EvalExpression - Revision history

CWI at 13:21, 23 September 2025

2025-09-23T13:21:59Z

CWI at 13:39, 22 September 2025

2025-09-22T13:39:17Z

CWI at 13:33, 18 September 2025

2025-09-18T13:33:52Z

CWI at 10:13, 18 September 2025

2025-09-18T10:13:28Z

REP: #2161 - Added XAML Category

2024-04-04T12:39:42Z

#2161 - Added XAML Category

LGE: /* Examples */

2021-06-22T08:33:24Z

‎Examples

LGE at 11:56, 29 April 2021

2021-04-29T11:56:08Z

LGE: /* Conditional statement */

2021-04-29T11:52:06Z

‎Conditional statement

LGE: /* Conditional statement */

2021-04-29T11:43:48Z

‎Conditional statement

LGE at 13:38, 19 March 2021

2021-03-19T13:38:10Z

← Older revision		Revision as of 13:21, 23 September 2025
Line 171:		Line 171:
	[[Category:WinX\|EvalExpression]]		[[Category:WinX\|EvalExpression]]
	[[Category:XAML\|EvalExpression]]		[[Category:XAML\|EvalExpression]]
−	~~[[Category:Version 5.0\|EvalExpression]]~~

← Older revision		Revision as of 13:39, 22 September 2025
Line 171:		Line 171:
	[[Category:WinX\|EvalExpression]]		[[Category:WinX\|EvalExpression]]
	[[Category:XAML\|EvalExpression]]		[[Category:XAML\|EvalExpression]]
		+	[[Category:Version 5.0\|EvalExpression]]

@@ Line 2: / Line 2: @@
 | title = {{PAGENAME}}
 | name = {{PAGENAME}}
-| namespace = "using:UBIK.WinX.Controls" in UBIK.UWP<br>"clr-namespace:UBIK.CPL.Controls;assembly=UBIK.CPL" in UBIK.Xamarin
+| namespace = "using:UBIK.WinX.Controls" in UBIK.UWP<br>"clr-namespace:UBIK.MAUI.Controls;assembly=UBIK.MAUI" in UBIK.Maui
 | image = [[File:SY_{{PAGENAME}}.png|220px]]
 | imagecaption = imagecaption
 | purpose = Evaluate a C# expression in XAML
-| version = 3.2+ in UBIK.UWP 1.0+ in UBIK.Xamarin
+| version = 3.2+ in UBIK.UWP 1.0+ in UBIK Mobile
 }}
@@ Line 40: / Line 40: @@
 </tab>
-<tab name="Xamarin">
+<tab name="Mobile(Xamarin)">
 <source lang = "xml">
 <StackLayout xmlns:ctrls="clr-namespace:UBIK.CPL.Controls;assembly=UBIK.CPL">
@@ Line 75: / Line 75: @@
 </tab>
-<tab name="Xamarin">
+<tab name="Mobile(Xamarin)">
 The following example shows how to use an expression with two parameters (''Param0'' and ''Param1''). The evaluated ''Result'' is then bound to a Label for output in the UI.
 <source lang = "xml">
@@ Line 110: / Line 110: @@
 </tab>
-<tab name="Xamarin">
+<tab name="Mobile(Xamarin)">
 <source lang = "xml">
 <Grid xmlns:ctrls="clr-namespace:UBIK.CPL.Controls;assembly=UBIK.CPL">
@@ Line 144: / Line 144: @@
 </tab>
-<tab name="Xamarin">
+<tab name="Mobile(Xamarin)">
 <source lang = "xml">
 <Grid xmlns:ctrls="clr-namespace:UBIK.CPL.Controls;assembly=UBIK.CPL">
@@ Line 167: / Line 167: @@
 [[Category:Client|EvalExpression]]
 [[Category:Pages with broken file links|EvalExpression]]
 [[Category:WinX|EvalExpression]]
 [[Category:XAML|EvalExpression]]

