CAML查询仅从SharePoint 2007检索已发布的页面？

Question

I am currently retrieving all pages and filtering out ones that are not published in the code, checking whether DateTime.Now is smaller than this:

static readonly DateTime IMMEDIATE_PUBLISH = new DateTime(1900, 1, 1);

public static DateTime PublicationDate(this SPListItem item)
{
    // get start publish date
    PublishingPage page = item.Publishing();
    if (page != null)
    {
        bool isPublished = (page.ListItem.File != null)
            ? (page.ListItem.File.Level == SPFileLevel.Published)
            : true;
        bool isApproved = (page.ListItem.ModerationInformation != null)
            ? (page.ListItem.ModerationInformation.Status == SPModerationStatusType.Approved)
            : true;
        if (isPublished && isApproved && (DateTime.Now < page.EndDate))
        {
            return page.StartDate == IMMEDIATE_PUBLISH ? page.CreatedDate : page.StartDate;
        }
        return DateTime.MaxValue;
    }
    // not a scheduled item. treat as published
    return DateTime.MinValue;
}

What would be the equivalent CAML query, so that I SharePoint doesn't pull unnecessary items from the database?

Answer 1

The following is an example of the CAML query for checking a document is published. I'm aware this is a fairly old question but hopefully this might be of use to the next person who googles how to do this:

<Query>
    <Where>
        <And>
            <Or>
                <Leq>
                    <FieldRef Name='PublishingStartDate'/>
                    <Value Type='DateTime' IncludeTimeValue='TRUE'>
                        <Today/>
                    </Value>
                </Leq>
                <IsNull>
                    <FieldRef Name='PublishingStartDate'/>
                </IsNull>
            </Or>
            <Or>
                <Geq>
                    <FieldRef Name='PublishingExpirationDate'/>
                    <Value Type='DateTime' IncludeTimeValue='TRUE'>
                        <Today/>
                    </Value>
                </Geq>
                <IsNull>
                    <FieldRef Name='PublishingExpirationDate'/>
                </IsNull>
            </Or>
        </And>
    </Where>
</Query>

Answer 2

In my opion you're checking way too much.

You should only check "PublishingStartDate" <= Today and "PublishingExpirationDate" > Today

For ordinary users you'll not find pages that isn't published/approved.
For users with rights to find these pages you probably don't want to exclude them just because the current version isn't published/approved. If you only want pages where at least one version is published then you can add a check for "_UIVersion" >= 512