|
Hi, I want to create windows service in order to control the printer queue. And now I have read the following article http://www.developerfusion.co.uk/show/3441/[^] in order to create a simple windows service application. But one more thing that i still need is the way that I could control the printer queue from vb.net service application. Could any one provide me any information or resource in order to control the printer queue from vb.net service application for me? I need it in order to build a system to record the information about the printer utilization in my organization.
A thousand mile of journey, begin with the first step.
APO-CEDC
Save Children Norway-Cambodia Office
|
|
|
|
|
Use the System.Management (WMI) classes to get the queue informantion a simplistic example is here[^].
Absolute faith corrupts as absolutely as absolute power
Eric Hoffer
All that is necessary for the triumph of evil is that good men do nothing.
Edmund Burke
|
|
|
|
|
Thank you very much for your comment. But your code example is showing in C# version. I prefer to use it VB.Net, but now I still find the way to conver C# language to VB.Net. If it is possible then it would be fine for me.
Thank you for your help!!! 
A thousand mile of journey, begin with the first step.
APO-CEDC
Save Children Norway-Cambodia Office
|
|
|
|
|
Hi, i have a form which has a 1 datagrid and 12 label & textbox(like NAME, SURNAME, NATIONALITY, JOB etc..)and some buttons .I want to get data from database with one or more criteria (User if fill 2 criteria like NAME and SURNAME my query must be where NAME=txtname.text AND SURNAME=txtsurname.text) OR (user maybe fill only one criteria like NAME my query must be where NAME=txtname.text ) or (user maybe want to fill 8 or 6 or all criteria) and if user dont fill any criteria and click get button, query must be (Select * from ANABILGI) thats all..
I try to write a code below but unfortunately it was'nt worked.Would you somebody help me please.
Thanks a lot
Private Sub withcriteria()
Dim param As String = "ADI= txtad.Text & (param1) & SOYADI=txtsoyad.text & (param2)& BABAADI=txtbabaad.text & (param3)& ANAADI=txtanaad.text & (param4)& DYERI=txtdogumyer.text & (param5)& DTARIHI=txtdogumtar.text & (param6)& UYRUK=txtuyruk.text & (param7)& MESLEK=txtmeslek.text & (param8)& DIN=txtdin.text & (param9)& MEDENIHAL=txtmedenihal.text & (param10)& CINSIYET=txtcinsiyet.text & (param11)& TAHSIL=txttahsil.text"
Dim param1, param2, param3, param4, param5, param6, param7, param8, param9, param10, param11 As String
If txtad.Text.Length And txtsoyad.Text.Length And txtbabaad.Text.Length And txtanaad.Text.Length And txtdogumyer.Text.Length And txtdogumtar.Text.Length And txtuyruk.Text.Length And txtmeslek.Text.Length And txtdin.Text.Length And txtmedenihal.Text.Length And txtcinsiyet.Text.Length And txttahsil.Text.Length < 0 Then
Dim da As New OleDbDataAdapter("Select * from ANABILGI", baglan)
Dim ds As New DataSet
baglan.Open()
da.Fill(ds, "tablo")
DataGrid1.DataSource = ds.Tables("tablo")
baglan.Close()
DataGrid1.Select(DataGrid1.CurrentRowIndex)
Else
If txtad.Text.Length < 0 Then
param1 = "OR"
Else
param1 = "AND"
End If
If txtsoyad.Text.Length < 0 Then
param2 = "OR"
Else
param2 = "AND"
End If
If txtbabaad.Text.Length < 0 Then
param3 = "OR"
Else
param3 = "AND"
End If
If txtanaad.Text.Length < 0 Then
param4 = "OR"
Else
param4 = "AND"
End If
If txtdogumyer.Text.Length < 0 Then
param5 = "OR"
Else
param5 = "AND"
End If
If txtdogumtar.Text.Length < 0 Then
param6 = "OR"
Else
param6 = "AND"
End If
If txtuyruk.Text.Length < 0 Then
param7 = "OR"
Else
param7 = "AND"
End If
If txtmeslek.Text.Length < 0 Then
param8 = "OR"
Else
param8 = "AND"
End If
If txtdin.Text.Length < 0 Then
param9 = "OR"
Else
param9 = "AND"
End If
If txtmedenihal.Text.Length < 0 Then
param10 = "OR"
Else
param10 = "AND"
End If
If txtcinsiyet.Text.Length < 0 Then
param11 = "OR"
Else
param11 = "AND"
End If
End If
Dim da As New OleDbDataAdapter("Select * from ANABILGI where (param)", baglan)
Dim ds As New DataSet
baglan.Open()
da.Fill(ds, "tablo")
DataGrid1.DataSource = ds.Tables("tablo")
baglan.Close()
DataGrid1.Select(DataGrid1.CurrentRowIndex)
|
|
|
|
|
MAGICIANMERLIN wrote:
Dim param As String = "ADI= txtad.Text & (param1) & SOYADI=txtsoyad.text & (param2)& BABAADI=txtbabaad.text & (param3)& ANAADI=txtanaad.text & (param4)& DYERI=txtdogumyer.text & (param5)& DTARIHI=txtdogumtar.text & (param6)& UYRUK=txtuyruk.text & (param7)& MESLEK=txtmeslek.text & (param8)& DIN=txtdin.text & (param9)& MEDENIHAL=txtmedenihal.text & (param10)& CINSIYET=txtcinsiyet.text & (param11)& TAHSIL=txttahsil.text"
What are you expecting this to do ?
