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namespace System.Web.ModelBinding {
using System;
using System.Globalization;
// Provides configuration settings common to the new model binding system.
public static class ModelBinderErrorMessageProviders {
private static ModelBinderErrorMessageProvider _typeConversionErrorMessageProvider;
private static ModelBinderErrorMessageProvider _valueRequiredErrorMessageProvider;
public static ModelBinderErrorMessageProvider TypeConversionErrorMessageProvider {
get {
if (_typeConversionErrorMessageProvider == null) {
_typeConversionErrorMessageProvider = DefaultTypeConversionErrorMessageProvider;
}
return _typeConversionErrorMessageProvider;
}
set {
_typeConversionErrorMessageProvider = value;
}
}
public static ModelBinderErrorMessageProvider ValueRequiredErrorMessageProvider {
get {
if (_valueRequiredErrorMessageProvider == null) {
_valueRequiredErrorMessageProvider = DefaultValueRequiredErrorMessageProvider;
}
return _valueRequiredErrorMessageProvider;
}
set {
_valueRequiredErrorMessageProvider = value;
}
}
private static string DefaultTypeConversionErrorMessageProvider(ModelBindingExecutionContext modelBindingExecutionContext, ModelMetadata modelMetadata, object incomingValue) {
return GetResourceCommon(modelBindingExecutionContext, modelMetadata, incomingValue, GetValueInvalidResource);
}
private static string DefaultValueRequiredErrorMessageProvider(ModelBindingExecutionContext modelBindingExecutionContext, ModelMetadata modelMetadata, object incomingValue) {
return GetResourceCommon(modelBindingExecutionContext, modelMetadata, incomingValue, GetValueRequiredResource);
}
private static string GetResourceCommon(ModelBindingExecutionContext modelBindingExecutionContext, ModelMetadata modelMetadata, object incomingValue, Func<ModelBindingExecutionContext, string> resourceAccessor) {
string displayName = modelMetadata.GetDisplayName();
string errorMessageTemplate = resourceAccessor(modelBindingExecutionContext);
string errorMessage = String.Format(CultureInfo.CurrentCulture, errorMessageTemplate, incomingValue, displayName);
return errorMessage;
}
private static string GetUserResourceString(ModelBindingExecutionContext modelBindingExecutionContext, string resourceName) {
#if UNDEF
return GetUserResourceString(modelBindingExecutionContext, resourceName, DefaultModelBinder.ResourceClassKey);
#endif
return GetUserResourceString(modelBindingExecutionContext, resourceName, String.Empty);
}
// If the user specified a ResourceClassKey try to load the resource they specified.
// If the class key is invalid, an exception will be thrown.
// If the class key is valid but the resource is not found, it returns null, in which
// case it will fall back to the MVC default error message.
internal static string GetUserResourceString(ModelBindingExecutionContext modelBindingExecutionContext, string resourceName, string resourceClassKey) {
return (!String.IsNullOrEmpty(resourceClassKey) && (modelBindingExecutionContext != null) && (modelBindingExecutionContext.HttpContext != null))
? modelBindingExecutionContext.HttpContext.GetGlobalResourceObject(resourceClassKey, resourceName, CultureInfo.CurrentUICulture) as string
: null;
}
private static string GetValueInvalidResource(ModelBindingExecutionContext modelBindingExecutionContext) {
return GetUserResourceString(modelBindingExecutionContext, "PropertyValueInvalid") ?? SR.GetString(SR.ModelBinderConfig_ValueInvalid);
}
private static string GetValueRequiredResource(ModelBindingExecutionContext modelBindingExecutionContext) {
return GetUserResourceString(modelBindingExecutionContext, "PropertyValueRequired") ?? SR.GetString(SR.ModelBinderConfig_ValueRequired);
}
}
}
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