An unhandled exception occurred
while
processing the request.
<div
class
=
"
titleerror"
>InvalidOperationException: Unable to resolve service
for
type
'
TabDataAccess.Repositories.RepositoryTab`1[TabDataAccess.Dto.Employee]'
while
attempting to activate
'
WebTabCore.Controllers.EmployeeController'
.
</
div
>
Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp, Type type, Type requiredBy,
bool
isDefaultParameterRequired)
<div id=
"
stackpage"
class
=
"
page"
>
InvalidOperationException: Unable to resolve service
for
type
'
TabDataAccess.Repositories.RepositoryTab`1[TabDataAccess.Dto.Employee]'
while
attempting to activate
'
WebTabCore.Controllers.EmployeeController'
.
what i
do
as
following
An unhandled exception occurred
while
processing the request.
InvalidOperationException: Unable to resolve service
for
type
'
TabDataAccess.Repositories.RepositoryTab`1[TabDataAccess.Dto.Employee]'
while
attempting to activate
'
WebTabCore.Controllers.EmployeeController'
.
Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp, Type type, Type requiredBy,
bool
isDefaultParameterRequired)
InvalidOperationException: Unable to resolve service
for
type
'
TabDataAccess.Repositories.RepositoryTab`1[TabDataAccess.Dto.Employee]'
while
attempting to activate
'
WebTabCore.Controllers.EmployeeController'
.
what i
do
as
following what i
do
as
below
What I have tried:
<pre>public
class
Employee
public
int
EmployeeId {
get
;
set
; }
public
int
BranchCode {
get
;
set
; }
public
string
EmployeeName {
get
;
set
; }
public
int
EmployeeAge {
get
;
set
; }
Repository
public
class
RepositoryTab<T> : IrepositoryTab<T>
where
T :
class
protected
TabDbContext db {
get
;
set
; }
private
DbSet<T> dbSet;
public
RepositoryTab(TabDbContext Tabdb)
db = Tabdb;
dbSet = db.Set<T>();
public
IEnumerable<T> GetAll()
return
dbSet.ToList();
public
interface
IrepositoryTab<T>
where
T :
class
IEnumerable<T> GetAll();
configureservices
services.AddDbContext<TabDbContext>(options =>
options.UseSqlServer(Configuration.GetConnectionString(
"
DefaultConnection"
)));
appsetting.json
"
ConnectionStrings"
: {
"
DefaultConnection"
:
"
Server=.\\SQL2014;Database=ErpWeb;uid=sa;pwd=abc123;ConnectRetryCount=0;"
why
this
exceptioh happen
It might be that you haven't registered you mapping from
IRepositoryTab
to
RepositoryTab
But most likely what you need is to specify interface instead of concrete parameter as your consturctor parameter
public
EmployeeController(IRepositoryTab<employee> emp)
this
._repository = emp;
Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad
spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or
edit the question
and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it.
Provide an answer or move on to the next question.
Let's work to help developers, not make them feel stupid.
