StringBuilder.EnsureCapacity Method
.NET Framework 2.0
Ensures that the capacity of this instance of StringBuilder is at least the specified value.
Namespace: System.Text
Assembly: mscorlib (in mscorlib.dll)
Assembly: mscorlib (in mscorlib.dll)
| Exception type | Condition |
|---|---|
| capacity is less than zero. -or- Enlarging the value of this instance would exceed MaxCapacity. |
The following code example demonstrates the EnsureCapacity method.
using System; using System.Text; class Sample { public static void Main() { StringBuilder sb1 = new StringBuilder("abc"); StringBuilder sb2 = new StringBuilder("abc", 16); Console.WriteLine(); Console.WriteLine("a1) sb1.Length = {0}, sb1.Capacity = {1}", sb1.Length, sb1.Capacity); Console.WriteLine("a2) sb2.Length = {0}, sb2.Capacity = {1}", sb2.Length, sb2.Capacity); Console.WriteLine("a3) sb1.ToString() = \"{0}\", sb2.ToString() = \"{1}\"", sb1.ToString(), sb2.ToString()); Console.WriteLine("a4) sb1 equals sb2: {0}", sb1.Equals(sb2)); Console.WriteLine(); Console.WriteLine("Ensure sb1 has a capacity of at least 50 characters."); sb1.EnsureCapacity(50); Console.WriteLine(); Console.WriteLine("b1) sb1.Length = {0}, sb1.Capacity = {1}", sb1.Length, sb1.Capacity); Console.WriteLine("b2) sb2.Length = {0}, sb2.Capacity = {1}", sb2.Length, sb2.Capacity); Console.WriteLine("b3) sb1.ToString() = \"{0}\", sb2.ToString() = \"{1}\"", sb1.ToString(), sb2.ToString()); Console.WriteLine("b4) sb1 equals sb2: {0}", sb1.Equals(sb2)); Console.WriteLine(); Console.WriteLine("Set the length of sb1 to zero."); Console.WriteLine("Set the capacity of sb2 to 51 characters."); sb1.Length = 0; sb2.Capacity = 51; Console.WriteLine(); Console.WriteLine("c1) sb1.Length = {0}, sb1.Capacity = {1}", sb1.Length, sb1.Capacity); Console.WriteLine("c2) sb2.Length = {0}, sb2.Capacity = {1}", sb2.Length, sb2.Capacity); Console.WriteLine("c3) sb1.ToString() = \"{0}\", sb2.ToString() = \"{1}\"", sb1.ToString(), sb2.ToString()); Console.WriteLine("c4) sb1 equals sb2: {0}", sb1.Equals(sb2)); } } /* This example produces the following results: a1) sb1.Length = 3, sb1.Capacity = 16 a2) sb2.Length = 3, sb2.Capacity = 16 a3) sb1.ToString() = "abc", sb2.ToString() = "abc" a4) sb1 equals sb2: True Ensure sb1 has a capacity of at least 50 characters. b1) sb1.Length = 3, sb1.Capacity = 51 b2) sb2.Length = 3, sb2.Capacity = 16 b3) sb1.ToString() = "abc", sb2.ToString() = "abc" b4) sb1 equals sb2: False Set the length of sb1 to zero. Set the capacity of sb2 to 51 characters. c1) sb1.Length = 0, sb1.Capacity = 51 c2) sb2.Length = 3, sb2.Capacity = 51 c3) sb1.ToString() = "", sb2.ToString() = "abc" c4) sb1 equals sb2: False */
// This example demonstrates StringBuilder.EnsureCapacity
// StringBuilder.Capacity
// StringBuilder.Length
// StringBuilder.Equals
import System.*;
import System.Text.*;
class Sample
{
public static void main(String[] args)
{
StringBuilder sb1 = new StringBuilder("abc");
StringBuilder sb2 = new StringBuilder("abc", 16);
Console.WriteLine();
Console.WriteLine("a1) sb1.get_Length() = {0}, "
+ "sb1.get_Capacity() = {1}",
System.Convert.ToString(sb1.get_Length()),
System.Convert.ToString(sb1.get_Capacity()));
Console.WriteLine("a2) sb2.get_Length() = {0}, "
+ "sb2.get_Capacity() = {1}",
System.Convert.ToString(sb2.get_Length()),
System.Convert.ToString(sb2.get_Capacity()));
Console.WriteLine("a3) sb1.ToString() = \"{0}\", "
+ "sb2.ToString() = \"{1}\"", sb1.ToString(), sb2.ToString());
Console.WriteLine("a4) sb1 equals sb2: {0}",
System.Convert.ToString(sb1.Equals(sb2)));
Console.WriteLine();
Console.WriteLine("Ensure sb1 has a capacity of at least 50 "
+ "characters.");
sb1.EnsureCapacity(50);
Console.WriteLine();
Console.WriteLine("b1) sb1.get_Length() = {0}, "
+ "sb1.get_Capacity() = {1}",
System.Convert.ToString(sb1.get_Length()),
System.Convert.ToString(sb1.get_Capacity()));
Console.WriteLine("b2) sb2.get_Length() = {0}, "
+ "sb2.get_Capacity() = {1}",
System.Convert.ToString(sb2.get_Length()),
System.Convert.ToString(sb2.get_Capacity()));
Console.WriteLine("b3) sb1.ToString() = \"{0}\", "
+ "sb2.ToString() = \"{1}\"", sb1.ToString(), sb2.ToString());
Console.WriteLine("b4) sb1 equals sb2: {0}",
System.Convert.ToString(sb1.Equals(sb2)));
Console.WriteLine();
Console.WriteLine("Set the length of sb1 to zero.");
Console.WriteLine("Set the capacity of sb2 to 51 characters.");
sb1.set_Length(0);
sb2.set_Capacity(51);
Console.WriteLine();
Console.WriteLine("c1) sb1.get_Length() = {0}, "
+ "sb1.get_Capacity() = {1}",
System.Convert.ToString(sb1.get_Length()),
System.Convert.ToString(sb1.get_Capacity()));
Console.WriteLine("c2) sb2.get_Length() = {0}, "
+ "sb2.get_Capacity() = {1}",
System.Convert.ToString(sb2.get_Length()),
System.Convert.ToString(sb2.get_Capacity()));
Console.WriteLine("c3) sb1.ToString() = \"{0}\", "
+ "sb2.ToString() = \"{1}\"", sb1.ToString(), sb2.ToString());
Console.WriteLine("c4) sb1 equals sb2: {0}",
System.Convert.ToString(sb1.Equals(sb2)));
} //main
} //Sample
/*
This example produces the following results:
a1) sb1.get_Length() = 3, sb1.get_Capacity() = 16
a2) sb2.get_Length() = 3, sb2.get_Capacity() = 16
a3) sb1.ToString() = "abc", sb2.ToString() = "abc"
a4) sb1 equals sb2: True
Ensure sb1 has a capacity of at least 50 characters.
b1) sb1.get_Length() = 3, sb1.get_Capacity() = 50
b2) sb2.get_Length() = 3, sb2.get_Capacity() = 16
b3) sb1.ToString() = "abc", sb2.ToString() = "abc"
b4) sb1 equals sb2: False
Set the length of sb1 to zero.
Set the capacity of sb2 to 51 characters.
c1) sb1.get_Length() = 0, sb1.get_Capacity() = 50
c2) sb2.get_Length() = 3, sb2.get_Capacity() = 51
c3) sb1.ToString() = "", sb2.ToString() = "abc"
c4) sb1 equals sb2: False
*/
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.