关于记事本的“查找下一个”以及“向上向下”，C#.net的一个简单实现

然后纠缠了一个晚上，终于把高手们不怎么感兴趣的记事本“查找下一个”给实现了。

本人对是c++转过来学.net 的，理解方式可能还保留了C++的习惯，各位将就啦。



private void button1_Click(object sender, EventArgs e)

{

//fm1.textBox1 .Text =textBox1 .Text ;



fm1.richTextBox1.Focus();

if (radioButton1.Checked == true)

i = fm1.richTextBox1.Find(textBox1.Text, i + 1, RichTextBoxFinds.MatchCase);

else if (radioButton2.Checked == true)

if (i == 0)

i = 1;

else if (i >= 0)

i = fm1.richTextBox1.Find(textBox1.Text, 0, i - 1, RichTextBoxFinds.Reverse);

else if (i < 0)

i = 0;



}

在msdn中，很容易的找到了这个（当时理所当然的，在开始位置int start那里填上了i，结果发现根本无法继续，进入死循环了，呵呵）



Overload List

	Name	Description
	Find( array< , Int32, Int32)	Searches a range of text in a RichTextBox control for the first instance of a character from a list of characters.
	Find(String, Int32, RichTextBoxFinds)	Searches the text in a RichTextBox control for a string at a specific location within the control and with specific options applied to the search.
	Find(String, Int32, Int32, RichTextBoxFinds)	Searches the text in a RichTextBox control for a string within a range of text within the control and with specific options applied to the search.