remove string.copy examples (#41994)
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Genevieve Warren
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@ -92,7 +92,7 @@ In .NET, a <xref:System.String> object can include embedded null characters, whi
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- The value returned by the `strlen` or `wcslen` functions does not necessarily equal <xref:System.String.Length%2A?displayProperty=nameWithType>.
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- The string created by the `strcpy_s` or `wcscpy_s` functions is not necessarily identical to the string created by the <xref:System.String.Copy%2A?displayProperty=nameWithType> method.
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- The string created by the `strcpy_s` or `wcscpy_s` functions is not necessarily identical to the string being copied.
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You should ensure that native C and C++ code that instantiates <xref:System.String> objects, and code that is passed <xref:System.String> objects through platform invoke, don't assume that an embedded null character marks the end of the string.
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@ -450,7 +450,6 @@ For detailed information about formatting operations and examples, see the <xref
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You can call the following <xref:System.String> methods to make a copy of a string:
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- <xref:System.String.Clone%2A> returns a reference to an existing <xref:System.String> object.
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- <xref:System.String.Copy%2A> creates a copy of an existing string.
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- <xref:System.String.CopyTo%2A> copies a portion of a string to a character array.
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### Normalize a string
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@ -2,47 +2,47 @@
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description: "Learn more about: Types of String Manipulation Methods in Visual Basic"
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title: "Types of String Manipulation Methods"
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ms.date: 07/20/2015
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helpviewer_keywords:
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helpviewer_keywords:
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- "strings [Visual Basic], manipulating [Visual Basic]"
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- "string manipulation"
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ms.assetid: 905055cd-7f50-48fb-9eed-b0995af1dc1f
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---
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# Types of String Manipulation Methods in Visual Basic
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There are several different ways to analyze and manipulate your strings. Some of the methods are a part of the Visual Basic language, and others are inherent in the `String` class.
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## Visual Basic Language and the .NET Framework
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There are several different ways to analyze and manipulate your strings. Some of the methods are a part of the Visual Basic language, and others are inherent in the `String` class.
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Visual Basic methods are used as inherent functions of the language. They may be used without qualification in your code. The following example shows typical use of a Visual Basic string-manipulation command:
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[!code-vb[VbVbalrStrings#44](~/samples/snippets/visualbasic/VS_Snippets_VBCSharp/VbVbalrStrings/VB/Class2.vb#44)]
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In this example, the `Mid` function performs a direct operation on `aString` and assigns the value to `bString`.
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For a list of Visual Basic string manipulation methods, see [String Manipulation Summary](../../../language-reference/keywords/string-manipulation-summary.md).
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### Shared Methods and Instance Methods
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## Visual Basic Language and the .NET Framework
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You can also manipulate strings with the methods of the `String` class. There are two types of methods in `String`: *shared* methods and *instance* methods.
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#### Shared Methods
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Visual Basic methods are used as inherent functions of the language. They may be used without qualification in your code. The following example shows typical use of a Visual Basic string-manipulation command:
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A shared method is a method that stems from the `String` class itself and does not require an instance of that class to work. These methods can be qualified with the name of the class (`String`) rather than with an instance of the `String` class. For example:
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[!code-vb[VbVbalrStrings#45](~/samples/snippets/visualbasic/VS_Snippets_VBCSharp/VbVbalrStrings/VB/Class2.vb#45)]
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In the preceding example, the <xref:System.String.Copy%2A?displayProperty=nameWithType> method is a static method, which acts upon an expression it is given and assigns the resulting value to `bString`.
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#### Instance Methods
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[!code-vb[VbVbalrStrings#44](~/samples/snippets/visualbasic/VS_Snippets_VBCSharp/VbVbalrStrings/VB/Class2.vb#44)]
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In this example, the `Mid` function performs a direct operation on `aString` and assigns the value to `bString`.
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For a list of Visual Basic string manipulation methods, see [String Manipulation Summary](../../../language-reference/keywords/string-manipulation-summary.md).
