Can someone please look into this and help me out..................
I recently developed a VB.NET utility for extracting data from a DB2 table and populating an HTML report format. I am using ISeries ODBC provider for connection. The utility seems to be working fine for most users.
For some users, apparently the ones without admin privileges on their systems, this fails to work. The users are getting the below error:
System.Transactions.Diagnostics.DiagnosticTrace threw an exception
The error occurs on the connection.Open line of the DB connection section.
Dim cn = New OdbcConnection("DSN=dsnname;UID=user;PWD=pswd")
Dim cmd As New OdbcCommand(qry, cn)
cn.Open() ' here
Is there any way to resolve this without granting admin privilege to the users?
There was something wrong with my App.Config file.
I deleted it and added a new one from a new project and it fixed it for me.
Related
That's my first post here, so please indicate me if there are some missing useful informations' to help to solve my problem.
Here is it:
I have a VB.net application using Access database (.mdb), which worked properly for years.
Because I'm using now Access Database Engine 2016 in 64-bits, I have changed my DB connection provider from Microsoft.Jet.OLEDB.4.0 (only available in 32-bits) to Microsoft.ACE.OLEDB.12.0. I've also unchecked in my app's properties "32-bits prefered" (translation from my French version of Visual Studio).
Since I did these changes (and only them), I often get the following error:
System.AccessViolationException: 'Attempted to read or write
protected memory. This is often an indication that other memory is
corrupt.
It appears (randomly) in different parts of the software, always at the line myConnection.Open()
Dim myConnection As OleDbConnection = New OleDbConnection(S7ConnString)
Try
myConnection.Open()
...
First new connection string with which I began to get this problem is:
Public S7ConnString As String = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" & DBPath & ";Jet OLEDB:Database Password=***;"
(where DBPath is a string for the Access .mdb file path)
After some searches, I've read that adding OLE DB Services=-1 could solve it. It improved speed of DB processes really much, but did not solved the problem.
Would you have any idea to solve this?
Thank you & Kind regards.
I have uninstalled Access Database Engine 2016 and installed 2010 64-bits version, and it seems to work correctly now.
Thank you for your suggestions, #Jimi, that helped me to solve this. I did not imagine "Microsoft.ACE.OLEDB.12.0" provider was not compatible with MS Access Database Engine 2016!
My application uses a database stored in a file available via network. So far, I've been using a MS-Access file (.accdb), but I'm trying to migrate to SQLite Version 3 (.db3).
I added SQLite NuGet package to my project and created a SQLite database using SQLiteStudio. I refactored my database objects to work with System.Data.SQLite.SQLiteConnection instead of System.Data.OleDb.OleDbConnection and it worked well.
However, my previous accdb database was password protected, and I don't know how to apply a password over my current SQLite database.
Can anyone teach me ho to do it? Thanks in advance!
I followed the link which Wudge kindly appointed in comment above, and it works, but I'd rather clarify what need to be done:
To set a password to an unprotected database:
Dim conn = New SQLite.SQLiteConnection(
"Data Source=C:\yourFolder\yourDB.db3;Version=3;")
conn.Open()
conn.ChangePassword("password")
conn.Close()
To open a password-protected database:
Dim conn = New SQLite.SQLiteConnection(
"Data Source=C:\yourFolder\yourDB.db3;Version=3;")
conn.SetPassword("password")
conn.Open()
conn.Close()
or
Dim conn = New SQLite.SQLiteConnection(
"Data Source=C:\yourFolder\yourDB.db3;Version=3;Password=password;")
conn.Open()
conn.Close()
To remove password from a password-protected database:
Dim conn = New SQLite.SQLiteConnection(
"Data Source=C:\yourFolder\yourDB.db3;Version=3;Password=password;")
conn.Open()
conn.ChangePassword(String.Empty)
conn.Close()
PS. The open source database manager SQLiteStudio is able to open files which were password-protected that way, as long as you choose System.Data.SQLite instead of Sqlite 3 as your database type. (Requires v 3.1.1, the current version).
I have a requirement to upload excel data into a SQL Server 2005 table. Initially I copied Excel data to a temp table and based on condition I have updated and inserted records into the SQL Server table.
Everything works fine in my local system. Same program I moved to quality server there I faced this error
The 'Microsoft.ACE.OLEDB.12.0' provider is not registered on the local machine.
Then we installed 'Microsoft.ACE.OLEDB.12.0 provider on quality server. Now this error appearing
The Microsoft Office Access database engine cannot open or write to the file ''. It is already opened exclusively by another user, or you need permission to view and write its data."
