其他操作 11 chars: ABCDEFGHI JK ■AppendFormat3实现19 chars: Ahabet:ABCDEFGHIJK加 在StringBuilderx对请按任意键继续.· public System.Text.StringBuilder AppendFormat(string format,params object[args) StringBuilder sb4=new StringBuilder("ABC",50); sb4.Append(new char[]'D','E','F'}); sb4.AppendFormat("GHIO]1]",'J,'k'); Console.WriteLine("[0}chars:{1}",sb4.Length,sb4.ToString()); sb4.Insert(0,"Alphabet:"); sb4.Replace('k','K'); sb4.Remove(1,2); Console.WriteLine("[0}chars:{1}",sb4.Length,sb4.Tostring()); newChar) 15 15 其他操作 ▪ AppendFormat实现对追加部分字符串的格式化，并追加 在StringBuilder对象结尾处 ◼ public System.Text.StringBuilder AppendFormat(string format, params object[] args) ▪ 从指定位置删除一定数量的字符 ◼ public System.Text.StringBuilder Remove(int startIndex, int length) ▪ 替换操作 ◼ public System.Text.StringBuilder Replace(string oldValue, string newValue) ◼ public System.Text.StringBuilder Replace(char oldChar, char newChar)