#region 文字换行 /// <summary> /// 文字换行 /// <para>eg:StringHelper.WrapText("YanZhiwei", 3);==>"Yan\r\nZhi\r\nwei"</para> /// </summary> /// <param name="data">需要换行的文字</param> /// <param name="maxWidth">多少长度换行</param> /// <returns>换行好的文字</returns> public static string WrapText(this string data, int maxWidth) {     int _stringCount = data.Length;     if (maxWidth > 0 && _stringCount > maxWidth)     {  StringBuilder _builderString = new StringBuilder(data);  int _breakCount = _builderString.Length / maxWidth;  for (int i = 0; i < _breakCount; i++)  {      int _insertPosition = i * maxWidth;      if (_insertPosition != 0)      {   int _offset = (i - 1) * 2;//(\r\n)   _builderString.Insert(_insertPosition + _offset, Environment.NewLine);      }  }  return _builderString.ToString();     }     else     {  return data;     } } #endregion

[TestMethod()] public void WrapTextTest() {     string _actual = StringHelper.WrapText("YanZhiwei", 3);     Assert.AreEqual<string>(@"Yan Zhi wei", _actual); }