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DependencyProperty.IsValidType Method

.NET Framework 4.5

Determines whether a specified value is acceptable for this dependency property's type, as checked against the property type provided in the original dependency property registration.

Namespace: System.Windows
Assembly: WindowsBase (in WindowsBase.dll)

Syntax

C++

public bool IsValidType(
	Object value
)

Parameters

value: Type: System.Object
The value to check.

Return Value

Type: System.Boolean
true if the specified value is the registered property type or an acceptable derived type; otherwise, false.

Remarks

A value of null is a valid type for reference type dependency properties, or for a Nullable<T> dependency property, and would return true for these cases. In cases where the dependency property is neither a reference nor a Nullable<T> type, IsValidType will return false for a null value rather than raise an exception.

Examples

The following example uses IsValidType as a check before calling SetValue on the dependency property.

void TrySetValue(DependencyObject target, DependencyProperty dp, object providedValue) {
  if (dp.IsValidType(providedValue))
  {
    target.SetValue(dp, providedValue);
  }
}

Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

DependencyProperty Class

System.Windows Namespace

Other Resources

Custom Dependency Properties

Dependency Properties Overview

Dependency Property Metadata

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