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How to: Search Attachments of Items in a Folder for an Exact Phrase

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This example searches for the exact search string "office" in attachments to items in the Inbox.

This code sample uses a DAV Searching and Locating (DASL) syntax to specify a query. To construct the filter, the code sample first checks whether Instant Search is enabled in the default store to determine whether to use the ci_phrasematch keyword for an exact phrase match to "office" in any attachment. The sample then applies the filter to the GetTable method on the Inbox and obtains the results in a Table object. The code sample then displays the subject of each of the returned items in the Table.

The code sample specifies the Attachments property of an item using the namespace representation, http://schemas.microsoft.com/mapi/proptag/0x0EA5001E. The syntax for using the ci_phrasematch keyword is:

<PropertySchemaName> ci_phrasematch <ComparisonString>

If you use Microsoft Visual Studio to test this code sample, you must first add a reference to the Microsoft Outlook 12.0 Object Library component and specify the Outlook variable when you import the Microsoft.Office.Interop.Outlook namespace. The Imports or using statements must not occur right before the functions in the Code section but must be added before the public Class declaration. The following lines of code show how to do the import and assignment in Visual Basic and in C#:

using Outlook = Microsoft.Office.Interop.Outlook;
private void DemoSearchAttachments()
{
    string filter;
    const string PR_SEARCH_ATTACHMENTS =
        "http://schemas.microsoft.com/mapi/proptag/0x0EA5001E";
    if (Application.Session.DefaultStore.IsInstantSearchEnabled)
    {
        filter = "@SQL=" + "\""
            + PR_SEARCH_ATTACHMENTS + "\""
            + " ci_phrasematch 'office'";
        Outlook.Table table = Application.Session.GetDefaultFolder(
            Outlook.OlDefaultFolders.olFolderInbox).GetTable(
            filter, Outlook.OlTableContents.olUserItems);
        while (!table.EndOfTable)
        {
            Outlook.Row row = table.GetNextRow();
            Debug.WriteLine(row["Subject"]);
        }
    }
}
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