Pass List<int> from Javascript to AJAX-Enabled WCF in ASP.Net page

Question

I am calling a WCF method from an ASP.Net page, but I am getting format exception when WCF tries to deserialize the recordIds parameter received from JavaScript.

The first parameter passed to the WCF method needs to be of List type. Is there something wrong I have done in using JSON.stringify?

Javascript Code to call WCF

       function Update() {
        var myarray1 = new Array();
        myarray1[0] = 1;
        myarray1[1] = 11;
        myarray1[2] = 14;
        WCFService1.AJAXEnabledService.BatchUpdateRecords(
          JSON.stringify({recordIDs: myarray1}) , "ddsd", "gggg", 
          updateGrid, OnError);
    }

WCF method being called by above JavaScript

   [OperationContract]
    public bool BatchUpdateRecords(List<int> recordIds, string columnNameToUpdate, string columnValue)
    {

        DataTable tierIDsTable = new DataTable("RecordIds");
        tierIDsTable.Columns.Add(new DataColumn("Integer", typeof(Int32)));
        tierIDsTable.PrimaryKey = new DataColumn[] { tierIDsTable.Columns["TierId"] };

        foreach (int recordId in recordIds)
        {
            tierIDsTable.Rows.Add(recordId);
        }
        return true;
    }

p.s.w.g · Accepted Answer · 2013-03-15 03:17:56Z

1

Not 100% sure, but have you tried this?

WCFService1.AJAXEnabledService.BatchUpdateRecords(
    myarray1,
    "ddsd",
    "gggg",
    updateGrid, OnError);

answered Mar 15, 2013 at 3:17

p.s.w.g

150k31 gold badges307 silver badges339 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Sunil Over a year ago

WOW. You are 100% correct. Thanks for your quick and to the point answer. Just pass an array if the WCF needs a List<T> parameter. It can't be simpler than that.

p.s.w.g Over a year ago

@Sunil It's been a long time since I used ajax-enabled web services, so I wasn't sure if I was forgetting some detail. Glad to help.

David L · Accepted Answer · 2013-03-15 03:20:13Z

1

The issue (without knowing the error that you are receiving) is most likely that you are trying to pass in multiple parameters types. WCF does not usually support and expects an object instead. Create a response class with your parameters and use that instead.

public class ResponseObject 
{
    public List<int> recordIds { get; set; } 
    public string columnNameToUpdate { get; set; }
    public string columnValue { get; set; }
}

Use this object as your parameter

public bool BatchUpdateRecords(ResponseObject responseObject) 
{...

answered Mar 15, 2013 at 3:20

David L

34.1k8 gold badges70 silver badges98 bronze badges

Collectives™ on Stack Overflow

Pass List<int> from Javascript to AJAX-Enabled WCF in ASP.Net page

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related