请帮我看看是哪里有问题,该如何改正??

Question

c# 
public void tiqu()
{  
string finder = "1234567890";
}
private void persGSMToolStripMenuItem_Click(object sender, EventArgs e)
{
tiqu();
richTextBox1.Text = richTextBox1.Text.Replace(finder, "PersGSM");

}

Answer 1

你这么编码，编译器不报错？public String tiqu(){  string finder = "1234567890";return finder;}private void persGSMToolStripMenuItem_Click(object sender, EventArgs e){string finder =tiqu();richTextBox1.Text = richTextBox1.Text.Replace(finder, "PersGSM");} 

Answer 2

public void tiqu(){  string finder = "1234567890";}finder是一个局部变量，当这个函数执行完毕的时候，finder已经释放了，在内存中已经不存在了。可以修改为public string tiqu(){  string finder = "1234567890";return finder;}private void persGSMToolStripMenuItem_Click(object sender, EventArgs e){string fineder = tiqu();richTextBox1.Text = richTextBox1.Text.Replace(finder, "PersGSM");}