/// <summary> /// 改变richTextBox中指定字符串的颜色 /// 调用即可 /// </summary> /// <param name="str" value="为指定的字符串"></param> public int changeColor(string[] str) { ArrayList list = null; int b = 0; for (int i = 0; i < str.Length; i++) { list = RichTextBoxHelper.getIndexArray(richTextBox1.Text.ToLower(), str[i]); b += list.Count; } for (int i = 0; i < str.Length; i++) { list = RichTextBoxHelper.getIndexArray(richTextBox1.Text.ToLower(), str[i]); if (list.Count == 0) { continue; } if (a == b) { richTextBox1.SelectionColor = Color.Empty; return(b); } for (int j = 0; j < list.Count; j++) { int index = (int)list[j]; richTextBox1.Select(index, str[i].Length); richTextBox1.SelectionColor = Color.Blue; this.richTextBox1.Focus(); //设置光标的位置到文本尾 this.richTextBox1.Select(this.richTextBox1.TextLength, 0); //滚动到控件光标处 this.richTextBox1.ScrollToCaret(); richTextBox1.SelectionColor = Color.Empty; } } return(b); }