Dynamic field in forms

Question

Hi there,
I'm working on SCSM forms customization and I'd like to reproduce the behavior of the priority field : change the value of a textbox based on the value of two other textboxes.
At the moment I successfully implemented a custom user control as shown here
http://blog.scsmsolutions.com/2011/08/create-custom-user-control-for-scsm-2010/, I can use the "UserControl_DataContextChanged"  method to set values while editing CI or WI but to reflect the new value of my textbox I have to apply changes
and refresh the form.
That's quite ok but it would be "nice to have" to have my textbox reflecting immediately the change. Does someone have any clue on that ?
Optionnal question when retrieving my instance (instance = (this.DataContext
asIDataItem);)
is there's a way to enumerate all available properties name ?
Mickael,
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Answer 1

Hi,
Thanks for answering !
Well I guess that if I could update the textbox.text value in real time then commit the value to the class' property when clicking apply would be OK.
For the moment I created a CI class and I'd like to include few financial information. So I added those properties (among others) to my class:
date_Achat : type date (the buying date of the asset)
dec_PrixAcquisition (the buying price)
dec_Amortissement (the amortization time)
dec_PrixResiduel (the remaining value of the asset)
So far here's what I've done, here is the code for the custom control :
<UserControl x:Class="SCSMControls_PrixResiduel.SCSMControl_PrixResiduel"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:scwpf="http://schemas.microsoft.com/SystemCenter/Common/UI/Wpf"
xmlns:sys="clr-namespace:System;assembly=mscorlib"
mc:Ignorable="d"
d:DesignHeight="300" d:DesignWidth="300" Loaded="UserControl_Loaded" DataContextChanged="UserControl_DataContextChanged">
<Grid>
<TextBox x:Name="tb1" HorizontalAlignment="Left" Height="23" Margin="0,0,0,0" TextWrapping="Wrap" Text="{Binding Path=dec_PrixResiduel, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Top" Width="120"/>
</Grid>
</UserControl>
And here is the code behind :
private void UserControl_DataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
// wait binding
if (this.DataContext is IDataItem)
instance = (this.DataContext as IDataItem);
// If this is new incident, set some default properties
if ((bool)instance["$IsNew$"])
//instance["Title"] = "WOW! Now we can set the default value for property!!!";
//instance["Description"] = "And we can use SDK. Current management group: " + mg.Name;
//IncidentTierQueuesEnum.Tier2
//instance["TierQueue"] = mg.EntityTypes.GetEnumeration(new Guid("df3896f5-3145-0546-4d25-e485de6765af"));
instance["dec_PrixAcquisition"] = 1000;
instance["date_Achat"] = DateTime.Now;
instance["dec_Amortissement"] = 3;
//instance["dec_PrixResiduel"] = 0;
//tb1.Text = instance["dec_PrixResiduel"].ToString();
else
//instance["dec_PrixResiduel"] = instance["dec_PrixAcquisition"] ;
Let's say for the moment that I'd like dec_PrixResiduel to be the multiplication of dec_Amortissement and dec_PrixAcquisition (the end formula will be more complex but it'll show me how it works).
Thanks !
Mickael,
My technet galleries contributions :
ConfigMgr driver injector
SCCM Collection splitter
ConfigMgr TS Tools
Customize WinPE images with powershell