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ConnPack.WriteInt32(aNextPDUId, ref message); ConnPack.WriteInt32(aEntry.mEntryType, ref message); ConnPack.WriteDateTime(aEntry.mStartDate.mIsNull, aEntry.mStartDate.mDate, ref message); ConnPack.WriteDateTime(aEntry.mEndDate.mIsNull, aEntry.mEndDate.mDate, ref message); if(aEntry.mEntryType == RAGNUtils.EEvent) { ConnPack.WriteInt32(aEntry.mDisplayTime, ref message); } ConnPack.WriteInt8(aEntry.mAlarmFlag, ref message); if( aEntry.mAlarmFlag != 0 ) { ConnPack.WriteInt16(aEntry.mAlarmDays, ref message); ConnPack.WriteInt16(aEntry.mAlarmMinutes, ref message); } ConnPack.WriteInt8(aEntry.mCrossedOut, ref message); ConnPack.WriteInt8(aEntry.mTentative, ref message); ConnPack.WriteInt8(aEntry.mDayNote, ref message); ConnPack.WriteUNCData(aEntry.mText, ref message); aNextPDUId++; aStream.Write(ConnPack.AsByteArr(ref message)); }
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If we wanted to maintain a good cache of device data then we would want to respond to the entry created response PDU by storing the instance identi er, but, for the purposes of this application, we can just ignore the response. Because we are avoiding handling repeating entries in any detail, we will not allow the user to create an anniversary. It would be possible to create one using the event form, but without repeat information it is pointless. Deletion simply requires obtaining the instance date and identi er and composing the appropriate PDU.
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private void DeleteButton_Click(object sender, System.EventArgs e) { mLostPhone = false; if(ApptList.SelectedIndices.Count <= 0) { return; } int editIndex = ApptList.SelectedIndices[0]; RAGNEntry delEntry = (RAGNEntry)ApptList.Items[editIndex].Tag; if (MessageBox.Show ("Are you sure you want to delete this entry ", "Confirm Delete", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2 ) == DialogResult.Yes && !mLostPhone) { RAGNUtils.WriteDeleteInstance(mStream, ref mNextMessageId, ref delEntry.mInstance); StatusBox.Text = "Deleting entry - please wait"; mPendingRead = true;
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mReadingLength = true; mStream.Read(4); ApptList.Items.RemoveAt(editIndex); if(ApptList.Items.Count == 0) { mGotAppts = false; } } SetButtonStates(); }
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/// Delete an instance public static void WriteDeleteInstance ( BALApplicationAsyncStream aStream, ref int aNextPDUId, ref RAGNInstance aInstance ) { ArrayList message = new ArrayList(); ConnPack.WriteInt32(ERAgnCmdDeleteInstance, ref message); ConnPack.WriteInt32(aNextPDUId, ref message); ConnPack.WriteInt32(aInstance.mInstanceId, ref message); ConnPack.WriteDateTime(aInstance.mDate.mIsNull, aInstance.mDate.mDate, ref message); ConnPack.WriteInt32(ECurrentInstance, ref message); aNextPDUId++; aStream.Write(ConnPack.AsByteArr(ref message)); }
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That concludes the applications associated with the SMS, Contacts and Agenda services. These were an almost arbitrary selection chosen to illustrate some of the more common and more generally useful services. Not all the features included in the services created in earlier chapters were used (for example, to-do lists were omitted for reasons of space and because they did not demonstrate any new principles), but the intention was to show what can be achieved by creating a specialized service for a Symbian OS smartphone. The most obvious direction in which GUI applications could be extended is that of integration. The SMS application, or a similar MMS or email application, is crying out for integration with contacts data, and a specialized meetings application could be created by selecting contacts entries and sending them messages while associating them with an appointment. Although I have chosen to demonstrate GUI applications, the services will work at least as well with other applications such as databases or corporate systems (these are dif cult to use as illustrations in a book). I used command-line applications to create and debug all of the device services. This kind of enterprise-level integration would allow Symbian OS smartphones to form a part of a much larger system.
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Earlier chapters have described how to create specialized services based on the Symbian OS Connectivity frameworks either custom servers or socket servers. These are pretty good and are adequate for most purposes, but some developers may still want to use services that are general-purpose TCP/IP socket servers. There are a number of reasons why you might want to use such a server: You may have a server that has not been designed for use with Connect and you may want to use it without converting it. You may need to get around the assumptions imposed by the custom server framework (being forced to operate within the RunL() of a process that you cannot debug has its limitations). You may want to create a service that can be used with a wide range of Symbian OS smartphones. I have designed the services described in this book so as to separate out the specialized functionality for reuse, but this still requires some different code for pre v8.0 and post v8.0 Symbian OS smartphones. Having decided that you want to use a general-purpose TCP/IP server, there are several obstacles to be overcome: 1. You need to either use a xed port number or have some way of publishing a port number. 2. You need a method of connecting a client on the PC to the listening port on the phone. 3. You need a method of starting the socket server when required. I do not have any good solution to problem 1 you will probably have to use a xed port number. This is frowned upon in theory, as xed TCP/IP port numbers are supposed to be allocated by the IANA, but, in practice,
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