MAGICIANMERLIN wrote:
Dim da As New OleDbDataAdapter("Select * from ANABILGI where (param)", baglan)
What are you expecting to happen here ?
The easiest way to do this is to write a stored proc ( because the best way to do all of this is with stored procs ), that takes all of these possible search values, and searches using LIKE, so that you end up with blah LIKE % when no search paramater was provided. If you must do it creating SQL on the fly like this, then just build the query as you go. Either way, you should be parsing any input strings for SQL injection attacks.
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
Thank you but i am not using sql database i am using Access database and i will try to do it in Access Queries if possible..
Thanks A lot for your kindly answer
|
|
|
|
|
Access may not be a real database, but last time I checked, it used SQL.
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
[edit]Hello!
I want to center my text in the RichTextBox Control but i don't want use "\tab"
Is a solution exist ?
thank you for your answer .. [/edit]
I'm sorry but i've found my answer
i give the url : The RTF for RichTextBox
SeLoRBIS
|
|
|
|
|
Please help me this problem
|
|
|
|
|
This is nowhere near enough information to help you.
You're going to have to supply a better explanation of what your having a problem with. A code sample might also help.
RageInTheMachine9532
"...a pungent, ghastly, stinky piece of cheese!" -- The Roaming Gnome
|
|
|
|
|
I am trying to use a DropDownList for displaying and changing data within a database. As soon as I select a new value from the list and click the change link then look at the DropDownList selected index value in the Update_Command function it has changed back to the original value. Is there a way to capture the new value before the bind occurs so I can update the database?
---Code-----------------------------------------------------
<%@ Import Namespace="System.Data.OleDb"%>
<%@ Import Namespace="System.Data" %>
<%@ Page
Language="vb"
ValidateRequest="false"
AutoEventWireup="false"
enableViewState="True" %>
<%@ Import Namespace="nsGlobal" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
<title>Web Page</title>
<link rel="stylesheet" type="text/css" href="http://www.access.org/Aspx.css" media="screen">
<script language="VB" runat=server>
Dim sql as String
Dim idx as Integer
Dim StrucEvents as New clsStrucEvents
Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
If Not Request.IsSecureConnection Then
Dim sUrl as string
sUrl = Request.Url.ToString.Replace("http://www.access.org/",ConfigurationSettings.AppSettings("SecureUrl"))
Response.Redirect(sUrl)
End If
If Not IsPostBack Then
Dim PageStats as New clStats
PageStats.Load_PageStats()
End If
Fill_DonerDl
End Sub
Function ListTitleBlock() as String
Dim html as String
html = "<h2>"
html = html & "Doner List for "
html = html & StrucEvents.Id
html = html & "</h2>"
Return html
End Function
Sub Cancel_Command(ByVal sender As Object, ByVal e As DataListCommandEventArgs)
dlEventDonor.EditItemIndex = -1
dlEventDonor.DataBind()
End Sub
Sub Edit_Command(ByVal sender As Object, ByVal e As DataListCommandEventArgs)
dlEventDonor.EditItemIndex = e.Item.ItemIndex
dlEventDonor.DataBind()
End Sub
Sub Update_Command(ByVal sender As Object, ByVal e As DataListCommandEventArgs)
Dim strlstEdY as String, strlstEdD as String
strlstEdY = CType(e.Item.FindControl("lstEdY"), DropDownList).SelectedItem.Value
strlstEdD = CType(e.Item.FindControl("lstEdD"), DropDownList).SelectedItem.Value
Response.Write(strlstEdY & " " & strlstEdD & "<hr>")
End Sub
