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Within the edit form we will not try to allow the user to edit the elds in place, but whenever a eld is selected we will copy the label and value into text boxes and then re ect any changes to the value back to the value in the list.
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private void ContactDetailList_SelectedIndexChanged(object sender, System.EventArgs e) { FieldLabelBox.Clear(); FieldTextBox.Clear(); ListView.SelectedIndexCollection indices = ContactDetailsList.SelectedIndices; if( indices.Count >= 1) { int selIndex = indices[0]; RCNTField selField = (RCNTField)ContactDetailsList. Items[selIndex].Tag; FieldLabelBox.Text = selField.mFieldLabel; FieldTextBox.Text = selField.mFieldText; }//endif got a selection } private void FieldTextBox_TextChanged(object sender, System.EventArgs e) { ListView.SelectedIndexCollection indices = ContactDetailsList.SelectedIndices; if( indices.Count >= 1) { // Set the field text, mark it changed and update the list int selIndex = indices[0]; RCNTField selField = (RCNTField)ContactDetailsList. Items[selIndex].Tag; selField.mFieldText = FieldTextBox.Text; selField.mChanged = true; ContactDetailsList.Items[selIndex].SubItems[1].Text = FieldTextBox.Text; } //endif got a selection }
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This means that the button-click routine for the edit button has two logical parts to it. The rst part raises the dialog and writes a command to retrieve the contact data. The second part takes the data from the form and writes the changed details to the smartphone. This method also shows the use of the mLostPhone member. This is set to false before the dialog is raised and is checked afterwards. It will be set only if the currently connected smartphone disconnects while the dialog is raised. We use the same technique for all the button-click event handlers.
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private void EditButton_Click(object sender, System.EventArgs e) { if(ContactList.SelectedIndices.Count <= 0) { return; }
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mLostPhone = false; int editIndex = ContactList.SelectedIndices[0]; RCNTContact editContact = (RCNTContact)ContactList. Items[editIndex].Tag; mPendingEditContact = editContact.mId; ArrayList contactSet = new ArrayList(); contactSet.Add(mPendingEditContact); RCNTUtils.WriteFetchContactSet(mStream, ref mNextMessageId, ref contactSet ); StatusBox.Text = "Fetching contact details - please wait"; mPendingRead = true; mReadingLength = true; mStream.Read(4); mEditForm = new ContactEditForm(ref editContact); if(mEditForm.ShowDialog()== DialogResult.OK) { // Check for some fields changed bool newData = false; editContact = mEditForm.mContact; for(int fi = 0 ; fi < editContact.mFields.Count ; fi++) { RCNTField field = (RCNTField)mEditForm.mContact.mFields[fi]; if(field.mChanged) { newData = true; break; } } if(newData && !mLostPhone) { // Save the new contact RCNTUtils.WriteEditContact(mStream, ref mNextMessageId, ref editContact); StatusBox.Text = "Saving changes to contact - please wait"; mPendingRead = true; mReadingLength = true; mStream.Read(4); ContactList.Items.RemoveAt(editIndex); AddCard(ref editContact, editIndex); }// endif got new data }// endif OK from edit form SetButtonStates(); }
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The contact being viewed or edited is fetched using the command to retrieve a set of contacts, although in this case the set always contains only one entry.
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/// Fetch a set of contacts public static void WriteFetchContactSet ( BALApplicationAsyncStream aStream, ref int aNextMessageId, ref ArrayList aIds ) { ArrayList message = new ArrayList(); ConnPack.WriteInt32(ERCntCmdFetchContactSet, ref message); ConnPack.WriteInt32(aNextMessageId, ref message); ConnPack.WriteInt8(1, ref message); // Do fetch all fields
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for(int i = 0 ; i < aIds.Count ; i++) { int ID = (int)aIds[i]; ConnPack.WriteInt32(ID, ref message); } ConnPack.WriteInt32(-1, ref message); aNextMessageId++; aStream.Write(ConnPack.AsByteArr(ref message)); }
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When the contact details are received, we need to recognize that they are destined for the edit form. In order to access the edit form, a reference to it has been stored in EditButton_Click() and so the ServiceRead() method can overwrite the details. If this was slow then we would have an unfriendly dialog, but, in practice, the delay is not visible. If this model of raising the dialog and then correcting its data was not acceptable (because of delays) then we could have the EditButton_Click() method send the command to retrieve the contact details and have a method to raise the dialog called when the response is received. When we write an edited contact back to the phone, we can choose to send only those elds that have changed.
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/// Edit a contact public static void WriteEditContact( BALApplicationAsyncStream aStream, ref int aNextPDUId, ref RCNTContact aContact ) { ArrayList message = new ArrayList(); ConnPack.WriteInt32(ERCntCmdEditContact, ref message); ConnPack.WriteInt32(aNextPDUId, ref message); ConnPack.WriteInt32(aContact.mId, ref message); for(int i = 0 ; i < aContact.mFields.Count ; i++) { RCNTField field = (RCNTField)aContact.mFields[i]; if(field.mChanged) { for(int fi = 0 ; fi < field.mFieldType.Count ; fi++) { ConnPack.WriteInt32((int)field.mFieldType[fi], ref message); } ConnPack.WriteInt32(-1, ref message); ConnPack.WriteInt32(field.mMapping, ref message); ConnPack.WriteUNCData(field.mFieldText, ref message); } } ConnPack.WriteInt32(-1, ref message); aNextPDUId++; aStream.Write(ConnPack.AsByteArr(ref message)); }
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