How to return a List<string> from string parameters of action method MVC?

Question

I am working on MVC 5 project.

string hdPrimUserFirstReg = "{\"ProjectName\":\"wwwwwww\",\"ClientName\":\"asdw\",\"ProjectType\":\"2\",\"ProjectLocation\":\"asdfasdfs\",\"Status\":\"Completed\"},\"Form6\":null}","hdPremUserProject":"","hdclientLogo":"","hdProjectTitle":"","ProjectName":"eeeeeee","ClientName":"asdwedfswe","ProjectType":"1","ProjectLocation":"dfwea","Status":"Completed}";

I want to create a list of ProjectName from the variable hdPrimUserFirstReg JSON format data and also from the Form 5 into the public IList<string> listProjectName { get; set; }

And this is my java-script,

AddProjectList: function (e) {

        debugger;
        if (this.validateForm()) {
            debugger;
            var hidvalue = $('#hdPrimUserFirstReg').val();//// hidden field from same form 
            var hidJson = JSON.parse(hidvalue);
            var json = {};

            $.each($('#frmSubmitPremUserRegFirst').serializeArray(), function (i, field) {
                json[field.name] = field.value || '';
            });           

            hidJson.Form5 = json;

            var str = JSON.stringify(hidJson);

            $('#hdPrimUserFirstReg').val(str); // hidden field from same form 

        }
    },

Error: cannot deserialize the current json object (e.g. {“name”:“value”}) into type 'system.collections.generic.list`1

How can I do this ?

Please help me...

the string contain long value. So... I want to get only 'Projectname' from the json string. — AbhiJA
– AbhiJA, Commented Mar 22, 2017 at 7:15

Ahmed · Accepted Answer · 2017-03-22 07:25:53Z

1

var hdPrimUserFirstRegList = 
          JsonConvert
             .DeserializeObject<List<hdPrimUserFirstRegModel>>(pageVM.hdPrimUserFirstReg );
var projectsNames = hdPrimUserFirstRegList.Select(x=>x.ProjectName).toList();

And create model hdPrimUserFirstRegModelcontains all json object properties.

answered Mar 22, 2017 at 7:25

Ahmed

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3 Comments

AbhiJA Over a year ago

no build error, but occurred run time error: 'Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.List`1'

Ahmed Over a year ago

@AbhiJA because this is not a valid json, you can test it online first jsonlint.com

AbhiJA Over a year ago

sir, could you please check my jscript code. I have updated my question. There is hiddenfield 'hdPrimUserFirstReg' that holding data by form 1,Form 2 etc. So I can not rearrange json inside same hiddenfield.

Vecchiasignora · Accepted Answer · 2017-03-22 07:50:48Z

1

Try this

var listProjectName = JsonConvert .DeserializeObject<List<hdPrimUserFirstRegModel>>(pageVM.hdP‌rimUserFirstReg ).Select(x => x.ProjectName).ToList()

edited Mar 22, 2017 at 7:50

answered Mar 22, 2017 at 7:12

Vecchiasignora

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5 Comments

AbhiJA Over a year ago

The 'hdPrimUserFirstReg ' inside 'Form5'. How can I get ?

Vecchiasignora Over a year ago

pageVM.hdPrimUserFirstReg

AbhiJA Over a year ago

okay, but I want creat only list of projectname, but the pageVM.hdPrimUserFirstReg contain lot of items.

Vecchiasignora Over a year ago

ok, var listProjectName = JsonConvert .DeserializeObject<List<hdPrimUserFirstRegModel>>(pageVM.hdPrimUserFirstReg ).Select(x => x.ProjectName).ToList() ;

AbhiJA Over a year ago

no build error, but occurred run time error: 'Cannot deserialize the current JSON object (e.g. {"name":"value"}) into type 'System.Collections.Generic.List`1'

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