Connecting to Access DB

[Blueie]

Hello

Can I ask, please, that someone passes their eye over this to see that I have got it right and that it does what it is supposed to do which is: a) connect to the database; b) open it; c) check that the email address entered by the user is the same as in the Access email column called strEmail; and d) closes Access.

I have spent hours trying to resolve a 'connection doesn't initialize' with cmd.ExecuteNonQuery(), but I am now not getting that error.

Protected Sub btnPassSend_Click(sender As Object, e As EventArgs) Handles btnPassSend.Click

        Dim conn As New OleDbConnection
        Dim OleDbConnection As New OleDbConnection
        Dim cmd As New OleDbCommand

        ' Check if email field is empty

        If UserEmail.Text = "" Then

            ErrorMsg.Text = "Please complete the required fields"
            ErrorMsg.Visible = True

        End If

        'Connect to Access

        conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|students.mdb;"

        conn.Open()

        cmd = New OleDbCommand("SELECT strEmail FROM university WHERE strEmail=@strEmail", conn)

 'Check the user's email address in the strEmail column in Access corresponds to that entered by the user in 
 'the TextBox whose ID is "UserEmail"

        cmd.Parameters.AddWithValue("@strEmail", UserEmail.Text)

        cmd.Connection = conn

        cmd.ExecuteNonQuery()

        'close Access connection 

        conn.Close()

        'SMTP code follows...

Thanks for your time!

 

[xwb]

What kind of access database is it: 97-2003 i.e. .mdb or 2007 onwards i.e. accdb?

JET4.0 will only connect to an .mdb. If you wish to connect to accdb, use ACE.OLEDB.12.0

 

[Blueie]

Hello xwb

Thanks for your reply.

It's Access 2007 (.mdb).

 

[xwb]

Not sure what | does in datasource. Shouldn't it be
Possibly something like

Data Source=DataDirectory\students.mdb

 

[Blueie]

No, it is supposed to look like this:

connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=|DataDirectory|students.mdb;" providerName="System.Data.OleDb"/>

That's the correct path. The database is kept in a folder called App_Data and I think DataDirectory refers to that.

 

[jbenson001]

http://stackoverflow.com/questions/1409358/ado-net-datadirectory-where-is-this-documented

http://www.connectionstrings.com/access-2007/