public static MvcHtmlString EnumDisplayFor <TModel, TValue>(this HtmlHelper <TModel> html, Expression <Func <TModel, TValue> > expression)
{
var propertyInfo = MemberExpressionHelper.GetPropertyInfo(expression);
Type enumType = null;
if (propertyInfo.PropertyType.IsEnum)
{
enumType = propertyInfo.PropertyType;
}
else
{
var attributes = propertyInfo.GetCustomAttributes(typeof(EnumDataTypeAttribute), true);
if (attributes == null || attributes.Length == 0)
{
throw new Exception("cannot resolve enum type");
}
enumType = (attributes[0] as EnumDataTypeAttribute).EnumType;
if (enumType == null)
{
throw new Exception("cannot resolve enum type");
}
}
var model = (html.ViewContext.View as WebViewPage).Model;
var modelValue = propertyInfo.GetValue(model, null);
if (modelValue == null)
{
return(new MvcHtmlString(""));
}
return(new MvcHtmlString(EnumHelper.GetText((int)modelValue, enumType)));
}
public void GetMemberTypeTest()
{
var memberHelper = new MemberExpressionHelper();
Expression <Func <User, bool> > expression = user => user.IsActive == true;
Assert.AreEqual(typeof(bool), memberHelper.GetMemberType(expression.Body.MaybeAs <BinaryExpression>().Bind(c => c.Left).GetOrDefault(null)));
expression = user => user.IsActive;
var t = expression.Body.MaybeAs <MemberExpression>().GetOrDefault(null);
Assert.AreEqual(typeof(bool), memberHelper.GetMemberType(t));
}
private string ReplaceParameters(string msg)
{
var getters = MemberExpressionHelper.GetMembersFunctions <T>(_waitCondition);
foreach (var getter in getters)
{
var value = getter.Getter(ActuallyValue);
var pattern = getter.Key;
var target = $"{pattern}({GetValuePattern(value)})";
Regex regex = new(pattern);
var result = regex.Replace(msg, target);
msg = result;
}
return(msg);
}
public void GetMemberNameTest()
{
var memberHelper = new MemberExpressionHelper();
Expression <Func <User, bool> > expression = user => user.IsActive == true;
Assert.AreEqual("IsActive", memberHelper.GetMemberName(expression.Body.MaybeAs <BinaryExpression>().Bind(c => c.Left).GetOrDefault(null)));
expression = user => user.IsActive;
Assert.AreEqual("IsActive", memberHelper.GetMemberName(expression.Body.MaybeAs <MemberExpression>().GetOrDefault(null)));
expression = user => user.IsActive.Equals(true);
Assert.AreEqual("IsActive", memberHelper.GetMemberName(expression.Body.MaybeAs <MethodCallExpression>().Bind(c => c.Object).GetOrDefault(null)));
expression = user => user.Credentials.Password == "123";
Assert.AreEqual("Password", memberHelper.GetMemberName(expression.Body.MaybeAs <BinaryExpression>().Bind(c => c.Left).GetOrDefault(null)));
expression = user => user.Credentials != null;
Assert.AreEqual("Credentials", memberHelper.GetMemberName(expression.Body.MaybeAs <BinaryExpression>().Bind(c => c.Left).GetOrDefault(null)));
}
