web post method not working in rest ful

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ASP.NET4

Hi
how are you.

I am facing a problem in post method. i am trying to update in server but service saying end point not found.

The thing is that web get method is working but post method is not working here is code :

namespace Healthcare
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
    [ServiceContract]
    public interface IService1
    {

      
        [OperationContract]
        [WebInvoke(Method = "GET",
            ResponseFormat = WebMessageFormat.Json,
            BodyStyle = WebMessageBodyStyle.Wrapped,
            UriTemplate = "EmpRecord"
            )]
        List<EmpRecord> GetEmployeeLIst();

        [OperationContract]
        [WebInvoke(Method = "GET",
            ResponseFormat = WebMessageFormat.Json,
            BodyStyle = WebMessageBodyStyle.Wrapped,
            UriTemplate = "EmpRecord/{id}")]
        
        EmpRecord GetemById(string id);



      [OperationContract(Name = "PostSampleMethod")]
        [WebInvoke(Method = "POST",
         UriTemplate = "PostSampleMethod")]
        
        string PostSampleMethod(string city);
       



    }

i am successfully calling service with get mehtod with this url : http://localhost:57325/Service1.svc/emprecord


but when calling PostSampleMethod it saying method not found with url :
http://localhost:57325/Service1.svc/PostSampleMethodPostSampleMethod

if i put parameter
http://localhost:57325/Service1.svc/PostSampleMethod/usa

then it say end point not found




the service code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
using System.Configuration;
using System.Data.SqlClient;
using System.Data;
using Emp.Interface;
namespace Healthcare
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together.
    public class Service1 : IService1
    {
        public string GetData(int value)
        {
            return string.Format("You entered: {0}", value);
        }

        public List<EmpRecord> GetEmployeeLIst()
        {
            string connStr = ConfigurationManager.ConnectionStrings["constr"].ToString();
            SqlConnection conn = new SqlConnection(connStr);
            SqlCommand comm = new SqlCommand();
            comm.CommandText = "select city,address from tblemployee";
            comm.Connection = conn;
            SqlDataAdapter da = new SqlDataAdapter(comm);
            DataSet ds = new DataSet();
            conn.Open();
            da.Fill(ds, "StudentRecord");
            conn.Close();
            List<EmpRecord> stuList = new List<EmpRecord>();
            
            if (ds.Tables != null)
            {
                int recordCount = ds.Tables["StudentRecord"].Rows.Count;
                if (recordCount > 0)
                {
                    DataTable dtab = ds.Tables["StudentRecord"];
                    for (int i = 0; i < recordCount; i++)
                    {
                        EmpRecord objemp = new EmpRecord();
                        objemp.city = dtab.Rows[i]["city"].ToString();
                        objemp.address = dtab.Rows[i]["address"].ToString();    
                        stuList.Add(objemp);
                    }
                }
            }
            comm.Dispose();
            return stuList;
           
        }



        public EmpRecord GetemById(string id)
        {
            try
            {
                int bookId = Convert.ToInt32(id);

                string connStr = ConfigurationManager.ConnectionStrings["constr"].ToString();
                SqlConnection conn = new SqlConnection(connStr);
                SqlCommand comm = new SqlCommand();
                comm.CommandText = "select Empkey,city,[Address]    from tblemployee where Empkey="+bookId;
                comm.Connection = conn;
                SqlDataAdapter da = new SqlDataAdapter(comm);
                DataSet ds = new DataSet();
                conn.Open();
                da.Fill(ds, "StudentRecord");
                conn.Close();
                
                EmpRecord objemp = new EmpRecord();
                if (ds.Tables != null)
                {
                    int recordCount = ds.Tables["StudentRecord"].Rows.Count;
                    if (recordCount > 0)
                    {
                        DataTable dtab = ds.Tables["StudentRecord"];
                       
                            objemp.city = dtab.Rows[0]["city"].ToString();
                            objemp.address = dtab.Rows[0]["address"].ToString();
                            
                        
                    }
                }
                comm.Dispose();
                return objemp;


            }
            catch
            {
                throw new FaultException("Something went wrong");
            }
        }


        public string PostSampleMethod(string city)
        {
            try
            {

                string m = "True";
                string connStr = ConfigurationManager.ConnectionStrings["constr"].ToString();
                SqlConnection conn = new SqlConnection(connStr);
                SqlCommand comm = new SqlCommand();
                comm.CommandText = "update tblemployee set  city='rupndagr' where city=" + city;
                comm.Connection = conn;
                SqlDataAdapter da = new SqlDataAdapter(comm);
                conn.Open();
                comm.ExecuteNonQuery();  
                conn.Close();
                return m;

              

                
            }
            catch
            {
                throw new FaultException("Something went wrong");
            }
        }

        public CompositeType GetDataUsingDataContract(CompositeType composite)
        {
            if (composite == null)
            {
                throw new ArgumentNullException("composite");
            }
            if (composite.BoolValue)
            {
                composite.StringValue += "Suffix";
            }
            return composite;
        }
    }
}

Please help here is web.config

<?xml version="1.0"?>
<configuration>
  <connectionStrings>
  <add name="constr" connectionString="Data Source=.;Initial Catalog=dbHealthcare;Integrated Security=false;Persist Security Info=True;User Id=sa;Password=nic123" providerName="System.Data.SqlClient"/>
  </connectionStrings>
  <system.web>
    <compilation debug="true" targetFramework="4.0" />
  </system.web>
  <system.serviceModel>
    <services>
      <service name="Healthcare.Service1" behaviorConfiguration="ServiceBehaviour">
        <!-- Service Endpoints -->
        <!-- Unless fully qualified, address is relative to base address supplied above -->
        <endpoint address =""  name="webHttpBinding" binding="webHttpBinding" contract="Healthcare.IService1" behaviorConfiguration="webHttp">
          <!-- 
              Upon deployment, the following identity element should be removed or replaced to reflect the 
              identity under which the deployed service runs.  If removed, WCF will infer an appropriate identity 
              automatically.
          -->
        </endpoint>

        <endpoint name="mexHttpBinding"
                  address="mex"
                  binding="mexHttpBinding"
                  contract="IMetadataExchange"
                  />
      </service>
    </services>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" minFreeMemoryPercentageToActivateService="1"></serviceHostingEnvironment>
    <behaviors>
      <serviceBehaviors>
        <behavior name="ServiceBehaviour">
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false"  />
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="webHttp">
          <webHttp/>
        </behavior>
      </endpointBehaviors>
    </behaviors>

  </system.serviceModel>
  <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
  </system.webServer>

</configuration>