因为这是下面的代码中创建的最后一个用户，所以它仅创建一个ADMIN用户。即使我逐步执行，一切都成功。这与我做异步错误并且没有完成第一个操作有关吗？（创建用户）
public class DbInitializer
{
public static async void Initialize(IApplicationBuilder app)
// public static void Initialize(IApplicationBuilder app)
……
if (!roleManager.RoleExistsAsync("Administrator").Result)
{
IdRoleResult = await roleManager.CreateAsync(new IdentityRole("Administrator"));
// IdRoleResult = roleManager.CreateAsync(new IdentityRole("Administrator")).Result;
if (!IdRoleResult.Succeeded)
throw new Exception("Administrator role wasnt created.");
}
if (!roleManager.RoleExistsAsync("User").Result)
{
IdUserResult = await roleManager.CreateAsync(new IdentityRole("User"));
// IdUserResult = roleManager.CreateAsync(new IdentityRole("User")).Result;
if (!IdUserResult.Succeeded)
throw new Exception("User role wasnt created.");
}
//If there are no users, create a test user and test admin. Assign roles
if (!context.Users.Any())
{
var user = new ApplicationUser
{
UserName = "[email protected]",
UserFirstName = "Firstname",
UserLastName = "LastName",
Email = "[email protected]",
UserSchool = "University of Maryland",
RefMedSchoolId = 1,
EmailConfirmed = false,
LockoutEnabled = false
};
// var resultUser = userManager.CreateAsync(user, "Password123!").Result;
// var resultUserRole = userManager.AddToRoleAsync(user, "User").Result;
var resultUser = await userManager.CreateAsync(user, "Password123!");
var resultUserRole = await userManager.AddToRoleAsync(user, "User");
var admin = new ApplicationUser
{
UserName = "[email protected]",
UserFirstName = "Firstname",
UserLastName = "LastName",
Email = "[email protected]",
UserSchool = "University of Maryland",
RefMedSchoolId = 1,
EmailConfirmed = false,
LockoutEnabled = false
};
// var resultAdmin = userManager.CreateAsync(admin, "Password123!").Result;
// var resultAdministratorRole = userManager.AddToRoleAsync(admin, "Administrator").Result;
var resultAdmin = await userManager.CreateAsync(admin, "Password123!");
var resultAdministratorRole = await userManager.AddToRoleAsync(admin, "Administrator");
这段代码应始终保持异步状态，而不是将异步和阻塞调用混为一谈.Result。方法签名也应该async Task不是async void。
public class DbInitializer {
public static async Task Initialize(IApplicationBuilder app) {
//... ...
if (! await roleManager.RoleExistsAsync("Administrator")) {
IdRoleResult = await roleManager.CreateAsync(new IdentityRole("Administrator"));
if (!IdRoleResult.Succeeded)
throw new Exception("Administrator role wasnt created.");
}
if (! await roleManager.RoleExistsAsync("User")) {
IdUserResult = await roleManager.CreateAsync(new IdentityRole("User"));
if (!IdUserResult.Succeeded)
throw new Exception("User role wasnt created.");
}
//If there are no test user, create a test user and assign roles
if (await userManager.FindByNameAsync("[email protected]") == null) {
var user = new ApplicationUser {
UserName = "[email protected]",
UserFirstName = "Firstname",
UserLastName = "LastName",
Email = "[email protected]",
UserSchool = "University of Maryland",
RefMedSchoolId = 1,
EmailConfirmed = false,
LockoutEnabled = false
};
var resultUser = await userManager.CreateAsync(user, "Password123!");
var resultUserRole = await userManager.AddToRoleAsync(user, "User");
}
//If there are no test admin, create a test admin and assign roles
if (await userManager.FindByNameAsync("[email protected]") == null) {
var admin = new ApplicationUser {
UserName = "[email protected]",
UserFirstName = "Firstname",
UserLastName = "LastName",
Email = "[email protected]",
UserSchool = "University of Maryland",
RefMedSchoolId = 1,
EmailConfirmed = false,
LockoutEnabled = false
};
var resultAdmin = await userManager.CreateAsync(admin, "Password123!");
var resultAdministratorRole = await userManager.AddToRoleAsync(admin, "Administrator");
}
//...
}
}
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