ASP.NET

<asp:DropDownList ID="DropDownLanguage" runat="server" AutoPostBack="true">
    <asp:ListItem Value="en-US">English (US)</asp:ListItem>
    <asp:ListItem Value="es">Español</asp:ListItem>
</asp:DropDownList>

Protected Overrides Sub InitializeCulture()
    Dim lang As String = Request("DropDownLanguage")

    If lang IsNot Nothing Or lang <> "" Then
        Thread.CurrentThread.CurrentUICulture = New CultureInfo(lang)
        Thread.CurrentThread.CurrentCulture = CultureInfo.CreateSpecificCulture(lang)
    End If

End Sub 'InitializeCulture

function OnRecordSelect(arrSelectedRecords) {
	         	          
for(var i=0; i<arrSelectedRecords.length;i++) {
  var record = arrSelectedRecords[i];

  document.getElementById("txtNum").value = record.Num
  document.getElementById("txtValue").value = record.Value;
  
 // not working
  setParam(record.odrCD,record.itemCD);
  }
}

function setParam(odrCD,itemCD){
  
  sqlDS.SelectParameters(0).DefaultValue = odrCD;   //got an error here sqlDS is not defind
  ddlItem.SelectedValue = itemCD; 
}

string strConnStr = "Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\sitedata.mdf;Integrated Security=True;User Instance=True";

Unable to open Database connection [Failed to generate a user instance of SQL Server due to failure in retrieving the user's local application data path. Please make sure the user has a local user profile on the computer. The connection will be closed.]