Silverlight webpart in SharePoint 2010

Foolowing are the steps for creating a silver light webpart for SharePoint 2010.

1) Create a new project with the template "Silverlight Application"

2) Un-check "Host the Silverlight application in a new web site.
3)  Add the following references from this path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\ClientBin".
Microsoft.SharePoint.Client.Silverlight.dll
Microsoft.SharePoint.Client.Silverlight.Runtime.dll
4) Add this reference as well System.Windows.Controls.Data.Input
5) After adding the reference, the solution pane should look like this:

6) Next step is to design the XAML:
< UserControl x:Class="SilverlightApplicationHelloWorld.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:datainput="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Data.Input"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400" >
    < Grid x:Name="LayoutRoot" Background="White">
        < Button Click="btnLoadSite_Click" Content="Load Site" Height="23" HorizontalAlignment="Left" Margin="25,12,0,0" Name="btnLoadSite" VerticalAlignment="Top" Width="75" >< /Button >
        < Canvas Name="canvasLabels" Visibility="Collapsed" >         
            < datainput:Label Content="Site: " Height="22" HorizontalAlignment="Left" Margin="41,55,0,0" Name="label1" VerticalAlignment="Top" Width="73" >< /datainput:Label >
            < datainput:Label Height="22" HorizontalAlignment="Left" Margin="120,55,0,0" Name="label2" VerticalAlignment="Top" Width="233" >< /datainput:Label >
            < datainput:Label Content="Url:" Height="24" HorizontalAlignment="Left" Margin="41,84,0,0" Name="label3" VerticalAlignment="Top" Width="73" >< /datainput:Label >
            < datainput:Label Height="24" HorizontalAlignment="Left" Margin="120,84,0,0" Name="label4" VerticalAlignment="Top" Width="233" >< /datainput:Label >
            < datainput:Label Content="Description" Height="26" HorizontalAlignment="Left" Margin="41,116,0,0" Name="label5" VerticalAlignment="Top" Width="73" >< /datainput:Label >
            < datainput:Label Height="26" HorizontalAlignment="Left" Margin="120,116,0,0" Name="label6" VerticalAlignment="Top" Width="233" >
             < /datainput:Label >
        < /Canvas >
    < /Grid >
< /UserControl >
7) Add the following in code behind:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.SharePoint.Client;
namespace SilverlightApplicationHelloWorld
{
    public partial class MainPage : UserControl
    {
        public MainPage()
        {
            InitializeComponent();
        }
        private ClientContext context = null;
        private Web web = null;
        private delegate void UpdateUIMethod();
        private void btnLoadSite_Click(object sender, RoutedEventArgs e)
        {
            context = ClientContext.Current;
            web = context.Web;
            context.Load(web, w => w.Title, w => w.Description, w => w.ServerRelativeUrl);
            context.ExecuteQueryAsync(OnSiteLoadSuccess, OnSiteLoadFailure);
        }
        private void OnSiteLoadSuccess(object sender, ClientRequestSucceededEventArgs e)
        {
            UpdateUIMethod updateUI = LoadSiteData;
            this.Dispatcher.BeginInvoke(updateUI);
        }
        private void OnSiteLoadFailure(object sender, ClientRequestFailedEventArgs e)
        {
            MessageBox.Show("Request Failed: " + e.Message + ", Stack Trace:" + e.StackTrace);
        }
        private void LoadSiteData()
        {
            canvasLabels.Visibility = System.Windows.Visibility.Visible;
            label2.Content = web.Title;
            label4.Content = web.ServerRelativeUrl;
            label6.Content = web.Description;
        }
    }
}

8) For deployment there are two steps:
8a) Directly deploy to "Client Bin" folder.
Change the "Output Path" to "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\14\TEMPLATE\LAYOUTS\ClientBin" in the Solution -> Property page.

 

Now, add a Silverlight webpart on a sharepoint page and set the URL as

"_layouts/ClientBin/SilverlightApplicationHelloWorld.xap". 

 

8b) Other approach is add the XAP to a document libratry, and give the path in Silverlight webpart

Accessing Lists.asmx

I Got a requirement to access a list data through web service. Therefore, I consumed 'Lists.asmx' built-in service provided by SharePoint.


1) Following codes are required to get list item through CAML query

            Lists listService = new Lists();
            listService.Credentials = System.Net.CredentialCache.DefaultCredentials;
            listService.Url = "http://spsserver" + "/_vti_bin/lists.asmx";
            XmlDocument xmlDoc = new System.Xml.XmlDocument();
            XmlNode ndQuery = xmlDoc.CreateNode(XmlNodeType.Element, "Query", "");
            XmlNode ndViewFields =
                    xmlDoc.CreateNode(XmlNodeType.Element, "ViewFields", "");
            XmlNode ndQueryOptions =
                    xmlDoc.CreateNode(XmlNodeType.Element, "QueryOptions", "");


            ndViewFields.InnerXml = "";
            ndQuery.InnerXml = "" +
                                "0";
            try
            {
                XmlNode ndListItems = listService.GetListItems("Tasks", null, ndQuery, ndViewFields,null, null, null);
                foreach (System.Xml.XmlNode listItem in ndListItems.ChildNodes[1].ChildNodes)
                {
                    if (listItem.OuterXml.Contains("ows_Title"))
                    {
                        txtValue.Text += Environment.NewLine + listItem.SelectSingleNode("@ows_Title").Value.Trim();
                        string strStartDate= listItem.SelectSingleNode("@ows_StartDate").Value.Trim();
                        DateTime dtConvert = DateTime.SpecifyKind(DateTime.Parse(strStartDate), DateTimeKind.Utc);
                        txtValue.Text += "  " + dtConvert.ToLocalTime().ToString();
                    }
                }
            }
            catch (System.Web.Services.Protocols.SoapException ex)
            {
                MessageBox.Show("Message:\n" + ex.Message + "\nDetail:\n" +
                    ex.Detail.InnerText +"\nStackTrace:\n" + ex.StackTrace);
            }
2) This code is for updating a list item through batch update
            try

            {
                string strBatch = " 2" +
                                       "a test data";
                XmlDocument xmlDoc1 = new System.Xml.XmlDocument();
                System.Xml.XmlElement elBatch = xmlDoc1.CreateElement("Batch");
                elBatch.SetAttribute("OnError", "Continue");
                elBatch.SetAttribute("ListVersion", "1");
                elBatch.InnerXml = strBatch;
                XmlNode ndReturn = listService.UpdateListItems("Tasks", elBatch);
                MessageBox.Show(ndReturn.OuterXml);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }