Solved

Get (ID) field from Listview Clicked Item

Posted on 2013-06-02
3
2,478 Views
Last Modified: 2016-10-03
Im useing Delphi XE4. Im using an sqLite database(IOS APP).

I have a listView (lvCustomers) i use a sqlDatsaSet to display all the records from the Customers table. I just drag and drop from the Data Explorer, and use Live Bindings to link to the listview(lvCustomers) from the sqlDatsSet.

I want to click on the customers name in the listview(lvCustomers) and get the ID field from the customers table .

I will use this ID to join to the invoice table in the next listvew to display all invoices that belong to the customer ID that i click on (lvCustomer)

How can I get the field Id (Customers.ID) from the item that is clicked on in the listview(lvCustomers)?

It seems TListViewItem has a Tag property. Is it possible to use this with the live binder or without the live binder to grab the ID field ?
0
Comment
Question by:Grant1842
3 Comments
 
LVL 26

Assisted Solution

by:Sinisa Vuk
Sinisa Vuk earned 50 total points
ID: 39215416
Tag can be used but if you load dataset on your own.
Try to get id field with plain old:
  sqlDatsaSet.FiledByName('IDField').AsInteger
Positioning on LV will make scroll in dataset thought. Try to join table on dataset level.
0
 
LVL 4

Assisted Solution

by:rotem156
rotem156 earned 50 total points
ID: 39217039
You're welcome.
0
 
LVL 6

Accepted Solution

by:
House_of_Dexter earned 400 total points
ID: 39224531
I don't have XE4...so I can't help you there...I wouldn't get caught up on the new properties...

You want to figure out how they handle SubItems...You use the SubItem to attach your ID value to it and then grab it on the click event...If you can't figure that out...Then create a StringList that coincides with your ListViewItems...and match Names from each list...and then take the ID value from the StringList...

ie. FList[0] = lvCustomers.Items.Items[0].Detail

As you add the Items to your ListView...add the same values to your FList...like
//coded without a compiler...so I make no guarantees ;)


procedure TForm1.AddRecords(aDataSet: TDataset);
var
  a_Index: integer;
begin
//check to make sure the Dataset values line up with the TListViewItems..
//this is not a method I like...but if you can't figure out how to add a SubItem...It might be your only way
  aDataSet.First;
  while not  aDataSet.Eof do
  begin
    AddRecord(aDataSet.FieldByName('Name').AsString,    (aDataSet.FieldByName('Name').AsInteger);
     aDataSet.Next;
  end;
end;

procedure TForm1.AddRecord(aName: string; aId: integer);
begin  
  FList.AddObject(aName, pointer(aID));//use this method if you can't figure out how to add subitems...  
end;

function TForm1.GetID(aName: string): integer;
var
  a_Index: integer;
begin
  Result := 0;
  for a_Index := 0 to FList.Count -1 do
  begin
     if aName = FList[a_Index] then
     begin
        Result := integer(FList.Objects[a_Index]);
        break;
      end;
  end;
end;

Open in new window

0

Featured Post

Netscaler Common Configuration How To guides

If you use NetScaler you will want to see these guides. The NetScaler How To Guides show administrators how to get NetScaler up and configured by providing instructions for common scenarios and some not so common ones.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How to convert wav to mp3 in delphi 9 206
How to fill array with TArray.Create? 14 90
Delphi TcxGrid group footer summary 3 279
Multi-layered image in FireMonkey 9 39
This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
In a recent question (https://www.experts-exchange.com/questions/28997919/Pagination-in-Adobe-Acrobat.html) here at Experts Exchange, a member asked how to add page numbers to a PDF file using Adobe Acrobat XI Pro. This short video Micro Tutorial sh…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

825 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question