Adding User to SharePoint Group through a custom ASP.NET web service.

I had a requirement to create a web service which would be used to add user to a SharePoint group. The code for it

public  string AddSharePointUser(string username,string password, string email){
string statusInfo = “”;
tring SharePointUrl = ConfigurationManager.AppSettings[“SharePointUrl”].ToString();
string SharePointGroup = ConfigurationManager.AppSettings[“SharePointGroup”].ToString();

using (SPSite oSiteCollection = new
oSiteCollection.AllowUnsafeUpdates = true;
using (SPWeb oWebsite = oSiteCollection.OpenWeb())
oWebsite.AllowUnsafeUpdates = true;
SPUser spUser = oWebsite.EnsureUser(username);

SPGroup spGroup = oWebsite.SiteGroups[SharePointGroup];

oWebsite.AllowUnsafeUpdates = false;


oSiteCollection.AllowUnsafeUpdates = false;


statusInfo = “User Created Successfully”;

statusInfo = “User Already Exists”;

catch (Exception ex)
statusInfo = ex.Message;

return statusInfo;


To run the web service successfully, we need to set the identity of application pool of the web service to SharePoint Administrator account.

Hope it helps.


Author: Nishant Rana

I love working in and sharing everything about Microsoft.NET technology !

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