In order to detect whether your application is executing in a designer you can either use the
GetIsInDesignMode
method of
DesignerProperties
,
or the Dependency Property metadata directly like so:
C#:
bool designTime = (bool)DesignerProperties.IsInDesignModeProperty.GetMetadata(
typeof(DependencyObject)).DefaultValue
VB.NET:
dim designTime as Boolean = CBool(DesignerProperties.IsInDesignModeProperty.GetMetadata( _
GetType(DependencyObject)).DefaultValue
This can be then rolled into a static class like so:
C#:
public static class DesignTimeEnvironment
{
static bool? designTime;
public static bool DesignTime
{
get
{
if (!designTime.HasValue)
{
designTime = (bool)DesignerProperties.IsInDesignModeProperty.GetMetadata(
typeof(DependencyObject)).DefaultValue;
}
return designTime.Value;
}
}
}
VB.NET:
Public Class DesignTimeEnvironment
Public Shared ReadOnly Property DesignTime As Boolean
Get
If Not DesignTimeEnvironment.designTime.HasValue Then
DesignTimeEnvironment.designTime = New Boolean?(CBool( _
DesignerProperties.IsInDesignModeProperty.GetMetadata( _
GetType(DependencyObject)).DefaultValue))
End If
Return DesignTimeEnvironment.designTime.Value
End Get
End Property
Private Shared designTime As Boolean?
End Class
Daniel is a former senior engineer in Technology and Research at the Office of the CTO at Microsoft, working on next generation systems.
Previously Daniel was a nine-time Microsoft MVP and co-founder of
Outcoder, a Swiss software and consulting company.
Daniel is the author of Windows Phone 8 Unleashed and Windows Phone 7.5 Unleashed, both published by SAMS.
Daniel is the developer behind several acclaimed mobile apps including
Surfy Browser for Android and Windows Phone. Daniel is the creator of a number of popular open-source projects, most notably
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