Articolo
11/18/2011

StringBuilder Constructor (String, Int32, Int32, Int32)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Initializes a new instance of the StringBuilder class from the specified substring and capacity.

Namespace: System.Text
Assembly: mscorlib (in mscorlib.dll)

Syntax

'Declaration
<SecuritySafeCriticalAttribute> _
Public Sub New ( _
    value As String, _
    startIndex As Integer, _
    length As Integer, _
    capacity As Integer _
)

[SecuritySafeCriticalAttribute]
public StringBuilder(
    string value,
    int startIndex,
    int length,
    int capacity
)

Parameters

value
Type: System.String
The string that contains the substring used to initialize the value of this instance. If value is nulla null reference (Nothing in Visual Basic), the new StringBuilder will contain the empty string (that is, it contains Empty).

startIndex
Type: System.Int32
The position within value where the substring begins.

length
Type: System.Int32
The number of characters in the substring.

capacity
Type: System.Int32
The suggested starting size of the StringBuilder.

Exceptions

Exception	Condition
ArgumentOutOfRangeException	capacity is less than zero. -or- startIndex plus length is not a position within value.

ArgumentOutOfRangeException

capacity is less than zero.

-or-

startIndex plus length is not a position within value.

Remarks

If capacity is zero, the implementation-specific default capacity is used.

Examples

The following code example demonstrates how to call the StringBuilder constructor with the specified string.

Dim initialString As String = "Initial string for stringbuilder."
Dim startIndex As Integer = 0
Dim substringLength As Integer = 14
Dim capacity As Integer = 255
Dim stringBuilder As New StringBuilder(initialString, _
    startIndex, substringLength, capacity)

string initialString = "Initial string for stringbuilder.";
int startIndex = 0;
int substringLength = 14;
int capacity = 255;
StringBuilder stringBuilder = new StringBuilder(initialString,
    startIndex, substringLength, capacity);

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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