public void TrimStartTest() { StringBuilder sb = new StringBuilder("asdfgef"); Assert.Equal(sb.TrimStart('a').ToString(), "sdfgef"); sb.Insert(0, " "); Assert.Equal(sb.TrimStart().ToString(), "sdfgef"); Assert.Equal(sb.TrimStart("sdf").ToString(), "gef"); Assert.Equal(sb.TrimStart("gef").ToString(), string.Empty); }
/// <summary> /// 删除前、后空格 /// </summary> /// <param name="sb"></param> /// <returns></returns> public static StringBuilder Trim(this System.Text.StringBuilder sb) { return(sb.TrimStart().TrimEnd()); }