Global.cs中自动获取未处理的异常

protected void Button1_Click(object sender, EventArgs e)
{
int a = 5;
int b = 2;
int c;
c = a / (b - 2);
}

protected void Application_Error(object sender, EventArgs e)
{
//获取异常信息
string strError = Server.GetLastError().ToString();
//可以将错误信息通过log4net写入到文本或数库中，这里只写在页面上
Response.Write("错误信息:" + strError + "");
Server.ClearError();
}