ASP.net页面数据回送三种方法

第1种回送方式：同页面回送测试数据
新建几个Label和一个Button  在同一页面旋转一个隐藏Label用于显示传递数据显示。OnButtonClick代码如下：
同页面显示数据：

protected void buttonSubmit_Click(object sender, EventArgs e)
        {
            string selectedEvent = dropDownListEvents.SelectedValue;
            string txtFirstName = textFirstName.Text;
            string txtLastName = textLastName.Text;
            string txtEmail = textEmail.Text;
            labelResult.Text = string.Format("{0} {1} selected {2},the Email Address is {3}",txtFirstName,txtLastName,selectedEvent,txtEmail);
        }

第2种回送方式：第二页面显示测试数据(非调用类方法传递数据)
1.关键在提交按钮中设置:postbackurl地址设置为新结果而Resultpage.aspx;
2.在resultpage.aspx页面中page_load中加入此代码：

try
                    {
                        DropDownList dropDownListEvents = (DropDownList)PreviousPage.FindControl("dropDownListEvents");
                        string selectedEvent = dropDownListEvents.SelectedValue;
                        string firstName = ((TextBox)PreviousPage.FindControl("textFirstName")).Text;
                        string lastName = ((TextBox)PreviousPage.FindControl("textLastName")).Text;
                        string email = ((TextBox)PreviousPage.FindControl("textEmail")).Text;
                        labelResult.Text = String.Format("{0} {1} selected the event {2}",firstName, lastName, selectedEvent);
                     }
                catch
                    {
                        labelResult.Text = "The originating page must contain " + "textFirstName, textLastName, textEmail controls";
                    }

第3种回送方式：(使用公共类方法调用传递参数数据)
1.新建一个公共类方法(RegistrationInfo类)：

public class RegistrationInfo
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public string Email { get; set; }
        public string SelectedEvent { get; set; }
    }

2.在Registration.aspx中调用这个公共类并赋值：

public RegistrationInfo RegistrationInfo
        {
            get
            {
                return new RegistrationInfo
                {
                    FirstName = textFirstName.Text,
                    LastName = textLastName.Text,
                    Email = textEmail.Text,
                    SelectedEvent = dropDownListEvents.SelectedValue
                };
            }
        }

3.在结果页resultpage.aspx中显示出来，使用previouspage获取前面页面数据

protected void Page_Load(object sender, EventArgs e)
        {
            try
            {
                if (!PreviousPage.IsValid)
                {
                    labelResult.Text = "Error in previous page!";
                    return;
                }
                RegistrationInfo ri = PreviousPage.RegistrationInfo;
                labelResult.Text = String.Format("{0} {1} selected the event {2} ,Email Address is {3}",ri.FirstName, ri.LastName, ri.SelectedEvent,ri.Email);
            }
            catch
            {
                labelResult.Text = "The originating page must contain " + "textFirstName, textLastName, textEmail controls";
            }
}