Beginners Example

wriedmann · Post by **wriedmann** » Wed Jul 07, 2021 3:46 am

Hi Joe,
I will do that, of course.
WPF is even easier to do (for me) as most of my pure X# programming is done in WPF (and XIDE).
My WPF windows are all done in pure code, and that helps me be more flexible.
Wolfgang

wriedmann · Post by **wriedmann** » Wed Jul 07, 2021 6:32 am

Hi Joe,
here it is:

WPFDBF.zip: (3.19 KiB) Downloaded 137 times

It seems even easier than the Windows Forms example.
Wolfgang

FFF · Post by **FFF** » Wed Jul 07, 2021 7:32 am

Very nice, Wolfgang.
Me being a WPF-noob - is there an easy way to change the font used in the datagrid?

wriedmann · Post by **wriedmann** » Wed Jul 07, 2021 7:40 am

Hi Karl,
really hard <g>:

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_oDataGrid:FontFamily	:= FontFamily{ "Courier New" }
_oDataGrid:FontSize		:= 20

Wolfgang

FFF · Post by **FFF** » Wed Jul 07, 2021 8:25 am

Blush...
(But, by way of excuse, i had looked in the api browser, there's no entry regarding font in DataGrid's properties...)

While blushing

, Datagrid has a backround property, but that's only the little rectangles fencing the scrollbar.
Probably, i need oDataGrid:CellStyle := Style{ } ? But i don't get, what/which "type" the style constructor wants...
THX!

wriedmann · Post by **wriedmann** » Wed Jul 07, 2021 8:32 am

Hi Karl,
unfortunately it is not that easy. This is code from my own class library:

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oHeaderStyle := Style{ TypeOf( System.Windows.Controls.Primitives.DataGridColumnHeader ) }
oHeaderStyle:Setters:Add( Setter{ System.Windows.Controls.Primitives.DataGridColumnHeader.BackgroundProperty, MVVMControlSettings.DataGridHeaderBackground } )
oHeaderStyle:Setters:Add( Setter{ System.Windows.Controls.Primitives.DataGridColumnHeader.SeparatorVisibilityProperty, Visibility.Visible } )
oHeaderStyle:Setters:Add( Setter{ System.Windows.Controls.Primitives.DataGridColumnHeader.SeparatorBrushProperty, MVVMControlSettings.DataGridVerticalGridLinesBrush } )
oHeaderStyle:Setters:Add( Setter{ System.Windows.Controls.Primitives.DataGridColumnHeader.PaddingProperty, MVVMControlSettings.DataGridHeaderPadding } )
self:ColumnHeaderStyle := oHeaderStyle
oCellStyle := Style{ TypeOf( System.Windows.Controls.DataGridCell ) }
oCellStyle:Setters:Add( Setter{ System.Windows.Controls.DataGridCell.PaddingProperty, MVVMControlSettings.DataGridCellPadding } )
self:CellStyle := oCellStyle

Sometimes it is hard to work without XAML.....
Wolfgang

FFF · Post by **FFF** » Wed Jul 07, 2021 8:54 am

Argh...
I think i sort of understand this, so to play further, could you solve "MVVMControlSettings"? Probably a Using missing, but as the apibrowser knows nothing about this term, so what to add?

wriedmann · Post by **wriedmann** » Wed Jul 07, 2021 9:03 am

Hi Karl,
that is my static settings class - I have copied this code from there.

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MVVMControlSettings.DataGridHeaderPadding := System.Windows.Thickness{ 5, 5, 5, 5 }
MVVMControlSettings.DataGridCellPadding := System.Windows.Thickness{ 6, 6, 6, 6 }  // geht aktuell nicht
MVVMControlSettings.DataGridAlternatingRowBackground := System.Windows.Media.SolidColorBrush{ System.Windows.Media.Colors.Gainsboro }
MVVMControlSettings.DataGridVerticalGridLinesBrush := System.Windows.Media.SolidColorBrush{ System.Windows.Media.Color.FromRgb( 170,170,170 ) }
MVVMControlSettings.DataGridHeaderBackground := System.Windows.Media.SolidColorBrush{ System.Windows.Media.Color.FromRgb( 238, 238, 238 ) }
MVVMControlSettings.DataGridRowHeight := 20

These are the defaults for all my applications, but are settable on an application level.
Normally, you use stylesheets for this - that is easier.
But since I don't select always the easiest way, but the way that seems me more flexible, sometimes I have to do strange things.

But nevertheless, for some styles I do add a XAML stylesheet as resource into my WPF applications.

: ServerMan_Ressources.png (5.49 KiB) Viewed 1648 times

Maybe I should publish a full featured WPF application as sample.
Wolfgang

FFF · Post by **FFF** » Wed Jul 07, 2021 9:20 am

Hi Wolfgang,
thx very much, now it works.

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Maybe I should publish a full featured WPF application as sample

That surely would be helpfull - best including access to PG

wriedmann · Post by **wriedmann** » Wed Jul 07, 2021 9:39 am

Hi Karl,
PostgreSQL access is standard in my newer applications whenever I have the choice:

: ServerMan_Dependencies.png (11.04 KiB) Viewed 1647 times

The main problem is that I have several different libraries in my framework, for different GUI choices (WPF, Windows Forms, Console) and for different database backends (DBF, ADS, Oracle, MS SQL Server, MySQL, PostgreSQL, SQLite), and therefore I have to combine a lot of code into the same application/lib to not to have to share my entire framework.
What you see is one WPF application with only PostgreSQL access, but I have also applications that are accessing 3 or 4 different database backends.
Wolfgang

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