ValidationErrorCollection Class

Definition

Namespace:: System.Workflow.ComponentModel.Compiler

Assembly:: System.Workflow.ComponentModel.dll

Holds a collection of ValidationError objects.

public ref class ValidationErrorCollection sealed : System::Collections::ObjectModel::Collection<System::Workflow::ComponentModel::Compiler::ValidationError ^>

[System.Serializable]
public sealed class ValidationErrorCollection : System.Collections.ObjectModel.Collection<System.Workflow.ComponentModel.Compiler.ValidationError>

type ValidationErrorCollection = class
    inherit Collection<ValidationError>

Public NotInheritable Class ValidationErrorCollection
Inherits Collection(Of ValidationError)

Inheritance: Object

Collection<T>
ValidationErrorCollection

Attributes: SerializableAttribute

Examples

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 Email 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 email 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 email address", InvalidFromAddress, false, SendEmailActivity.FromProperty.Name));

    }
}

Private Sub ValidateEmailProperties(ByVal validationErrors As ValidationErrorCollection, ByVal activity As SendEmailActivity)
    'Validate the To property
    If String.IsNullOrEmpty(activity.EmailTo) Then
        Dim validationError As ValidationError = System.Workflow.ComponentModel.Compiler.ValidationError.GetNotSetValidationError(SendEmailActivity.ToProperty.Name)
        validationErrors.Add(validationError)
    ElseIf Not activity.EmailTo.Contains("@") Then
        Dim validationError As New ValidationError("Invalid To email address", _
          InvalidToAddress, False, SendEmailActivity.ToProperty.Name)
        validationErrors.Add(validationError)
    End If

    ' Validate the From property
    If String.IsNullOrEmpty(activity.FromEmail) Then
        validationErrors.Add(ValidationError.GetNotSetValidationError(SendEmailActivity.FromEmailProperty.Name))
    ElseIf Not activity.FromEmail.Contains("@") Then
        Dim validationError As New ValidationError("Invalid From email address", _
            InvalidFromAddress, False, SendEmailActivity.FromEmailProperty.Name)
        validationErrors.Add(validationError)
    End If
End Sub

Remarks

Note

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

Constructors

ValidationErrorCollection()	Initializes a new instance of the ValidationErrorCollection class.
ValidationErrorCollection(IEnumerable<ValidationError>)	Initializes a new instance of the ValidationErrorCollection class from an IEnumerable collection of type ValidationError
ValidationErrorCollection(ValidationErrorCollection)	Initializes a new instance of the ValidationErrorCollection class by using a ValidationErrorCollection.

Properties

Count	Gets the number of elements actually contained in the Collection<T>. (Inherited from Collection<T>)
HasErrors	Indicates whether the collection contains ValidationError objects that indicate compilation errors.
HasWarnings	This property indicates whether the ValidationErrorCollection contains at least one ValidationError object, which indicates a compilation warning.
Item[Int32]	Gets or sets the element at the specified index. (Inherited from Collection<T>)
Items	Gets a IList<T> wrapper around the Collection<T>. (Inherited from Collection<T>)

Methods

Add(T)	Adds an object to the end of the Collection<T>. (Inherited from Collection<T>)
AddRange(IEnumerable<ValidationError>)	Copies the collection of enumerable elements to the end of the collection.
Clear()	Removes all elements from the Collection<T>. (Inherited from Collection<T>)
ClearItems()	Removes all elements from the Collection<T>. (Inherited from Collection<T>)
Contains(T)	Determines whether an element is in the Collection<T>. (Inherited from Collection<T>)
CopyTo(T[], Int32)	Copies the entire Collection<T> to a compatible one-dimensional Array, starting at the specified index of the target array. (Inherited from Collection<T>)
Equals(Object)	Determines whether the specified object is equal to the current object. (Inherited from Object)
GetEnumerator()	Returns an enumerator that iterates through the Collection<T>. (Inherited from Collection<T>)
GetHashCode()	Serves as the default hash function. (Inherited from Object)
GetType()	Gets the Type of the current instance. (Inherited from Object)
IndexOf(T)	Searches for the specified object and returns the zero-based index of the first occurrence within the entire Collection<T>. (Inherited from Collection<T>)
Insert(Int32, T)	Inserts an element into the Collection<T> at the specified index. (Inherited from Collection<T>)
InsertItem(Int32, T)	Inserts an element into the Collection<T> at the specified index. (Inherited from Collection<T>)
MemberwiseClone()	Creates a shallow copy of the current Object. (Inherited from Object)
Remove(T)	Removes the first occurrence of a specific object from the Collection<T>. (Inherited from Collection<T>)
RemoveAt(Int32)	Removes the element at the specified index of the Collection<T>. (Inherited from Collection<T>)
RemoveItem(Int32)	Removes the element at the specified index of the Collection<T>. (Inherited from Collection<T>)
SetItem(Int32, T)	Replaces the element at the specified index. (Inherited from Collection<T>)
ToArray()	Returns a new instance of an array that contains all ValidationError objects that are contained in this collection.
ToString()	Returns a string that represents the current object. (Inherited from Object)

