系统.发布到azure时的NullReferenceException
本文关键字:时的 NullReferenceException azure 系统 | 更新日期: 2023-09-27 17:50:52
你好,我已经发布了我的网站,该网站从visual studio本地分支到Azure,现在每次我试图访问该页面时,我都会得到以下例外。
[NullReferenceException: Object reference not set to an instance of an object.]
WebApplication1.Logic.RoleActions.AddUserAndRole() +390
WebApplication1.Global.Application_Start(Object sender, EventArgs e) +47
因为它指向逻辑。RoleActions和Global。Application_Start我将post code在那些
RoleActions
namespace WebApplication1.Logic
{
internal class RoleActions
{
internal void AddUserAndRole()
{
// Access the application context and create result variables.
Models.ApplicationDbContext context = new ApplicationDbContext();
IdentityResult IdRoleResult;
IdentityResult IdUserResult;
// Create a RoleStore object by using the ApplicationDbContext object.
// The RoleStore is only allowed to contain IdentityRole objects.
var roleStore = new RoleStore<IdentityRole>(context);
// Create a RoleManager object that is only allowed to contain IdentityRole objects.
// When creating the RoleManager object, you pass in (as a parameter) a new RoleStore object.
var roleMgr = new RoleManager<IdentityRole>(roleStore);
// Then, you create the "canEdit" role if it doesn't already exist.
if (!roleMgr.RoleExists("canEdit"))
{
IdRoleResult = roleMgr.Create(new IdentityRole { Name = "canEdit" });
}
// Create a UserManager object based on the UserStore object and the ApplicationDbContext
// object. Note that you can create new objects and use them as parameters in
// a single line of code, rather than using multiple lines of code, as you did
// for the RoleManager object.
var userMgr = new UserManager<ApplicationUser>(new UserStore<ApplicationUser>(context));
var appUser = new ApplicationUser
{
UserName = "canEditUser@wingtiptoys.com",
Email = "canEditUser@wingtiptoys.com"
};
IdUserResult = userMgr.Create(appUser, "Pa$$word1");
// If the new "canEdit" user was successfully created,
// add the "canEdit" user to the "canEdit" role.
if (!userMgr.IsInRole(userMgr.FindByEmail("canEditUser@wingtiptoys.com").Id, "canEdit"))
{
IdUserResult = userMgr.AddToRole(userMgr.FindByEmail("canEditUser@wingtiptoys.com").Id, "canEdit");
}
if (!userMgr.IsInRole(userMgr.FindByEmail("kasi64@seznam.cz").Id, "canEdit"))
{
IdUserResult = userMgr.AddToRole(userMgr.FindByEmail("kasi64@seznam.cz").Id, "canEdit");
}
}
}
}
全球和
namespace WebApplication1
{
public class Global : HttpApplication
{
void Application_Start(object sender, EventArgs e)
{
// Code that runs on application startup
RouteConfig.RegisterRoutes(RouteTable.Routes);
BundleConfig.RegisterBundles(BundleTable.Bundles);
// Create the custom role and user.
RoleActions roleActions = new RoleActions();
roleActions.AddUserAndRole();
}
}
}
我不明白为什么它在本地工作得很好,但在发布时却是一个问题。谢谢你
NullReferenceException
很可能是由userMgr.FindByEmail("xxx")
调用之一引起的。你不处理的情况下,userMgr.FindByEmail
方法返回null,你直接访问它的Id
属性。
我怀疑这是因为在Azure中没有使用kasi64@seznam.cz电子邮件的用户。因此,在这一行调用Id将抛出空引用异常。
userMgr.FindByEmail("kasi64@seznam.cz").Id