Agile Sharepoint development by 21apps and Andrew Woodward MVP

Ven,
The reason is probably due to you not setting any policy bindings, as in the post example:-

policy.PolicyRoleBindings.Add(oWebApplication.PolicyRoles.GetSpecialRole(SPPolicyRoleType.FullControl));

Hi,
I am trying to get the users from the "Policy of Web Application" in Central Administration through Object Model

and also trying to add users to the same Policy through object model. I am using the following code to achieve

this. But I am getting an "Object Reference Not Set to an Instance of an Object" exception when I am trying to call

the Update Method of the SPWebApplication object.
Please help me. The strange thing happening here is,when I am trying to add the users to the WebApplication policy,

the users are getting added to though the update fails. The next time when I debug the application, I do see the

new users added though the update failed. Moreover, I am not able to see the newly added users in the "Policy For

Web Application" section of the Central Administration. Can anyone please help me out. Here is the code which I am

using to achieve this.

SPFarm farm = SPFarm.Local;
SPWebService service = farm.Services.GetValue("");
foreach(SPWebApplication webApp in service.WebApplications)
{
if(webApp.Name == "My Web App")
{
webApp.ZonePolicies(SPUrlZone.Default).Add("username","displayname");
webApp.Update(); // I am getting the Object Reference error at this line
}
}


Please help me ASAP.