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RSS订阅原创 C#中virtual方法和abstract方法的区别
在C#的学习中，容易混淆virtual方法和abstract方法的使用，现在来讨论一下二者的区别。二者都牵涉到在派生类中与override的配合使用。一、Virtual方法（虚方法） virtual 关键字用于在基类中修饰方法。virtual的使用会有两种情况： 情况1：在基类中定义了virtual方法，但在派生类中没有重写该虚方法。那么在对派生类实例的调用
2013-02-27 10:26:32
239
原创 Singleton
using System;using System.Configuration;using System.Data;using System.Data.SqlClient;using System.Web;using System.Web.Security;using
2011-09-26 10:39:13
260
原创 简单工厂模式
用一个单独的类来创造实例的过程，这就是工厂！using System;using System.Collections.Generic;using System.Text;namespace OperationLibrary{ /// //
2011-09-19 10:01:09
335
原创 FLEX的DataGrid里加CheckBox，支持滚动不乱
<s:CheckBox id="chxBox" selected="{data.selected}" click="outerDocument.click
2011-08-30 10:32:52
912
原创 Flex4 动态取得控件 并更新数据源
private function SetSeleCriteriaFields(temp:ArrayCollection):void{ for(var i:int=0;i<bcSelectionCriteria.numElements;i++) { var
2011-08-26 13:17:47
568
原创 Flex List 选项变灰，信息过长有提示，修复dragComplete事件不准的BUG
// ActionScript filepackage com.invexer.component{ import mx.controls.*; import mx.events.DragEvent; import mx.managers.DragManager; i
2011-08-24 10:32:22
792
原创 Webfocus Flex 之间通讯
package{ import mx.collections.*; import mx.controls.*; import mx.rpc.events.FaultEvent; import mx.rpc.events.ResultEvent; import mx.r
2011-08-24 10:20:50
431
原创 Flex4 动态添加删除组件
private function creatCombox(IdName:String):void{ var comSeleCriteriaTemp:ComboBox=new ComboBox; bcSelectionCriteria.addElement(comSe
2011-08-24 10:15:13
2236
原创 C# WINFORM 内显示QQ验证码
private Bitmap getYZM(string url) { Bitmap bmp = null; HttpWebResponse response = null; try
2011-08-16 10:44:55
639
原创 WEBFOCUS 文件读取
FILEDEF TESTFILE DISK C:/IBI/APPS/PRO1/TEST_01.txtTABLE FILE TESTFILE PRINTFIELD_NAME/A50FIELD_DESC/A40WHERE FIELD_NAME NE ''WHERE FLD EQ 'T'ON TABLE HOLD AS LISTSEND-RUN Example: Displaying Current ddnamesIssuing the command? FILEDEFproduces information s
2010-07-09 22:35:00
460
原创 WEBFOCUS UNION FILE（Concatenate Data Sources）
DEFINE FILE EMPDATA NEWID/A11=EDIT (ID,'999-99-9999'); END DEFINE FILE SALHIST NEWID/A11=EDIT (ID,'999-99-9999'); CSAL/D12.2M=OLDSALARY; END TABLE FILE EMPDATA HEADING "EMPLOYEE SALARIES" " " PRINT CSAL BY NEWID WHERE CSAL GT 65000 MORE FILE SALHIST W
2010-07-09 22:35:00
1202
原创 WEBFOCUS 对TABLE FILE的操作
TABLE FILE CUSTOMER_TESTPRINTFIELD_NAME/A30FIELD_DESC/A30WHERE CUSTOMER_KEY EQ &CUSTKEYON TABLE HOLD AS CUSTUDFSETUP FORMAT ALPHAEND-RUN 读取CUSTOMER_TEST ，PRINT FIELD_NAME 和 FIELD_DESC ，条件是CUSTOMER_KEY 等于PARAMETER (&CUSTKEY)TABLE HOLD为CUSTUPFSETUP FORMAT 成A
2010-07-09 22:34:00
369
原创 WEBFOCUS 寻找和替换字符串
-IF POSIT(&DIVISION2,&DIVISION2.LENGTH,'_',1,'I2') EQ 0 GOTO REP2;-REP1-SET &DIVISION2=STRREP(100,&DIVISION2,1,'_',1,'~',100,&DIVISION2);-SET &DIVISION2=TRUNCATE(&DIVISION2);-GOTO ENDREP;-REP2-IF POSIT(®ION2,®ION2.LENGTH,'_',1,'I2') EQ 0 GOTO REP3;-S
2010-07-09 22:33:00
378
原创 WEBFOCUS TABLE JOIN操作
Example: A Unique Equijoin StructureThe following example illustrates a unique joined structure. Two FOCUS data sources are joined together: an EMPDATA data source and a SALHIST data source. Both data sources are organized by PIN, and they are joined on a
2010-07-09 22:32:00
449
原创 WEBFOCUS FEX调用父页JAVASCRIPT
-HTMLFORM BEGINTEST-HTMLFORM END也可以在form中写SELECT等把FEX的内容带回父页
2010-07-09 22:32:00
359
原创 WebFocus 中直接使用SQL 语句
ENGINE SQLMSS SET DEFAULT_CONNECTION &CONNECTIONSQL SQLMSS PREPARE SQLOUT FORSELECT * from XXX(nolock) where flag='Y' ;ENDTABLE FILE SQLOUTPRINT *ON TABLE HOLD AS TMP_OUT1END-RUN-IF &LINES EQ 0 OR &FOCERRNUM NE 0 OR &RETCODE NE 0 GOTO NOMESSAGE;直接使用SQL语句的写
2010-07-09 22:31:00
491
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