The file does not exist ( FileNotFoundException). The path is not valid because it is Nothing ( ArgumentNullException). The path is not valid for one of the following reasons: it is a zero-length string, it contains only white space, it contains invalid characters, or it is a device path ( ArgumentException). The following conditions may cause an exception to be thrown: While inputFile.Read(bytes, 0, bufferSize) > 0 ' Adjust array length for VB array declaration. Public Sub CopyBinaryFile(ByVal path As String,ĭim inputFile = IO.File.Open(path, IO.FileMode.Open) ' destination location, then the exception will be thrown to ' encountered opening the file to be copied or writing to the ' This method does not trap for exceptions. The following code example copies a file and allows the caller to specify how much of the file is read into memory per read operation. You can then limit how much of the file is loaded into memory for each read operation. PictureBox1.Image = Image.FromStream(New IO.MemoryStream(bytes))įor large binary files, you can use the Read method of the FileStream object to read from the file only a specified amount at a time. "C:/Documents and Settings/selfportrait.jpg") This example reads from the file C:/Documents and Settings/selfportrait.jpg. Use the ReadAllBytes method, which returns the contents of a file as a byte array. The My.Computer.FileSystem object provides the ReadAllBytes method for reading from binary files.
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