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### Shared Methods and Instance Methods
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You can also manipulate strings with the methods of the `String` class. There are two types of methods in `String`: *shared* methods and *instance* methods.
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#### Shared Methods
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A shared method is a method that stems from the `String` class itself and does not require an instance of that class to work. These methods can be qualified with the name of the class (`String`) rather than with an instance of the `String` class. For example:
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[!code-vb[VbVbalrStrings#45](~/samples/snippets/visualbasic/VS_Snippets_VBCSharp/VbVbalrStrings/VB/Class2.vb#45)]
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In the preceding example, the <xref:System.String.Compare%2A?displayProperty=nameWithType> method is a shared method that accepts two instances of `String` as arguments.
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#### Instance Methods
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Instance methods, by contrast, stem from a particular instance of `String` and must be qualified with the instance name. For example:
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[!code-vb[VbVbalrStrings#46](~/samples/snippets/visualbasic/VS_Snippets_VBCSharp/VbVbalrStrings/VB/Class2.vb#46)]
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In this example, the <xref:System.String.Substring%2A?displayProperty=nameWithType> method is a method of the instance of `String` (that is, `aString`). It performs an operation on `aString` and assigns that value to `bString`.
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For more information, see the documentation for the <xref:System.String> class.
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Instance methods, by contrast, stem from a particular instance of `String` and must be qualified with the instance name. For example:
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[!code-vb[VbVbalrStrings#46](~/samples/snippets/visualbasic/VS_Snippets_VBCSharp/VbVbalrStrings/VB/Class2.vb#46)]
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In this example, the <xref:System.String.Substring%2A?displayProperty=nameWithType> method is a method of the instance of `String` (that is, `aString`). It performs an operation on `aString` and assigns that value to `bString`.
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For more information, see the documentation for the <xref:System.String> class.
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## See also
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- [Introduction to Strings in Visual Basic](introduction-to-strings.md)
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@ -1,4 +1,4 @@
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Option Explicit On
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Option Explicit On
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Option Strict On
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Class Class0bb85ddaa37f4a9799b48b344c5437be
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@ -10,10 +10,10 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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' <snippet35>
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Dim StrArray() As String = {"ABCDEFG", "HIJKLMNOP"}
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Dim FindThisString As String = "JKL"
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For Each Str As String In StrArray
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If Str.Contains(FindThisString) Then
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MsgBox("Found " & FindThisString & " at index " &
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MsgBox("Found " & FindThisString & " at index " &
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Str.IndexOf(FindThisString))
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End If
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Next
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@ -42,7 +42,7 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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Public Sub Method45()
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' <snippet45>
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Dim aString As String = String.Copy("A literal string")
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Dim equal As Boolean = (String.Compare("Hello", "Goodbye") = 0)
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' </snippet45>
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End Sub
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@ -50,7 +50,7 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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' <snippet46>
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Dim aString As String = "A String"
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Dim bString As String
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' Assign "String" to bString.
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bString = aString.Substring(2, 6)
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' </snippet46>
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@ -60,13 +60,13 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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' <snippet47>
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Dim MyString As String = "This is my string"
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Dim stringLength As Integer
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' Explicitly set the string to Nothing.
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MyString = Nothing
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' stringLength = 0
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stringLength = Len(MyString)
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' This line, however, causes an exception to be thrown.
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stringLength = MyString.Length
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' </snippet47>
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@ -85,7 +85,7 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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' <snippet49>
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Dim myString As String = "ABCDE"
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Dim myChar As Char
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' Assign "D" to myChar.
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myChar = myString.Chars(3)
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' </snippet49>
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@ -95,7 +95,7 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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' <snippet50>
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Dim myString As String = "ABCDE"
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Dim myInteger As Integer
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' Assign 3 to myInteger.
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myInteger = myString.IndexOf("D")
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' </snippet50>
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@ -108,7 +108,7 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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Dim cString As String = "C"
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Dim dString As String = "D"
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Dim myString As String
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' Assign "ABCD" to myString.
