/// <summary> /// Gets a string that indicates the status of the specified field as a CSS class. This will include /// some combination of "modified", "valid", or "invalid", depending on the status of the field. /// </summary> /// <param name="editContext">The <see cref="EditContext"/>.</param> /// <param name="accessor">An identifier for the field.</param> /// <returns>A string that indicates the status of the field.</returns> public static string FieldCssClass <TField>(this EditContext editContext, Expression <Func <TField> > accessor) => FieldCssClass(editContext, FieldIdentifier.Create(accessor));
public void CanUseEmptyFieldName()
{
var fieldIdentifier = new FieldIdentifier(new object(), string.Empty);
Assert.Equal(string.Empty, fieldIdentifier.FieldName);
}
public FieldState(FieldIdentifier fieldIdentifier)
{
_fieldIdentifier = fieldIdentifier;
}
/// <summary> /// Gets the validation messages within this <see cref="ValidationMessageStore"/> for the specified field. /// /// To get the validation messages across all validation message stores, use <see cref="EditContext.GetValidationMessages(FieldIdentifier)"/> instead /// </summary> /// <param name="accessor">The identifier for the field.</param> /// <returns>The validation messages for the specified field within this <see cref="ValidationMessageStore"/>.</returns> public IEnumerable <string> this[Expression <Func <object> > accessor] => this[FieldIdentifier.Create(accessor)];
/// <summary> /// Removes all messages within this <see cref="ValidationMessageStore"/> for the specified field. /// </summary> /// <param name="accessor">Identifies the field for which to remove the messages.</param> public void Clear(Expression <Func <object> > accessor) => Clear(FieldIdentifier.Create(accessor));
/// <summary> /// Adds the messages from the specified collection for the specified field. /// </summary> /// <param name="accessor">Identifies the field for which to add the messages.</param> /// <param name="messages">The validation messages to be added.</param> public void Add(Expression <Func <object> > accessor, IEnumerable <string> messages) => Add(FieldIdentifier.Create(accessor), messages);
/// <summary> /// Gets the validation messages within this <see cref="ValidationMessageStore"/> for the specified field. /// /// To get the validation messages across all validation message stores, use <see cref="EditContext.GetValidationMessages(FieldIdentifier)"/> instead /// </summary> /// <param name="fieldIdentifier">The identifier for the field.</param> /// <returns>The validation messages for the specified field within this <see cref="ValidationMessageStore"/>.</returns> public IEnumerable <string> this[FieldIdentifier fieldIdentifier] => _messages.TryGetValue(fieldIdentifier, out var messages) ? messages : Array.Empty <string>();
/// <summary> /// Determines whether the specified fields in this <see cref="EditContext"/> has been modified. /// </summary> /// <param name="editContext">The <see cref="EditContext"/>.</param> /// <param name="accessor">Identifies the field whose current validation messages should be returned.</param> /// <returns>True if the field has been modified; otherwise false.</returns> public static bool IsModified(this EditContext editContext, Expression <Func <object> > accessor) => editContext.IsModified(FieldIdentifier.Create(accessor));
/// <summary> /// Adds a validation message for the specified field. /// </summary> /// <param name="accessor">Identifies the field for which to add the message.</param> /// <param name="message">The validation message.</param> public void Add(Expression <Func <object> > accessor, string message) => Add(FieldIdentifier.Create(accessor), message);
/// <summary> /// Gets the current validation messages for the specified field. /// /// This method does not perform validation itself. It only returns messages determined by previous validation actions. /// </summary> /// <param name="editContext">The <see cref="EditContext"/>.</param> /// <param name="accessor">Identifies the field whose current validation messages should be returned.</param> /// <returns>The current validation messages for the specified field.</returns> public static IEnumerable <string> GetValidationMessages(this EditContext editContext, Expression <Func <object> > accessor) => editContext.GetValidationMessages(FieldIdentifier.Create(accessor));
/// <summary>
/// Attempts to validate a single field or property of a form model or child object model.
/// </summary>
/// <param name="validator"></param>
/// <param name="editContext"></param>
/// <param name="fieldIdentifier"></param>
/// <returns></returns>
private async Task <ValidationResult> TryValidateField(IValidator validator, EditContext editContext, FieldIdentifier fieldIdentifier)
{
try
{
var vselector = new MemberNameValidatorSelector(new[] { fieldIdentifier.FieldName });
var vctx = CreateValidationContext(fieldIdentifier.Model, validatorSelector: vselector);
return(await validator.ValidateAsync(vctx));
}
catch (Exception ex)
{
var msg = $"An unhandled exception occurred when validating field name: '{fieldIdentifier.FieldName}'";
if (editContext.Model != fieldIdentifier.Model)
{
msg += $" of a child object of type: {fieldIdentifier.Model.GetType()}";
}
msg += $" of <EditForm> model type: '{editContext.Model.GetType()}'";
throw new UnhandledValidationException(msg, ex);
}
}
/// <summary> /// Removes all messages within this <see cref="ValidationMessageStore"/> for the specified field. /// </summary> /// <param name="store">The <see cref="ValidationMessageStore"/>.</param> /// <param name="accessor">Identifies the field for which to remove the messages.</param> public static void Clear(this ValidationMessageStore store, Expression <Func <object> > accessor) => store.Clear(FieldIdentifier.Create(accessor));
/// <summary> /// Adds the messages from the specified collection for the specified field. /// </summary> /// <param name="store">The <see cref="ValidationMessageStore"/>.</param> /// <param name="accessor">Identifies the field for which to add the messages.</param> /// <param name="messages">The validation messages to be added.</param> public static void AddRange(this ValidationMessageStore store, Expression <Func <object> > accessor, IEnumerable <string> messages) => store.AddRange(FieldIdentifier.Create(accessor), messages);
/// <summary> /// Adds a validation message for the specified field. /// </summary> /// <param name="store">The <see cref="ValidationMessageStore"/>.</param> /// <param name="accessor">Identifies the field for which to add the message.</param> /// <param name="message">The validation message.</param> public static void Add(this ValidationMessageStore store, Expression <Func <object> > accessor, string message) => store.Add(FieldIdentifier.Create(accessor), message);