в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:16:19Z

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==Search a character in a string==

<source lang="csharp">using System;

class MainClass {
public static void Main() {
string str = "abcdefghijk";
int idx;

Console.WriteLine("str: " + str);

idx = str.IndexOf("h");
Console.WriteLine("Index of first "h": " + idx);

}
}</source>
<pre class=codeResult>str: abcdefghijk
Index of first "h": 7</pre>

==Search a character in a string: lastindex==

<source lang="csharp">using System;

class MainClass {
public static void Main() {
string str = "abcdefghijk";
int idx;

Console.WriteLine("str: " + str);

idx = str.LastIndexOf("h");
Console.WriteLine("Index of last "h": " + idx);

}
}</source>
<pre class=codeResult>str: abcdefghijk
Index of last "h": 7</pre>

==Search any characters in a string==

<source lang="csharp">using System;

class MainClass {
public static void Main() {
string str = "abcdefghijk";
int idx;

char[] chrs = { "a", "b", "c" };
idx = str.IndexOfAny(chrs);
Console.WriteLine("Index of first "a", "b", or "c": " + idx);
}
}</source>
<pre class=codeResult>Index of first "a", "b", or "c": 0</pre>

==Search a string from the start or from the end==

<source lang="csharp">using System;

class MainClass {
public static void Main() {
string str1 = "ABCDEabcde1234567e890";

// search string
int idx = str1.IndexOf("e");
Console.WriteLine("Index of first occurrence of One: " + idx);
idx = str1.LastIndexOf("e");
Console.WriteLine("Index of last occurrence of One: " + idx);

}
}</source>
<pre class=codeResult>Index of first occurrence of One: 9
Index of last occurrence of One: 17</pre>

==Search a sub string in a string==

<source lang="csharp">using System;

class MainClass {
public static void Main() {
string str = "abcdefghijk";
int idx;

idx = str.IndexOf("def");
Console.WriteLine("Index of first \"def\": " + idx);
}
}</source>
<pre class=codeResult>Index of first "def": 3</pre>

==Search a sub string in a string: lastIndexOf==

<source lang="csharp">using System;

class MainClass {
public static void Main() {
string str = "abcdefghijk";
int idx;

idx = str.LastIndexOf("def");
Console.WriteLine("Index of last \"def\": " + idx);
}
}</source>
<pre class=codeResult>Index of last "def": 3</pre>

==String starts with and ends with==

<source lang="csharp">using System;

class MainClass {
public static void Main() {
string str = "abcdefghijk";
if(str.StartsWith("abc"))
Console.WriteLine("str begins with \"abc\"");

if(str.EndsWith("ijk"))
Console.WriteLine("str ends with \"ijk.\"");
}
}</source>
<pre class=codeResult>str begins with "abc"
str ends with "ijk."</pre>

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