C#
C#
1 C string str = null string str = “”
(10 )
string str = null , string
str = “” .
dotnet (class) (struct)
(10 )
Class , ,
,Struct , .
3 (delegate)
(10)
namespace test
{
public delegate void OnDBOperate();
public class UserControlBase : System.Windows.Forms.UserControl
{
public event OnDBOperate OnNew;
privatevoidtoolBar_ButtonClick(objectsender,System.Windows.Forms.ToolBarButtonClickEventArgs e)
{
if(e.Button.Equals(BtnNew))
{
// OnDBOperate OnNew
}
}
}
if( OnNew != null )
OnNew( this, e );
4 (10 )
string strTmp = “abcdefg ;
int i= System.Text.Encoding.Default.GetBytes(strTmp).Length;
int j= strTmp.Length;
i= j=
i=13,j=10
5 SQLSERVER table1 ID LastUpdateDate ID
LastUpdateDate SQL (10)
Select ID
FROM table1
Where LastUpdateDate = (Select MAX(LastUpdateDate) FROM table1)
6 test i>10 ?
(10 )
public void test(int i)
{
2014-03-20 06:30:02 ( 255 )
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2005
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