When using a datamanager for a dropdownlist, Error dateParse object not extensible

[Aaron Knipe]

I am trying to use a DataManager to populate a drop down list on an edit template.  the DataManager is calling a controller action, but the action never fires.  I have tried several variations of return data on the controller including Json(new{Items=items,Count = Count}),  Json(new{items=items,count = Count}), Json(new{result=items,Count = Count}).  Something in the datamanager appears to have a type error as it is failing between my two debug points and not hitting the controller.  Am I missing something or doing something wrong?

[Ashokkumar Balasubramanian]

 

Hi Aaron Knipe, 

 

Good day to you. 

 

We were unable to reproduce the reported issue at our end and prepared the sample based on your provided code example. 

 

 

<input type="text" id='customers' /> 

 

<script> 

 

// initialize DropDownList component 

 

var dropDownListObj = new ej.dropdowns.DropDownList({ 

 

// bind the DataManager instance to dataSource property 

 

dataSource: new ej.data.DataManager({ 

 

url: '@Url.Action("UrlDatasource", "Home")', 

 

adaptor: new ej.data.UrlAdaptor(), 

 

crossDomain: true 

 

}), 

 

// map the appropriate columns to fields property 

 

fields: { value: 'ShipCountry' }, 

 

// set the placeholder to DropDownList input element 

 

placeholder: 'Select a name', 

 

}); 

 

dropDownListObj.appendTo('#customers'); 

 

</script> 

 

 

[HomeController.cs] 

 

public JsonResult UrlDatasource([FromBody]Data dm) 

 

        { 

 

            var val = OrdersDetails.GetAllRecords(); 

 

            var Data = val.ToList(); 

 

            var count = val.Count(); 

 

            if (dm.where != null) 

 

            { 

 

                Data = (from cust in Data 

 

                        where cust.ShipCountry.ToLower().StartsWith(dm.@where[0].value.ToString()) 

 

                        select cust).ToList(); 

 

            } 

 

            if (dm.take != 0) 

 

                Data = Data.Take(dm.take).ToList(); 

 

            return Json(new { result = Data }); 

 

        } 

 

Sample:  

 

https://www.syncfusion.com/downloads/support/forum/146334/ze/EJ2_Core_146334_URL-1001813154 

 

Still issue persists, please revert with issue reproducing sample that will help us to check and provide the exact solution at our end. 

 

Regards, 

Ashokkumar B. 

[Aaron Knipe]

Is this controller action signature required?

public JsonResult UrlDatasource([FromBody]Data dm) { ... }

[Aaron Knipe]

I did find the issue.  The issue is that I needed to declare a new data manager. 

[Narayanasamy Panneer Selvam]

Hi Aaron, 

Most welcome. 

We are glad to hear that your issue is resolved in your end. 

Regards, 

Narayanasamy P.