public static string GetConnectionString()
        {
            string entityConnectionString = ConfigurationManager.ConnectionStrings["ERPEntities"].ConnectionString;
            string providerConnectionString = new EntityConnectionStringBuilder(entityConnectionString).ProviderConnectionString;
            return providerConnectionString;
        }

public static List DataTableToList(this DataTable table) where T : class, new()

        {
           try
            {
                List list = new List();
                foreach (var row in table.AsEnumerable())
               {
                    T obj = new T();
                    foreach (var prop in obj.GetType().GetProperties())
                    {
                        try
                        {
                            PropertyInfo propertyInfo = obj.GetType().GetProperty(prop.Name);

                            propertyInfo.SetValue(obj, Convert.ChangeType(row[prop.Name], propertyInfo.PropertyType), null);

                        }
                        catch
                        {
                            continue;
                        }
                    }
                    list.Add(obj);
                }
                return list;
            }
            catch
            {
                return null;
            }
        }

    <link href="~/js/chosen.css" rel="stylesheet" type="text/css" runat="server" />
    <script src="<%#ResolveUrl("~") %>js/chosen.jquery.js" type="text/javascript"></script>



<asp:DropDownList ID="ddlAssignGroup" class="form-control"
     CssClass="chosen-select" Width="157px" runat="server">
</asp:DropDownList>


  <script type="text/javascript">

        var config = {
            '.chosen-select': {},
        }
        for (var selector in config) {
            $(selector).chosen(config[selector]);
        }
      </script>


Out put

at this point. everything is ok. but when this page is postback then this option is gone.
then i have find a solution by using this javascript code.

    <script type="text/javascript">
        var prm = Sys.WebForms.PageRequestManager.getInstance();
        prm.add_endRequest(function (s, e) {
            var config = {
                '.chosen-select': {},
            }
            for (var selector in config) {
                $(selector).chosen(config[selector]);
            }
        });
    </script>


this code actually fire when a post back occurs.

Jquery and css link
https://docs.google.com/file/d/0B2qzKDIYFsGgWFZHMFRDNU50SDg/edit

Datagrid  Date column format : 
<sdk:DataGridTextColumn Header="From" IsReadOnly="True"
                                                Binding="{Binding FromDate, StringFormat='{}{0:MM/dd/yyyy}'}" Width="auto"/>


<sdk:DataGridTextColumn Header="Discharge Date"
                                                Binding="{Binding DischargeDate, StringFormat='{}{0:MM/dd/yyyy a\\t h:mm tt}'}"/>
                        

System.Net.WebException: The remote server returned an error: NotFound

 

 

 

 

1. Namespace for data grid           xmlns:sdk="http://schemas.microsoft.com/winfx/2006/xaml/presentation/sdk"


2.     <sdk:DataGrid Name="dataGrid"  AutoGenerateColumns="False" Width="650"
                                  ScrollViewer.VerticalScrollBarVisibility="Auto" Height="150" >
                        <sdk:DataGrid.Columns>

                            <sdk:DataGridTemplateColumn Header="Pay Mode" Width="100">
                                <sdk:DataGridTemplateColumn.CellTemplate>
                                    <DataTemplate>
                                        <ComboBox  Name="cmbPayMode"
                                                  HorizontalAlignment="Left"
                                                  VerticalAlignment="Top" ItemsSource="{StaticResource oBillTypeList}"
                                                  DisplayMemberPath="CatName" SelectedValuePath="CatName"
                                                   SelectedItem="{Binding PayMode, Mode=TwoWay}"
                                                   SelectionChanged="cmbPayMode_SelectionChanged"
                                                  Width="80">
                                        </ComboBox>
                                    </DataTemplate>
                                </sdk:DataGridTemplateColumn.CellTemplate>
                            </sdk:DataGridTemplateColumn>

                           
                        </sdk:DataGrid.Columns>
                    </sdk:DataGrid>


3.   set data grid datasource by your desire datasource



  dataGrid.ItemsSource = oList;

4.  now for combobox data source in your class constructor , before initialize code add this code
            this.Resources.Add("oBillTypeList", oBillTypeList);
oBillTypeList  is a   ObservableCollection. other wise it cannnot load data from wcf ria service result set.

5.  to get data from your combobox or any control you can parse data from this code. or you can set bindmode two way.

foreach (AdvanceCollection p in oList)
                {
                    ComboBox cmbPayMod = dataGrid.Columns[0].GetCellContent(p) as ComboBox;
                    TextBox txtMode = dataGrid.Columns[2].GetCellContent(p) as TextBox;
                   
                }

step 1 :  add a class in your web service project with following details

[DataContract]
    public class FilesUploader
    {

        [DataMember]
        public string FileName { get; set; }

        [DataMember]
        public string FoldersName { get; set; }

        [DataMember]
        public byte[] Imagestream { get; set; }


    public string Upload(FilesUploader image)
        {
            FileStream fileStream = null;
            BinaryWriter writer = null;
            try
            {
                //filePath = HttpContext.Current.Server.MapPath(".") + ConfigurationManager.AppSettings["PictureUploadDirectory"] + image.ImageName;
                string location = ConfigurationManager.AppSettings["imageFileLocation"].ToString();
                string strFilePath = location + image.FoldersName + "\\" + image.FileName;
            
                if (image.FileName != string.Empty)
                {
                    fileStream = File.Open(strFilePath, FileMode.Create);
                    writer = new BinaryWriter(fileStream);
                    writer.Write(image.Imagestream);
                }
                return OperatioinResult.Success;
            }
            catch (Exception ex)
            {
                return OperatioinResult.ERROR + " ~ " + ex.Message;
            }
            finally
            {
                if (fileStream != null)
                    fileStream.Close();
                if (writer != null)
                    writer.Close();
            }
        }


}


step 2 : add this method in your service operation contracnt 

 [OperationContract]
        public string FilesUploader_UploadFiles(FilesUploader fileByte)
        {
            //MemoryStream byFile = new MemoryStream(System.Text.Encoding.ASCII.GetBytes(fileByte));
            return new FilesUploader().Upload(fileByte);
        }


Step 3 : use this service reference in your silverlight clinet project.

           OpenFileDialog op = new OpenFileDialog();
           op.Filter = "Images (*.jpg, *.png, *.bmp)|*.jpg;*.png;*.bmp";
            op.ShowDialog();
            if (op.File != null && op.File.Name != "")
            {
                    fileStram = (FileStream)op.File.OpenRead();
                    byte[] bytes = new byte[fileStram.Length];
                    fileStram.Read(bytes, 0, (int)fileStram.Length);

                    FilesUploader fUploader = new FilesUploader();
                    tempImage = "tempPatientImages" + op.File.Extension;
                    fUploader.FileName = tempImage;
                    fUploader.Imagestream = bytes;
                    fUploader.FoldersName = "PatientImges";

                    service.FilesUploader_UploadFilesAsync(fUploader);
                    // service is the object of service provider you need it chage it to your object name.
}