C# Code to Perform SharePoint Group Specific Operations

C# code to find SharePoint web application Group's.

C# code to find SharePoint web application Group owner names.

public List<NameValuePair> GetGroupsWithOwner(string siteUrl)
{
List<NameValuePair> groups = new List<NameValuePair>();
using (SPSite site = new SPSite(siteUrl))
{
using (SPWeb web = site.OpenWeb())
{
string ownerName = string.Empty;
foreach (SPGroup group in web.Groups)
{
if (group.Owner is SPUser)
{
ownerName = (group.Owner as SPUser).Name;
}
else if (group.Owner is SPGroup)
{
ownerName = (group.Owner as SPGroup).Name;
}
groups.Add(new NameValuePair() { Value = group.Name, Name = string.Format("{0} ({1})", group.Name, ownerName) });
}
}
}
return groups;
}

C# code to remove specific group from given web application.

public List<NameValuePair> RemoveGroups(List<string> groups, string siteUrl)
{
List<NameValuePair> groupstatus = new List<NameValuePair>();
using (SPSite site = new SPSite(siteUrl))
{
using (SPWeb web = site.OpenWeb())
{
NameValuePair groupstat;
foreach (string group in groups)
{
groupstat = new NameValuePair();
try
{
web.Groups.Remove(group);
groupstat.Name = string.Format("{0} removed sucessfully.", group);
groupstat.Value = true;
}
catch (Exception ex)
{
groupstat.Name = string.Format("Error {1} while removing gorup {0}", group, ex.Message);
groupstat.Value = false;
}
groupstatus.Add(groupstat);
}
}
}
return groupstatus;
}

C# code to add user to web application.

C# code to set owner for web application.

public bool SetOwnerToGroup(string siteUrl, string groupName, string ownerName, bool isGroup)
{
bool isOwnerUpdated = false;
using (SPSite site = new SPSite(siteUrl))
{
using (SPWeb web = site.OpenWeb())
{
try
{
SPGroup group = web.Groups[groupName];
SPMember owner;
owner = web.Groups[ownerName];
group.Owner = owner;
group.Update();
}
catch (Exception ex)
{
isOwnerUpdated = false;
}
}
}
return isOwnerUpdated;
}

C# code to get group members.

C# code to check valid users.

public bool IsValidUser(string UserName, SPWeb web)
{
SPAdministrationWebApplication centralAdmin = SPAdministrationWebApplication.Local;
SPPrincipalInfo principle = SPUtility.ResolvePrincipal(centralAdmin, SPUrlZone.Default, UserName,
SPPrincipalType.User, SPPrincipalSource.All, false);
//( web , SPUrlZone.Default, UserName, SPPrincipalType.User, SPPrincipalSource.All, false);
if (principle == null)
return false;
return true;
}