空引用异常未处理?错误 [英] Null Reference Excepion was Unhandled ? ERROR

问题描述

这是我用sql表填充数据集表的代码

this is my code to fill my dataset table with the sql table

private void Main_form_Load(object sender, EventArgs e)
{
    this.costumer_memberTableAdapter.Fill(this.sarsdatabaseDataSet.Costumer_member);
    this.flight_ReservationTableAdapter.Fill(this.sarsdatabaseDataSet.Flight_Reservation);
    this.car_ReservationTableAdapter.Fill(this.sarsdatabaseDataSet.Car_Reservation);
    this.car_InforamtionTableAdapter.Fill(this.sarsdatabaseDataSet.Car_Inforamtion);
    this.car_InforamtionTableAdapter.Fill(this.sarsdatabaseDataSet.Car_Inforamtion);
    this.costumer_memberTableAdapter.Fill(this.sarsdatabaseDataSet.Costumer_member);
    this.hotel_InforamtionTableAdapter1.Fill(this.sarsdatabaseDataSet.Hotel_Inforamtion);
    this.hotel_ReservationTableAdapter.Fill(this.sarsdatabaseDataSet.Hotel_Reservation);
    flight_informationTableAdapter.Fill(sarsdatabaseDataSet.Flight_information);
    Login_Form m = new Login_Form(this);
    m.ShowDialog();
    this.Hide();           
}

但是！！！
出现一个表示
的异常错误 ("未处理空引用异常
对象引用未设置为对象的实例")

但我的表都不为空，这是什么错误，我该如何解决
在Advance中致谢

but!!!
there an Exception error that said
(''"Null Reference Exception Was Unhandled
Object reference not set to an instance of an object''")

but none of my table is null , what is this error and how can i solve it
Thanks in Advance

推荐答案

您将不得不告诉我们哪一行引发了异常.

将您的代码放在try/catch块中，然后在调试器下运行它以找出问题所在.我敢打赌，您将能够找到自己的答案.

You''re going to have to tell us which line is throwing the exception.

Put your code in a try/catch block, and run it under the debugger to find out where the problem is. I bet you''ll be able to find your own answer.

这种错误无需发布.通过使用try和catch或放置断点并开始调试，可以轻松地跟踪它.您必须学习如何调试代码.

问候，
爱德华(Eduard)

This kind of error doesn''t need to be posted. It can be easily traced by using try and catch or by putting breakpoints and start debugging. You must learn how to debug your code.

Regards,
Eduard

您所有的this.xxx_memberTableAdapter是否存在/已实例化?
您所有的this.sarsdatabaseDataSet.xxx_member是否存在/被实例化?

Do all yours this.xxx_memberTableAdapter exist/are instantiated?
Do all yours this.sarsdatabaseDataSet.xxx_member exist/are instantiated?

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