Sub Delete_Command(ByVal sender As Object, ByVal e As DataListCommandEventArgs)
End Sub
Function Fill_DataSource(strFld as String) as DataSet
Dim ds as DataSet = New DataSet()
Dim tbl As DataTable = New DataTable("tbl")
Dim col As DataColumn = New DataColumn(strFld)
tbl.Columns.Add(col)
ds.Tables.Add(tbl)
Dim Row As DataRow
Dim idx as integer
Select Case strFld
Case "EdY"
For idx = -4 to 5
Row = tbl.NewRow()
Row(strFld) = CStr(Year(DateAdd("yyyy",idx,Now)))
tbl.Rows.Add(Row)
Next
Case "EdM"
For idx = 1 to 12
Row = tbl.NewRow()
Row(strFld) = CStr(idx)
tbl.Rows.Add(Row)
Next
Case "EdD"
For idx = 1 to 31
Row = tbl.NewRow()
Row(strFld) = CStr(idx)
tbl.Rows.Add(Row)
Next
End Select
Session(strFld) = ds
Return ds
End Function
Function Get_SelectedIndex(strFld as String,strValue as string) as Integer
Dim iLoop as Integer
Dim dt as DataTable = Session(strFld).Tables("tbl")
For iLoop = 0 to dt.Rows.Count - 1
If strValue = dt.Rows(iLoop)(strFld) then
Return iLoop
End If
Next iLoop
End Function
''''''''''''''''''''''''''''''''
'''Database Access Functions '''
'\/''''''''''''''''''''''''''\/'
Private Sub Fill_DonerDl()
Dim objConn As OleDbConnection
Dim objComd As OleDbDataAdapter
Dim sql As String
Dim objDs as DataSet = New DataSet()
StrucEvents = Session("StrucEvents")
'On Error Resume Next
objConn = New OleDbConnection(ConfigurationSettings.AppSettings("Conn"))
sql = "SELECT "
sql = sql & "TblEventDonor.* "
sql = sql & "FROM TblEventDonor "
sql = sql & "WHERE "
sql = sql & "EdId = '" & StrucEvents.Id & "' "
sql = sql & ";"
'Response.Write(sql & "<hr>")
objComd = New OleDbDataAdapter(sql, objConn)
objComd.Fill(objDs,"TblEventDonor")
dlEventDonor.Datasource=objDs.Tables("TblEventDonor").DefaultView
DataBind()
objComd.Dispose()
objDs.Dispose()
objConn.Close()
End Sub
</script>
</HEAD>
<body MS_POSITIONING="GridLayout">
<form id="Form1" method="post" runat="server">
<div id='PageBox' style='width:100%;Left:0px;'>
<asp:DataList
runat="server"
Id="dlEventDonor"
BorderColor="#FFEF00"
BorderWidth="1"
GridLines="Both"
CellPadding="3"
CellSpacing="0"
OnEditCommand="Edit_Command"
OnCancelCommand="Cancel_Command"
OnUpdateCommand="Update_Command"
OnDeleteCommand="Delete_Command"
>
<HeaderTemplate>
<%# ListTitleBlock() %>
</HeaderTemplate>
<ItemTemplate>
<div class="Section1a">
<%# Container.DataItem("EdY")%>
<%# Container.DataItem("EdM")%>
<%# Container.DataItem("EdD")%>
<%# Container.DataItem("EdDonor")%>
<asp:LinkButton
Text="Edit"
CommandName="Edit"
Runat="server"
ID="edit" />
<asp:LinkButton
Text="Delete"
CommandName="Delete"
Runat="server"
ID="delete" />
<br>
</div>
</ItemTemplate>
<EditItemTemplate>
Year
..Month
<br>...Day:
<asp:Dropdownlist
DataTextField="EdY"
DataSource='<%# Fill_DataSource("EdY") %>'
SelectedIndex='<%# Get_SelectedIndex("EdY", Container.DataItem("EdY")) %>'
runat=server
ID="lstEdY"/>
</asp:Dropdownlist>
<asp:Dropdownlist
DataValueField="EdM"
DataTextField="EdM"
DataSource='<%# Fill_DataSource("EdM") %>'
SelectedIndex='<%# Get_SelectedIndex("EdM", Container.DataItem("EdM")) %>'
runat=server
ID="lstEdM"/>
</asp:Dropdownlist>
<asp:Dropdownlist
DataValueField="EdD"
DataTextField="EdD"
DataSource='<%# Fill_DataSource("EdD") %>'
SelectedIndex='<%# Get_SelectedIndex("EdD", Container.DataItem("EdD")) %>'
runat=server
ID="lstEdD"/>
</asp:Dropdownlist>
<asp:TextBox
Text='<%# DataBinder.Eval(Container.DataItem, "EdDonor") %>'
runat=server
ID="txtEdDonor"/>
<br>
<asp:LinkButton
id="button2"
runat="server"
Text="Update"
CommandName="update" />
<asp:LinkButton
id="button3"
runat="server"
Text="Cancel"
CommandName="cancel" />
</EditItemTemplate>
</ASP:DataList>
</div>
</form>
</body>
</HTML>
Thanks for any help!!
