Pertanyaan yang diberi tag «invalidoperationexception»

Ada paradoks dalam deskripsi pengecualian: Objek nullable harus memiliki nilai (?!) Ini masalahnya: Saya punya DateTimeExtendedkelas, ya sudah { DateTime? MyDataTime; int? otherdata; } dan seorang konstruktor DateTimeExtended(DateTimeExtended myNewDT) { this.MyDateTime = myNewDT.MyDateTime.Value; this.otherdata = myNewDT.otherdata; } menjalankan kode ini DateTimeExtended res = new DateTimeExtended(oldDTE); melempar InvalidOperationExceptiondengan pesan: Objek nullable …

190 c#  nullable  invalidoperationexception 

Server Error in '/' Application. -------------------------------------------------------------------------------- No parameterless constructor defined for this object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.MissingMethodException: No parameterless constructor …

172 asp.net-mvc  invalidoperationexception