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/// Fetch all contacts public static void WriteFetchAllContacts ( BALApplicationAsyncStream aStream, ref int aNextPDUId ) { ArrayList message = new ArrayList(); ConnPack.WriteInt32(ERCntCmdFetchAllContacts, ref message); ConnPack.WriteInt32(aNextPDUId, ref message); ConnPack.WriteInt8(0, ref message); // Do not fetch all fields aNextPDUId++; aStream.Write(ConnPack.AsByteArr(ref message)); } /// Fetch more contacts public static void WriteFetchMoreContacts ( BALApplicationAsyncStream aStream, ref int aNextPDUId) { ArrayList message = new ArrayList(); ConnPack.WriteInt32(ERCntCmdFetchMoreContacts, ref message); ConnPack.WriteInt32(aNextPDUId, ref message); ConnPack.WriteInt8(0, ref message); // Do not fetch all fields aNextPDUId++; aStream.Write(ConnPack.AsByteArr(ref message)); }
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As with the SMS application, we need to extend the ServiceRead() method to handle the incoming contact details, and we will automatically fetch more contacts until we run out. In the example applications, I have just extended the ServiceRead() method for each new purpose, but this is unwieldy. If I had more response codes, I would put in place a more maintainable structure.
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/// <summary> /// Handle a PDU read from the device /// </summary> private void ServiceRead(int aOpCode, int aPDUId, ref byte[] aBuff, ref int aReadPos) { switch(aOpCode) { ... case(RCNTUtils.ERCntCmdContactsReply): StatusBox.Text = "Reading Contacts -please wait"; bool carryOn = true; bool gotAtLeastOne = false; while(carryOn) { RCNTContact contact = new RCNTContact(); carryOn = RCNTUtils.ReadContact( ref aBuff, ref aReadPos, ref mTemplateFields, ref contact); if(carryOn) { gotAtLeastOne = true; AddCard(ref contact, -1); } }
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if(!gotAtLeastOne) { mWantToFetchContacts = false;} if(gotAtLeastOne) { mGotContacts = true;} break; ... } // If we have operations that we want to carry out then trigger them. if(mWantToFetchTemplateFields) { ... } else if(mWantToFetchContacts) { // Ask for more contacts RCNTUtils.WriteFetchMoreContacts(mStream, ref mNextPDUId); StatusBox.Text = "Fetching more contacts - please wait"; mPendingRead = true; mReadingLength = true; mStream.Read(4); } else { ClearPendingReads(); StatusBox.Text = ""; } SetButtonStates(); }
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/// Read details of a contact - terminated by a negative card ID static public bool ReadContact(ref byte[] aBuff, ref int buffOffset, ref ArrayList aTemplateFields, ref RCNTContact aContact) { int cardId = ConnPack.ReadInt32( ref aBuff, ref buffOffset); if(cardId < 0) {return false;} aContact.mId = cardId; aContact.mFields = new ArrayList(); int fieldId = ConnPack.ReadInt32( ref aBuff, ref buffOffset); while(fieldId != -1) { RCNTField fieldData = new RCNTField(); fieldData.mFieldId = fieldId; fieldData.mChanged = false; fieldData.mFieldType = new ArrayList(); int typeId = ConnPack.ReadInt32( ref aBuff, ref buffOffset); while(typeId >= 0) { fieldData.mFieldType.Add(typeId); typeId = ConnPack.ReadInt32( ref aBuff, ref buffOffset); } fieldData.mMapping = ConnPack.ReadInt32( ref aBuff, ref buffOffset);
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int fieldType = ConnPack.ReadInt32( ref aBuff, ref buffOffset); System.Text.StringBuilder label; bool recognizedField = false; switch(fieldType) { case(KStorageTypeText): ConnPack.ReadData( ref aBuff, ref buffOffset, out label); System.Text.StringBuilder fieldText; ConnPack.ReadData( ref aBuff, ref buffOffset, out fieldText); fieldData.mFieldLabel = label.ToString(); fieldData.mFieldText = fieldText.ToString(); recognizedField = true; break; default: // unrecognized field type break; } // If a recognized field type then add it to the contact if(recognizedField) {aContact.mFields.Add(fieldData) ;} fieldId = ConnPack.ReadInt32( ref aBuff, ref buffOffset); }//endwhile // Check that labels are set and use the template if necessary for(int i = 0 ; i < aContact.mFields.Count ; i++) { RCNTField field = (RCNTField)aContact.mFields[i]; if(field.mFieldLabel.Length < 1) { field.mFieldLabel = FindFieldLabelByType(ref aTemplateFields, ref field); aContact.mFields[i] = field; } } return true; }
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At this point we need to use the template data to supply labels.
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// Find the label of a field of a set of types - or return "" for // not found static public string FindFieldLabelByType ( ref ArrayList aTemplateFields, ref RCNTField aContactField) { string fieldLabel = ""; for(int tFieldi = 0 ; tFieldi < aTemplateFields.Count ; tFieldi++) { RCNTField tempField = (RCNTField)aTemplateFields[tFieldi]; if(DoFieldTypesMatch(ref tempField, ref aContactField)) { fieldLabel = tempField.mFieldLabel; break; } if(fieldLabel.Length > 0)
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{ break; } }// endfor each field in the template return fieldLabel; } /// As contact fields are identified uniquely by the combination of /// field types and mapping, we need to compare two fields by /// comparing all the field types and the mapping. /// If any field type is not found in both then there is a mismatch. static public bool DoFieldTypesMatch( ref RCNTField field1, ref RCNTField field2) { bool retVal = true; if(field1.mFieldType.Count != field2.mFieldType.Count) { retVal = false; } if(field1.mMapping != field2.mMapping) { retVal = false; } for(int i1 = 0 ; (i1 < field1.mFieldType.Count) && retVal ; i1++) { int type1 = (int)field1.mFieldType[i1]; bool foundMatch = false; for(int i2 = 0 ; i2 < field2.mFieldType.Count ; i2++) { if(type1 == (int)field2.mFieldType[i2]) { foundMatch = true; break; } } if(!foundMatch) { retVal = false; } }//endfor each field type in first set return retVal; }
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We can then add each contact to the list of contacts. In our summary list we want to show the rst and last names. These are not necessarily xed elds and so we have to search for the eld text based on a eld type (note not all eld types in this case).
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/// <summary> /// Add a card to the contacts list view /// if aWhere is negative then append the item, otherwise insert it /// </summary> private void AddCard(ref RCNTContact aContact, int aWhere) { System.Windows.Forms.ListViewItem newItem = new ListViewItem();
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