Conversion from Int to String

Question

I have a login page that Username is the emaloyee ID which is an Integer. however to validate my loging I need to convert it to string, but it continuesly give me same error.

I need help here: var user = db.EMPLOYEEs.Where(u => u.EMP_ID == model.EMP_ID && u.EMP_PASSWORD == model.EMP_PASSWORD).FirstOrDefault();

I have tried all of these but sill give me same error :

string s = i.ToString();
string s = Convert.ToString(i);
string s = string.Empty + i;
string s = new StringBuilder().Append(i).ToString();

enter image description here

I get another error down on

serializeModel.roles = user.RoleROLE_ID; error: Cannot implicitly convert type 'int' to 'string[]'

what I suppose to do with this one?

enter image description here

here is my code :

 [HttpPost]
        public ActionResult Login(LoginModel model, string returnUrl = "")
        {
            if (ModelState.IsValid)
            {
                int modelID = int.Parse(model.EMP_ID);
                var user = db.EMPLOYEEs.Where(u => u.EMP_ID == modelID && u.EMP_PASSWORD == model.EMP_PASSWORD).FirstOrDefault();
                    if ( user !=null)
                {
                    var roles = db.EMPLOYEEs.Select(m => m.RoleROLE_ID).ToArray();

                    CustomPrincipalSerializeModel serializeModel = new CustomPrincipalSerializeModel();
                    serializeModel.UserId = user.EMP_ID;
                    serializeModel.FirstName = user.EMP_FIRST_NAME;
                    serializeModel.LastName = user.EMP_LAST_NAME;
                    serializeModel.roles = user.RoleROLE_ID;

When complaining about an error, it's a good idea to mention what the error is. — Kirk Woll
– Kirk Woll, Commented Apr 17, 2014 at 15:25

Michał · Accepted Answer · 2014-04-17 15:35:36Z

1

From the screen I would assume you should convert the u.EMP_ID, not the model.EMP_ID

You can also go with Int.Parse(model.EMP_ID)

To keep it readable and efficient I would go with:

int modelID = Int.Parse(model.EMP_ID);
var user = db.EMPLOYEEs.Where(u => u.EMP_ID == modelID && u.EMP_PASSWORD == model.EMP_PASSWORD).FirstOrDefault();

First of all, you parse only once. Secondly, you compare ints which is a lot faster.

edited Apr 17, 2014 at 15:35

answered Apr 17, 2014 at 15:30

Michał

2,2923 gold badges22 silver badges33 bronze badges

Sign up to request clarification or add additional context in comments.

6 Comments

SamR Over a year ago

thank you I get another error down on serializeModel.roles = user.RoleROLE_ID; error: Cannot implicitly convert type 'int' to 'string' what I suppose to do with this one?

Michał Over a year ago

@NilR either: serializeModel.roles.ToString() or Int.Parse(user.RoleROLE_ID). The first option should be faster if you set an additional variable to hold result for that.

SamR Over a year ago

I can't the first one give me errors and don't take them :(

Michał Over a year ago

@NilR edit your question to provide more info on that or create new one. I don't know what happens from such a short description.

Michał Over a year ago

@NilR you try to assign a number to an array. Do you want to add this int to the array or what?

|

D Stanley · Accepted Answer · 2014-04-17 15:26:38Z

0

just pull that conversion out of the Where clause:

string empID = Convert.ToString(model.EMP_ID);
var user = db.EMPLOYEEs
             .Where(u => u.EMP_ID == empID && u.EMP_PASSWORD == model.EMP_PASSWORD)
             .FirstOrDefault();

answered Apr 17, 2014 at 15:26

D Stanley

153k12 gold badges189 silver badges257 bronze badges

2 Comments

SamR Over a year ago

it didn't have at the first place before error and I changed to this one but still doesn't work...

SamR Over a year ago

i did this : int modelID = Int.Parse(model.EMP_ID); var user = db.EMPLOYEEs.Where(u => u.EMP_ID and worked fine; however I have another error that down on serializeModel.roles = user.RoleROLE_ID; error: Cannot implicitly convert type 'int' to 'string' what I suppose to do with this one?

Collectives™ on Stack Overflow

Conversion from Int to String

2 Answers 2

6 Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

6 Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related