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Issue with Data Manager not calling WebAPI

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140831 Nov 9,2018 12:10 AM UTC Nov 9,2018 06:08 AM UTC Angular - EJ 2 1
Tags: Grid
Asked On November 9, 2018 12:10 AM UTC

Here is my code on home.component.ts -
import { Component, OnInit, ViewChild } from '@angular/core';
import { DataManager, Query, UrlAdaptor, WebApiAdaptor, ODataAdaptor } from '@syncfusion/ej2-data';
import { GridComponent, EditService, ToolbarService, PageService, ColumnChooserService, EditSettingsModel, ToolbarItems } from '@syncfusion/ej2-ng-grids';

  selector: 'app-home',
  templateUrl: './home.component.html',
  providers: [ToolbarService, EditService, PageService, ColumnChooserService]
export class HomeComponent implements OnInit {

  public title: string = "Manage Client Payment Options";
  public data: Object[];
  public dataManager: DataManager;
  public grid: GridComponent;
  public editSettings: EditSettingsModel;
  public toolbar: ToolbarItems[];
  public pageSettings: Object;
  ngOnInit(): void {
    console.log("This is testing");
    this.dataManager = new DataManager({
      //url: '/api/Payment',
      url: '/api/Payment',
      adaptor: new WebApiAdaptor
    this.editSettings = { allowEditing: true, allowAdding: false, allowDeleting: false, mode: 'Normal' };
    this.toolbar = ['Edit', 'Update', 'Cancel', 'ColumnChooser'];
    //this.pageSettings = { pageCount: 5 };


Here is my Web API Code -
        public ActionResult Get()
            List<ClientInfo> clientPaymentInfos = new List<ClientInfo>();
            Int32 intCnt = 0 ;
            DataTable dtPaymentInfo = new DataTable();
            using (SqlConnection conn = new SqlConnection(_connString))
                using (SqlCommand cmd = new SqlCommand())
                    cmd.Connection = conn;
                    cmd.CommandType = CommandType.StoredProcedure;
                    cmd.CommandText = "pr_GetAllClientInfo";
                    SqlDataReader dr = cmd.ExecuteReader();
                    intCnt = dtPaymentInfo.Rows.Count;
                    foreach(DataRow dRow in dtPaymentInfo.Rows)
                        ClientInfo clientInfo = new ClientInfo();
                        clientInfo.clientNumber = dRow["ClientNumber"].ToString();
                        clientInfo.clientName = dRow["ClientName"].ToString();
                        clientInfo.relatedClientNumber = dRow["RelatedClientNumber"].ToString();
                        clientInfo.allowACHProcessing = (Boolean)dRow["AllowACHProcessing"];
                        clientInfo.allowCCProcessing = (Boolean)dRow["AllowCCProcessing"];
            var result = new { count = intCnt, result = clientPaymentInfos };
            return Ok(result);

But whenever I try to run and check the browser it does not call the Web API at all. If I try it separately it does work but cannot call from the data manager. But I get the following error -
core.js:1448 ERROR TypeError: Cannot read property 'length' of undefined
    at WebApiAdaptor.UrlAdaptor.getRequestQuery (adaptors.js:474)
    at WebApiAdaptor.UrlAdaptor.processQuery (adaptors.js:435)
    at DataManager.executeLocal (manager.js:116)
    at eval (manager.js:164)
    at ZoneDelegate.invokeTask (zone.js:421)
    at Object.onInvokeTask (core.js:4736)
    at ZoneDelegate.invokeTask (zone.js:420)
    at Zone.runTask (zone.js:188)
    at ZoneTask.invokeTask (zone.js:496)
    at ZoneTask.invoke (zone.js:485)
defaultErrorLogger @ core.js:1448

Any help is greatly appreciated. My old projects still work. Not sure what the new version of .NET core is having issues.

Venkatesh Ayothi Raman [Syncfusion]
Replied On November 9, 2018 06:08 AM UTC

Hi Ameet, 
Thanks for using Syncfusion products. 
We have tried to reproduce the issue at our end with latest Essential JavaScript 2 version but it is unsuccessful. We have prepared a simple sample based on your code example. Please refer to the below sample link. 

Could you please share the below details that will be helpful for us to provide a better solution as early as possible. 
  1. Share your Essential JavaScript 2 Version and ASP.NET CORE version.
  2. Share your Grid html code.
  3. Please check issue with latest Essential JavaScript 2 Version
  4. Could you please check whether the issue is due to serialization problem in your CORE application . If yes you can overcome this serialization problem[camel case] by adding the JsonOutputFormatter options under the Startup.cs file. JsonOutputFormatter is a TextOutputFormatter for JSON content. Please refer the sample below,
public void ConfigureServices(IServiceCollection services) 
            // Add framework services. 
            services.AddMvc().AddJsonOptions(options => 
                options.SerializerSettings.ContractResolver = new Newtonsoft.Json.Serialization.DefaultContractResolver(); 
  1. Please reproduce the issue in the above sample if possible.

Venkatesh Ayothiraman. 


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