Visual Basic

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Logon form using windows services sezhian_vertical13-Dec-06 21:15 sezhian_vertical 13-Dec-06 21:15  Dear friends! actually i am trying to create a login form which should load b4 or after logon in the windows,thery validating users r allowed to access the system. I want to implement this using windows services! pls Guide me. thanks sezhi Re: Logon form using windows services nlarson1114-Dec-06 3:37 nlarson11 14-Dec-06 3:37  By system do you mean: 1) the computer/network? -- wouldn't windows already take care of that? 2) some kind of application? -- you could make it easy on the user and grab the logged in user id and use that to authenticate access to the application. Re: Logon form using windows services Dave Kreskowiak14-Dec-06 9:57 Dave Kreskowiak 14-Dec-06 9:57  Windows already does this on its own. It also will NOT let a user switch desktops unless they logon to the system first, thereby defeating ability to even SHOW a desktop, let alone get input on it. What are you REALLY trying to do with this? Dave Kreskowiak Microsoft MVP - Visual Basic vb-graph-gdi [modified] aamn113-Dec-06 18:52 aamn1 13-Dec-06 18:52  i draw a line chart on form in a picture box as i need to move these line further. i need to get all the points(xy) coordinates of the line. can anyone helps.any help or suggestion greatly appriciated thanks. -- modified at 1:45 Thursday 14th December, 2006 amolk Re: vb-graph-gdi Christian Graus14-Dec-06 0:25 Christian Graus 14-Dec-06 0:25  As soon as you want to do anything more than show a picture, you should ditch the picture box and handle your own paint event. To get the co-ordinates along a line, work out the rate of ascent in one direction, then use fixed values in the other direction to work out your co-ordinates. So if you have a line from 10, 30 to 200, 150, your rate of ascent is (200-10)/(150-30) or 190/120. In other words, for every 19 pixels in the X, you travel 12 in the y. 19/12 = 1.583. So, to calculate your Y, multiple your X by 1.583, after normalising ( subtracting 10 and 30 so you start at 0 ). Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog re: primary key rrrriiizz13-Dec-06 18:17 rrrriiizz 13-Dec-06 18:17  hello all, am creating an application using vs.net2005 and sql server as a backend and vb as my code begin. my problem is am setting eno as a primary key field in that field an user entered a number which is alreay in the database it was shown some msg(that no is in the database please choose different no) am writing code for thi. but it is not working propherly. cause when ever user enter no it was check that condition and the clear again he put the same no in the text it was not show that message. am attaching my code. please help me to solve the issue.... Private Sub txteno_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles txteno.Leave con.Open() Dim A As Integer A = txteno.Text str = "select eno from empl" cmd = New OdbcCommand(str, con) While Not rs.EOF 'If (A = rs.getvalue("eno")) Then If (A = rs.Fields(0).Value) Then MsgBox("Eno Already in DataBase so Please select Different No") txteno.Text = "" End If rs.MoveNext() End While con.Close() End Sub Re: re: primary key nlarson1114-Dec-06 3:44 nlarson11 14-Dec-06 3:44  1) you can bypass the while loop by putting the value of the textbox in the where clause of the select statement str = "select eno from empl where eno=" & cint(txteno.text) if not rs.eof then it exists -- msgbox 2) where did rs get set, your code doesn't specify? how to detect that a process is being close by a task manager carl_sti13-Dec-06 17:35 carl_sti 13-Dec-06 17:35  is there any way to identify that the process is being close by task manager? (not in the application tab but in the process tab) im using the formclosed event of the form but it doest work.. Private Sub frmMain_FormClosed(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles Me.FormClosed Select Case e.CloseReason Case CloseReason.ApplicationExitCall MsgBox("Notify") Case CloseReason.FormOwnerClosing MsgBox("Notify") Case CloseReason.MdiFormClosing MsgBox("Notify") Case CloseReason.None MsgBox("Notify") Case CloseReason.TaskManagerClosing MsgBox("Notify") Case CloseReason.UserClosing MsgBox("Notify") Case CloseReason.WindowsShutDown MsgBox("Notify") End Select but it doesnt work when i closed the form in process tab(Task Manager).. -- modified at 1:57 Thursday 14th December, 2006 Re: how to detect that a process is being close by a task manager Dave Kreskowiak14-Dec-06 10:03 Dave Kreskowiak 14-Dec-06 10:03  There are a few different methods TaskManager TRIES on the Applications tab before doing the brute force "halt execution and free the memory" method. This last-ditch method is what the Processes tab uses when it "kills" a process. It isn't detectable by your code since your process ceases to execute when TaskManager obliterates the Process using this method. Dave Kreskowiak Microsoft MVP - Visual Basic Re: how to detect that a process is being close by a task manager Dave Kreskowiak16-Dec-06 4:02 Dave Kreskowiak 16-Dec-06 4:02  No, there isn't. You code STOPS executing, immediately. You don't have