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The ValidateAsync and ValidatePropertyAsync methods return whether validation passed

This commit is contained in:
Antony Male 2014-05-03 10:00:11 +01:00
parent ef01444611
commit 5f3ae76824
1 changed files with 11 additions and 6 deletions
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17
Stylet/ValidatingModelBase.cs
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@ -63,10 +63,10 @@ namespace Stylet
/// <summary>
/// Validate all properties. If you override this, you MUST fire ErrorsChanged as appropriate, and call ValidationStateChanged
/// </summary>
protected virtual async Task ValidateAsync()
protected virtual async Task<bool> ValidateAsync()
{
if (this.validator == null)
return;
throw new InvalidOperationException("Can't run validation if a validator hasn't been set");
var handler = this.ErrorsChanged;
bool anyChanged = false;
@ -87,13 +87,16 @@ namespace Stylet
if (anyChanged)
this.OnValidationStateChanged();
return !this.HasErrors;
}
/// <summary>
/// Call ValidateProperty, deriving the name of the property in a type-safe manner
/// </summary>
/// <param name="property">Expression describing the property to validate</param>
protected virtual Task ValidatePropertyAsync<TProperty>(Expression<Func<TProperty>> property)
/// <returns>True if the property validates successfully</returns>
protected virtual Task<bool> ValidatePropertyAsync<TProperty>(Expression<Func<TProperty>> property)
{
return this.ValidatePropertyAsync(property.NameForProperty());
}
@ -102,10 +105,11 @@ namespace Stylet
/// Validate a single property, by name. If you override this, you MUST fire ErrorsChange and call OnValidationStateChanged() if appropriate
/// </summary>
/// <param name="propertyName">Property to validate</param>
protected virtual async Task ValidatePropertyAsync([CallerMemberName] string propertyName = null)
/// <returns>True if the property validated successfully</returns>
protected virtual async Task<bool> ValidatePropertyAsync([CallerMemberName] string propertyName = null)
{
if (this.validator == null)
return;
throw new InvalidOperationException("Can't run validation if a validator hasn't been set");
if (!this.propertyErrors.ContainsKey(propertyName))
this.propertyErrors.Add(propertyName, null);
@ -120,6 +124,7 @@ namespace Stylet
handler(this, new DataErrorsChangedEventArgs(propertyName));
this.OnValidationStateChanged();
}
return newErrors == null || newErrors.Length == 0;
}
protected override async void OnPropertyChanged(string propertyName)
@ -128,7 +133,7 @@ namespace Stylet
// Save ourselves a little bit of work every time HasErrors is fired as the result of
// the validation results changing.
if (this.autoValidate && propertyName != "HasErrors")
if (this.validator != null && this.autoValidate && propertyName != "HasErrors")
await this.ValidatePropertyAsync(propertyName);
}