How to return multiple parameters using web method (web service) in C#?

How can I return multiple parameters of string type using web method (web service) in C#, here is my current code

public static string GetDetail(string oid, Label label)

string s = "select amount,amount_type from money where id='" +oid + "'";

connect con = new connect();
DataSet ds = con.get(s);
if (ds.Tables.Count > 0)
if (ds.Tables[0].Rows.Count > 0)
label.Text = ds.Tables[0].Rows[0]["a_type"].ToString();

string a=Math.Round(Convert.ToDecimal(ds.Tables[0].Rows[0][0]), 2).ToString();

return a + " " + label;
return "no";
return "no";



Asked by:- RameshwarLate
: 6015 At:- 11/15/2017 9:43:34 AM
c# web-method web-services asmx

2 Answers
profileImage Answered by:- manish

The recommended method is to create custom data type class and return data as the class type instead of string.

Like this suppose you have this class

public sealed class MyDataType
    public string Data{ get; set; }
    public string Data1 { get; set; }

then your web method in web service should be like

[WebMethod(EnableSession = true)]
public MyDataType TestMethod(string testId)
  //Some Code

    string data = string.Empty;
    string data1 = string.Empty;
    List<test1> datalist1 = new List<test1>();
    List<test> datalist = new List<test>();

    data = jsonSerialize.Serialize(datalist1);
    data1 = jsonSerialize.Serialize(datalist);
    return new MyData { Data = data, Data1 = data1 };

Another method, not a good way but you could return an array of strings:

public string[] WebServiceMethod(...)
    return new string[] { data, data1 };

You'd then need to perform each bit of JSON deserialization separately on the client, which isn't a pleasant task

Or third solution is to check this link

At:- 11/15/2017 11:38:15 AM Updated at:- 11/15/2017 11:43:31 AM
good and easy answer for sending multiple data from web method 0
By : vikas_jk - at :- 3/25/2018 10:18:18 AM
Returning Multiple values using Class is better solution I think. 0
By : neena - at :- 6/28/2021 11:18:45 AM

profileImage Answered by:- vikas_jk

You can simply return multiple values in web-api in C# as below

 public IHttpActionResult getAll()
   //some code here
    return Ok(new { data1List, data2List, someValue });

That should work.

At:- 10/17/2022 7:46:21 AM

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