в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:20:22Z

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==Create object inside the using statement==

<source lang="csharp">using System;
using System.IO;

class MainClass {
public static void Main() {

using(StreamReader sr2 = new StreamReader("test.txt")) {
Console.WriteLine(sr2.ReadLine());
sr2.Close();
}

}
}</source>
<pre class=codeResult>124.23</pre>

==Dispose a StreamWriter by using "using"==

<source lang="csharp">using System;
using System.IO;
public sealed class MainClass
{
static void Main(){
using( StreamWriter sw = new StreamWriter("Output.txt") ) {
sw.WriteLine( "This is a test of the emergency dispose mechanism" );
}
}
}</source>

==Nested using statement==

<source lang="csharp">using System;
using System.IO;
class MainClass
{
static void Main()
{
using (TextWriter tw1 = File.CreateText("test.txt"))
{
tw1.WriteLine("test");
using (TextWriter tw2 = File.CreateText("test2.txt"))
tw2.WriteLine("test1");
}
using (TextReader tr = File.OpenText("test.txt"))
{
string str;
while (null != (str = tr.ReadLine()))
Console.WriteLine(str);
using(TextReader tr2 = File.OpenText("test2.txt"))
while(null != (str = tr2.ReadLine()))
Console.WriteLine(str);
}
}
}</source>
<pre class=codeResult>test
test1</pre>

==Use FileStream inside a using statement==

<source lang="csharp">using System;
using System.IO;
using System.Text;
public class MainClass
{
static void Main() {
using( FileStream fs = File.Open( "log.txt", FileMode.Append, FileAccess.Write, FileShare.None ) ) {
Byte[] msg = new UTF8Encoding(true).GetBytes("string \n");
fs.Write( msg, 0, msg.Length );
}
}
}</source>

==Use object inside using statement==

<source lang="csharp">using System;
using System.IO;

class MainClass {
public static void Main() {
StreamReader sr = new StreamReader("test.txt");

using(sr) {
Console.WriteLine(sr.ReadLine());
sr.Close();
}

}
}</source>
<pre class=codeResult>124.23</pre>

==Using statement to deal with multiple resources==

<source lang="csharp">using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
class MainClass
{
static void Main()
{
using (TextWriter tw1 = File.CreateText("test.txt"),
tw2 = File.CreateText("test2.txt"))
{
tw1.WriteLine("test");
tw2.WriteLine("test1");
}
using (TextReader tr1 = File.OpenText("test.txt"),
tr2 = File.OpenText("test2.txt"))
{
string str;
while (null != (str = tr1.ReadLine()))
Console.WriteLine(str);

while (null != (str = tr2.ReadLine()))
Console.WriteLine(str);
}
}
}</source>
<pre class=codeResult>test
test1</pre>

==Using Statement: using DIRECTIVE, not using statement==

<source lang="csharp">using System;
using System.IO; //using DIRECTIVE, not using statement
class MainClass
{
static void Main()
{
using (TextWriter tw = File.CreateText("test.txt"))// using statement
{
tw.WriteLine("string");
}
using (TextReader tr = File.OpenText("test.txt"))
{
string str;
while (null != (str = tr.ReadLine()))
Console.WriteLine(str);
}
}
}</source>
<pre class=codeResult>string</pre>

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в 15:31, 26 мая 2010

Admin: 1 версия