True Identity

recently during some dynamic work in ado.net Entity framework i came across a problem…

suppose here is our class

public class User

{

    #region View Properties

    public long Id { get; set; }

    public String Email { get; set; }

    #endregion

}

now an instance of our class is always persisted in a Store… and at some point say when system updates the value of User we need to run some custom validation rules and if a property doesn’t comply we need to revert its value to older one….

public static class Store

{

    public static string GetPreviousValue(this class classobject,propertyname)

    {

        //Do something

    }

}

but you want to specify something like (don’t confuse i am using Extension Methods here)

userinstance.Email = this.GetPreviousValue(userinstance.Email);

public static string GetPropertyName()

{

PropertyInfo[] properties = this.GetType().GetProperties(BindingFlags.Public | BindingFlags.Instance);

 for (int i = 0; i < properties.Length; i++)

    {

        object propValue = properties[i].GetValue(this, null);

        if (object.ReferenceEquals(propValue,value))     

           {

            return properties[i].Name;

            }

    }

return null;

}

public class TypeOf<T>

    {

        public static string Property<TProp>(Expression<Func<T, TProp>> expression)

        {

            var body = expression.Body as MemberExpression;

            if (body == null) throw new ArgumentException("'expression' should be a member expression");

            return body.Member.Name;

        }

    }

and with this it works like a charm…

var propName = Nameof<SampleClass>.Property(e => e.Email);

userinstance.Email= propName;

• HTML Editor
• Combo Box (behaves like windows Combo)
• Color Picker

This release also includes a good amount of fixes and has decreased the need for script files.

The ASP.NET website has been updated with new videos and tutorials for these controls.

Multi Browser testing is always a hard area for Developers as well as Testers in an effort to address this Microsoft this year at mix announced a new feature in there upcoming version of Microsoft Expression Web (which is now available as beta) called Microsoft SuperPreview.

SuperPreview allows you to compare how your web page will render in different browsers, the good thing about it is it is also available as a stand alone application and free for download from Microsoft.com

The full version of SuperPreview appears in the next release of Microsoft Expression Web and will support IE, Firefox, and Safari. The team is eager to work with other vendors so additional browsers may appear as the product evolves.

i have planned to maintain a list of tools from different sources in order to create a Must Have tools list for me.

this list will have java script related tools, if you guys have any other particular tool in mind do let me know.

Java script Tools

• Script#
• Firebug (Debugger)
• Firebug Lite (Debugger helper library)
• Opera Dragonfly

Java Script Frameworks

• Reflection.js
• typeface.js
• flot

I came across an effort from Microsoft Live labs named “Seadragon Ajax” :), its same as Silverlight deep zoom just fact is that Seadragon is an Ajax based zooming and is available for installation for free or even you can use Microsoft Provide hosted application and can provide the embed code in your site or blog

following is an example