Steve
|
|
|
|
|
If there's a FAQ, this should be on it. The answer is no. You should wrap your databind in a !IsPostback block, so it does not bind on postback, it will get the data source along with the selected index from viewstate.
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
I have created a custom principal class based on IPrincipal and have exteded it for additional properties and methogs such as .UserName, .UserID to return data and IsInAnyRole to accept a list of possible roles for a user. Is there a way that I can use Declarative security with this for something like...
Public Shared Sub _<br />
[PrincipalPermissionAttribute(SecurityAction.Demand, IsInAnyRole:="Role1,Role2,etc...")] _<br />
PrivateInfo()<br />
<br />
'Print secret data.<br />
Console.WriteLine(ControlChars.CrLf + "You have access to the private data!")<br />
End Sub
The isInAnyRole is not part of the PrincipalPermissionAttribute class though. Is there an easy way to write or extend it so that I can use it with extended methods from my custom principal class?
Thanks in advanvce for any help...
|
|
|
|
|
Dear friends
I am new in vb.net and i try to make a some sample for practice. I am using that code below
Dim cmddelete As New OleDbCommand("Delete from ANABILGI where ADI=@param1, AND SOYADI= @param2, AND BABAADI=@param3", baglan)
cmddelete.Parameters.Add("@param1", txtad.Text)
cmddelete.Parameters.Add("@param2", txtsoyad.Text)
cmddelete.Parameters.Add("@param3", txtbabaad.Text)
baglan.Open()
cmddelete.ExecuteNonQuery()
baglan.Close()
but if i try to run it it was an error (Name 'ExecuteNonQuery' is not declared)
-------------------------------------------------------------------------------------------------
but if i run that code with update statement it is working that code is also below
Dim cmdupdate As New OleDbCommand("Update ANABILGI SET ADI=@adi, SOYADI=@soyadi, BABAADI=@babaadi, ANAADI=@anaadi WHERE ID=@ind", baglan)
cmdupdate.Parameters.Add("@adi", txtad.Text)
cmdupdate.Parameters.Add("@soyadi", txtsoyad.Text)
cmdupdate.Parameters.Add("@soyadi", txtbabaad.Text)
cmdupdate.Parameters.Add("@soyadi", txtanaad.Text)
cmdupdate.Parameters.Add("@ind", DataGrid1.CurrentRowIndex + 1)
baglan.Open()
cmdupdate.ExecuteNonQuery()
baglan.Close()
Getalldataindatagrid()
DataGrid1.Refresh()
End Sub
--------------------------------------------------------------------------------------------------
Thank you for your valuable helps
|
|
|
|
|
The DELETE query should not have any commas.
|
|
|
|
|
Thank you for your help;
I was corrected it by the same way which an other friend help to me about this.But also thank you for your kindly interest..
|
|
|
|
|
can anyone of u tell me how can i get the remote Computer system informtaion
like ( memeory info, machine info , ports info )
|
|
|
|
|
you have to install some component over there . to whom you will query and it will reply you back. like web service. or any component deployed on Transaction server or through remoting.
|
|
|
|
|
Hi,
How to display the images in VB.NETDatagrid
Thanks
|
|
|
|
|
Hello All,
I am not sure if I am repeating the same question asked in this forum before.
Can we dynamically generate the reports, say, like an user selecting the required fields across DB tables (through a front-end), specifying the criteria -us building the SQL query- and fetching the result from the DB.
Any help on this would be appreciated.
Thanks
|
|
|
|
|
Yes, of course we can. You need to provide the user with a list of possible search fields, build your SQL from them, check for injection attacks, and run the query. Which bit are you stuck on ?
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
Hi
First of all thanks for the reply
i am stuck at building sql query from the fields selected and then passing it on to the reports
Can you please help me out
|
|
|
|
|
Do you know any SQL at all ? I can't give advice that's any better than what google will offer unless I know what's in the tables you're searching.
Christian Graus - Microsoft MVP - C++
|
|
|
|
|
Yes i do know sql
I will give you a brief description with example
I have two different tables Say StuMaster and StuDetails
In StuMaster i have rollno,name,year
in studetails i have his rollno,addressinfo,marksinfo of eachsubject
Now i need something like selecting
rollno,name,year from master and marks of selected subjects of that year from the details table
So i will select the required subjects from the listbox and those fields are to be displayed onto the report.
|
|
|
|
|
Anonymous wrote:
marksinfo of eachsubject
Does this mean there's a column per subject, or are they all lumped in there ?
You want to select subjects, but that makes no sense, there's no column there to search by subject.
Christian Graus - Microsoft MVP - C++
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
