C#编程和Visual Studio使用技巧（下）

<CODE> 
public static bool HasRows(this DataTable dataTable) 
  { 
return dataTable.IsNull() ? false : (dataTable.Rows.Count > 0); 
  } 
 
 public static bool IsNull(this object o) 
  { 
   return (o == null); 
  } 
 
 To use: 
 If(dataTable.HasRows()) 
 { 
 … 
 } 
  </CODE> 

<CODE> 
public static string ToTitleCase(this string inputString) 
  { 
   return Thread.CurrentThread.CurrentCulture.TextInfo. 
ToTitleCase((inputString ?? string.Empty).ToLower()); 
 } 
  </CODE> 

<CODE> 
 
 INTERFACE 
 public interface IMyInterface 
 { 
 void MyMethod(string myString); 
 } 
 
 CLASS THAT IMPLEMENTS THE INTERFACE IMPLICITLY 
 public MyImplicitClass: IMyInterface 
 { 
 public void MyMethod(string myString) 
 { 
 /// 
 } 
 } 
 
 CLASS THAT IMPLEMENTS THE INTERFACE EXPLICITLY 
 public MyExplicitClass: IMyInterface 
 { 
 void IMyInterface.MyMethod(string myString) 
 { 
 /// 
 } 
 } 
 
 MyImplicitClass instance would work with either the class or the Interface: 
 MyImplicitClass myObject = new MyImplicitClass(); 
 myObject.MyMethod(""); 
 IMyInterface myObject = new MyImplicitClass(); 
 myObject.MyMethod(""); 
 
 MyExplicitClass would work only with the interface: 
 //The following line would not work. 
 MyExplicitClass myObject = new MyExplicitClass(); 
 myObject.MyMethod(""); 
 //This will work 
 IMyInterface myObject = new MyExplicitClass(); 
 myObject.MyMethod(""); 
 
 </CODE> 

<CODE> 
 private double _total; 
 public double Total 
 { 
 get { return _total; } 
 set { _total = value; } 
 } 
 </CODE> 

<CODE> 
public double Total { get; set; } 
 </CODE> 

<connectionStrings configSource="configs\ development.config" /> 

<CODE> 
string delimitedString = "String.Split || RegEx.Split"); 
string[] ouputString = System.Text.RegularExpressions.Regex.Split( 
 delimitedString, 
 , System.Text.RegularExpressions.Regex.Escape("||")); 
 </CODE>