Questions on Kendo UI for jQuery Forum

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"Input string is not well formed JSON" exception when deleting row

Hello,

I try to combine Kendo UI with Struts 2 action. Until now the results to retrieve data from the DB are satisfactory.
The table is loaded correctly with the data retrieved from the Action. The problem starts when i try to delete
an entry.

Source code:

<script>

$(document).ready(function () {

var crudServiceBaseUrl = "http://demos.kendoui.com/service",

dataSource = new kendo.data.DataSource({

transport: {

read: {

url: "http://localhost:8080/ProjectRoot/myProject,

dataType: "json"

},

destroy: {

url: "http://localhost:8080/ProjectRoot/myProject!deleteRow",

dataType: "jsonp",

contentType: "application/json; charset=utf-8"

},

parameterMap: function(options, operation) {

if (operation !== "read" && options.models) {

return {models: kendo.stringify(options.models)};

}

},

batch: true,

pageSize: 30,

schema: {

data: "myList",

model: {

id: "uuid",

fields: {

uuid: { editable: false, nullable: true },

lang: { type: "string" },

text: { type: "string" }

}

});

$("#grid").kendoGrid({

dataSource: dataSource,

pageable: true,

height: 400,

toolbar: ["create"],

columns: [

{ field:"lang", title: "Language" },

{ field: "text", title:"Text", width: "150px" },

{ command: ["edit", "destroy"], title: " ", width: "210px" }],

editable: "popup"

});

</script>

Inside my Struts 2 action i have getters and setters for the following variables:
-String text;
-String lang;
-String models;

Now i noticed the following behaviour:

First Scenario

When calling the deleteRow function in my struts action, the following parameters are send of the current row that i want to delete:

callback	`jQuery17201980517354870166_1353667373995`
models	`[{"lang":"de","text":"ProjectRoot-System","uuid":"c0437761-1c29-11e2-892e-0800200c9a66"},{"lang":"de","text":"Stephan","uuid":"46baf7b1-2345-11e2-81c1-0800200c9a66"}]`

This is a copy of the url parameters: _=1353667421178
callback=jQuery17201980517354870166_1353667373995
models=[{"lang":"de","text":"ProjectRoot-System","uuid":"c0437761-1c29-11e2-892e-0800200c9a66"},{"lang":"de","text":"Stephan","uuid":"46baf7b1-2345-11e2-81c1-0800200c9a66"}]

Unfortunately as a response from the server i get the following error :
org.apache.struts2.json.JSONException: Input string is not well formed JSON (invalid char ?)

    org.apache.struts2.json.JSONReader.buildInvalidInputException(JSONReader.java:155)

I did a debugging on the JSONInterceptor and found out that the json variable when trying to do the deserialize 
Object obj = JSONUtil.deserialize(request.getReader());
the json variable is an empty string.  Thus the above error.  


Second Scenario

Instead of calling a function to delete, i changed that to call an action. When doing this, the action
is called and my String models variable is set with the following values [{"lang":"de","text":"ProjectRoot-System","uuid":"c0437761-1c29-11e2-892e-0800200c9a66"}].

This seems sort of correct. Unfortunately with this case, the whole process does not go through the 
JSONInterceptor, so no deserialization is happening. 



So what is my goal:
To be able when pressing on delete to call the delete function and set the object with the values that are 
sent from kendo in order to continue with my own business logic process.  What could be wrong 
in my first scenario ? 

Please let me know if you need further information.

Regards

Stephan

Grid

asked on 23 Nov 2012

1 answer

233 views

Tutorial using change event args

I used Telerik Components for ASP.NET MVC and recently upgraded to Kendo UI. I must admit it has been a very rough transition due to incomplete documentation and demos that are not nearly as good as those for Telerik Components for ASP.NET MVC. For example, the Grid events documentation does not show how to do anything with the "e" arg passed into the handler.

I am struggling to use the event args or even the "this" passed into my change event handler. I cannot even tell which cell was clicked or whether the actual clicked element was an anchor tag that should show a popup. When I run the code "e.cellIndex()" returns -1. What good is that?

Can someone point me to a tutorial that helped them use the change event? Thanks.

Grid

answered on 23 Nov 2012

5 answers

115 views

Windows Phone rendering is shocking

Hi,

I understand that this framework targets Android, iOS and Blackberry but I was hoping that my application will somewhat still work on a Windows Phone. Running it this morning on a Windows Phone 7.5 was shocking.

Is this the norm, should I expect the application not to work at all on a Windows Phone browser or is there something I am doing wrong?

Is there a way for me to target a different layout for Windows Phone or is this framework just not able to work on this platform?

I guess if this is the case I would rather abandon the framework and just code a general interface that will work on all devices.

Thanks,
Anton

General Discussions

answered on 23 Nov 2012

0 answers

77 views

Clicking on the Chart

I have a question..
with kendo i can do this:
for example in a pie chart when i click on one part of this, then show me another chart.?

General Discussions

asked on 22 Nov 2012

1 answer

106 views

metro style with issues

Hi! - Please check your demo NumberTextBox/ Basic Usage with Metro style by clicking the spinner. Colors at the border and background are not visible.

