March 17th:C#,Debug,HTML

C#

    1. How .NET Regular Expressions Really Work

    2. How to Change System Date Programmatically With C#

    3. Regular Expressions in C#- Practical Usage

    This post touches on four major expression subjects:

    1) String Comparison - does a string contain a particular sub-string?

    a. finding valid HTML tags- RegEx.Matches return MactchCollection

    valid html tags: Regex HTMLTag = new Regex(@"(<\/?[^>]+>)");

    2) Splitting a string into segments(分割,部分)- we will take an IPv4 address and retrieve its dotted components

    a. splitting decimal Tcp/IP address looks like xxx.xxx.xxx.xxx with x being a decimal number

    Regex tcpIp = new Regex(@"(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})");

    3) String Replacement

    4) Substitution Patterns

    5) Stricter input validation- how to harden your expressions

    4. 10 C# Shorthands that improve productivity-c# tips

    1) The ? conditional evaluation operator

    example:int max = (x > y) ? x : y;

    2) Null-Coalesce(合并，联合) operator(??)

    example:obejct e = ( c != null ) ? c : d; => object e = c ?? d;

    3) Object Initializers

    Customer c = new Customer{ Name="James",Address="204 Lime Street"};(c# 3.0)

    4) The using statement

    5) Aliases(别名) for long winded namespaces and types

    example: using Word = Microsoft.Office.Interop.Word;

                     Word.Application = new Word.Application(){ Visible = true};

    6) Nullable objects

    example: Nullable x = null;

     int? x =  null;

    7) Automatic Properties(c# 3.0)

    8) Type inference(c#3.0 var)

    note: There is no performance impact results form using type inference.The compiler does all the work figuring out the data type at compile time.

    9) Lambda Expressions

    10) string.IsNullOrEmpty

    Optional and named parameters in C# 4.0

    Example:app.Document.open(ref filename,ref missing.......);

    app.Documents.open(@"c:\Document.docx",Readonly:true);

    5. Back to Basics: C# Anonymous types

    1) what is an anonymous type?

      One important motivation(动机)for this was to make code written with LINQ easier to read.Anonymous types simply mean that you don't specify the type- but let the complier do it instead.

    2) what is the beneficial for Anonymous type?

    a. simple definitions,simplified

    b. using anonymous types for creating arrays

    c. Saving time and code with anonymous types

    d. Combining Lambda expressions with Queries

    3) other questions?

    a. Is var typesafe? yes

    b. Is there a performance penalty(处罚,征罚) for using "var"? no

    c. On using anonymous definitions in large projects

    6. Safely Cleaning HTML with strip_tags in C#

    7. Back to Basics:Reflection

Debugger

    1. .NET Framework Library Source Code now available

    2. Configurin Visual Studio to Debug .NET Framework Source Code

    1) Install the Visual Studio 2008 QFE( Quick-Fix-Engineering)

    2) Start Visual Studio 2008 and bring up Tools > Options > Debugging > General

      Turn OFF the "Enable Just My Code" setting

      Turn ON the "Enable Source Server Support" setting

    3) Next,bring up the "Symbols" page and set the symbols download URL and a cache location.

      Set the symbol file location to be:http://referencesource.microsoft.com/symbols

Sliverlight

    1. XAML Power Toys Add in- Extract Properties To Style

Other

    1. Email Reporter:VSTS 2008 Load Test Plug-in