Kindly help me out to solve this issue.
SqlConnection con = new SqlConnection();
con = SQLManager.openSQLConnection();
string path = FileUpload1.PostedFile.FileName;
string excelConnectionString = #"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties=Excel 12.0 Xml;Persist Security Info=False";
//Create Connection to Excel work book
OleDbConnection excelConnection = new OleDbConnection(excelConnectionString);
OleDbCommand cmd = new OleDbCommand("Select [CM_CODE],[CM_NAME],[CM_ADD1],[CM_ADD2],[CM_ADD3],[CM_ADD4],[CM_CITY],[CM_PHONE],[CM_CG_CODE],[CM_CO_CODE],[CM_EXPIRY_DATE],[CM_PINCODE],[CM_EMAIL] from [Sheet1$]", excelConnection);
excelConnection.Open();
OleDbDataReader dReader;
dReader = cmd.ExecuteReader();
Regards,
Sathya
This is most likely a file permissions issue. Does the account that the program runs under have folder level permission to read files from the file location.
Find out which account the program runs under and then add appropriate access permissions to the folder where you upload your excel files.
If it's IIS then whichever account your app pool runs under needs write access to the folder that you upload to. Permissions can usually only be set by web server admin.
Wing
Finally i found out the solution.
I have created one folder under my application folder in Quality server.
Uploaded excel sheets wil get stored under this new folder.
and that path i am referring while updating my SQL server database.
Everything works fine now...
Thank u all for your support
Regards,
Sathya
Edit MY goal is this, I need to do read data from a Remedy Database using a VB .Net app. /Edit
I am trying to read data from the AR System ODBC driver in a VS 2010 VB windows form.
I have added a connection in the data connections via , a system dsn, connection string pulled from a working excel data pull, and built a connection string based via the wizard.
I can test connection, and it comes back 'test connection succeeded'.
When I click ok and the Data connection goes to my server explorer, it expands to tables, view, and procedures and viewing/refreshing those causes errors such as:
Column 'Table_Cat' does not belong to table Tables.
Error [im00][ar system odbc driver] not supported
I am aware there is the api out there, however this has a problem in that the api acts like a login session from the client, which limits you to one login session. This not feasible for the task at hand as the user needs to remain logged into remedy, and the app I'm writing will be read only for data.
The goal is a billboard app that will display certain tickets, kind of like a stock ticker.
There will be no editing of ticket data from remedy, I just need to read the tickets and provide tallies and alerts for our helpdesk.
It seemed so easy when I sat down, but now 4 hours later and a mind numbing amount of irrelevant google results, I'm almost wondering if I'm going to have to report back that it cannot be done with out the api and creating more remedy accounts. Not having to create additional remedy accounts was part of of the request put to me.
Tags: Visual Studio 2010 BMC AR System Remedy ODBC VB.NET
Update
So I have done the code by hand and now seem a few steps forward, but still blind.
Ok, so if i export my excel query it looks like this from the dqy file
export.dqy
DRIVER={AR System ODBC Driver};ARServer=xxxxxx;ARServerPort=xxxxx;UID=xxxx;PWD=xxxx;ARAuthentication=;SERVER=NotTheServer
SELECT "EN:HelpDesk"."Company Name", "EN:HelpDesk"."Call Status", "EN:HelpDesk"."Caller Region", "EN:HelpDesk"."Next Action", "EN:HelpDesk"."Detailed Description(FTS)", "EN:HelpDesk".Device, "EN:HelpDesk"."Submitted-by", "EN:HelpDesk".Impact, "EN:HelpDesk"."Arrival Time", "EN:HelpDesk"."Call Id", "EN:HelpDesk".Market FROM "EN:HelpDesk" "EN:HelpDesk" WHERE ("EN:HelpDesk"."Call Status"<>'Closed') AND ("EN:HelpDesk"."Submitted-by"<>'nis') AND ("EN:HelpDesk".Impact='High') AND ("EN:HelpDesk".Market='DCIN') AND ("EN:HelpDesk"."Caller Region"<>'UK')
First off, these quotes look wrong to me, but it seems to work because if I leave them, executing the command doesn't fail, however it doesn't return data to my data grid view in vb.
Second the EN:Helpdesk looks odd to me but again same results as the quotes.
I have tried changing the quotes to brackets [ ] but receive errors once I do.
