Was working on getting Tasks assigned to a user on a custom DataViewWebPart titled “My Critical Tasks”.  It is easy to obtain past due items, but sometimes you need both Past Due and due in X number of days.  I was battling (as with anything SharePoint) with this CAML query, but finally got this one to work. 

On my XSL I render an indicator image based on the date each Task has, looks something like this (FIGURE 1).  I enabled editing as well, so a user can edit the status of the task right from the home page and modify the Due Date, Status, and Notes if needed!

FIGURE 1 – Tasks shown based on the User that is currently logged onto the MOSS Site.



FIGURE 2 – Editing a Task on the WebPart

<Query>
  <Where>
   <And>
        <And>
             <And>
               <Geq>
                  <FieldRef Name='DueDate' />
                  <Value Type='DateTime'>
                     <Today OffsetDays='-21' />
                  </Value>
               </Geq>
                <Eq>
                   <FieldRef Name='AssignedTo' />
                   <Value Type='Integer'><UserID/></Value>
                </Eq>
             </And>
            <Neq><FieldRef Name='Status'/><Value Type='Text'>Completed</Value></Neq>
        </And>
      <Or>
        <IsNotNull>
            <FieldRef Name='Related_x0020_Event'/>
        </IsNotNull>
        <IsNotNull>
            <FieldRef Name='Related_x0020_Course'/>
        </IsNotNull>
     </Or>
  </And>
   </Where>
   <OrderBy>
      <FieldRef Name='DueDate' Ascending='True' />
   </OrderBy>
</Query>

On my current project we had a requirement where based on the user browsing the SP Site, I needed to set the value of a MultiChoice Field to yes/no.

At first, I had difficult time figuring out why my code was not updating the value of my field.  Here is what works!  Specifically, the SystemUpdate(false) is what did it.

//always set the locked value to YES.
  properties.AfterProperties["Locked_x0020_and_x0020_ready_x00"] = "Yes";

  try
  {
      DisableEventFiring();
      properties.ListItem.SystemUpdate(false);
      EnableEventFiring();

  }
  catch (SPException ex) {}

Hope this helps you,
O