any way of detecting this if your no longer running. Dave Kreskowiak Microsoft MVP - Visual Basic TreeView hierarchical Parent-Child kindman_nb13-Dec-06 11:05 kindman_nb 13-Dec-06 11:05  Hi I'm using vb.net 2005 I want to use treeview to view the table as a tree for expample : id Name Parent 1 A1 2 B1 11 AA 1 23 BC 2 112 AcA 11 ... etc how can i make the treeview view the table as a tree please every one try to help me to give me an example project jooooo Re: TreeView hierarchical Parent-Child kindman_nb13-Dec-06 21:47 kindman_nb 13-Dec-06 21:47  id::::Name::::Parent 1 :::::A1 :::: 2 :::::B1 :::: 11:::::AA :::: 1 23:::::BC :::: 2 112::::AcA :::: 11 No one want to help me , or give me any web site that i can find the asnswer there jooooo delete line jds120713-Dec-06 7:20 jds1207 13-Dec-06 7:20  Does anyone know how to delete a line within a txt file. I am trying to clean up a file that has unnecessary lines. Any advice would help! jds1207 Re: delete line Christian Graus13-Dec-06 8:06 Christian Graus 13-Dec-06 8:06  You need to read the file into memory, remove the lines, and overwrite the file. You can't just delete a line from a file. Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog Re: delete line jds120713-Dec-06 8:28 jds1207 13-Dec-06 8:28  Do you have any sample code? Re: delete line Christian Graus13-Dec-06 8:39 Christian Graus 13-Dec-06 8:39  File.ReadAllText and File.WriteAllText ( from memory ) will let you read and write an entire file.  The System.IO.File class has static methods to do it, for sure.  And, the My shortcut in VB offers this stuff as well My.FileSystem, I think. Christian Graus - C++ MVP 'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert Re: delete line jds120713-Dec-06 9:05 jds1207 13-Dec-06 9:05  But is there a way to get rid of a line in the file through code? Re: delete line Christian Graus13-Dec-06 9:12 Christian Graus 13-Dec-06 9:12  No.  There is a way to read a file, and a way to overwrite a file.  There is no way to select a line in a file and delete it.  You need to read in the whole file, manipulate it, and over write it.  as I said. Christian Graus - C++ MVP 'Why don't we jump on a fad that hasn't already been widely discredited ?' - Dilbert Window Service Accesing folder nitin_ion13-Dec-06 5:55 nitin_ion 13-Dec-06 5:55  I have created a window service which accesses a folder on a seperate system and writes a file into it. Everyone has been granted access on that folder Now when i install service with user account it is able to create file into it, but when i install service with either local system,local service or network service it is anot able to write file into it. it says "Access denied" to that folder. Is there a way that i can write file into that folder with either local system,local service or network service. Since i have tried with all possible right granted to that folder. Re: Window Service Accesing folder nlarson1113-Dec-06 10:25 nlarson11 13-Dec-06 10:25  "everyone" does not include IUSR/IWAM/ASP.NET try giving asp.net user write access to that folder (if it still fails try iusr/iwam also) Re: Window Service Accesing folder nitin_ion13-Dec-06 16:43 nitin_ion 13-Dec-06 16:43  I have a window service which is accessing a shared folder on another server. how does ASP.Net user will solve this problem as it is for IIS. Also i want to access folder by installing services with "Local System" status Re: Window Service Accesing folder nlarson1114-Dec-06 3:28 nlarson11 14-Dec-06 3:28  My apologies...I misread window service as webservice. you can use impersionation. have the window service logon as someone that does have access or falls under the group everyone when writing to the shared folder... Re: Window Service Accesing folder nitin_ion14-Dec-06 16:52 nitin_ion 14-Dec-06 16:52  I have impersonated using WMI, and while checking directory i use system.io.Directory.Exists("Shared folder path") it gives me exception "Access Denied" cause when i register service as Local System it uses Local system a/c to get access to the folder and that's why it says "Access Denied" but when i Register it with User account it uses that a/c to get access which is in Everyone. The work around is that register the service with User a/c but how to access folder with service registered "Local system" please help !!!! peteyshrew13-Dec-06 4:03 peteyshrew 13-Dec-06 4:03  sorry i explained the query wrong. i need to use a button to replace the selected item with the one above, and do the same with the one below. i suppose this code could be modified a bit but dont know how. can anyone help me please. Select Previous: ListBox1().SelectionMode = SelectionMode.One If Me.ListBox1.SelectedIndex > 0 Then Me.ListBox1.SelectedIndex = Me.ListBox1.SelectedIndex - 1 End If Select Next: ListBox1().SelectionMode = SelectionMode.One If Me.ListBox1.SelectedIndex < Me.ListBox1.Items.Count - 1 Then Me.ListBox1.SelectedIndex = Me.ListBox1.SelectedIndex + 1 End If Re: please help !!!! Guffa13-Dec-06 4:07 Guffa 13-Dec-06 4:07  Stop spamming. --- It's amazing to see how much work some people will go through just to avoid a little bit of work.

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