@@ Line 169: / Line 169: @@
 [[Category:Pages with broken file links|EvalExpression]]
 [[Category:WinX|EvalExpression]]
 [[Category:XAML|EvalExpression]]

@@ Line 158: / Line 158: @@
 </tabs>
-[[Category:Client|EvalExpression]]
-[[Category:Pages with broken file links|EvalExpression]]
-[[Category:WinX|EvalExpression]]
-[[Category:Xamarin|EvalExpression]]
 ==See also==
@@ Line 170: / Line 170: @@
 [[Category:WinX|EvalExpression]]
 [[Category:Xamarin|EvalExpression]]

@@ Line 19: / Line 19: @@
 {{Hint|When writing expressions in XAML code, you have to avoid (escape) special characters. There are useful [https://www.freeformatter.com/xml-escape.html online tools] for this.}}
 {{Hint|When writing expressions, it's always better (even necessary in some cases) to write them in their full forms. For example, while <nowiki>Bool_A || Bool_B</nowiki> is a valid expression, you should still write <nowiki>Bool_A==true || Bool_B==true</nowiki> instead.}}
 ==== Evaluation without parameters ====
@@ Line 156: / Line 157: @@
 </tab>
 </tabs>
 ==See also==

@@ Line 48: / Line 48: @@
      <Label
          TextColor="#00000"
-         IsVisible="{Binding Path=Result, Source={x:Reference Evaluator}, Converter={StaticResource NullToBoolConverter}}" />
+         IsVisible="{Binding Path=Result, Source={x:Reference Evaluator}, Converter={StaticResource BoolToBool}}" />
 </StackLayout>
 </source>
@@ Line 127: / Line 127: @@
 If / Or statements can also be evaluated using C# syntax.
-In this case, if the result of the "Condi" parameter is true, namely if the context object's MP_STATUS property value equals to 10, P0's value will be displayed in the Label, otherwise P1's value will be displayed.
+In this case, if the result of the "Condi" parameter is true, namely if the context object's MP_STATUS property value equals to 0, P0's value will be displayed in the Label, otherwise P1's value will be displayed.
 <tabs>
@@ Line 134: / Line 134: @@
 <Grid xmlns:ctrls="using:UBIK.WinX.Controls">
      <ctrls:EvalExpression x:Name="Evaluator" Expression="Condi == true ? P0 : P1" Context="{Binding}">
-         <ctrls:EvalExpressionParameter Name="Condi" Value="{Binding Values[MP_STATUS], Converter={StaticResource EqualToTrueConverter}, ConverterParameter=10}" />
+         <ctrls:EvalExpressionParameter Name="Condi" Value="{Binding Values[MP_STATUS], Converter={StaticResource EqualToTrueConverter}, ConverterParameter=0}" />
          <ctrls:EvalExpressionParameter Name="P0" Value="State1" />
          <ctrls:EvalExpressionParameter Name="P1" Value="State2" />
@@ Line 156: / Line 156: @@
 </tab>
 </tabs>
 ==See also==

@@ Line 146: / Line 146: @@
 <source lang = "xml">
 <Grid xmlns:ctrls="clr-namespace:UBIK.CPL.Controls;assembly=UBIK.CPL">
-     <controls:EvalExpression x:Name="Evaluator" Expression="Condi == true ? P0 : P1" Context="{Binding}">
+     <ctrls:EvalExpression x:Name="Evaluator" Expression="Condi == true ? P0 : P1" Context="{Binding}">
-         <controls:EvalExpressionParameter Name="Condi" Value="{Binding Values[MP_STATUS], Converter={StaticResource EqualityToBool}, ConverterParameter=0}" />
+         <ctrls:EvalExpressionParameter Name="Condi" Value="{Binding Values[MP_STATUS], Converter={StaticResource EqualityToBool}, ConverterParameter=0}" />
-         <controls:EvalExpressionParameter Name="P0" Value="State1" />
+         <ctrls:EvalExpressionParameter Name="P0" Value="State1" />
-         <controls:EvalExpressionParameter Name="P1" Value="State2" />
+         <ctrls:EvalExpressionParameter Name="P1" Value="State2" />
-     </controls:EvalExpression>
+     </ctrls:EvalExpression>
      <Label Text="{Binding Path=Result, Source={x:Reference Evaluator}}" />
 </Grid>
@@ Line 156: / Line 156: @@
 </tab>
 </tabs>
 ==See also==

