CODEWITHSUNDEEP
c#jquery.net
DennisL
DennisL

Reputation: 333

.Net pass a list of objects to JQuery as parameter

Hi I tried to pass a list of self-defined objects to JQuery as parameter and expect jQuery recognise it as the specific object and loop through it. The class is:

public class PriceSummary{
        public string ItemName { get; set; }
        public string ItemPrice { get; set; } }

The backend method is:

public void updatePriceSummary(List<PriceSummary> PriceSummaryList){
        ScriptManager.RegisterStartupScript(Page, GetType(), "changePriceList",
           "updatePriceList('" + PriceSummaryList + "');", true);}

JQuery Method

function updatePriceList(PriceSummaryList) {
    PriceSummaryList.each(function () 
      {$('#ControlSummaryTitle').append('<tr id = "xxx"> <td class="SummaryItem">' +
      this['ItemName'] + '</td> <td class="SummaryPrice">' + this['ItemPrice'] + 
      '</td></tr>');   })
;}

However, the JQuery function couldn't recognise the parameter as a list and couldn't loop through it. The error message is:

0x800a01b6 - JavaScript runtime error: Object doesn't support property or method 'each'

Could anybody advise how to fix it?

Upvotes: 1

Views: 997

Answers (2)

asolvent
asolvent

Reputation: 881

Just serialize your list to JSON before you send it across (almost identical issue) Converting list of objects to json array

Upvotes: 2

Alex Paven
Alex Paven

Reputation: 5549

Problem 1: if you're just composing a List<> into a string it will get turned into a string by the simplest method .Net knows, which is .ToString(), resulting in "System.Collections.Generic.List`1[someclass]". You need to transform it into something that Javascript understands, let's say by serializing it into JSON. You can easily inspect the value in the browser to see if you're getting closer to something that works.

Problem 2: you're surrounding the value with single quotes (updatePriceList('...')) so it would still be interpreted as a string; remove the single quotes.

Upvotes: 2

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