01 editing a table in cxgrid

7/30/2019 01 Editing a Table in CxGrid

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Editing a table in cxGrid

Version 1.0

05.11.2008

Author:Alen Markov

Version History

Version Date Name Description

1.0 05.11.2008 AMA Initial Version


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Editing a table in cxGrid / Notes by Alen Markov Seite 2

INHALT

1 Question....................................................................................................................... 31.1 Testtable................................................................................................................................................. 31.2 4 Components for accessing the DB with that table .............................................................................. 4

1.2.1 TDataSource.................................................................................................................................. 41.2.2 TIBQuery........................................................................................................................................ 51.2.3 TIBDatabase.................................................................................................................................. 61.2.4 TIBTransaction............................................................................................................................... 7

1.3 cxGrid - DataController - Datasource ..................................................................................................... 81.4 Defining the columns which the cxGrid should display .......................................................................... 81.5 Making cells editable ............................................................................................................................ 121.6 Display.................................................................................................................................................. 131.7 Problem ................................................................................................................................................ 14

2 Solution...................................................................................................................... 152.1 Replace TIBQuery through TIBDataset................................................................................................ 152.2 TIBDataSet ........................................................................................................................................... 16

2.2.1 SelectSQL.................................................................................................................................... 162.2.2

Datenmengen Editor .................................................................................................................... 18


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1 Question

I want to be able to edit a normal table in cxGrid.

1.1 Testtable

On the Firebird server I created a simple Testdatabase

And inserted 2 records


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1.2 4 Components for accessing the DB with that table

Nun habe ich ein cxGrid auf's Formular gelegt. Damit die Tabelle im Grid angezeigt wird, habe ich diemarkierten 4 Komponenten auf's Formular gelegt:

The properties of that 4 components are:

1.2.1 TDataSource


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1.2.2 TIBQuery

The property "SQL" from TIBQuery:


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1.2.3 TIBDatabase

Property DatabaseName: LOGO20:E:\Drive_i\LtxNummer\Daten\LTXNUMMER.GDBProperty Params:


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1.2.4 TIBTransaction


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1.3 cxGrid - DataController - Datasource

So the cxGrid knows which data has to be displayed, we have to choose here the DataSource:

1.4 Defining the columns which the cxGrid should display


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1.5 Making cells editable

Um jetzt im Grid Daten editieren zu knnen, habe ich noch diese Properties auf TRUE gesetzt:


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1.6 Display

The Grid is now showing the table:

Clicking in a cell, the cell is marked:


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Klicking on the same cell again, the cursor shows up - it seems like it's possible now to edit the cell

1.7 Problem

The Problem is:The cell is NOT editable!(If you try to type something, nothing shows up in the cell! The value can NOT be changed!)


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2 Solution

2.1 Replace TIBQuery through TIBDataset

Das TDataSource zeigt jetzt auf das IBDataSet1:

IBDataSet1 is a TIBDataSet and the property "Database" shows on "IBDatabase1":

(The rest is the same as shown in the question above...)


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2.2 TIBDataSet

2.2.1 SelectSQL

TIBDataSet also has a property "SelectSQL" (I inserted here the same SQL as I did before in TIBQuery).Setting the property ACTIVE to TRUE, the cxGrid is already showing the table:


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Note: At this moment, the properties- DeleteSQL- InsertSQL- ModifySQL- RefreshSQL

are all still empty...

Compiling the whole thing, it looks the same as with the TIBQuery before:The cells are still NOT not ediable!(also note that in the Navigator the Buttons like "+" and "-" are disabled)


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2.2.2 Datenmengen Editor

To make the cells in the cxGrid ediable (and that the navigator Buttons "+" and "-" become enabled),it was necessary to do this (sorry, just have the german version - but it should be clear with the screenshots):

Auf "Tabellenfelder lesen" klicken:


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That way the SQL Statements are automatically created:


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Looking now in the objectinspector at the properties- DeleteSQL- InsertSQL- ModifySQL

then the above created SQL statements can be found in them now, for example:


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Don't forget to set the property ACTIVE now to TRUE again.In the preview of the cxGrid you can alredady see that the navigator buttons "+" and "-" are enabled now:

And the cells are now editable:(When you change the value of a cell this way, the database is automatically updated!)

01 editing a table in cxgrid

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