string begin

// Determine whether the file existsvar F: string; begin F: = 'C: \ temp \ test.txt '; if not fileexists (f) then begin // if the file does not exist end; end; // Determine whether the folder contains directoryexistsvar dir: string; begin

The message structure consistent with twmmouse is as follows: Detail {left-click} twmlbuttondown {left-click} twmlbuttonup {left-click to raise} twmmbuttondblclk {middle-click} twmmbuttondown {middle-click to press} twmmbuttonup {middle-click to

1. release with the specified owner: // Uses VCL. stdctrls, VCL. extctrls; var panel: tpanel; Procedure tform1.button1click (Sender: tobject); begin panel: = tpanel. create (Self); panel. parent: = self; with tbutton. create (panel) Do //

At the beginning of the programming stage, I was very excited to write a login form step by step, or a form that could add, delete, or modify data table records. However, as programming time and writing projects increase, we will find that such

Unfortunately, the case statement of Delphi does not support strings, but I think this may also be based on efficiency considerations; If you want to use a string in case, it is not an alternative. Five methods are provided here. In this example:

Program project1; {$ apptype console} uses sysutils, unit1 in 'pas \ unit1.pa'; var P: person; begin P: = person. create; // The abstract method can be instantiated, but the warning statement P appears. setname ('delphi author '); p. setage (0); p.

When designing database applications, you often need to extract some information from the program to ensure the portability of the program. The most important information is the database connection parameters. In Delphi, it is very easy to obtain

I have read the source code of inputbox and inputquery functions, and I have some gains and experiences... You can use inputbox to obtain user input strings: Procedure tform1.button1click (Sender: tobject); var STR: string; begin

Delphi reads and writes the INI file instance // -- mainly implements two processes: when the form is closed, the interface information of the file is saved; when the form is created, the program reads the information stored in the file. // -- Uses

String operations in Delphi are very simple, but the background is quite complicated. The traditional string operation method of Pascal is different from that of Windows. Windows adopts the string operation method of C language. The 32-bit Delphi

 Procedure tform3.formcreate (Sender: tobject ); VaR Regi: string; F: textfile; Cipher: tdcp_blockcipher; S: string; Begin Assignfile (F, getsysdir0000'test.txt '); Reset (f ); Readln (F, S ); Closefile (f ); Cipher: = tdcp_blockcipher (dcp_cast2561

All evil Delphi, writing too slow ..... Pascal, The begin .. End I guess! There is no user-friendly design at all. I will go.Day 1 Program project1; {$ apptype console} uses sysutils, unit1 in 'pas \ unit1.pa'; var P: person; begin P: = person.

Let's first give the question and the result, the topic is just seen from the internet, many friends will ask this answer is not there? Wrong, if carefully look at the difference is big, not many said directly into the topic it:That's what we're

Scenario: If the content of the business layer is embedded in the interface layer, we need to separate it. Bad code taste Myframe /***** @ Author wumingkun * @ version 1.0.0 * @ Description */package COM. demo. refactor; import Java.

In string Analysis in Delphi, we have analyzed the basic string types. Next we will talk about string operations. In actual programming, these operations are often used. You don't have to worry about remembering them all at first, as long as you

Class helper may be a new syntax added from Delphi 2007, because it is not very practical and has not been tested until today. After you try it, you will find it interesting! The basic function is to modify an existing class. TXXX =

Leetcode notes: Valid Palindrome, leetcodepalindrome I. Description Ii. problem-solving skills The concept of palindrome originated from a class of numbers in mathematics that have the following characteristics: Set n to any natural number. If you

Unit MyLib; Interface UsesClasses, Printers, DBGrids, Graphics, Sysutils, Windows, Forms, DB, Grids,Dialogs, ComObj, Controls, StdCtrls, ShellAPI; Type // print TdbgridTPrnOut = class (TObject)Procedure PrintHeader (s: string );Procedure PrintFoot

Leetcode Note: Valid Palindrome I. Description Ii. problem-solving skills The concept of palindrome originated from a class of numbers in mathematics that have the following characteristics: Set n to any natural number. If you set the numbers of

Reprinted please keep this article link: http://blog.csdn.net/sushengmiyan/article/details/8545673 {Hardware Author: sushengmiyan 2013.01.26 remarks: function: hardware information retrieval unit Units units} unit applicationhardwareinfo;