Object Oriented Programming - File Input & Output

Object Oriented Programming - File Input & Output

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  Q3M1 – OOPC# Dudy Fathan Ali S.Kom File Input & Output 1 Q3M1 Dudy Fathan Ali, S.Kom (DFA) 2015 CEP - CCIT Fakultas Teknik Universitas Indonesia
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom o The stream is a sequence of bytes travelling from a source to a destination over a communication path. o The two basic streams used are the input and output streams. o Input stream is used for a read operation. o Output stream is used for performing a write operation. o The System.IO namespace includes various classes, which are used to perform operations, such as file creation, file deletion, and the read-write operations to files.
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Common Class of System.IO Namespace The following table describes some commonly used classes in the System.IO namespace.
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom FileStream Class Most file Input/Output (I/O) support in the .NET Framework is implemented in the System.IO namespace. You can use the FileStream class in the System.IO namespace to read from, to write, and to close files. FileStream [ObjName] = new FileStream([FileName], [FileMode], [FileAccess]) Code Structure: FileStream fs = new FileStream(“MyFile.txt”, FileMode.Open, FileAccess.Read); Example:
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom StreamReader and StreamWriter Class The Stream class is used to read from and to write data in the text files. If data of a file is only text, then you can use the StreamReader class and the StreamWriter class to accomplish the reading and writing tasks StreamReader sr = new StreamReader([ObjFileStream]) Code Structure: FileStream fs = new FileStream(“MyFile.txt”, FileMode.Open, FileAccess.Read); StreamReader sr = new StreamReader(fs); Example:
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Process of input data with FileStream and StreamWriter File Input.txt FileStream StreamWriter Write Data to Stream Mengosongkan memori Pembacaan data bisa dari input user atau dari cara yang lain Data di simpan ke dalam file Input.txt Buka StreamWriter Buka FileStream Read Data From User Close SW & FS Tutup StreamWriter dan FileStream Flush
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Process of input data with FileStream and StreamWriter Consider the following code:
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Latihan Mandiri Diketahui nama dosen sebagai berikut : Masukkan lah nama-nama tersebut kedalam satu file dengan nama datadosen.txt dengan menggunakan FileStream. Catatan: Nama dosen harus dimasukkan berdasarkan inputan user (bukan nilai statis dari variable) Dudy Fathan Ali S.Kom Fachran Nazarullah S.Kom Tri Agus Riyadi S.Kom Riza Muhammad Nurman S.Kom Musawarman S.Kom
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Process of reading data with FileStream and StreamReader File Output.txt FileStream Tampilkan Data Next Data Y N Close SR Close FS Tutup StreamReader Tutup FileStream (b) Buka StreamReader (a) Buka FileStream (a)  Membuka File (b)  Memuat Isi File ke dalam object sr != null StreamReader
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Process of reading data with FileStream and StreamWriter Consider the following code:
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Process of search data with FileStream and StreamReader File Output.txt FileStream StreamReader sr != null Y N Close SR Close FS Tutup StreamReader Tutup FileStream Buka StreamReader Buka FileReader Data Search Data yang di cari Variabel dataUntuk menampung hasil pencarian data Hasil cari simpan ke variabel data Y a Cetak data Apakah text yang di cari ada, Jika iya maka akan di simpan ke variabel data Untuk pengecekan, anda bisa menggunakan Contains aNext Data Y
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Process of search data with FileStream and StreamWriter
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Latihan Mandiri Anda ditugaskan untuk mencari nama lengkap dari orang yang bernama “Fachran” dari file datadosen.txt yang berisi data sebagai berikut : Tampilkan data yang dicari sehingga menghasilkan output sebagai berikut : Catatan : Parameter pencarian harus dari inputan user (bukan nilai statis dari variable) Data yang dicari : Fachran Nazarullah S.Kom Dudy Fathan Ali S.Kom Fachran Nazarullah S.Kom Tri Agus Riyadi S.Kom Riza Muhammad Nurman S.Kom Musawarman S.Kom
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Delimiter o Delimiter = Pemisah o Simbol bisa digunakan untuk delimiter (#, $, &, ~) o Implementasinya menggunakan array
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Delimiter o Penggunaan Delimiter : o Contoh input data pelanggan: o ID Pelanggan : 8934 o Nama Pelanggan : Joni Simanjuntak o Jenis Kelamin : Pria o Alamat : Jakarta 8934#Joni Simanjuntak#Pria#Jakarta 8934;Joni Simanjuntak;Pria;Jakarta Memiliki delimiter dengan simbol ‘#’ Memiliki delimiter dengan simbol ‘;’
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Mengapa harus menggunakan delimiter? Berikut data pelanggan --------------------------------- ID Pelanggan : 8934 Nama Pelanggan : Joni Simanjuntak Jenis Kelamin : Pria Alamat : Jakarta Terkadang developer membutuhkan tampilan seperti ini: Dengan menggunakan delimiter, developer dapat lebih mudah memecah data yang satu dengan yang lain. 8934#Joni Simanjuntak#Pria#Jakarta array[0] = 8394 array[1] = Joni Simanjuntak array[2] = Pria array[3] = Jakarta
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Process of input data with delimiter format. Consider the following code:
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  File Input &Output Q3M1 – OOP C# Dudy Fathan Ali S.Kom Process of reading data with delimiter format. Consider the following code:
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  Q3M1 – OOPC# Dudy Fathan Ali S.Kom Thank You! Dudy Fathan Ali S.Kom dudy.fathan@eng.ui.ac.id