String.StartsWith Method (String)
.NET Framework 3.0
Determines whether the beginning of this instance matches the specified string.
Namespace: System
Assembly: mscorlib (in mscorlib.dll)
Assembly: mscorlib (in mscorlib.dll)
'Declaration Public Function StartsWith ( _ value As String _ ) As Boolean 'Usage Dim instance As String Dim value As String Dim returnValue As Boolean returnValue = instance.StartsWith(value)
public boolean StartsWith ( String value )
public function StartsWith ( value : String ) : boolean
Not applicable.
Parameters
- value
The String to compare.
Return Value
true if value matches the beginning of this string; otherwise, false.This method compares value to the substring at the beginning of this instance that is the same length as value, and returns an indication whether they are equal. To be equal, value must be an empty string (Empty), a reference to this same instance, or match the beginning of this instance.
This method performs a word (case-sensitive and culture-sensitive) comparison using the current culture.
The following code example demonstrates how you can use the StartsWith method.
Imports System Public Class EndsWithTest Public Shared Sub Main() Dim strSource As String() = {"<b>This is bold text</b>", _ "<H1>This is large Text</H1>", _ "<b><i><font color = green>This has multiple tags</font></i></b>", _ "<b>This has <i>embedded</i> tags.</b>", _ "<This line simply begins with a lesser than symbol, it should not be modified"} ' process a string that contains html tags ' this sample does not remove embedded tags (tags in the middle of a line) Console.WriteLine("The following lists the items before the tags have been stripped:") Console.WriteLine("-----------------------------------------------------------------") ' print out the initial array of strings Dim s As String For Each s In strSource Console.WriteLine(s) Next s Console.WriteLine() Console.WriteLine("The following lists the items after the tags have been stripped:") Console.WriteLine("----------------------------------------------------------------") ' print out the array of strings For Each s In strSource Console.WriteLine(StripStartTags(s)) Next s End Sub 'Main Private Shared Function StripStartTags(item As String) As String ' try to find a tag at the start of the line using StartsWith If item.Trim().StartsWith("<") Then ' now search for the closing tag... Dim lastLocation As Integer = item.IndexOf(">") If lastLocation >= 0 Then ' remove the identified section, if it is a valid region item = item.Substring((lastLocation + 1)) End If End If Return item End Function 'StripStartTags End Class 'EndsWithTest
import System.*;
public class EndsWithTest
{
public static void main(String[] args)
{
// process a string that contains html tags
// this sample does not remove embedded tags
// (tags in the middle of a line)
String strSource[] = { "<b>This is bold text</b>",
"<H1>This is large Text</H1>",
"<b><i><font color=green>This has multiple tags</font></i></b>",
"<b>This has <i>embedded</i> tags.</b>",
"<This line simply begins with a lesser than symbol,"
+ " it should not be modified" };
Console.WriteLine("The following lists the items before"
+ " the ends have been stripped:");
Console.WriteLine("-------------------------------------"
+ "----------------------------");
// print out the initial array of strings
for (int iCtr = 0; iCtr < strSource.get_Length(); iCtr++) {
String s = strSource[iCtr];
Console.WriteLine(s);
}
Console.WriteLine();
Console.WriteLine("The following lists the items after"
+ " the ends have been stripped:");
Console.WriteLine("---------------------------------------"
+ "-------------------------");
// print out the array of strings
for (int iCtr = 0; iCtr < strSource.get_Length(); iCtr++) {
String s = strSource[iCtr];
Console.WriteLine(StripStartTags(s));
}
} //main
private static String StripStartTags(String item)
{
// try to find a tag at the start of the line using StartsWith
if (item.Trim().StartsWith("<")) {
// now search for the closing tag...
int lastLocation = item.IndexOf(">");
// remove the identified section, if it is a valid region
if (lastLocation >= 0) {
item = item.Substring(lastLocation + 1);
}
}
return item;
} //StripStartTags
} //EndsWithTest
import System; public class EndsWithTest { public static function Main() : void { // process a string that contains html tags // this sample does not remove embedded tags (tags in the middle of a line) var strSource : String [] = [ "<b>This is bold text</b>", "<H1>This is large Text</H1>", "<b><i><font color=green>This has multiple tags</font></i></b>", "<b>This has <i>embedded</i> tags.</b>", "<This line simply begins with a lesser than symbol, it should not be modified" ]; Console.WriteLine("The following lists the items before the tags have been stripped:"); Console.WriteLine("-----------------------------------------------------------------"); // print out the initial array of strings for( var i : int in strSource ) Console.WriteLine( strSource[i] ); Console.WriteLine(); Console.WriteLine("The following lists the items after the tags have been stripped:"); Console.WriteLine("----------------------------------------------------------------"); // print out the array of strings for ( i in strSource ) Console.WriteLine( StripStartTags( strSource[i] ) ); } private static function StripStartTags( item : String ) : String { // try to find a tag at the start of the line using StartsWith if (item.Trim().StartsWith("<")) { // now search for the closing tag... var lastLocation : int = item.IndexOf( ">" ); // remove the identified section, if it is a valid region if ( lastLocation >= 0 ) item = item.Substring( lastLocation + 1 ); } return item; } } EndsWithTest.Main();
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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