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<concept xml:lang="en" id="GUID-22F74DA4-2CAB-5CA9-877C-0FC2F891E259"><title>Dictionary write streams</title><prolog><metadata><keywords/></metadata></prolog><conbody><p>Applications must construct an <codeph>RDictionaryWriteStream</codeph> object before they can write to a stream located in a dictionary store.</p> <p>To prepare a stream for writing, use the <codeph>RDictionaryWriteStream::AssignL()</codeph> or <codeph>RDictionaryWriteStream::AssignLC()</codeph> functions, passing a reference to the dictionary store and the UID associated with the stream.</p> <p>If no stream is associated with the UID, then a new stream is created. An association is made between the resulting stream ID and the UID.</p> <p>If a stream is currently associated with the specified UID, then the existing stream is prepared for replacement.</p> <p>The following code fragment is typical. <codeph>store</codeph> is a pointer to an opened dictionary store. <codeph>RDictionaryWriteStream::AssignLC()</codeph> opens the stream associated with the UID <codeph>theuid</codeph> and prepares the stream for writing:</p> <codeblock id="GUID-48CA0DB4-44D8-5E1C-8211-1EB21F2CBACD" xml:space="preserve">...

TUid theuid;

CDictionaryStore* store;

...

RDictionaryWriteStream outstream;

outstream.AssignLC(*store,theuid);

TSomeData data;

...

outstream << data;

outstream.CommitL()

CleanupStack::PopAndDestroy(); // cleanup the write stream

...

store->CommitL(); // commit changes to the dictionary store