Question

我一直在尝试使用泛型来存储会话中的数据。它将有2个页面和1个类名人员来处理信息。

第1页默认页面允许用户输入名称并选择性别和日期。我正在尝试将提交的内容存储到通用＆amp;会话带到第二页显示所有提交的用户数据。

DefaultPage

public partial class _Default : Page
{
    Person p;
    List<Person> Test;
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {
            Test = new List<Person>();
            Session["carrytonext"] = Test;
        }
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
       Person p = new Person(TextBox1.Text, DropDownList1.SelectedValue, Calendar1.SelectedDate);
        Label1.Text = p.PrintPerson();
        Test = (List<Person>)Session["carrytonext"];
        Test.Add(new Person(TextBox1.Text, DropDownList1.SelectedValue, Calendar1.SelectedDate));

    }
}

这是我的班级：

public class Person
{
    public string name;
    private string gender;
    private DateTime dob;

    public string Name
    {
        get
        {return name;}

        set
        {name = value;}
    }

    public string Gender
    {
        get
        {return gender;}

        set
        {gender = value;}
    }

    public DateTime Dob
    {
        get
        {return dob;}

        set
        {dob = value;}
    }

    public Person(string name, string gender, DateTime dob)
    {
        this.name = name;
        this.gender = gender;
        this.dob = dob;
    }

    public string PrintPerson()
    {
        string s;
        s = "Hello, my name is " + name + ". I'm " + gender + ". My DOB is " + dob.ToShortDateString() + "\n\n";
        return s;
    }
}

在我的第二页：

protected void Page_Load(object sender, EventArgs e)
{
    foreach (var inputstring in Test)
    {
        ListBox1.Items.Add(inputstring + "");
    }
}

Answer 1

您必须再次从测试列表设置会话：

第1页

protected void Button1_Click(object sender, EventArgs e)
{
   Person p = new Person(TextBox1.Text, DropDownList1.SelectedValue, Calendar1.SelectedDate);
    Label1.Text = p.PrintPerson();
    Test = (List<Person>)Session["carrytonext"];
    Test.Add(new Person(TextBox1.Text, DropDownList1.SelectedValue, Calendar1.SelectedDate));
    // Add this line to your code
    Session["carrytonext"] = Test;       
}

第2页

protected void Page_Load(object sender, EventArgs e)
{
    List<Person> test = (List<Person>)Session["carrytonext"];  
    foreach (var inputstring in Test)
    {
        // change here
        ListBox1.Items.Add(inputstring.PrintPerson()+" ");
    }
}

C＃Generic to Session

1 个答案: