C# adapter.update未写入access

有人能告诉我为什么下面的代码不会将数据提交到access数据库表吗

如果我查看dtAccess数据表，它会正确显示我希望写入Access的内容，但当我访问并查看该表时，没有写入任何内容

OleDbConnection myConnection = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=\"C:\\Database.accdb\";Persist Security Info=False;");

string queryString = "SELECT * from " + lblTable.Text;

//OleDbDataAdapter adapter = new OleDbDataAdapter(queryString, myConnection);
OleDbDataAdapter adapter = new OleDbDataAdapter();

DataTable dtAccess = new DataTable();
DataTable dtCSV = new DataTable();

dtCSV = ds.Tables[0];

// OleDbCommand cmd = new OleDbCommand("INSERT INTO " + lblTable.Text + "(ASIN) VALUES (1234)", myConnection);  //this command works when used with cmd.executenonquery();

adapter.SelectCommand = new OleDbCommand("SELECT * from " + lblTable.Text, myConnection);
adapter.InsertCommand = new OleDbCommand("INSERT INTO " + lblTable.Text + " ([ASIN], [MAP Retail], [Style Number], [MSRP Retail]) VALUES (?,?,?,?)", myConnection);

myConnection.Open();

adapter.Fill(dtAccess);
dtAccess.Merge(dtCSV);
adapter.Update(dtAccess);

myConnection.Close();

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在合并操作之后，您是否检查了dataTable中是否有新的或修改的行？Access表是否也有主键？Access中的表为空，并且有一个作为主键的自动增量字段。