关于c＃：从MS Access批量复制到SQL Server

Bulk copy from MS Access to SQL Server

我正在尝试将表从MS Access数据库复制到SQL Server数据库中。

这是代码：

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private static void BulkCopyAccessToSQLServer(string sql, string destinationTable,string fileName)
{
using (DataTable dt = new DataTable())
{
using (OleDbConnection conn = new OleDbConnection(String.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0}", fileName)))
using (OleDbCommand cmd = new OleDbCommand(sql, conn))
using (OleDbDataAdapter adapter = new OleDbDataAdapter(cmd))
{
cmd.Connection.Open();
adapter.SelectCommand.CommandTimeout = 240;
adapter.Fill(dt);
adapter.Dispose();
}
using (SqlConnection conn2 = new SqlConnection(connStr))
{
conn2.Open();
using (SqlBulkCopy copy = new SqlBulkCopy(conn2))
{
copy.DestinationTableName = destinationTable;
copy.BatchSize = 1000;
copy.BulkCopyTimeout = 240;
copy.WriteToServer(dt);
copy.NotifyAfter = 1000;
}
}
}
}

像这样调用这个函数…

1	BulkCopyAccessToSQLServer("select * from Table1","Table1","C:\\db.??accdb");

我得到以下错误：

System.Data.OleDb.OleDbException: Could not find file 'C:\db.??accdb'.
at System.Data.OleDb.OleDbConnectionInternal..ctor(OleDbConnectionString
constr, OleDbConnection connection)
at System.Data.OleDb.OleDbConnectionFactory.CreateConnection(DbConnectionOptions
options, Object poolGroupProviderInfo, DbConnectionPool pool,
DbConnection owningObject)
at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection
owningConnection, DbConnectionPoolGroup poolGroup)
at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection
owningConnection)
at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection
outerConnection, DbConnectionFactory connectionFactory)
at System.Data.OleDb.OleDbConnection.Open()
at WebService.BulkCopyAccessToSQLServer(String sql, String destinationTable, String fileName)
at WebService.Import()

我做错什么了？