Here is my code:
VB Code
Imports SystemM My goal
Imports System.Data
Imports System.Data.Odbc
Imports System.Data.SqlClient
Sub Main()
Dim sql As String
Dim connectionString As String = "DRIVER={AR System ODBC Driver};ARServer=xxx;ARServerPort=xxx;UID=xxx;PWD=xxx;ARAuthentication=;SERVER=NotTheServer"
sql = "SELECT ""EN:HelpDesk"".""Company Name"", ""EN:HelpDesk"".""Call Status"", ""EN:HelpDesk"".""Caller Region"", ""EN:HelpDesk"".""Next Action"", ""EN:HelpDesk"".""Detailed Description(FTS)"", ""EN:HelpDesk"".Device, ""EN:HelpDesk"".""Submitted-by"", ""EN:HelpDesk"".Impact, ""EN:HelpDesk"".""Arrival Time"", ""EN:HelpDesk"".""Call Id"", ""EN:HelpDesk"".Market FROM EN:HelpDesk WHERE (""EN:HelpDesk"".""Call Status""<>'Closed') AND (""EN:HelpDesk"".""Submitted-by""<>'nis') AND (""EN:HelpDesk"".Impact='High') AND (""EN:HelpDesk"".Market='DCIN') AND (""EN:HelpDesk"".""Caller Region""<>'UK')"
Dim bindingSource1 As New BindingSource()
Me.SQLDS_reportresults.DataSource = bindingSource1
Dim myAdapter = New OdbcDataAdapter(sql, connectionString)
Dim commandBuilder As New OdbcCommandBuilder(myAdapter)
Dim table As New DataTable()
table.Locale = System.Globalization.CultureInfo.InvariantCulture
myAdapter.Fill(table)
bindingSource1.DataSource = table
Me.SQLDS_reportresults.AutoResizeColumns(DataGridViewAutoSizeColumnsMode.AllCellsExceptHeader)
End Sub
Project is a windows forms with a button to activate main(), a textbox (textbox1) and a datagridview(SQLDS_reportresults).
As the code stands, this causes no errors, but my datagridview never populates. Since there are no errors, I'm inclined to think my connection is working , and that my command is being executed,making my problem lay in code, however given the funky use of quotes and en:helpdesk in the sql command, I'm also concerned that is malformed and causing the where portion to return no results.
Anyone have any suggestions / ideas?
I need a way to display these results in app, and right now I don't care how just as long as I can see some data at all.
I've been googling and looked at the vb examples in the api zip but that is not related to opening a odbc connection and I found that of little help in my research.
I almost feel like I'm missing something simple or obvious.
When i run odbcad32.exe my ar system odbc driver shows 7.00.01.02 which is what I assume is installed on everyones machines as I used the remedy install set provided to me by the IT/Software admins to build this dev box.
I've found a few examples of using vb.net to access an sql database, so far none of them have worked . They all involve using DataReaders. Maybe its the fact that the sql db is not on the same machine as the application.
I was just wondering if anyone had a more comprehensive example of using VB.NET to access a remote sql server.
Thanks!
EDIT:
I've received a few helpful comments an replies already. So far my connection string looks like:
"server=sqlblah.myhost.com;uid=myuser;pwd=pass;database=testdb"
Probably also good to mention their is no editing of the tables a this point, just reading.
Check out the SQLClient class.
One convienent way to access a SQL database is to fill a DataSet object with query data with a DataAdapter object.
Dim sSQL As String = "SELECT * FROM ???"
Dim conn As New SqlClient.SqlConnection("connection string")
Dim da As New SqlClient.DataAdapter(sSQL, conn)
Dim ds As New DataSet
da.Fill(ds, "TABLE NAME")
You can then access the "TABLE NAME" table in the DataSet object.
The "connection string" is obviously your SQL connection string.
Use the sSQL string to query as necessary.
Quick side note - a helpful tool for creating connection strings:-
Open up a text document (notepad, wordpad etc) and save a blank document with the extension ".UDL".
This will give you a "Data link Properties" mini app.
Open up the app and change the provider in the "Provider" to whichever provider you need (in this case OLE DB Provider for SQL Server).
You then need to build up the connection in the connection tab.
Once you have chosen the criteria (ServerName (the drop down list will show you all visible Servers), Security permissions,Database (this drop down list will be populated based on the server chosen)) you can test your connection (to make sure you have permissions etc).
Click ok to close the App, rename the file to have a ".txt" extension and re-open in a text editor, hey presto, one built up connection string (as below).
Provider=SQLOLEDB.1;Integrated Security=SSPI;Persist Security Info=False;Initial Catalog=YOURDBNAME;Data Source=YOURSERVERNAME