获取字符串VIN的最后4位＃ [英] Get string last 4 digits of VIN#

问题描述

我正在努力获取VIN＃的最后4位数字。我认为这会很简单，但由于某些原因我得到了一个outofrange异常错误。

  / *   * VIN的最后4位数＃** /  
  string  wholeVIN = record.vehicle.vehicleidentificationnumber; 
  string  lastFourOfVIN = wholeVIN.Substring（wholeVIN.Length  -   4 ，wholeVIN.Length-1 ）; 
 

解决方案

如果您对此类简单任务有疑虑，请始终使用调试器。只需阅读有关您正在使用的文档： https：// msdn .microsoft.com / zh-CN / library / aka44szs％28v = vs.110％29.aspx [ ^ ]。



如你所见，第二个参数是子串长度，所以它应该是4.（但绝不硬编码立即常量如4）。

-SA

第二个参数是子串的长度！

尝试

  / *   * VIN的最后4位＃** /  
  string  wholeVIN = record.vehicle.vehicleidentificationnumber; 
  string  lastFourOfVIN = wholeVIN.Substring（wholeVIN.Length  -   4 ， 4 ）; 

I am working on getting the last 4 digits of a VIN #. I thought it would be something simple but for some reason i am getting a outofrange exception error.

/** Last 4 digits of VIN # **/
string wholeVIN = record.vehicle.vehicleidentificationnumber;
string lastFourOfVIN = wholeVIN.Substring(wholeVIN.Length - 4, wholeVIN.Length-1);

解决方案

If you have concerns with such simple tasks, always use the debugger. And just read the documentation on what you are using: https://msdn.microsoft.com/en-us/library/aka44szs%28v=vs.110%29.aspx[^].

As you can see, the second parameter is the the sub-string length, so it should be 4. (But never hard-code immediate constants like 4.)

—SA

Second parameter is length of substring !
Try

/** Last 4 digits of VIN # **/
string wholeVIN = record.vehicle.vehicleidentificationnumber;
string lastFourOfVIN = wholeVIN.Substring(wholeVIN.Length - 4, 4);

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