ValidationErrorCollection Class

Holds a collection of ValidationError objects.

System.Object
  System.Collections.ObjectModel.Collection<ValidationError>
    System.Workflow.ComponentModel.Compiler.ValidationErrorCollection

Namespace:  System.Workflow.ComponentModel.Compiler
Assembly:  System.Workflow.ComponentModel (in System.Workflow.ComponentModel.dll)

[SerializableAttribute]
public sealed class ValidationErrorCollection : Collection<ValidationError>

The ValidationErrorCollection type exposes the following members.

  NameDescription
Public methodValidationErrorCollection()Initializes a new instance of the ValidationErrorCollection class.
Public methodValidationErrorCollection(IEnumerable<ValidationError>)Initializes a new instance of the ValidationErrorCollection class from an IEnumerable collection of type ValidationError
Public methodValidationErrorCollection(ValidationErrorCollection)Initializes a new instance of the ValidationErrorCollection class by using a ValidationErrorCollection.
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  NameDescription
Public propertyCountGets the number of elements actually contained in the Collection<T>. (Inherited from Collection<T>.)
Public propertyHasErrorsIndicates whether the collection contains ValidationError objects that indicate compilation errors.
Public propertyHasWarningsThis property indicates whether the ValidationErrorCollection contains at least one ValidationError object, which indicates a compilation warning.
Public propertyItemGets or sets the element at the specified index. (Inherited from Collection<T>.)
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  NameDescription
Public methodAddAdds an object to the end of the Collection<T>. (Inherited from Collection<T>.)
Public methodAddRangeCopies the collection of enumerable elements to the end of the collection.
Public methodClearRemoves all elements from the Collection<T>. (Inherited from Collection<T>.)
Public methodContainsDetermines whether an element is in the Collection<T>. (Inherited from Collection<T>.)
Public methodCopyToCopies the entire Collection<T> to a compatible one-dimensional Array, starting at the specified index of the target array. (Inherited from Collection<T>.)
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Public methodGetEnumeratorReturns an enumerator that iterates through the Collection<T>. (Inherited from Collection<T>.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Public methodIndexOfSearches for the specified object and returns the zero-based index of the first occurrence within the entire Collection<T>. (Inherited from Collection<T>.)
Public methodInsertInserts an element into the Collection<T> at the specified index. (Inherited from Collection<T>.)
Public methodRemoveRemoves the first occurrence of a specific object from the Collection<T>. (Inherited from Collection<T>.)
Public methodRemoveAtRemoves the element at the specified index of the Collection<T>. (Inherited from Collection<T>.)
Public methodToArrayReturns a new instance of an array that contains all ValidationError objects that are contained in this collection.
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
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  NameDescription
Explicit interface implemetationPrivate methodICollection.CopyToCopies the elements of the ICollection to an Array, starting at a particular Array index. (Inherited from Collection<T>.)
Explicit interface implemetationPrivate propertyICollection<T>.IsReadOnlyGets a value indicating whether the ICollection<T> is read-only. (Inherited from Collection<T>.)
Explicit interface implemetationPrivate propertyICollection.IsSynchronizedGets a value indicating whether access to the ICollection is synchronized (thread safe). (Inherited from Collection<T>.)
Explicit interface implemetationPrivate propertyICollection.SyncRootGets an object that can be used to synchronize access to the ICollection. (Inherited from Collection<T>.)
Explicit interface implemetationPrivate methodIEnumerable.GetEnumeratorReturns an enumerator that iterates through a collection. (Inherited from Collection<T>.)
Explicit interface implemetationPrivate methodIList.AddAdds an item to the IList. (Inherited from Collection<T>.)
Explicit interface implemetationPrivate methodIList.ContainsDetermines whether the IList contains a specific value. (Inherited from Collection<T>.)
Explicit interface implemetationPrivate methodIList.IndexOfDetermines the index of a specific item in the IList. (Inherited from Collection<T>.)
Explicit interface implemetationPrivate methodIList.InsertInserts an item into the IList at the specified index. (Inherited from Collection<T>.)
Explicit interface implemetationPrivate propertyIList.IsFixedSizeGets a value indicating whether the IList has a fixed size. (Inherited from Collection<T>.)
Explicit interface implemetationPrivate propertyIList.IsReadOnlyGets a value indicating whether the IList is read-only. (Inherited from Collection<T>.)
Explicit interface implemetationPrivate propertyIList.ItemGets or sets the element at the specified index. (Inherited from Collection<T>.)
Explicit interface implemetationPrivate methodIList.RemoveRemoves the first occurrence of a specific object from the IList. (Inherited from Collection<T>.)
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NoteNote

This material discusses types and namespaces that are obsolete. For more information, see Deprecated Types in Windows Workflow Foundation 4.5.

The following example shows how to create and manipulate validation errors and a validation error collection as part of a custom validation routine.

This code example is part of the Send E-mail SDK sample and is from the SendEMailActivity.cs file. For more information, see Send Mail Activity.

private void ValidateEmailProperties(ValidationErrorCollection validationErrors, SendEmailActivity activity)
{
    // Validate the To property 
    if (String.IsNullOrEmpty(activity.To))
    {
        validationErrors.Add(ValidationError.GetNotSetValidationError(SendEmailActivity.ToProperty.Name));

    }
    else if (!activity.To.Contains("@"))
    {
        validationErrors.Add(new ValidationError("Invalid To e-mail address", InvalidToAddress, false, SendEmailActivity.ToProperty.Name));

    }

    // Validate the From property 
    if (String.IsNullOrEmpty(activity.From))
    {
        validationErrors.Add(ValidationError.GetNotSetValidationError(SendEmailActivity.FromProperty.Name));
    }
    else if (!activity.From.Contains("@"))
    {
        validationErrors.Add(new ValidationError("Invalid From e-mail address", InvalidFromAddress, false, SendEmailActivity.FromProperty.Name));

    }
}

.NET Framework

Supported in: 4.5.3, 4, 3.5, 3.0

Windows 8.1, Windows Server 2012 R2, 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.

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.
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