IntroductionToday, in this article let's play around with one of the interesting and most useful concepts in SharePoint 2010.
Question: What is ContentType?
In simple terms "Content types are reusable sets of columns create which can be used across multiple lists or libraries. They are considered to be a central component to manage metadata".
Step 1: Open SharePoint 2010 Central Administration and navigate to a specific site.
Step 2: Open up Visual Studio 2012 and try to "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="DeleteFieldContentTypeApp.VisualWebPart1.VisualWebPart1" %>
<div>
<table style="font-family: Verdana; text-align: center;">
<tr>
<td colspan="2">
<asp:label id="Label1" runat="server" text="Delete Field - Content Type - SharePoint 2010 via Visual Studio 2012"
font-bold="true" forecolor="Maroon" font-size="Large"></asp:label>
</td>
</tr>
<tr>
<td>
<asp:label id="Label2" runat="server" text="Please Enter ContentType Name:"></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 Field Name:"></asp:label>
</td>
<td>
<asp:textbox id="TextBox2" runat="server"></asp:textbox>
</td>
</tr>
<tr>
<td colspan="2">
<asp:button id="Button1" runat="server" text="Delete Field - SiteContentType " forecolor="Orange"
font-bold="true" backcolor="Black" onclick="Button1_Click" width="261px" />
</td>
</tr>
<tr>
<td colspan="2">
<asp:label id="Label4" runat="server" font-bold="true"></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 DeleteFieldContentTypeApp.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) || string.IsNullOrEmpty(TextBox2.Text))
{
Label4.Text = "Please Enter Some Values";
Label4.ForeColor = System.Drawing.Color.Red;
}
else{SPContentTypeCollection contentCollection = SPContext.Current.Web.ContentTypes;
SPContentType contentType = contentCollection[TextBox1.Text];
contentType.FieldLinks.Delete(TextBox2.Text);
contentType.Update();
Label4.Text = TextBox2.Text + " - Field Deleted Successfully";
Label4.ForeColor = System.Drawing.Color.Green;
TextBox1.Text = string.Empty;
TextBox2.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: Content type exists output of the application looks like this:
Step 9: Site content type field output of the application looks like this:
Step 10: Date entering output of the application looks like this:
Step 11: Field deleted output of the application looks like this:
I hope this article is useful for you.
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