/// <summary>
/// Creates a <span> tag with appropriate validation information used by client side AND server side code.<br/>
/// WFUtilities.FieldValidationErrorClass is applied if validation fails on a postback. This is used with an Html.<control>For() element.<br/>
/// The property whose validation state is checked is derived from a strongly-typed lambda.
/// </summary>
/// <param name="ErrorMessage">(Optional) Override any ErrorMessage provided by resources/xml/validators with this property.</param>
/// <param name="expression">An expression that identifies the property whose value will be rendered.<br/>
/// ie: m => m.FirstName will render the 'FirstName' property.</param>
/// <param name="htmlProperties">An anonymous object whose properties are applied to the element.<br/>
/// ie: new { Class = "cssClass", onchange = "jsFunction()" } </param>
/// <returns></returns>
public string ValidationMessageFor <TProperty>(Expression <Func <TModel, TProperty> > expression, string ErrorMessage, object htmlProperties)
{
WFModelMetaProperty metaprop = null;
ModelMetaData mmd = ModelMetaData.FromLambdaExpression(expression, _Model);
HtmlTag span = new HtmlTag("span", new { id = mmd.PropertyName + "_validationMessage", name = mmd.PropertyName + "_validationMessage" });
string lcName = mmd.PropertyName.ToLower();
for (int i = 0; i < _MetaData.Properties.Count; i++)
{
if (_MetaData.Properties[i].MarkupName.ToLower() == lcName)
{
metaprop = _MetaData.Properties[i];
break;
}
}
if (metaprop != null)
{
if (metaprop.HasError)
{
span.MergeObjectProperties(htmlProperties);
span.AddClass(WFUtilities.FieldValidationErrorClass);
if (String.IsNullOrEmpty(ErrorMessage))
{
span.InnerText = metaprop.Errors.FirstOrDefault() ?? "";
}
else
{
span.InnerText = ErrorMessage;
}
return(span.Render());
}
}
span.MergeObjectProperties(htmlProperties);
span.AddClass(WFUtilities.FieldValidationValidClass);
span = PreProcess(span, _MetaData, TagTypes.ValidationMessage,
metaprop != null ? metaprop.MarkupName : mmd.PropertyName,
metaprop != null ? metaprop.PropertyName : mmd.PropertyName,
_Model);
return(span.Render());
}
/// <summary>
/// Creates a <span> tag with appropriate validation information used by client side AND server side code.
/// WFUtilities.FieldValidationErrorClass is applied if validation fails on a postback. This is used with an Html.<control>For() element.
/// </summary>
/// <param name="model">The model itself.</param>
/// <param name="markupName">The markup name of the Html.<control>For() element.</param>
/// <param name="propertyName">Must be the property name on the model object.</param>
/// <param name="ErrorMessage">Override the error message (use with care)</param>
/// <param name="htmlProperties">An anonymous object whose properties are applied to the element.<br/>
/// ie: new { Class = "cssClass", onchange = "jsFunction()" } </param>
/// <returns>Returns a span with WFUtilities.FieldValidationErrorClass or WFUtilities.FieldValidationValidClass as the class.</returns>
public string ValidationMessageFor(object model, string markupName, string propertyName, string ErrorMessage, object htmlProperties)
{
WFModelMetaProperty metaprop = null;
HtmlTag span = new HtmlTag("span", new { id = markupName + "_validationMessage", name = markupName + "_validationMessage" });
string lcName = propertyName.ToLower();
for (int i = 0; i < _MetaData.Properties.Count; i++)
{
//if (_MetaData.Properties[i].ModelObject == model && _MetaData.Properties[i].PropertyName.ToLower() == lcName)
if (_MetaData.Properties[i].MarkupName.ToLower() == lcName)
{
metaprop = _MetaData.Properties[i];
break;
}
}
if (metaprop != null)
{
if (metaprop.HasError)
{
span.MergeObjectProperties(htmlProperties);
span.AddClass(WFUtilities.FieldValidationErrorClass);
if (String.IsNullOrEmpty(ErrorMessage))
{
span.InnerText = metaprop.Errors.FirstOrDefault() ?? "";
}
else
{
span.InnerText = ErrorMessage;
}
return(span.Render());
}
}
span.MergeObjectProperties(htmlProperties);
span.AddClass(WFUtilities.FieldValidationValidClass);
span = PreProcess(span, _MetaData, TagTypes.ValidationMessage, markupName, propertyName, model);
return(span.Render());
}
/// <summary>
/// Returns the raw text of any generated server-side validation error for this property.<br/>
/// This is useful if you want to override the default functionality that generates a <span> tag for validation error messages.
