HOW TO：將字元寫入至字串
更新：2007 年 11 月
下列程式碼範例自字元陣列的指定位置開始，從陣列中寫入一定數目字元到現有字串。請使用 StringWriter，如下所示。
範例
Option Explicit On
Option Strict On
Imports System
Imports System.IO
Imports System.Text
Public Class CharsToStr
Public Shared Sub Main()
' Create an instance of StringBuilder that can then be modified.
Dim sb As New StringBuilder("Some number of characters")
' Define and create an instance of a character array from which
' characters will be read into the StringBuilder.
Dim b As Char() = {" "c, "t"c, "o"c, " "c, "w"c, "r"c, "i"c, "t"c, "e"c, " "c, "t"c, "o"c, "."c}
' Create an instance of StringWriter
' and attach it to the StringBuilder.
Dim sw As New StringWriter(sb)
' Write three characters from the array into the StringBuilder.
sw.Write(b, 0, 3)
' Display the output.
Console.WriteLine(sb)
' Close the StringWriter.
sw.Close()
End Sub
End Class
using System;
using System.IO;
using System.Text;
public class CharsToStr
{
public static void Main(String[] args)
{
// Create an instance of StringBuilder that can then be modified.
StringBuilder sb = new StringBuilder("Some number of characters");
// Define and create an instance of a character array from which
// characters will be read into the StringBuilder.
char[] b = {' ','t','o',' ','w','r','i','t','e',' ','t','o','.'};
// Create an instance of StringWriter
// and attach it to the StringBuilder.
StringWriter sw = new StringWriter(sb);
// Write three characters from the array into the StringBuilder.
sw.Write(b, 0, 3);
// Display the output.
Console.WriteLine(sb);
// Close the StringWriter.
sw.Close();
}
}
穩固程式設計
這個範例說明如何使用 StringBuilder，以修改現有字串。注意，這需要額外的 using 宣告，因為 StringBuilder 類別是 System.Text 命名空間的成員。同樣的，這是直接建立並初始化字元陣列的範例，不需定義字串並轉換它為字元陣列。
這個程式碼產生下列輸出。
Some number of characters to