Showing posts with label VB.NET. Show all posts
Showing posts with label VB.NET. Show all posts

Creating Connections to Oracle Databases


  • ' Visual Basic
    Public Sub ConnectToOracle()
    Dim conn As New OracleClient.OracleConnection()
    ' TODO: Modify the connection string and include any
    ' additional required properties for your database.
    conn.ConnectionString = & _
    "Data Source=;Integrated Security=yes"
    Try
    conn.Open()
    ' Insert code to process data.
    Catch ex As Exception
    MessageBox.Show("Failed to connect to data source")
    Finally
    conn.Close()
    End Try
    End Sub

    // C#
    public void ConnectToOracle()
    {
    OracleClient.OracleConnection conn =
    new OracleClient.OracleConnection ();
    // TODO: Modify the connection string and include any
    // additional required properties for your database.
    conn.ConnectionString = "Data Source=" +
    ";Integrated Security=yes";
    try
    {
    conn.Open();
    // Insert code to process data.
    }
    catch (Exception ex)
    {
    MessageBox.Show("Failed to connect to data source");
    }
    finally
    {
    conn.Close();
    }
    }


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Creating Connections to ODBC Data Sources


  • ' Visual Basic
    Public Sub ConnectToOdbc()
    Dim conn As New System.Data.Odbc.OdbcConnection
    ' TODO: Modify the connection string and include any
    ' additional required properties for your database.
    conn.ConnectionString = & _
    "FIL=MS Access;DSN=valid data source name"
    Try
    conn.Open()
    ' Insert code to process data.
    Catch ex As Exception
    MessageBox.Show("Failed to connect to data source")
    Finally
    conn.Close()
    End Try
    End Sub

    // C#
    public void ConnectToData()
    {
    System.Data.Odbc.OdbcConnection conn =
    new System.Data.Odbc.OdbcConnection ();
    // TODO: Modify the connection string and include any
    // additional required properties for your database.
    conn.ConnectionString = "FIL=MS Access;DSN=valid data source name";
    try
    {
    conn.Open();
    // Process data here.
    }
    catch (Exception ex)
    {
    MessageBox.Show("Failed to connect to data source");
    }
    finally
    {
    conn.Close();
    }
    }


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Creating Connections to Access Databases


  • ' Visual Basic
    Public Sub ConnectToAccess()
    Dim conn As New System.Data.OleDb.OleDbConnection()
    ' TODO: Modify the connection string and include any
    ' additional required properties for your database.
    conn.ConnectionString = & _
    "Provider=Microsoft.Jet.OLEDB.4.0;Data source=" & _
    "C:\Documents and Settings\username\My Documents\dbFile.mdb"
    Try
    conn.Open()
    ' Insert code to process data.
    Catch ex As Exception
    MessageBox.Show("Failed to connect to data source")
    Finally
    conn.Close()
    End Try
    End Sub

    // C#
    public void ConnectToAccess()
    {
    System.Data.OleDb.OleDbConnection conn = new
    System.Data.OleDb.OleDbConnection();
    // TODO: Modify the connection string and include any
    // additional required properties for your database.
    conn.ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;" +
    @"Data source= C:\Documents and Settings\username\" +
    @"My Documents\AccessFile.mdb";
    try
    {
    conn.Open();
    // Insert code to process data.
    }
    catch (Exception ex)
    {
    MessageBox.Show("Failed to connect to data source");
    }
    finally
    {
    conn.Close();
    }
    }


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Creating Connections to SQL Server


  • ' Visual Basic
    Public Sub ConnectToSql()
    Dim conn As New SqlClient.SqlConnection
    ' TODO: Modify the connection string and include any
    ' additional required properties for your database.
    conn.ConnectionString = & _
    "integrated security=SSPI;data source=SQL Server Name;" & _
    "persist security info=False;initial catalog=northwind"
    Try
    conn.Open()
    ' Insert code to process data.
    Catch ex As Exception
    MessageBox.Show("Failed to connect to data source")
    Finally
    conn.Close()
    End Try
    End Sub

    // C#
    public void ConnectToSql ()
    {
    System.Data.SqlClient.SqlConnection conn =
    new System.Data.SqlClient.SqlConnection ();
    // TODO: Modify the connection string and include any
    // additional required properties for your database.
    conn.ConnectionString =
    "integrated security=SSPI;data source=SQL Server Name;" +
    "persist security info=False;initial catalog=northwind";
    try
    {
    conn.Open();
    // Insert code to process data.
    }
    catch (Exception ex)
    {
    MessageBox.Show("Failed to connect to data source");
    }
    finally
    {
    conn.Close();
    }
    }

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