使用C#将表从一个MS Access数据库传输到另一个

Question

我有两个几乎相同的数据库(都是*.mdb),但其中一个有很少的新表.现在,我只能使用以下代码检测应导入的表:

    public static List<string> GetDBTables(string path)
    {
        List<string> allTables = new List<string>();
        String connect = ("Provider=Microsoft.JET.OLEDB.4.0;data source=" 
                                     + path + ";Persist Security Info=False;");

        OleDbConnection con = new OleDbConnection(connect);
        con.Open();

        DataTable tables = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, 
                                     new object[] { null, null, null, "TABLE" });

        int counter = 1;
        foreach (DataRow row in tables.Rows)
        {
            allTables.Add(row[2].ToString());
            counter++;
        }
        con.Close();

        return allTables;
    }

    var withNewTables = GetDBTables(".\\one.mdb");
    var withoutNewTables = GetDBTables(".\\another.mdb");
    var NotFoundTables = withNewTables.Except(withoutNewTables).ToList();

如何使用C#在旧数据库中导入这些表？

Answer 1

Access SQL提供了两个在这里很有用的功能.

1. SELECT <field list> INTO NewTable
2. FROM table_name IN 'path to other db file'

所以,我可以从一个OLEDB连接到我的目标DB文件来执行这个语句,它会创建tblFoo_copy从包含在数据tblFoo在其他数据库文件,NewData.mdb.

SELECT f.* INTO tblFoo_copy
FROM tblFoo AS f IN 'C:\Users\hans\Documents\NewData.mdb';

为要导入的每个表构建并执行类似的语句.

Answer 2

好吧，除了 HansUp 的回答，我在 C# 上发布了这个实现：

public static void insertTables(string path_from, string path_to, 
                                                            List<string> _tables)
{
    string conString = ("Provider=Microsoft.JET.OLEDB.4.0;data source=" 
                                    + path_to + ";Persist Security Info=False;");
    OleDbConnection dbconn = new OleDbConnection(conString);
    dbconn.Open();
    OleDbCommand dbcommand = new OleDbCommand();

    _tables.ForEach(delegate(String name)
    {
        string selQuery = "SELECT f.* INTO " + name + " FROM " + name 
                                               + " AS f IN '" + path_from + "';";

        dbcommand.CommandText = selQuery;
        dbcommand.CommandType = CommandType.Text;
        dbcommand.Connection = dbconn;
        int result = dbcommand.ExecuteNonQuery();
    });

    dbconn.Close();
}

insertTables(".\\one.mdb", ".\\another.mdb", NotFoundTables);