Show List Versions 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 show list version?

In simple terms "It enables the showing of all the versions modified of any specific list in a SharePoint site".

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 "SharePoint Visual Web Part" project, as in:

Step 3: Select "Deploy as a farm solution" as in the following and click the "Finish" button.

Step 4: 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="VisualWebPart1.ascx.cs"

Inherits="GetListVersionApp.VisualWebPart1.VisualWebPart1" %>

<div style="text-align: center;">

<table>

<tr>

<td colspan="2">

<asp:label id="Label1" runat="server" text="Show Versions for List 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 List Name" 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 colspan="2">

<asp:listbox id="ListBox1" runat="server" height="246px" width="596px" font-names="Verdana"></asp:listbox>

</td>

</tr>

<tr>

<td colspan="2">

<asp:button id="Button1" runat="server" text="Show Versions - List" font-names="Verdana"

width="213px" backcolor="Orange" font-bold="True" onclick="Button1_Click" />

</td>

</tr>

<tr>

<td colspan="2">

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

</td>

</tr>

</table>

</div>

Step 5: The complete code of visualwebpart1usercontrol.ascx.cs looks like this:

using Microsoft.SharePoint;

using System;

using System.ComponentModel;

using System.Web.UI.WebControls.WebParts;namespace GetListVersionApp.VisualWebPart1

{

[ToolboxItemAttribute(false)]

public partial class VisualWebPart1 : WebPart

{

// Uncomment the following SecurityPermission attribute only when doing Performance Profiling using

// the Instrumentation method, and then remove the SecurityPermission attribute when the code is ready

// for production. Because the SecurityPermission attribute bypasses the security check for callers of

// your constructor, it's not recommended for production purposes.

// [System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityAction.Assert, UnmanagedCode = true)]

public VisualWebPart1()

{

}

protected override void OnInit(EventArgs e)

{

base.OnInit(e);

InitializeControl();

}

protected void Page_Load(object sender, EventArgs e)

{

TextBox1.Focus();

}

protected void Button1_Click(object sender, EventArgs e)

{

if (string.IsNullOrEmpty(TextBox1.Text))

{

Label5.Text = "Please Enter Some Values";

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

}

else

{

SPList list = SPContext.Current.Web.Lists[TextBox1.Text];

foreach (SPListItem item in list.Items)

{

SPListItemVersionCollection verColl = item.Versions;

foreach (SPListItemVersion version in verColl)

{

ListBox1.Items.Add("Version Numbers: " + version.VersionLabel + " Current Version: " + version.IsCurrentVersion);

}

}

Label5.Text = "Version Successfully Shown";

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

TextBox1.Text = string.Empty;

}

}

}

}

Step 6: Deploy the solution file and add the new webpart to a SharePoint site.

Step 7: The output of the application looks like this:

Step 8: The list versions output application looks like this:

I hope this article is useful for you.