/// </summary>
/// <param name="expression">An expression that identifies the property whose value will be rendered.<br/>
/// ie: m => m.FirstName will render the 'FirstName' property.</param>
/// <returns></returns>
public string TextValidationMessageFor <TProperty>(Expression <Func <TModel, TProperty> > expression)
{
WFModelMetaProperty metaprop = null;
ModelMetaData mmd = ModelMetaData.FromLambdaExpression(expression, _Model);
string lcName = mmd.PropertyName.ToLower();
for (int i = 0; i < _MetaData.Properties.Count; i++)
{
if (_MetaData.Properties[i].MarkupName.ToLower() == lcName)
{
metaprop = _MetaData.Properties[i];
break;
}
}
if (metaprop != null)
{
if (metaprop.HasError)
{
return(metaprop.Errors.FirstOrDefault() ?? "");
}
}
return("");
}
/// <summary>
/// Root TryValidateModel() method. Returns false if any validation errors are found.
/// </summary>
/// <param name="model">A pointer to the current model object</param>
/// <param name="prefix">Optional. A prefix to search and filter values from the value provider.</param>
/// <param name="values">A class implementing IWFValueProvider (examples include WFObjectValueProvider and WFHttpContextValueProvider)</param>
/// <param name="metadata">Optional. Required to collect error data or show error markup on a page. The current WFModelMetaData object.</param>
/// <param name="ruleProvider">A class implementing IWFRuleProvider (examples include WFTypeRuleProvider and WFXmlRuleSetRuleProvider).<br/>
/// This object provides the rules (ie: DataAnnotations) that needed to be validated, and which properties to validate them against.<br/>
/// All other properties are ignored.</param>
/// <returns>Returns false if any validation errors were found.</returns>
public static bool TryValidateModel(object model, string prefix, IWFValueProvider values, WFModelMetaData metadata, IWFRuleProvider ruleProvider)
{
bool validated = true;
//Make sure we have metadata
metadata = metadata == null ? metadata = new WFModelMetaData() : metadata;
metadata.Errors = new List <string>();
//Create a rule provider if one was not provided. WFTypeRuleProvider will handle [MetadataType]
ruleProvider = ruleProvider == null ? new WFTypeRuleProvider(model) : ruleProvider;
validated = validateModelAttributes(model, ruleProvider.GetClassValidationAttributes(), metadata.Errors, ruleProvider.ModelDisplayName);
if (metadata.Errors.Count > 0)
{
validated = false;
}
foreach (PropertyInfo pi in ruleProvider.GetProperties())
{
if (values.ContainsKey(prefix + pi.Name))
{
WFModelMetaProperty metaprop = null;
foreach (ValidationAttribute attr in ruleProvider.GetPropertyValidationAttributes(pi.Name))
{
if (attr as IWFRequireValueProviderContext != null)
{
((IWFRequireValueProviderContext)attr).SetValueProvider(values);
}
string displayName = ruleProvider.GetDisplayNameForProperty(pi.Name);
bool isValid = false;
if (attr.GetType() == typeof(RangeAttribute))
{
try { isValid = attr.IsValid(values.KeyValue(prefix + pi.Name)); } catch (Exception ex) {
if (ex.GetType() == typeof(FormatException))
{
isValid = false;
}
else
{
throw ex;
}
}
}
else
{
isValid = attr.IsValid(values.KeyValue(prefix + pi.Name));
}
if (!isValid)
{
validated = false;
metadata.Errors.Add(attr.FormatErrorMessage(displayName));
if (metaprop == null) // Try to find it ...
{
foreach (WFModelMetaProperty mx in metadata.Properties)
{
if (mx.ModelObject == model && pi.Name.ToLower() == mx.PropertyName.ToLower())
{
metaprop = mx;
break;
}
}
}
if (metaprop == null) // Make a new one ...
{
metaprop = new WFModelMetaProperty();
metaprop.ModelObject = model;
metaprop.PropertyName = pi.Name;
metaprop.DisplayName = displayName;
metaprop.MarkupName = prefix + pi.Name;
metaprop.ValidationAttributes.Add(attr);
metadata.Properties.Add(metaprop);
}
metaprop.HasError = true;
metaprop.Errors.Add(attr.FormatErrorMessage(displayName));
}
}
}
}
return(validated);
}
/// <summary>
/// Find or create a WFModelMetaProperty for the DataAnnotationValidatorControl.
/// The WFModelMetaProperty will be added to the WFModelMetaData object.
