C＃DataTable更新访问数据库

Question

如何将DataTable保存到文件中。 accdb（Access）现有的一个？我用下面的代码，它不工作：

using (OleDbConnection oledbConnection = new OleDbConnection(connection)) 
{ 
    oledbConnection.Open(); 
    string query = "SELECT * FROM Student"; 
    using (OleDbCommand oledbCommand = new OleDbCommand(query, oledbConnection)) 
    { 
     using (OleDbDataAdapter oledbDataAdapter = new OleDbDataAdapter(oledbCommand)) 
     { 
     using (OleDbCommandBuilder oledbCommandBuilder = new OleDbCommandBuilder(oledbDataAdapter)) 
     { 
      oledbDataAdapter.DeleteCommand = oledbCommandBuilder.GetDeleteCommand(true); 
      oledbDataAdapter.InsertCommand = oledbCommandBuilder.GetInsertCommand(true); 
      oledbDataAdapter.UpdateCommand = oledbCommandBuilder.GetUpdateCommand(true); 
      oledbDataAdapter.Update(dataTable); 
     } 
     } 
    } 
    oledbConnection.Close(); 
} 

变量数据表上初始化文件的原始内容，然后将其修改通过添加行，我现在有更新的表数据库。

我尝试使用下面的代码，但是，这并不工作:(

OleDbDataAdapter da = new OleDbDataAdapter("SELECT * FROM Student", connection); 
OleDbCommandBuilder cmdBuilder = new OleDbCommandBuilder(da); 
da.InsertCommand = cmdBuilder.GetInsertCommand(true); 
// create and insert row in the DataTable 
da.Update(dataTable); 

Answer 1

假设你已经在数据表中的一些变化，那么你可以通过生成的更新/插入/删除命令到适配器以这种方式

oledbDataAdapter.DeleteCommand = oledbCommandBuilder.GetDeleteCommand(); 
oledbDataAdapter.InsertCommand = oledbCommandBuilder.GetInsertCommand(); 
oledbDataAdapter.UpdateCommand = oledbCommandBuilder.GetUpdateCommand(); 
oledbDataAdapter.Update(datatable); 

适配器现在知道如何如果发出`dataTable.GetChanges（更新表格