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1. READ AND WRITE INI FILE VB NET HOW TO
2. READ AND WRITE INI FILE VB NET CODE
3. READ AND WRITE INI FILE VB NET WINDOWS

For more information, see ACL Technology Overview.

READ AND WRITE INI FILE VB NET CODE

For more information, see Code Access Security Basics.

If you are running in a partial-trust context, the code might throw an exception due to insufficient privileges. To read from a file, your assembly requires a privilege level granted by the FileIOPermission class. The contents of the file may not be what is expected, and methods to read from the file may fail.NET Framework Security Verify all inputs before using the data in your application. Public Sub ReadTextFileByLine(ByVal psFileName As String) Dim hFile As Integer Dim sLine As String Current line read from the file Dim iLineCt As Integer Line counter Debug.Print '- ReadTextFileByLine() ' hFile FreeFile Open psFileName For Input Access Read As hFile Debug. For example, the file Form1.vb may not be a Visual Basic source file. The file that is read must be a text file.ĭo not make decisions about the contents of the file based on the name of the file. MsgBox("The first line of the file is " & stringReader) This example opens the file named testfile.txt, reads a line from it, and displays the line in a message box.

Create a new project and go Projects Add Module to add a new module.

READ AND WRITE INI FILE VB NET HOW TO

The following code shows how to read and write to an INI file.

READ AND WRITE INI FILE VB NET WINDOWS

Use the OpenTextFileReader method to open the TextReader, specifying the file. INI files use the following structure: SectionName KeyName1 KeyValue KeyName2 KeyValue For an example of an INI files, look at the Win.ini file stored in your windows directory. To read a line from a file with a text reader These methods, OpenTextFileWriter and OpenTextFileReader, are advanced methods that do not appear in IntelliSense unless you select the All tab. storageFolder =Īwait storageFolder.GetFileAsync("sample.The My.Computer.FileSystem object provides methods to open a TextReader and a TextWriter. The common first step for each of the ways of reading from a file is to get the file with StorageFolder.GetFileAsync. Here's how to read from a file on disk using the StorageFile class. await dataWriter.StoreAsync() įor additional details and best practice guidance, see Best practices for writing to files. Lastly, add this code (if you're using C#, within the inner using statement) to save the text to your file with DataWriter.StoreAsync and close the stream with IOutputStream.FlushAsync. Windows::Storage::Streams::DataWriter dataWriter ĭataWriter.WriteString(L"DataWriter has methods to write to various types, such as DataTimeOffset.") ĭataWriter^ dataWriter = ref new DataWriter(outputStream) ĭataWriter->WriteString("DataWriter has methods to write to various types, such as DataTimeOffset.") ĭim dataWriter As New DataWriter(outputStream)ĭataWriter.WriteString("DataWriter has methods to write to various types, such as DataTimeOffset.") using (var dataWriter = new (outputStream))ĭataWriter.WriteString("DataWriter has methods to write to various types, such as DataTimeOffset.") Reading and writing to simple text files is. Now add this code (if you're using C#, within the existing using statement) to write to the output stream by creating a new DataWriter object and calling the DataWriter.WriteString method. The files for this tip are in the Ch7 Read and Write Files folder. ' We'll add more code here in the next step. Using outputStream = stream.GetOutputStreamAt(0) IOutputStream^ outputStream = stream->GetOutputStreamAt(0) Windows::Storage::StorageFolder storageFolder Create a sample file replace if exists. Windows::Foundation::IAsyncAction ExampleCoroutineAsync() LocalFolder Īwait storageFolder.CreateFileAsync("sample.txt", Here's how to create a file in the app's local folder. You can learn how to get a file by using a file picker in Open files and folders with a picker. Know how to get the file that you want to read from, write to, or both To learn how to write asynchronous apps in C++/CX, see Asynchronous programming in C++/CX. To learn how to write asynchronous apps in C++/WinRT, see Concurrency and asynchronous operations with C++/WinRT. You can learn how to write asynchronous apps in C# or Visual Basic, see Call asynchronous APIs in C# or Visual Basic. Understand async programming for Universal Windows Platform (UWP) apps For a complete sample, see the File access sample.