/// </summary>
/// <param name="dvc">The DataAnnotationValidatorControl whose property needs to be added to metadata.</param>
/// <param name="metadata">The existing metadata to search through.</param>
/// <returns></returns>
public static WFModelMetaProperty GetMetaPropertyFromValidator(Control rootControl, DataAnnotationValidatorControl dvc,
WFModelMetaData metadata)
{
Type sourceType = dvc.SourceType;
Control controlValidating = WebControlUtilities.FindControlRecursive(rootControl, dvc.ControlToValidate);
WFModelMetaProperty metaproperty = metadata.Properties.FirstOrDefault(m => m.MarkupName == controlValidating.UniqueID);
if (metaproperty == null)
{
metaproperty = new WFModelMetaProperty();
metadata.Properties.Add(metaproperty);
}
metaproperty.PropertyName = dvc.PropertyName;
metaproperty.MarkupName = controlValidating.UniqueID;
if (String.IsNullOrEmpty(dvc.SourceTypeString))
{
if (sourceType == null &&
String.IsNullOrEmpty(dvc.XmlRuleSetName) &&
dvc.Page as IWFGetValidationRulesForPage == null)
{
throw new Exception("The SourceType and SourceTypeString properties are null/empty on one of the validator controls.\r\nPopulate either property.\r\nie: control.SourceType = typeof(Widget); OR in markup SourceTypeString=\"Assembly.Classes.Widget, Assembly\"");
}
else if (sourceType == null && !String.IsNullOrEmpty(dvc.XmlRuleSetName))
{
sourceType = WFUtilities.GetRuleSetForName(dvc.XmlRuleSetName).ModelType;
}
else if (sourceType == null && String.IsNullOrEmpty(dvc.XmlRuleSetName))
{
sourceType = ((IWFGetValidationRulesForPage)dvc.Page).GetValidationClassType();
}
}
else
{
try {
sourceType = Type.GetType(dvc.SourceTypeString, true, true);
} catch (Exception ex) {
throw new Exception("Couldn't resolve type " + dvc.SourceTypeString + ". You may need to specify the fully qualified assembly name.");
}
}
PropertyInfo prop = WFUtilities.GetTargetProperty(dvc.PropertyName, sourceType);
if (String.IsNullOrEmpty(dvc.XmlRuleSetName))
{
foreach (var attr in prop.GetCustomAttributes(typeof(ValidationAttribute), true).OfType <ValidationAttribute>())
{
var displayNameAttr = prop.GetCustomAttributes(typeof(DisplayNameAttribute), true).OfType <DisplayNameAttribute>().FirstOrDefault();
string displayName = displayNameAttr == null ? prop.Name : displayNameAttr.DisplayName;
if (attr as IWFRequireValueProviderContext != null)
{
((IWFRequireValueProviderContext)attr).SetValueProvider(new WFPageControlsValueProvider(dvc.Page, ""));
}
metaproperty.DisplayName = displayName;
metaproperty.ValidationAttributes.Add(attr);
if (!attr.IsValid(GetControlValue(controlValidating)))
{
metaproperty.HasError = true;
if (metaproperty.Errors == null)
{
metaproperty.Errors = new List <string>();
}
metaproperty.Errors.Add(attr.FormatErrorMessage(displayName));
}
}
}
else
{
XmlDataAnnotationsRuleSet ruleset = WFUtilities.GetRuleSetForType(sourceType, dvc.XmlRuleSetName);
metaproperty.DisplayName = dvc.PropertyName;
try {
//It's OK to have a DataAnnotationValidatorControl for a property that has no validation rules
//defined in the XML.
XmlDataAnnotationsRuleSetProperty property = ruleset.Properties.FirstOrDefault(p => p.PropertyName == dvc.PropertyName);
if (property != null)
{
foreach (var validator in property.Validators)
{
ValidationAttribute attr = WFUtilities.GetValidatorInstanceForXmlDataAnnotationsValidator(validator);
if (attr as IWFRequireValueProviderContext != null)
{
((IWFRequireValueProviderContext)attr).SetValueProvider(new WFPageControlsValueProvider(dvc.Page, ""));
}
foreach (var key in validator.ValidatorAttributes.Keys)
{
PropertyInfo pi = attr.GetType().GetProperty(key);
if (pi != null)
{
pi.SetValue(attr, Convert.ChangeType(validator.ValidatorAttributes[key], pi.PropertyType), null);
}
}
metaproperty.ValidationAttributes.Add(attr);
if (!attr.IsValid(GetControlValue(controlValidating)))
{
metaproperty.HasError = true;
if (metaproperty.Errors == null)
{
metaproperty.Errors = new List <string>();
}
metaproperty.Errors.Add(validator.ErrorMessage);
}
}
}
} catch (Exception ex) {
throw new Exception("Error trying to validate " + dvc.PropertyName + ", innerexception may have more details...\r\nMake sure ErrorMessage isn't specified in more than one place.", ex);
}
}
return(metaproperty);
}
