Programmatically Build Access Query

Question

A Microsoft Office Access database contains Tables, Queries, Forms and Reports.

Is it possible to build and save a query in the Access database from C#?

For e

Answer 1

If you want to add Querydefinitons to an existing access database you can do so with the Access Interop asssembly.

Create a new c# project and add a reference to:

Microsoft Office 12.0 Access database engine Object Library

(or a version that matches your Office/Access version)

This code creates a Query in the Access Database for every table in the database to query the count of rows:

        var dbe = new DBEngine();
        var db = dbe.OpenDatabase(@"c:\path\to\your\youraccessdatabase.accdb");

        // loop over tables
        foreach (TableDef t in db.TableDefs)
        {
            // create a querydef
            var qd = new QueryDef();
            qd.Name = String.Format("Count for {0}", t.Name);
            qd.SQL = String.Format("SELECT count(*) FROM {0}", t.Name);

            //append the querydef (it will be parsed!)
            // might throw if sql is incorrect
            db.QueryDefs.Append(qd);
        }

        db.Close();