Creating Win App To Communicate Between Users On LAN
Jun 4, 2012
My project is to create a windows application for communicating between users on our LAN, to both send and receive short text messages. I am attaching a rough draft of my Form in Basic, with notes about what I want in the different parts. I am only trying to find out if my goals are possible in VB-2010, before I invest a lot of time searching for and experimenting with the code... so here are my initial questions:
1) Is it possible to build such an application in Visual Basic 2010, and would I be able to use the free "Express" version I have downloaded, or would I need to purchase the full version?
2) Basically, each user would run the EXE program which is the main window (like the attached), and would see all users connected to the LAN (and listening on the specified port) in the ListBox... would receive incoming messages in the top window (output from a console module I have already got working), and be able to send to anyone on the LAN using the bottom window... Is all of this possible in VB-2010?
3) Is there any complications making this application work well on both Windows XP and Windows 7 (64bit) user machines?
I don't expect this to be easy by any means, I just want to know if I'm embarking on something that is possible or not.
Attached image(s)
I am having trouble creating inactive users in VB. I watched the tutorial [URL]but it is for C# and the code behind won't work in VB. I need the users to be inactive when they register and send the administrator an email saying someone has registered to be approved.
So I had a report I needed to create and needed to get the total users per job for a system that I was not (and still am not) very familiar with. I asked the developer for that system for the code and was told it was no easy task. He sent me a query that didn't look anything like a user count. I told him I needed something to get all the users for each and every job in order to put it in the report I was building for one of the clients. I was told that wouldn't really work. I looked at his code as it worked on a per job basis.
The following is an example of the "logic" used to get the user count per job in asp.net: TRUNCATE TABLE1 INSERT username INTO TABLE1 FROM QUERY1 WHERE CRITERIA MET AND job = *passedinjob INSERT username INTO TABLE1 FROM QUERY2 WHERE CRITERIA MET AND job = *passedinjob AND username NOT IN TABLE1 SELECT username FROM TABLE1 and put in a dataset [Code] .....
There were no UNION statements in the query1 or query2, there was no select count(*) from table, there was no recordset.count..
I have a form which has a textbox named "textbox1", and a button named "Button 1". Button 1 is meant to be a submission for textbox1 (i.e. when button1 is pressed, the value of textbox1 is saved and remembered). I want the value of textbox1 to be remembered on any computer, but I need it to be update-able too. I tried using settings to do this like so:
Private Sub Form3_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Me.TextBox1.Text = My.Settings.TextBox1
[Code]....
but the problem in doing this is it only works for the current user. When the application is then put on another computer the value is blank.
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I have a form which has a textbox named "textbox1", and a button named "Button 1". Button 1 is meant to be a submission for textbox1 (i.e. when button1 is pressed, the value of textbox1 is saved and remembered). I want the value of textbox1 to be remembered on any computer, but I need it to be update-able too.I tried using settings to do this like so:
Private Sub Form3_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Me.TextBox1.Text = My.Settings.TextBox1 End Sub
[code]....
but the problem in doing this is it only works for the current user. When the application is then put on another computer the value is blank.
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- Log in - Out for Break - In from Break - Log out
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"Update requires a valid DeleteCommand when passed DataRow collection with deleted rows"
My code below
CODE:
So I know I need to add a delete command, but how do I write this in code and do I write it in the saveitem click event? I guess I would because the app crashes when I click save to update the dataset.
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I get this error
HTML
There is already an open DataReader associated with this Command which must be closed first.
Here is my code
vb.net UserLists.Items.Clear() Dim connection As New SqlClient.SqlConnection(My.Settings.ConnectString) Dim command As New SqlClient.SqlCommand("SELECT * FROM Users ORDER BY PersonName",
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2.Also , in order for the user to be able to use the application, he�ll have to register it then, everytime, before the application loads, it gets verified online that it was registered, maybe validate the registration information or a valid user name and password, no critical personal information. The target of this step is for the application to be used exclusively by the registered user and maybe on his computer only.
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