C# StringBuilder AppendFormat(IFormatProvider, String, Object[])
Description
StringBuilder AppendFormat(IFormatProvider, String, Object[])
Appends the string returned by processing a composite format string,
which contains zero or more format items, to this instance. Each format item
is replaced by the string representation of a corresponding argument in
a parameter array using a specified format provider.
Syntax
StringBuilder.AppendFormat(IFormatProvider, String, Object[]) has the following syntax.
public StringBuilder AppendFormat(
IFormatProvider provider,/*from ww w .ja v a2 s. c om*/
string format,
params Object[] args
)
Parameters
StringBuilder.AppendFormat(IFormatProvider, String, Object[]) has the following parameters.
provider- An object that supplies culture-specific formatting information.format- A composite format string (see Remarks).args- An array of objects to format.
Returns
StringBuilder.AppendFormat(IFormatProvider, String, Object[]) method returns A reference to this instance after the append operation has completed. After
the append operation, this instance contains any data that existed before
the operation, suffixed by a copy of format where any format specification
is replaced by the string representation of the corresponding object argument.
Example
The following example demonstrates the AppendFormat method.
using System;/*from ww w .j a v a2 s .co m*/
using System.Text;
using System.Globalization;
class Sample
{
public static void Main()
{
StringBuilder sb = new StringBuilder();
float var2 = 2.22F;
object[] var4 = { 3, 4.4, 'X' };
CultureInfo ci = new CultureInfo("es-ES", true);
sb.AppendFormat(ci, "5) {0}", var2);
Console.WriteLine(sb.ToString());
Customer customer = new Customer("C", 11111);
sb = new StringBuilder();
sb.AppendFormat(new CustomerNumberFormatter(), "{0}: {1}",
customer.CustomerNumber, customer.Name);
Console.WriteLine(sb.ToString());
}
}
public class Customer
{
private string custName;
private int custNumber;
public Customer(string name, int number)
{
this.custName = name;
this.custNumber = number;
}
public string Name
{
get { return this.custName; }
}
public int CustomerNumber
{
get { return this.custNumber; }
}
}
public class CustomerNumberFormatter : IFormatProvider, ICustomFormatter
{
public object GetFormat(Type formatType)
{
if (formatType == typeof(ICustomFormatter))
return this;
return null;
}
public string Format(string format, object arg, IFormatProvider provider)
{
string custNumber = ((int) arg).ToString("D10");
return custNumber;
}
}