This example shows how to insert ,update, delete and select data in Access File(CRUD Operations).

• Firstly, you should install Microsoft Access Database Engine.
  • https://www.microsoft.com/en-us/download/details.aspx?id=13255
• Then, we can use System.Data API.
• The database in the sample file contains a table that has a name “TABLE1”.

TABLE1:

Select Command Example:

            
            string mdfFile = @"csharpexamples.mdb";

            using (OleDbConnection connection = new OleDbConnection(string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0}", mdfFile)))
            {
                using (OleDbCommand selectCommand = new OleDbCommand("SELECT TOP 10 * FROM TABLE1", connection))
                {
                    connection.Open();

                    DataTable table = new DataTable();
                    OleDbDataAdapter adapter = new OleDbDataAdapter();
                    adapter.SelectCommand = selectCommand;
                    adapter.Fill(table);

                    foreach (DataRow row in table.Rows)
                    {
                        object nameValue = row["NAME"];
                        object surnameValue = row["SURNAME"];
                    }
                }
            }

Insert Command Example:

            
            string mdfFile = @"csharpexamples.mdb";

            using (OleDbConnection connection = new OleDbConnection(string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0}", mdfFile)))
            {
                using (OleDbCommand insertCommand = new OleDbCommand("INSERT INTO TABLE1 ([NAME],[SURNAME]) VALUES (?,?)", connection))
                {
                    connection.Open();

                    insertCommand.Parameters.AddWithValue("@NAME", "Brad");
                    insertCommand.Parameters.AddWithValue("@SURNAME", "Pitt");

                    insertCommand.ExecuteNonQuery();
                }
            }

Update Command Example:

      
            string mdfFile = @"csharpexamples.mdb";

            using (OleDbConnection connection = new OleDbConnection(string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0}", mdfFile)))
            {
                using (OleDbCommand updateCommand = new OleDbCommand("UPDATE TABLE1 SET [NAME] = ?, [SURNAME] = ? WHERE [ID] = ?", connection))
                {
                    connection.Open();

                    updateCommand.Parameters.AddWithValue("@NAME", "Brad2");
                    updateCommand.Parameters.AddWithValue("@SURNAME", "Pitt2");
                    updateCommand.Parameters.AddWithValue("@ID", 2);

                    updateCommand.ExecuteNonQuery();
                }
            }      

Delete Command Example:

            
            string mdfFile = @"csharpexamples.mdb";

            using (OleDbConnection connection = new OleDbConnection(string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0}", mdfFile)))
            {
                using (OleDbCommand deleteCommand = new OleDbCommand("DELETE FROM TABLE1 WHERE [ID] = ?", connection))
                {
                    connection.Open();

                    deleteCommand.Parameters.AddWithValue("@ID", 2);

                    deleteCommand.ExecuteNonQuery();
                }
            }

See Also: Select,Insert,Update,Delete Data in MySQL using C#