如何分配值到C＃中的數組＃

Question

首先根據登錄用戶獲取角色名稱。之後，根據角色從數據庫中獲取功能代碼。我需要將sql結果分配到Array，但保持顯示錯誤can't convert from string to string[]

public override string[] GetRolesForUser(string username) 
    { 
     DEV_Context OE = new DEV_Context(); 
     string role = OE.UserRefs.Where(x => x.UserName == username).FirstOrDefault().RoleName; 

     string[] permission = OE.RolePermissionRefs.Where(x => x.RoleName == role).FirstOrDefault().FunctionCode; 
     string[] result={permission}; 

     return result; 
    } 

Answer 1

您需要的字符串數組，所以不是使用FirstOrDefault，使用Select比ToArray方法。

你的方法應該看起來像

public override string[] GetRolesForUser(string username) 
{ 
    DEV_Context OE = new DEV_Context(); 
    string role = OE.UserRefs.Where(x => x.UserName == username).FirstOrDefault().RoleName; 

    string[] result= OE.RolePermissionRefs.Where(x => x.RoleName == role).Select(x=>x.FunctionCode).ToArray(); 

    return result; 
}