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POBinding not working for collections in knockoutjs
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9673052
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0
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4
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8
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CreationDate
2012-03-12T18:53:00.287
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2015-02-08T20:59:24.497
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2017-05-23T11:58:30.997
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<p>I am trying to use knockout.js to show a specification object on the UI. The specification has a name and it has a few parameterInfo rows. Each ParameterInfo row has a ParameterPartNumber and a bunch of SignalInputs. Each SignalInput has just one property called Name. I am able to show the specification name, the parameterInfo rows and ParameterPartNumber but am not able to show the bunch of SignalInput Names that I have even though the SpecificationModel has the values. I am using the following code:</p> <p><strong>HTML code:</strong></p> <pre><code><div id="specificationHeader"> Name : <input data-bind='value: Name' /> <br /> <br /> </div> <table> <thead> <tr> <th> Parameter Part </th> <th> Signal Inputs </th> </tr> </thead> <tbody data-bind="foreach: ParameterInfos"> <tr> <td> <input data-bind='value: ParameterPartNumber' /> </td> <td> <ul data-bind="foreach: SignalInputs"> <li><span data-bind='text: Name' /></li> </ul> </td> </tr> </tbody> </table> </code></pre> <p><strong>Javascript/Knockout code:</strong></p> <pre><code><script type="text/javascript"> var SpecificationModel = function (specification) { var self = this; self.Name = ko.observable(specification.Name); self.ParameterInfos = ko.observableArray(ko.utils.arrayMap(specification.ParameterInfos, function (ParameterInfo) { return { ParameterPartNumber: ParameterInfo.ParameterPartNumber, SignalInputs: ko.observableArray(ParameterInfo.SignalInputs) }; })); }; var specificationData = '@Html.Raw(ViewBag.SpecificationData)'; var viewModel = new SpecificationModel($.parseJSON(specificationData)) ko.applyBindings(viewModel); </script> </code></pre> <p>When I run the program in debug mode, I can see the following values:</p> <pre><code>var specificationData = '{"Name":"Specification One", "ParameterInfos": [{"ParameterPartNumber":"26-20700-002", "SignalInputs":[{"Name":"Park Brake"},{"Name":"Neutral"}]} ]}'; </code></pre> <p>It's strange because I was able to get an almost similar example working thanks to the answers for the following question:</p> <p><a href="https://stackoverflow.com/questions/9657002/need-to-pass-initial-viewmodel-data-from-asp-net-mvc-to-knockout-js/9658321#9658321">Need to pass initial viewmodel data from ASP.NET MVC to knockout.js</a></p> <p>Still, somehow the binding code is not working. What am I missing?</p> <p><strong>EDIT:</strong></p> <p>Ok, the following lines work:</p> <pre><code><td data-bind="foreach: SignalInputs"> <ul > <li><span data-bind='text: Name' /></li> </ul> </td> </code></pre> <p>But, the following lines don't</p> <pre><code><td> <ul data-bind="foreach: SignalInputs"> <li><span data-bind='text: Name' /></li> </ul> </td> </code></pre> <p>Any idea why? The latter site of lines work in the other stackoverflow example question I cited.</p>
Tags
<data-binding><knockout.js>
Title
Binding not working for collections in knockoutjs
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
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1. USCommunity
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1. USYasir
plurals
PostLinksPostIdRelatedPostId
1. PL
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  LTLinked
2. PL
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PostLinksRelatedPostIdPostId
1. PL
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1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
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  PTAnswer
2. PO
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  PostTypePostTypeId
  PTAnswer
3. PO
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1. This table or related slice is empty.
CommentsPostId

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