Explicit Interface Implementations

ICollection.CopyTo(Array, Int32)	Copies the elements of the ICollection to an Array, starting at a particular Array index. (Inherited from Collection<T>)
ICollection.IsSynchronized	Gets a value indicating whether access to the ICollection is synchronized (thread safe). (Inherited from Collection<T>)
ICollection.SyncRoot	Gets an object that can be used to synchronize access to the ICollection. (Inherited from Collection<T>)
ICollection<T>.IsReadOnly	Gets a value indicating whether the ICollection<T> is read-only. (Inherited from Collection<T>)
IEnumerable.GetEnumerator()	Returns an enumerator that iterates through a collection. (Inherited from Collection<T>)
IList.Add(Object)	Adds an item to the IList. (Inherited from Collection<T>)
IList.Contains(Object)	Determines whether the IList contains a specific value. (Inherited from Collection<T>)
IList.IndexOf(Object)	Determines the index of a specific item in the IList. (Inherited from Collection<T>)
IList.Insert(Int32, Object)	Inserts an item into the IList at the specified index. (Inherited from Collection<T>)
IList.IsFixedSize	Gets a value indicating whether the IList has a fixed size. (Inherited from Collection<T>)
IList.IsReadOnly	Gets a value indicating whether the IList is read-only. (Inherited from Collection<T>)
IList.Item[Int32]	Gets or sets the element at the specified index. (Inherited from Collection<T>)
IList.Remove(Object)	Removes the first occurrence of a specific object from the IList. (Inherited from Collection<T>)

Extension Methods

CopyToDataTable<T>(IEnumerable<T>)	Returns a DataTable that contains copies of the DataRow objects, given an input IEnumerable<T> object where the generic parameter `T` is DataRow.
CopyToDataTable<T>(IEnumerable<T>, DataTable, LoadOption)	Copies DataRow objects to the specified DataTable, given an input IEnumerable<T> object where the generic parameter `T` is DataRow.
CopyToDataTable<T>(IEnumerable<T>, DataTable, LoadOption, FillErrorEventHandler)	Copies DataRow objects to the specified DataTable, given an input IEnumerable<T> object where the generic parameter `T` is DataRow.
Cast<TResult>(IEnumerable)	Casts the elements of an IEnumerable to the specified type.
OfType<TResult>(IEnumerable)	Filters the elements of an IEnumerable based on a specified type.
AsParallel(IEnumerable)	Enables parallelization of a query.
AsQueryable(IEnumerable)	Converts an IEnumerable to an IQueryable.
Ancestors<T>(IEnumerable<T>)	Returns a collection of elements that contains the ancestors of every node in the source collection.
Ancestors<T>(IEnumerable<T>, XName)	Returns a filtered collection of elements that contains the ancestors of every node in the source collection. Only elements that have a matching XName are included in the collection.
DescendantNodes<T>(IEnumerable<T>)	Returns a collection of the descendant nodes of every document and element in the source collection.
Descendants<T>(IEnumerable<T>)	Returns a collection of elements that contains the descendant elements of every element and document in the source collection.
Descendants<T>(IEnumerable<T>, XName)	Returns a filtered collection of elements that contains the descendant elements of every element and document in the source collection. Only elements that have a matching XName are included in the collection.
Elements<T>(IEnumerable<T>)	Returns a collection of the child elements of every element and document in the source collection.
Elements<T>(IEnumerable<T>, XName)	Returns a filtered collection of the child elements of every element and document in the source collection. Only elements that have a matching XName are included in the collection.
InDocumentOrder<T>(IEnumerable<T>)	Returns a collection of nodes that contains all nodes in the source collection, sorted in document order.
Nodes<T>(IEnumerable<T>)	Returns a collection of the child nodes of every document and element in the source collection.
Remove<T>(IEnumerable<T>)	Removes every node in the source collection from its parent node.