List Updating in SharePoint 2010 Programmatically Using VS 2010

Introduction

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

Question: What is a list?

In simple terms "When you create a custom list, a new empty list is created with just two columns - Title and Attachments. The list contains a single default view. Once you create the list, you can add more columns, views, and so on".

I think we are now good to go and implement this wonderful concept.

Step 1: Create a custom list and modify the view.

Step 2: Open SharePoint 2010 Central Administration and navigate to specific site.

Step 3: Open Visual Studio 2010 and create an "Empty SharePoint project":

Step 4: Select "Deploy as a farm solution" and click on the "Finish" button. Now an empty project will be created:

Output2.1.jpg

Step 5: Add a new visual webpart for that project:

Step 6: The complete code of visualwebpart1usercontrol.ascx looks like this:

<%@ Assembly Name="$SharePoint.Project.AssemblyFullName$" %>

<%@ Assembly Name="Microsoft.Web.CommandUI, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>

<%@ Register TagPrefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls"

Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>

<%@ Register TagPrefix="Utilities" Namespace="Microsoft.SharePoint.Utilities" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>

<%@ Register TagPrefix="asp" Namespace="System.Web.UI" Assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" %>

<%@ Import Namespace="Microsoft.SharePoint" %>

<%@ Register TagPrefix="WebPartPages" Namespace="Microsoft.SharePoint.WebPartPages"

Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="UpdateListWebPartUserControl.ascx.cs"

Inherits="ListUpdateApplication.UpdateListWebPart.UpdateListWebPartUserControl" %>

<div>

<table>

<tr>

<asp:label id="Label1" runat="server" text="Update List Data via Object Modelling - SharePoint 2010"

font-bold="true" font-size="Large" font-names="Verdana" forecolor="Maroon"></asp:label>

</td>

</tr>

<tr>

<td>

<asp:label id="Label6" runat="server" text="Please Enter ID" font-size="Large" font-names="Verdana"

font-italic="true"></asp:label>

</td>

<td>

<asp:textbox id="TextBox4" runat="server"></asp:textbox>

</td>

</tr>

<tr>

<td>

<asp:label id="Label2" runat="server" text="Please Enter FirstName" font-size="Large"

font-names="Verdana" font-italic="true"></asp:label>

</td>

<td>

<asp:textbox id="TextBox1" runat="server"></asp:textbox>

</td>

</tr>

<tr>

<td>

<asp:label id="Label3" runat="server" text="Please Enter LastName" font-size="Large"

font-names="Verdana" font-italic="true"></asp:label>

</td>

<td>

<asp:textbox id="TextBox2" runat="server"></asp:textbox>

</td>

</tr>

<tr>

<td>

<asp:label id="Label4" runat="server" text="Please Enter Age" font-size="Large" font-names="Verdana"

font-italic="true"></asp:label>

</td>

<td>

<asp:textbox id="TextBox3" runat="server"></asp:textbox>

</td>

</tr>

<tr>

<asp:button id="Button1" runat="server" text="Update Data" font-names="Verdana" width="166px"

backcolor="Orange" font-bold="True" onclick="Button1_Click" />

</td>

</tr>

<tr>

<asp:label id="Label5" runat="server" font-bold="true" font-names="Verdana" forecolor="Maroon"></asp:label>

</td>

</tr>

</table>

</center>

</div>

Step 7: The complete code of visualwebpart1usercontrol.ascx.cs looks like this:

using System;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using Microsoft.SharePoint;

namespace ListUpdateApplication.UpdateListWebPart

{

public partial class UpdateListWebPartUserControl : UserControl

{

protected void Page_Load(object sender, EventArgs e)

{

TextBox4.Focus();

}

protected void Button1_Click(object sender, EventArgs e)

{

if (string.IsNullOrEmpty(TextBox4.Text))

{

Label5.Text = "Please Enter Some Values";

}

else

{

SPSite site = SPContext.Current.Site;

SPWeb web = site.OpenWeb();

web.AllowUnsafeUpdates = true;

SPList list = web.Lists["Student"];

SPListItem item = list.GetItemById(Convert.ToInt32(TextBox4.Text));

item["First Name"] = TextBox1.Text;

item["Last Name"] = TextBox2.Text;

item["Age"] = Convert.ToInt32(TextBox3.Text); item.Update();

Label5.Text = "Data Successfully Updated";

TextBox1.Text = string.Empty;

TextBox2.Text = string.Empty;

TextBox3.Text = string.Empty;

TextBox4.Text = string.Empty;

}

Step 8: Deploy the solution file and add the created webpart to the SharePoint site:

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

Step 10: When updating the list the output of the application looks like this:

I hope this article is useful for you.