在C#中将OleDbDataReader转换为DbDataReader,可以使用DbProviderFactory类的CreateCommand和CreateDataAdapter方法来实现。以下是一个示例代码:
using System.Data.Common;
using System.Data.OleDb;
// 创建OleDbDataReader
OleDbConnection oledbConnection = new OleDbConnection(connectionString);
OleDbCommand oledbCommand = new OleDbCommand(query, oledbConnection);
OleDbDataReader oledbDataReader = oledbCommand.ExecuteReader();
// 转换为DbDataReader
DbProviderFactory factory = DbProviderFactories.GetFactory(oledbConnection);
DbCommand dbCommand = factory.CreateCommand();
dbCommand.Connection = oledbConnection;
dbCommand.CommandText = query;
DbDataReader dbDataReader = dbCommand.ExecuteReader();
在上述代码中,首先创建了一个OleDbDataReader对象。然后通过DbProviderFactory类的CreateCommand方法创建一个DbCommand对象,并设置其Connection和CommandText属性。最后通过DbCommand的ExecuteReader方法获取一个DbDataReader对象,即将OleDbDataReader转换为DbDataReader。