if file exists

Includes the following classes and interfaces: File class FileFilter Interface RandomAccessFile class I. File class Java. io. File is used to indicate the File directory). That is to say, the programmer can use the File class to operate the files

How to use c # To operate ACCESS databases: Microsoft ACCESS is not available at hand, and how to create a database is still simple. first, reference C: ProgramFilesCommonFilesSystemadomsadox. dll, which contains the ADOX namespace; then reference C:

How to back up the Access database in Asp.net ?, Asp. netaccess Public void Create (string mdbPath){If (File. Exists (mdbPath) // check whether the database already Exists{Throw new Exception ("the target database already exists and cannot be

Original article: http://blog.csdn.net/chendazhi/archive/2006/05/09/715542.aspxUpgradeProgramThere are multiple ways to create, the following describes an upgrade program made with Web Services. Upgrading programs through web services is as simple

Loading editor... // Check the file. If the file does not exist, createPrivate void existsfile (string filepath){// If (! File. exists (filepath ))// File. Create (filepath );// The above writing method will report an error. For more information,

/*************************************** **************************************** ***** Function Description: backs up and recovers SQL Server databases.* Author: Liu gongxun;* Version: V0.1 (C #2.0); time:* When using SQL Server, reference the

/*************************************** **************************************** *** * * Function Description: backs up and recovers SQL Server databases. * Author: Liu gongxun; * Version: V0.1 (C #2.0); time: * When using SQL Server, reference the

Five, Shell Process Control1. A heavy BranchIf statement syntax format:If conditionThenCommand1FiThe FI at the end is the if inverted.Write a line:if condition; Then Command1; Fi2. Two branchesIf ELSE syntax format:If

[C #. Net] two methods to determine whether a file is occupied, During the development of the production line Tool today, it is found that log files are frequently occupied. You can browse the Internet to find the simplest code (API or

A static page is generated.The instances written today mainly reflect the steps for replacement and storage.The template will not be done. directly use the whole body as a tag, replace the body of the dynamic page to be made into a static page with

FTP, Email, and "Network neighbors" are commonly used for file data transmission to a certain extent, but they are mainly for "point-to-point" transmission, it is impossible to meet the application requirements of "One space, Resource Interaction".

After receiving a task, there are two machines, one of which is machine A which backs up the database every day. I want another machine B to copy from A to B's directory at regular intervals, A does not share the Database Backup Directory.

Using system;Using system. Collections. Generic;Using system. text;Using system. IO;Using system. directoryservices; Using icsharpcode. sharpziplib. Zip;Using icsharpcode. sharpziplib. gzip;Using icsharpcode. sharpziplib. checksums; Public class

This code is used to import and export datatable files in XML, Excel, and CSV files. Record the code for future use. Be sure to import the Excel file and add a reference to Microsoft. Office. InterOP. Excel 11.0. Default. aspx. CS File Using

File Upload 1. In form, set enctype to "multipart/form-Data ": 2. Determine whether a file has been uploaded:WhenThe user does not select any file to be uploaded. That is, when the text box in the htmlinputfile control is empty, the user clicks the

1. Use the mksdcard command to create a 128 m sd card image named sdcard. IMG (m must be capitalized.Mksdcard 128 M sdcard. img2. Copy sdcard. IMG to D: \ projects2 and set the startup parameters in the run configuration dialog box in

Using System; Using System. Collections. Generic; Using System. ComponentModel; Using System. Data; Using System. Drawing; Using System. Text; Using System. Windows. Forms; Using System. IO; Namespace aaa ...{   Public partial class Form1: Form ...{

Basic tutorial for Android -- 7.6.3 Socket communication based on TCP protocol (2)This section introduces: In the previous section, we introduced some basic concepts and usage of Socket, and then wrote a simple chat room for piggyDemo, I believe

In Internet-based WCF services, security is a very important part. There are many security modes in WCF. This time, we will consider using a limited server environment (such as a virtual host) to configure the message security mode for X509

Using system;Using system. Data;Using system. configuration;Using system. Web;Using system. Web. Security;Using system. IO;Using system. text;Using system. net;Namespace simpledemo{Class Program{/// /// Download Reserved Words/// Public static