| 发表于:2007-09-07 09:17:424楼 得分:20 |
int i; bool flag = false; private void button4_click(object sender, system.eventargs e) { this.textbox1.text = "123456789 "; i = 0; timer timer = new timer(); timer.tick += new eventhandler(timer_tick); timer.interval = 100; this.textbox1.focus(); this.textbox1.select(0,1); timer.start(); } private void timer_tick(object sender, system.eventargs e) { if(this.i == this.textbox1.text.length ) { this.flag = true; } if(this.i == 0 ) { this.flag = false; } if(this.flag) { this.textbox1.selectionstart = --i; } else { this.textbox1.selectionstart = ++i; } } 很简单,你可以试试 | | |
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