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myString = String.Concat(aString, bString, cString, dString)
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' </snippet51>
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@ -118,16 +118,16 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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' <snippet52>
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Dim myString As String = "UpPeR oR LoWeR cAsE"
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Dim newString As String
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' newString = "UPPER OR LOWER CASE"
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newString = UCase(myString)
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' newString = "upper or lower case"
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newString = LCase(myString)
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' newString = "UPPER OR LOWER CASE"
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newString = myString.ToUpper
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' newString = "upper or lower case"
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newString = myString.ToLower
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' </snippet52>
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@ -135,14 +135,14 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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Public Sub Method53()
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' <snippet53>
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Dim spaceString As String =
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Dim spaceString As String =
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" This string will have the spaces removed "
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Dim oneString As String
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Dim twoString As String
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' This removes all trailing and leading spaces.
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oneString = spaceString.Trim
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' This also removes all trailing and leading spaces.
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twoString = Trim(spaceString)
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' </snippet53>
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@ -161,10 +161,10 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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Dim aString As String = "This is My Str@o@o@ing"
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Dim myString As String
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Dim anotherString As String
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' myString = "This is My String"
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myString = aString.Remove(14, 5)
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' anotherString = "This is Another String"
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anotherString = myString.Replace("My", "Another")
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' </snippet55>
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@ -174,7 +174,7 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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' <snippet56>
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Dim aString As String = "This is My Stng"
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Dim myString As String
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' Results in a value of "This is My String".
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myString = aString.Insert(13, "ri")
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' </snippet56>
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@ -203,13 +203,13 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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' <snippet59>
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Dim aString As String = "Left Center Right"
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Dim rString, lString, mString As String
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' rString = "Right"
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rString = Mid(aString, 13)
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' lString = "Left"
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lString = Mid(aString, 1, 4)
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' mString = "Center"
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mString = Mid(aString, 6, 6)
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' </snippet59>
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@ -219,7 +219,7 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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' <snippet60>
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Dim aString As String = "Left Center Right"
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Dim subString As String
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' subString = "Center"
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subString = aString.Substring(5, 6)
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' </snippet60>
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@ -257,11 +257,11 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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Dim OneString As String
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Dim TwoString As String
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OneString = "one, two, three, four, five"
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' Evaluates to "two".
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TwoString = OneString.Substring(5, 3)
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OneString = "1"
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' Evaluates to "11".
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TwoString = OneString & "1"
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' </snippet64>
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@ -285,7 +285,7 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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' <snippet67>
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Dim myString As String = "ABCDE"
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Dim myChar As Char
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' The value of myChar is "D".
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myChar = myString.Chars(3)
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' </snippet67>
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@ -330,7 +330,7 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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' d0dc8317-9ab3-4324-99f7-3f5788c0e72a
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' How to: Convert an Array of Bytes into a String in Visual Basic
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' <snippet72>
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Private Function UnicodeBytesToString(
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Private Function UnicodeBytesToString(
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ByVal bytes() As Byte) As String
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Return System.Text.Encoding.Unicode.GetString(bytes)
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@ -342,8 +342,8 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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Public Sub Method73()
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' <snippet73>
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Dim MyString As String
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MyString = "This is the first line of my string." & VbCrLf &
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"This is the second line of my string." & VbCrLf &
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MyString = "This is the first line of my string." & VbCrLf &
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"This is the second line of my string." & VbCrLf &
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"This is the third line of my string."
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' </snippet73>
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End Sub
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@ -351,7 +351,7 @@ Class Class0bb85ddaa37f4a9799b48b344c5437be
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' f477d35c-a3fc-4a30-b1d4-cd0d353aae1d
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' How to: Convert Strings into an Array of Bytes in Visual Basic
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' <snippet74>
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Private Function UnicodeStringToBytes(
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Private Function UnicodeStringToBytes(
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ByVal str As String) As Byte()
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Return System.Text.Encoding.Unicode.GetBytes(str)
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