Add User to Group in SharePoint 2010 Programmatically Using VS 2012

<asp:textbox id="TextBox1" runat="server" width="117px"></asp:textbox>

</td>

</tr>

<tr>

<td colspan="2">

<asp:button id="Button1" runat="server" text="Add User to Group" forecolor="Orange"

font-bold="true" backcolor="Black" onclick="Button1_Click" width="189px" />

</td>

</tr>

<tr>

<td colspan="2">

<asp:label id="Label4" runat="server" font-bold="true"></asp:label>

</td>

</tr>

</table>

</div>

</center>

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 AddingUserGroupApp.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

{

SPWeb web = SPContext.Current.Web;

SPGroup group = web.Groups[TextBox2.Text];

SPUser user = web.EnsureUser(TextBox1.Text);

group.AddUser(user.LoginName, user.Email, user.Name, user.Notes);web.Update();

Label4.Text = TextBox1.Text + " - User Added to Group 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: Data entering output of the application looks like this:

Step 9: User added to group output of the application looks like this:

I hope this article is useful for you.