Many ADO.NET classes, including DataSet, DataTable, and DataColumn, use the ExtendedProperties property to enable users to add custom information. Think of the ExtendedProperties property as a kind of generic cargo

If you use VB6 to write COM programs that raise errors, it seems impossible to continue after hitting one of them. However, the (almost undocumented) commands ALT+F8 and ALT+F5 let

Use this function to generate random strings that abide by certain criteria. It Related Posts Verizon Quietly Closes Its Cloud Computing ServiceThe Fundamentals of Windows LoggingGoogle launches free dark web

You can change database passwords from within VB to control more of your application Related Posts How to Disable Auto-commit Mode in Spring BootDisappointing story on memory optimizationSecurity and Speakers

Many VB projects need a database connection string. But there Related Posts Scientist Tool Helps Rewrite Ruby CodeClimate change threatens coastal property valuesMeta Quest 3S VR headset price leakedHow to

IF statements can become quite long when you’re testing for multiple values. Using the IN expression can make them more readable.So, instead of typing: IF (@testvar = 1 or @testvar

Always use an enum instead of defines and always close the list with an additional count. This makes life simpler and helps the compiler.Instead of defines: #define TypeA 0#define TypeB

All you need is a simple class that asks your object for each known interface. Here’s the class QI: #include #include #include class QI : public std::stringstream, protected CRegKey{protected: virtual

Suppose you need to make multiple inserts (or updates or deletes) to a SQL Server database?for instance, inserting items in a shopping cart. In the past, you needed to loop

Instead of writing a string class that contains a (char *), why not write a string class with a fixed char array? Of course, it would be repetitive if you

Consider this code: class CA{//…};class CB{//…};CA * CB2CA(CB *pb){ return dynamic_cast(pb);} The CA and CB are totally unrelated classes and the CB2CA function seems to be completely useless. However, what

A sparse array saves memory by not allocating memory for elements that are not initialized or to which you don’t need access. They’re quite easy using the STL map.This example

Use the following code: #include void main(){ char name[15]; double salary; ofstream outFile(“FileName.txt”, ios::in); while (outFile){ outFile >> name >> salary; }} Related Posts Google Cloud Databases Now Generally AvailableSchedule

How to print out a Currency in Java is an often overlooked topic. How should Currency be printed out in an international, standardized way?The java.text.NumberFormat class is used for outputting

This wrapper class “FileCopier” copies data from one file to another. This class uses another class: “StreamCopier”. /** * Class: FileCopier * Author: Vivek Bagade * Date: 8/31/2001 * Description:

While it may seem logical to store a result in a variable just to use it as an argument to some function, sometimes it may be better to pass the

This is useful in a Web-based Photo Gallery kind of application, where you need to automatically generate multiple sizes of the same image. class ThumbnailGenerator { public void generateThumbnail (String

If you have a method into which you pass a String parameter that you compare with another string then: void foo( String str ){ String CONST_STR = “bar”; // DON’T

To create a file that your IE browser will recognize as XML, simply place these two lines at the top of your ASP page. IE will view it as an

A field gains focus when the user clicks inside the text box, and the focus is lost when the user clicks outside the box, anywhere on the page. You can

At one time or another, all ASP progrmmers have used RESPONSE.WRITE to write out a variable on the screen, ensuring that the variable is passing correctly or has the correct

This tip is useful for large, server-side scripts containing lots of functions/procedures that generate HTML forms. Say you’ve hardcoded the script name (for the same script) in the ACTION tag

Servlet 2.3 provides an API that finds the algorithm used a Web app’s SSL requests. The attribute “javax.servlet.request.cipher_suite” is provided to get the information.Here’s the code: String cipherAttribute = “javax.servlet.request.cipher_suite”;String

/** * Function that will remove the leading and trailing spaces. */function trim(str){ return( rtrim(ltrim(str)));}/** * Function that will remove the trailing spaces. */function rtrim(str){ re = /(s+)$/; return str.replace(re,

The DataReader is the ADO.NET counterpart of the forward-only, read-only recordset in classic ADO. For this reason you never know how many rows the DataReader is about to return. In

‘ create and return a DataAdapter over an open SqlConnection’ and initialize its delete, insert, and update commands” CN is the SqlConnection object’ SQL is the SQL Select statement to

‘ create and return a DataAdapter over an open OleDbConnection’ and initialize its delete, insert, and update commands” CN is the OleDbConnection object’ SQL is the SQL Select statement to