ValidationArgs.IsNewItem Property

Gets whether the validate operation processes a new data item.

Namespace: DevExpress.Mvvm.Xpf

Assembly: DevExpress.Mvvm.v23.2.dll

NuGet Packages: DevExpress.Mvvm, DevExpress.Win.Navigation

Declaration

C#

public bool IsNewItem { get; }

VB.NET

Public ReadOnly Property IsNewItem As Boolean

Property Value

Type	Description
Boolean	true if the validate operation processes a new data item; otherwise, false.

Related GitHub Examples

The following code snippets (auto-collected from DevExpress Examples) contain references to the IsNewItem property.

Note

The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.

C#

wpf-data-grid-implement-crud-operations/CS/ViewModel/EFCore/LocalData/MainViewModel.cs#L23

var item = (EFCoreIssues.Issues.User)args.Item;
if(args.IsNewItem)
    _Context.Users.Add(item);

wpf-data-grid-extend-crud-operations/CS/AsyncCRUDOperations/MainViewModel.cs#L21

await Task.Delay(3000);
if(args.IsNewItem) {
    _Context.Users.Add(item);

wpf-data-grid-bind-to-infiniteasyncsource/CS/InfiniteAsyncSourceMVVMSample/IssueServiceViewModel.cs#L81

public void UpdateIssue(RowValidationArgs args) {
    if(args.IsNewItem) {
        args.ResultAsync = AddNewIssueAsync((IssueData)args.Item);

wpf-data-grid-initialize-new-item-row-with-default-values/CS/NewItemRow_MVVM/MainViewModel.cs#L44

public void ValidateRow(RowValidationArgs args) {
    if(args.IsNewItem && string.IsNullOrEmpty(((Product)args.Item).ProductName)) {
        args.Result = new ValidationErrorInfo("Please enter the Product Name.");

VB.NET

wpf-data-grid-implement-crud-operations/VB/ViewModel/EFCore/LocalData/MainViewModel.vb#L21

Dim item = CType(args.Item, Issues.User)
If args.IsNewItem Then _Context.Users.Add(item)
_Context.SaveChanges()

wpf-data-grid-extend-crud-operations/VB/AsyncCRUDOperations/MainViewModel.vb#L29

Await Task.Delay(3000)
If args.IsNewItem Then
    _Context.Users.Add(item)

wpf-data-grid-initialize-new-item-row-with-default-values/VB/NewItemRow_MVVM/MainViewModel.vb#L51

Public Sub ValidateRow(ByVal args As RowValidationArgs)
    If args.IsNewItem AndAlso String.IsNullOrEmpty(CType(args.Item, Product).ProductName) Then
        args.Result = New ValidationErrorInfo("Please enter the Product Name.")