@@ Line 8: / Line 8: @@
 | version = 3.2+ in UBIK.UWP 1.0+ in UBIK.Xamarin
 }}
 == Concept ==
@@ Line 33: / Line 32: @@
      <TextBlock
          Foreground="White"
          Visibility="{Binding ElementName=Evaluator, Path=Result, Converter={StaticResource BoolToVisConverter}}" />
 </StackPanel>
@@ Line 91: / Line 91: @@
 </tab>
 </tabs>
 ==== Setting a calculated property value ====
@@ Line 136: / Line 131: @@
 <source lang = "xml">
 <Grid xmlns:ctrls="using:UBIK.WinX.Controls">
-     <ctrls:EvalExpression x:Name="Evaluator" Expression="P0 == true ? P00 : (P1 == true ? P10)" Context="{Binding}">
+     <ctrls:EvalExpression x:Name="Evaluator" Expression="Condi == true ? P0 : P1" Context="{Binding}">
-         <ctrls:EvalExpressionParameter Name="P0" Value="{Binding Values[MP_PP_STATUS], Converter={StaticResource EqualToVisConverter}, ConverterParameter=10}" />
+         <ctrls:EvalExpressionParameter Name="Condi" Value="{Binding Values[MP_PP_STATUS], Converter={StaticResource EqualToTrueConverter}, ConverterParameter=10}" />
-         <ctrls:EvalExpressionParameter Name="P00" Value="State1" />
+         <ctrls:EvalExpressionParameter Name="P0" Value="State1" />
-         <ctrls:EvalExpressionParameter Name="P1" Value="{Binding Values[MP_PP_STATUS], Converter={StaticResource EqualToVisConverter}, ConverterParameter=20}" />
+         <ctrls:EvalExpressionParameter Name="P1" Value="State2" />
-        <ctrls:EvalExpressionParameter Name="P00" Value="State2" />
      <TextBlock Text="{Binding ElementName=Evaluator, Path=Result}" />
      </ctrls:EvalExpression>
@@ Line 152: / Line 146: @@
 <source lang = "xml">
 <Grid xmlns:ctrls="clr-namespace:UBIK.CPL.Controls;assembly=UBIK.CPL">
-     <controls:EvalExpression x:Name="Evaluator" Expression="P0 == true ? P00 : (P1 == true ? P10)" Context="{Binding}">
+     <controls:EvalExpression x:Name="Evaluator" Expression="Condi == true ? P0 : P1" Context="{Binding}">
-         <controls:EvalExpressionParameter Name="P0" Value="{Binding Values[MP_STATUS], Converter={StaticResource EqualityToBool}, ConverterParameter=0}" />
+         <controls:EvalExpressionParameter Name="Condi" Value="{Binding Values[MP_STATUS], Converter={StaticResource EqualityToBool}, ConverterParameter=0}" />
-         <controls:EvalExpressionParameter Name="P00" Value="State1" />
+         <controls:EvalExpressionParameter Name="P0" Value="State1" />
-         <controls:EvalExpressionParameter Name="P1" Value="{Binding Values[MP_STATUS], Converter={StaticResource EqualityToBool}, ConverterParameter=10}" />
+         <controls:EvalExpressionParameter Name="P1" Value="State2" />
-        <controls:EvalExpressionParameter Name="P10" Value="State2" />
      </controls:EvalExpression>
      <Label Text="{Binding Path=Result, Source={x:Reference Evaluator}}" />
@@ Line 163: / Line 156: @@
 </tab>
 </tabs>
 ==See also==