How to get the current login user name in my Script file inside my asp.net mvc

Question

I have a script file that makes a call to JSON API, and I need to send the current login username as part of the call. I tried the following :-

    $(document).ready(function () {
        var name = prompt("Please enter your packageid", "test");

        var fullurl = 'http://localhost:8080/jw/web/json/workflow/process/list?j_username=kermit&hash=9449B5ABCFA9AFDA36B801351ED3DF66&loginAs=' + HttpContext.Current.User.Identity.Name + 'packageId=' + name;
        $.ajax({
            type: "GET",
            url: fullurl,
            dataType: "JSONP",
            success: function (result) {
//code goes here

But it will raise the following error:- 'HttpContext' is undefined

Eonasdan · Accepted Answer · 2012-10-10 13:25:02Z

20

Your script is looking for a Javascript variable called HttpContext Your code should be

@HttpContext.Current.User.Identity.Name

in Razor

so the javascript becomes

 var fullurl = 'http://localhost:8080/jw/web/json/workflow/process/list?j_username=kermit&hash=9449B5ABCFA9AFDA36B801351ED3DF66&[email protected]&packageId=' + name;

You're also missing and & between the user name and packageId if you intended for them to be separate variables

Edit: based on your comment and this being inside of a js file (which I guess I missed in the OP)

Two options:

Is to hold the username inside a variable on the page calling the script file. Like this:

Page

<script>
var usrName = "@HttpContext.Current.User.Identity.Name";
</script>

JS file

....&loginAs='+ usrName + '&packageId=' + name;

Option Two is to not include the username at all and just get it from the Action. This is only an option if the page you're posting to is on the same app

edited Oct 10, 2012 at 13:25

answered Oct 10, 2012 at 13:14

Eonasdan

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5 Comments

John John Over a year ago

you mean i should write the javascript inside the razor and not inside the Scripts folder.?.

Mario S Over a year ago

@johnG, yes, that's what he means.

John John Over a year ago

then there is no way to get the username from inside my .js file?

John John Over a year ago

@Eonasdan but how i can pass the variable to the script,, i do not think it will work if i write <script> var usrName = "@HttpContext.Current.User.Identity.Name"; </script> in my razor view. can you post a complete code -if possible-

Eonasdan Over a year ago

did you try it? because I do that all the time. As long as var usrName comes first - before the .js file it will work

Chandra Sekhar Walajapet · Accepted Answer · 2012-10-10 13:24:12Z

3

$(document).ready(function () {
    var name = prompt("Please enter your packageid", "test");

    var fullurl = 'http://localhost:8080/jw/web/json/workflow/process/list?j_username=kermit&hash=9449B5ABCFA9AFDA36B801351ED3DF66&loginAs=' + <%= HttpContext.Current.User.Identity.Name %> + 'packageId=' + name;
    $.ajax({
        type: "GET",
        url: fullurl,
        dataType: "JSONP",
        success: function (result) {

the above code should work, on the javascript front you will not have access to HTTPContent object which is available only on the server, but putting them in a server code you should be able to access the same.

or you can have a hidden control with the value set from the server

<input type='hidden' id='uid' runat='server'>

server code would look like

uid.value = HTTPContext.Current.User.Identity.Name;

answered Oct 10, 2012 at 13:24

Chandra Sekhar Walajapet

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12 Comments

Chandra Sekhar Walajapet Over a year ago

i strongly suggest you relook at passing user id as a parameter, its not a suggested practice.

John John Over a year ago

why but how i can integrate with other system instead ?, as i am sending a API request to return JSON from another application. so i have to send the username in my request.

Chandra Sekhar Walajapet Over a year ago

at first please let me know the answer i gave works for you :) , second you should look at passing a token instead of exposing your userid, where the token should be generated on your server side.

John John Over a year ago

thanks for your alert, but the web service i am integrating with expect a loginAs parameter to make the call, and it does not have a parameter for the token. baring in mind that i do not own the system i am integrating with.. any suggestions.?

Chandra Sekhar Walajapet Over a year ago

is there a possibility for you to do an AJAX call to your server and your server gets the required info for you ? by that you would not be exposing your user id to the external world. using a WebRequest Class get WebResponse ?

|

Mario S · Accepted Answer · 2012-10-10 13:18:58Z

1

You can use just User.Identity.Name that's derived from System.Web.WebPages.WebPageRenderingBase (that means the code should be in a View-file). You can't access server-side code directly in script-files.

 $(document).ready(function () {
        var name = prompt("Please enter your packageid", "test");

        var fullurl = 'http://localhost:8080/jw/web/json/workflow/process/list?j_username=kermit&hash=9449B5ABCFA9AFDA36B801351ED3DF66&[email protected]&packageId=' + name;
        $.ajax({
            type: "GET",
            url: fullurl,
            dataType: "JSONP",
            success: function (result) {
//code goes here

edited Oct 10, 2012 at 13:18

answered Oct 10, 2012 at 13:13

Mario S

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7 Comments

John John Over a year ago

this will raise "Microsoft JScript runtime error: 'User' is undefined" error.

Eonasdan Over a year ago

as I suggest you need to make Razor render this into your javascript instead of asking javascript for it

Mario S Over a year ago

Is the script in a view or a js-file?

John John Over a year ago

in a separate script file under the Scripts folder, and i am just calling this script file in my razor.

Mario S Over a year ago

@johnG Then you should put this code in a script-tag in say your _layout.cshtml file or other view-file.

|

dove · Accepted Answer · 2012-10-10 13:21:01Z

1

You will have to set a javascript variable in your view (.cshtml) using razor and then use this in your script file (.js)

So in your view:

<script type="text/javascript">    
            var userName = '@HttpContext.Current.User.Identity.Name';            
</script>

and then your script file

   var fullurl = '....loginAs=' + userName  + 'packageId=' + name;

edited Oct 10, 2012 at 13:21

answered Oct 10, 2012 at 13:13

dove

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2 Comments

John John Over a year ago

thanks for the reply, but what you mean by "to set a javascript variable in your view". i did not perform such thing before?

dove Over a year ago

updated answer, Razor will not be interpreted by compiler in your .js files but it will in your .cshtml files. Thus have the above script in your view and then use userName in your script

user2315057 · Accepted Answer · 2020-07-24 04:37:55Z

1

    @User.Identity.Name

You can directly access user identity in script section by prefixing @

    @User.FindFirst(ClaimTypes.NameIdentifier).Value

also a good option.

edited Jul 24, 2020 at 4:37

answered Jul 24, 2020 at 2:20

user2315057

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Comments

Annia Martinez · Accepted Answer · 2016-02-12 16:04:59Z

0

var usrName = '<%[email protected]%>'

answered Feb 12, 2016 at 16:04

Annia Martinez

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3 Comments

Alexei - check Codidact Over a year ago

Please, also provide a minimum explanation.

Annia Martinez Over a year ago

I think that is self explanatory:)

Alexei - check Codidact Over a year ago

This answer is already provided by Eonasdan. He explains that this makes sense only in Razor (cshtml) only and how to pass it in a script outside of the view.

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