vb net delete file

file. Close () End Try End Sub This example is in D Drive to find a readme.txt document. Assuming we do not have this document set up in the D Drive, we run a Catch statement that pops up the source and cause of the error: watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvdtaxmduzotm1mg==/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/ Dissolve/70/gravity/southeast ">Let's say we're D disk to create a Readm E.txt documentation. Then there will be

Windows API reference for C #, VB. NET and VB6 The Windows API (Application Programming Interface) is the low level workings of windows. it offers high performance, and lightweight code, but it is very sparsely too ented. net programmers. this section provides a rough guide to the Win32 API from a C # and VB.

Const snd_filename as Integer = h20000 Const Snd_alias as Integer = h10000 Const Snd_sync as Integer = h0 There are many more constants, not one list, the following is the example of playing a WAV file Dim mstrfilename as String = "C:\eagle2.wav" PlaySound (mstrfilename, 0, Snd_filename) Note that the above playback is not synchronized, that is, it will not be finished playing. If you write the above code in a Button.Click event handler, i

Similar to Windows, WindowsProgramAnd driver settings are saved in the system registry. The organization of the wince registry is similar to that of the desktop system, including the following four root keys: Hkey_class_root, including file extension information and COM Subsystem Configuration Information HKEY_LOCAL_MACHINE, which contains system, driver, and application configuration information HKEY_CURRENT_USER, which contains the configurati

VB. NET data center charging system-how to write the appearance LayerThe design pattern is detailed on page 103rd of "big talk Design Pattern". It is only the first step for you to read, read, and repeat the examples on the design pattern, next, if we use the design pattern flexibly in our projects and use the design pattern out of the flowers, it would be king. Some people always say that the paper will en

given application environment, create a database and its Application System on the database management system to effectively store data and meet various user needs. In the past and times, everyone has their own ideas about how to design a database. Therefore, there is no difference between database design and good or bad. Proper database design is the best. Go through the test-database system principle, read the video from instructor Yan jianling, and have a little understanding of the database

Next, I will describe the UML diagram in the previous article. Today, let's take a look at the three-tier architecture I learned in VB. NET 1. UML diagram 2, three-layer structure 3, sqlhelper 4, Configuration File 5, interface 6, design mode In fact, the learning of the three-tier structure takes a long time. The reason is not the content of my three-tier arch

hour to solve this problem. Just as I was about to bite my tongue, I suddenly noticed: Q: What is the relationship between the four projects in solution manager? The answer is: they are four different assemblies. They belong to the solution, but they can also be added by other solutions by adding existing projects. (In VB. NET, whether it is a solution, assembly, class, form, it is

1. UML diagram 2, three-tier architecture 3, sqlhelper 4, Configuration File 5, interface 6, design mode Next I wrote a few articles, but the last design pattern was not mentioned. This article has been put on hold for a long time because there are some things that have been busy, so I am really sorry to send this article so late. Next, let's take a look at the last article in the series of. Net In fact,

Data center billing system for VB. NET --- Report A report is a report form. Simply put, a report dynamically displays data in tables, charts, and other formats. It can be expressed: "Report = diverse formats + Dynamic Data ". Before computers do, people use paper and pen to record data. For example, the bean curd account that people often say is to record the bean curd that they sell in a notebook every da

I think everyone has heard of notepad2, notepad ++ and other types of notepad enhancement software. Do you want to write one for yourself? Today we teach you to use VB. NET to write a notebook with enhanced functions (supports full-text word count statistics, selected part of Word Count statistics, supports doc, and rtf formats) First: If it feels good, let's look at the source code: Public class mainfor

Grasp the Stream in VB. NET (2) Flexible and diverse IO OperationSometimes conversion between data and byte arrays is cumbersome. To avoid these boring conversions and simplified code, it is wise to use streamreader/streamwrite and binaryreader/binarywriter. Streamreader and streamwrite are derived from the textreader and textwriter classes respectively, and are automatically converted to Byte encoding. Bi