Retreiving Distinct data from a webservice

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Hi,

We need to bind a webservice result into a dropdownlist,but the problem is duplicate countryname is binding.

Actually the webservice SOAP O/P contains 80 values in which duplicates are there.We need to avoid teh duplication using LINQ query.

The query to bind the dropdownlist using webservice is below.

VB

myICTCReceCountry = myICTCWebService.GetReceivingCountry(myICTCRecCountrySOAPIn).Records

               For i As Integer = 0 To myICTCReceCountry.Length - 1
                   'ddlCountry.DataTextField = myICTCReceCountry(i).Country_Name
                   'ddlCountry.DataValueField = myICTCReceCountry(i).Destination_Country
                   ddlCountry.Items.Insert(i, New ListItem(myICTCReceCountry(i).Country_Name, myICTCReceCountry(i).Destination_Country))
               Next

Please help

Regards
Sreejith

Posted 6-May-15 19:45pm

Member 11658469

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Maciej Los 7-May-15 2:21am

What returns myICTCWebService.GetReceivingCountry(myICTCRecCountrySOAPIn).Records? Please, be more specific and provide more details.

2 solutions

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Ajay Kumar · Answer 1 · 2015-05-06T20:26:00

Solution 1

VB

Dim lst = From a In myICTCReceCountry_
          Order By a_
          Select New With {Key a.Country_Name, a.Destination_Country}Distinct.ToList

      For Each lr In lst  
              ddlCountry.DataTextField = lr.Country_Name;
                ddlCountry.DataValueField = lr.Destination_Country;
      Next

Posted 6-May-15 20:26pm

Ajay Kumar

Updated 7-May-15 1:31am

v2

Comments

Member 11658469 7-May-15 2:53am

Hi Thanks for the reply.

We are doing the code in vb.net.So when we convert the code and copy into our application like

Dim lstResult As string() = (From a In myICTCReceCountry With{Key.Country_Name = a.Country_Name,Key.Destination_Country = a.Destination_Country}).ToList.Distinct()
For Each lst As String In lstResult
ddlCountry.DataTextField = lst.Country_Name
ddlCountry.DataValueField = lst.Destination_Country
Next
We facing an error in the With & lstResult variable.Please help

Maciej Los · Answer 2 · 2015-05-06T20:32:00

Solution 2

As per my understanding, you want to get non-duplicated values. So, you need to use Group By Clause[^] or Distinct method[^] values ;)

For further information, please see:
How to: Count, Sum, or Average Data by Using LINQ (Visual Basic)[^]

Posted 6-May-15 20:32pm

Maciej Los