如果信息不正确，如何防止保存两个功能。 [英] How Do I Prevent The Two Functions From Saving If One Has Incorrect Information.

问题描述

Business_Logic.Employee objt = new Business_Logic.Employee（）;



objt.Position_Number = TxtPositionNum.Text;

objt.Grade = Txtgrade.Text;

objt.StartDate = TxtStartDate.Text;



objt.Save_Position（）;









Business_Logic.Employee obje = new Business_Logic.Employee（）;

obje.Position_Number = TxtPositionNum.Text;

obje.Cell_Number = TxtCellNumber.Text;

obje.Email = TxtEmail.Text;



obje.Save_Employee（）;

Business_Logic.Employee objt = new Business_Logic.Employee();

objt.Position_Number = TxtPositionNum.Text;
objt.Grade = Txtgrade.Text;
objt.StartDate = TxtStartDate.Text;

objt.Save_Position();




Business_Logic.Employee obje = new Business_Logic.Employee();
obje.Position_Number = TxtPositionNum.Text;
obje.Cell_Number = TxtCellNumber.Text;
obje.Email = TxtEmail.Text;

obje.Save_Employee();

推荐答案

修改Save_Position方法以返回bool值：true表示确定，false表示发生错误

然后检查你的代码：

Modify the Save_Position method to return a bool value: true for OK, false for "an error occured"
Then check in your code:

objt.Position_Number = TxtPositionNum.Text;
objt.Grade = Txtgrade.Text;
objt.StartDate = TxtStartDate.Text;
 
if (objt.Save_Position())
    {
    Business_Logic.Employee obje = new Business_Logic.Employee(); 
    obje.Position_Number = TxtPositionNum.Text;
    obje.Cell_Number = TxtCellNumber.Text;
    obje.Email = TxtEmail.Text;
    
    obje.Save_Employee();
    }

或者，在Save_Position方法中抛出异常，并在调用片段的代码中捕获它。然后它可以向用户报告问题。

Alternatively, throw an exception in your Save_Position method, and catch it in the code which calls your fragment. It can then report a problem to the user.

使用flag变量检查是否发生错误。如果没有错误，则保存代码，否则忽略它。

Use the flag variable to check whether error is occurred or not. If there no error then save the code otherwise ignore it.

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