Question

I am using VS 2010 and C#. I want to connect to an MDB in C#. ’till now what I have done is as follows:

string strAccessConn = "Provider=Microsoft.ACE.OLEDB.4.0;Data Source=C:\\Databases\\"+DBname+".mdb";

DataSet myDataSet = new DataSet();
OleDbConnection myAccessConn = null;

try
{
    myAccessConn = new OleDbConnection(strAccessConn);

    OleDbCommand myAccessCommand = new OleDbCommand(Query, myAccessConn);
    OleDbDataAdapter myDataAdapter = new OleDbDataAdapter(myAccessCommand);

    myAccessConn.Open();
    myDataAdapter.Fill(myDataSet, "Table");
}
catch(Exception Ex)
{
    MessageBox.Show(Ex.ToString());
}
finally
{
    myAccessConn.Close();
}

The database returns the valid DataSet … thats not the problem for Access 2000 Database

However when I change the connection string to

string strAccessConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Databases\\"+DBname+".mdb";

for MSAccess2007 the database path is not found and an exception is generated although it exist. Am I missing any references?

Answer 1

Try changing your Access data file extension from .mdb to .accdb:

"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Databases\\"+DBname+".accdb";

See connectionstrings.com for reference.