NumericTextBox

answered on 22 Nov 2012

2 answers

381 views

Model Binder fails to bind data from Grid (MVC4, KendoUI for Web)

I have an issue where I have defined and created my KendoUI Web Grid widget in javascript and am attempting to perform batch editing. I have followed all of the examples I can find, but when the "update" action executes on the controller, it fails to bind the data.

I have the following:
A Contact Model:

public class ContactModel

{

public int Id { get; set; }

public string FirstName { get; set; }

public string LastName { get; set; }

public string GenderCode { get; set; }

public DateTime BirthDate { get; set; }

public AddressModel Address { get; set; }

public string Email { get; set; }

public string Phone { get; set; }

public decimal DesiredSalary { get; set; }

}

A Controller Action defined to Update:

[AcceptVerbs(HttpVerbs.Post)]

public ActionResult _UpdateGridData([DataSourceRequest] DataSourceRequest request, [Bind(Prefix="models")]IEnumerable<Models.ContactModel> models)

{

if (models != null && ModelState.IsValid)

{

foreach (var contact in models)

{

var target = model.Values.Where(x => x.Id == contact.Id).FirstOrDefault();

if (target != null)

{

target.LastName = contact.LastName;

target.FirstName = contact.FirstName;

target.BirthDate = contact.BirthDate;

target.GenderCode = contact.GenderCode;

}

return Json(ModelState.ToDataSourceResult());

}

And my Grid is configured in JavaScript:

// Create a Datasource.

var gridDataSource = new kendo.data.DataSource({

dataType: "json",

data: "Data",

transport: {

read: {

url: '@Url.Action("_GetGridData", "KendoGrid")',

dataType: "json"

},

update: {

url: '@Url.Action("_UpdateGridData", "KendoGrid")',

dataType: "json",

type: "POST"

}

},

pageSize: 10,

batch: true,

schema: {

model: {

id: "Id",

fields: {

Id: { type: "number", editable: false, nullable: true },

FirstName: { type: "string", validation: { required: true } },

LastName: { type: "string", validation: { required: true } },

GenderCode: { type: "string", nullable: true },

BirthDate: { type: "date" }

}

});

// Create a Grid using the above data source.

$("#inlinekendogrid").kendoGrid({

columns: [

{ field: "Id", title: "ID", width: 8, filterable: false, editable: false },

{ field: "FirstName", title: "First Name", width: 25 },

{ field: "LastName", title: "Last Name", width: 25 },

{ field: "GenderCode", title: "Gender", width: 25 },

{ field: "BirthDate", title: "Born", width: 25, format: "{0:MM/dd/yyyy}" }

],

editable: {

create: true,

update: true,

destroy: true,

confirmation: "Are you sure you wish to remove this entry?"

},

dataSource: gridDataSource,

sortable: {

mode: "multiple"

},

pageable: {

refresh: true,

pageSizes: true

},

selectable: true,

navigatable: true,

filterable: true

});

Everything seems to work fine except for it doesn't get bound to my ContactModel. The data coming up from the form is as follows:

Form Dataview URL encoded

models[0][Id]:2

models[0][FirstName]:Sally

models[0][LastName]:Shoreman22

models[0][GenderCode]:F

models[0][BirthDate]:Mon Sep 20 2010 00:00:00 GMT-0700 (Pacific Daylight Time)

models[0][Address][AddressLine1]:2 Way Street

models[0][Address][AddressLine2]:

models[0][Address][AddressLine3]:

models[0][Address][City]:Salem

models[0][Address][State]:OR

models[0][Address][ZipCode]:97312

models[0][Email]:salshor@saif.com

models[0][Phone]:

models[0][DesiredSalary]:0

I have not found any examples of people using Web Grid Widget in javascript with an MVC Controller. Is the mixing of the two what is causing my troubles? Do I need to configure the DataSource differently? Any help would be appreciated.

Grid

answered on 22 Nov 2012

0 answers

95 views

Hide Index button on tabstrip ?

Hi,

How do I hide the "Index" button that tabstrip shows at the buttom.

Very often the tab stop working after I click the Index button, the tab is not selected the blue line under icon just flashes once.

I'm using KendoUI with Cordova / Android.

TabStrip (Mobile)

asked on 22 Nov 2012

2 answers

179 views

Receiving metadata in the "save handler"

See doc here:
http://docs.kendoui.com/getting-started/web/upload/metadata#receiving-metadata-from-the-save-handler

What does the example code listed in this section of the doc have to do with receiving the metadata??? ...seems like you pasted the wrong example. How about showing us how to receive the metadata. I'm guessing it will be in the querystring?

Thanks.

Upload

answered on 22 Nov 2012

3 answers

656 views

Async Upload with additional fields

I'm trying to upload a file to a document in CouchDB.
To do so, I need to provide the document identifier as part of the url AND a revision as an additional field. This is not a problem if I'm submitting a form with both inputs (revision and file) but I wonder if it is possible with asynchronous upload do something similar. Is it? How?

Upload

answered on 22 Nov 2012

3 answers

132 views

Since newest build I can no longer navigate to views using parameters

Since copying in the JS for the newest update (2012.3.1114) clicking on my a tag that links to a page using the syntax <a href=#judgeFight?fightId=1> gives me the error "GET http://localhost:6110/app/judgeFight?fightId=1 404 (Not Found)."
Once I drop in the JS for version 2012.2.710 my code works and navigates to the page correctly. What is going on here?

General Discussions

answered on 22 Nov 2012