Delete List Data With WCF Service in SharePoint 2010 Programmatically Using VS 2012

Introduction

Today, in this article let's play around with one of the interesting and most useful concepts in SharePoint 2010.

Question: What is delete list data with WCF service?

In simple terms "It deletes data from a SharePoint custom list using a client side environment via a WCF service".

Step 1: Open SharePoint 2010 Central Administration and navigate to a specific site.

Step 2: Open up Visual Studio 2012 and try to create a webforms project:

open-asp.net-webforms-application.jpg

Step 3: Remove the following reference for the project:

System.Data.Services.Client

Step 4: Add a new reference to the project. (For this you need to install ADO.NET Data Services.exe file from here.)

After installation, browse to the specific location at:

C:\Program Files (x86)\ADO.NET Data Services V1.5 CTP2\bin

Add this reference to project: Microsoft.Data.Services.Client.dll

Step 5: Add the service reference to the project, which should come up from the following link. (So here the site URL is http://win-5c3g1lanj3k:29782/ . This might be different based on your custom site URL. The other part is _vti_bin/ListData.svc which should be common to access of the service reference for any site.)

http://win-5c3g1lanj3k:29782/_vti_bin/ListData.svc

Step 6: The complete code of WebForm1.aspx looks like this:

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="DeleteListDataWCFServiceApp._Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

</head>

<body>

<div>

<div>

<table>

<tr>

<asp:Label ID="Label1" runat="server" Text="Delete List Data - WCF Data in SharePoint 2010 using VS 2012 "

Font-Bold="true" Font-Size="Large" Font-Names="Verdana" ForeColor="Maroon"></asp:Label>

</td>

</tr>

<tr>

<td>

<asp:Label ID="Label2" runat="server" Text="Please Enter StudentId" Font-Size="Large"

Font-Names="Verdana" Font-Italic="true"></asp:Label>

</td>

<td>

<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>

</td>

</tr>

<tr>

<asp:Button ID="Button2" runat="server" Text="Delete List Data" Font-Names="Verdana"

Width="166px" BackColor="Orange" Font-Bold="True" OnClick="Button2_Click" />

</td>

</tr>

<tr>

<asp:Label ID="Label5" runat="server" Font-Bold="true" Font-Names="Verdana" ForeColor="Maroon"></asp:Label>

</td>

</tr>

</table>

</div>

</center>

</div>

</form>

</body>

</html>

Step 7: The complete code of WebForm1.aspx.cs looks like this:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using DeleteListDataWCFServiceApp.ServiceReference1;

namespace DeleteListDataWCFServiceApp

{

public partial class _Default : System.Web.UI.Page

{

protected void Page_Load(object sender, EventArgs e)

{

TextBox1.Focus();

}

protected void Button2_Click(object sender, EventArgs e)

{

if (string.IsNullOrEmpty(TextBox1.Text))

{

Label5.Text = "Please Enter Some Values";

Label5.ForeColor = System.Drawing.Color.Red;

}

else

{

MainSiteDataContext objContext = new MainSiteDataContext(new Uri("http://win-5c3g1lanj3k:29782/_vti_bin/ListData.svc"));

objContext.Credentials = System.Net.CredentialCache.DefaultCredentials;

var deleteId = (from r in objContext.Students where r.Id == int.Parse(TextBox1.Text) select r).Single();

objContext.DeleteObject(deleteId);

objContext.SaveChanges();

Label5.Text = "Data Deleted Successfully";

Label5.ForeColor = System.Drawing.Color.Green;

TextBox1.Text = string.Empty;

}

Step 8: The output of the application before deleting data looks like this:

Step 9: The output of the application looks like this:

Step 10: The data entering output of the application looks like this:

Step 11: The data deleted from custom list (Students) output of the application looks like this:

I hope this article is useful for you.