James Mann's Blog

Using class member variables will not work if you want to persist state between invocations. This seems to be due to the way sharepoint manages timer jobs. A solution is to use the Properties *property* which is exposed to all SPJobDefinition subtypes. This is a hashtable which accepts a key value pair. Usage:

public class SampleTimerJob : SPJobDefinition
{
    public SampleTimerJob(string jobName, SPWebApplication webApplication, string url, string email)
        : base(jobName, webApplication, null, SPJobLockType.ContentDatabase)
    {
        ContainerSite = url;
        Email = email;

        this.Title = "sample timer";
    }

    public string ContainerSite
    {
        get { return Properties["site"].ToString(); }
        set { Properties["site"] = value; }
    }

    public string Email
    {
        get { return Properties["email"].ToString(); }
        set { Properties["email"] = value; }
    }

    public override void Execute(Guid targetInstanceId)
    {
        SPSite site = new SPSite(ContainerSite);

        using (SPWeb web = site.OpenWeb())
        {

            SPUtility.SendEmail(web, false, false, Email,
                                "title",
                                "content");
        }
    }
}