Tag Archives: read
Illustrate the use of ExecuteReader method in C#
The ExecuteReader() method executes commands that return rows, such as a SQL SELECT statement. The returned rows are located in an OdbcDataReader, an OleDbDataReader, a SqlDataReader, or an OracleDataReader, depending on which Data Provider you are using. string cmdString = … Continue reading
Reading from Filehandles in Perl
open (FILE, "/tmp/file") or die("Cannot open file: $!"); while (<FILE>) { chomp; print "The line just read was: $_\n"; }
Working with Comma-Separated Values in C# .NET
The example uses comma-separated values, loading them into a List object. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace CommaValues { class Program { private static List<Dictionary<string, string>> GetData( out List<string> columns) { string line; string[] … Continue reading
Reading Data from an Input Stream in C# .NET
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace StreamRead { class Program { static void Main(string[] args) { string line; try { FileStream aFile = new FileStream("Log.txt", FileMode.Open); StreamReader sr = new StreamReader(aFile); line = … Continue reading
Reading Data from Random Access Files
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace ReadFile { class Program { static void Main(string[] args) { byte[] byData = new byte[200]; char[] charData = new Char[200]; try { FileStream aFile = new FileStream("sometext.txt", … Continue reading
ERROR 1099 (HY000): Table ‘TABLENAME′ was locked with a READ lock and can’t be up dated
This error occurs when you try to insert data into a table that has been locked for reading only. Lock table: mysql> LOCK TABLES TABLEproducts READ; Query OK, 0 rows affected (0.00 sec) Trying to insert into TABLEproducts creates the … Continue reading
Read assembly attributes in csharp
To get the attributes for an assembly we can call the GetCustomAttributes() method on the Assembly class. The GetCustomAttribute takes a boolean value as parameter which indicates whether to get inherited attributes; the GetCustomAttribute class implements the ICustomAttributeProvider interface. The … Continue reading
ReflectionOnlyLoad and ReflectionOnlyLoadFrom in ASP.NET
The ReflectionOnlyLoad and ReflectionOnlyLoadFrom methods are built into ASP.NET 2.0 to load assemblies only to interrogate/read information in the assembly. We cannot execute the code in the assembly or create new instances of the assembly when assemblies are loaded using … Continue reading
Loop through an array and read values in Javascript
To loop through all entries of an array and read their values, we can use a for loop to build an incrementing index counter, limited by the length of the array. Example: var myArray = ["Mani", "Kaka", "Biryani", "Mad"]; for … Continue reading
Read file up to 1024 bytes of data in csharp
Stream stream = File.OpenRead(@"C:\data\file.xml"); int bytesToRead = 1024; int bytesRead = 0; byte [ ] buffer = new byte [bytesToRead]; // Fill up the buffer repeatedly until we reach the end of file do { bytesRead = stream.Read(buffer, 0, … Continue reading
Read complete POST data in PHP
If a developer wants to read the complete body of a post request and not just the parsed data that PHP puts in the super global array $_POST, we can use the php://input stream. This can be used to to … Continue reading
Reading data from a Isolated Storage in C#
The IsolatedStorageFileStream class in c-sharp is used to deal with reading data from Assembly/Machine-User level store created by calling the GetMachineStoreForAssembly method on an instance object of the IsolatedStorageFile class. The IsolatedStorageFileStream class inherits from the FileStream and hence methods … Continue reading
Open a file in php for reading
The fopen($fileName, “r”) function allows developers to open a file and read its content. The function returns a file handle. The second argument “r” instructs PHP to open the file for reading. Once the file is open, other functions to … Continue reading
Read a file into a string using PHP
An entire file can be read into a single string using the file_get_contents() php function. The file function reads all the lines of a file and returns them in a single string. Example code on how to file_get_contents(): <?php $file … Continue reading
Opening a directory in php for reading with opendir()
The opendir() function helps read the contents of a directory by obtaining a directory resource. This function requires a string representing the path to the directory to be opened. opendir() returns a directory handle resource on success, or FALSE on … Continue reading
