry over the authentication info to the webbrowser if I let it go back to using the web browser's default navigation methods, nor does it load the images or the page properly.I was thinking I needed to set the webbrowser's credentials, but I can't find anything exposed to make changes to or override if I try to inherit.
i'm behind a webproxy, and the site itself requires login. I've figured out in code how to pull back secure pages that require you to be logged in, but when I pass that html up to the webbrowser it doesn't know how to access or load the images or other things that the html instructs it to do.
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Dec 25, 2011
i am searching a way to get the info of the assembly file, class and method which is executing in an assembly. the purpose is to return that info to a log file. i stumble into two examples from a completely different class : reflection and diagnostics.
[Code]...
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Apr 16, 2011
I wrote this code to the load event of the form which contain the report viewer , i connected it to the dataset but it is asking for login info whenever i am opening the report..
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Apr 4, 2010
I have a form in my application, and when I logIn, I make a query to SELECT the username, the password and the level of username.
"SELECT username, password, level FROM TLogin WHERE [username] = @username and [password] = @password and [level] = @level"
So, when I logIn, I go to a form called "Options", I would like to know how to only show the information about the user that I've loggedIn ?
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Oct 20, 2009
In my vb.net windows app, which runs on windows server 2003, i will like to return all the users who are logged into the server. How to do that?
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May 13, 2009
I have just added a login form to my main form which just has a username textbox and a password textbox. What i basically want a user to be able to do is enter their username and password into these fields and then for the form to store the values there.
So if they enter their username and password, and then click OK on the login form, if they were to open up the login form their details would still be there?I want to be able to call on these values else where? How do i store the info in the username and password fields? And if they then closed the form and opened it up again would it still remember what username and password had been entered?
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May 10, 2012
Hi, I've created a login screen for my application and defined the username and password using the following code
If UsenameBox.Text = "username" and PasswordBox.Text = "password" Then
Me.Hide()
Main.Show()
It works great however, I need the user to be able to set their own password using a registration form with the details being stored in a xml file. There are no security concerns with the password being stored in a text file as it's a mock login screen.
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