小编lij*_*alo的帖子

我正在尝试 Dapper，偶然发现了这个异常：

System.InvalidOperationException: The ConnectionString property has not been initialized.
...

这是代码：

public IEnumerable<T> GetAll<T>(string sql, DynamicParameters parameters, string connectionString, CommandType commandType = CommandType.StoredProcedure)
{
    using IDbConnection db = new SqlConnection(connectionString);
    var result = db.Query<T>(sql, parameters, commandType: commandType, commandTimeout: COMMAND_TIMEOUT, buffered: false);
    return result;
}

当我删除buffered参数时，一切正常。

var result = db.Query<T>(sql, parameters, commandType: commandType, commandTimeout: COMMAND_TIMEOUT);