最后十分了,帮忙看一下吧!初学编程,谢谢!

Question

我在页面上有一个label2,我想让pv的值显示在label2上,不知道哪里有问题  protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {   int cs,pv;
            cs = System.Convert.ToInt32(xinxi("cishu"));
             if (cs == 1)
             {
                 pv = 13;
             }
             else
             {
                 if (cs == 2)
                 {
                     pv =27;
                 }
                 else
                 {
                     if (cs == 3)
                     {
                         pv = 80;
                     }
                     else
                     {
                         if (cs == 4)
                         {
                             pv = 100;
                         }
                         else
                         {
                             if (cs == 5)
                             {
                                 pv = 135;
                             }
                             else
                             {
                                 if (cs == 6)
                                 {
                                     pv = 160;
                                 }
                                 else
                                 {
                                     if (cs == 7)
                                     {
                                         pv = 120;
                                     }
                                     else
                                     {
                                         if (cs == 8)
                                         {
                                             pv = 320;
                                         }
                                         else
                                         {
                                             if (cs == 9)
                                             {
                                                 pv = 640;
                                             }
                                             else
                                             {
                                                 if (cs == 10)
                                                 {
                                                     pv = 1280;
                                                 }
                                                 else
                                                 {
                                                     if (cs == 11)
                                                     {
                                                         pv = 2560;
                                                     }
                                                 }
                                             }
                                         }                                     }
                                 }
                             }
                         }
                     }
                 }
             }
             return pv;
            this.Label1.Text = xinxi("cishu");
            this.Label2.Text ="+pv+";

Answer 1

this.Label2.Text = pv.ToString()

Answer 2

this.Label2.Text = pv.ToString()
报错为  CS0165: 使用了未赋值的局部变量“pv”

Answer 3

你  return pv;干嘛啊

Answer 4

return pv;去掉了,还是一样的

Answer 5

this.Label2.Text = pv.ToString()

Answer 6

cs就是 1 2 3 4...11,我想让当cs 取不同值的时候,将pv 的值显示在lalel2上

Answer 7

LZ这什么乱七八糟的
cs = System.Convert.ToInt32(xinxi("cishu"));
这是什么

Answer 8

整个页面的代码是这样的:
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;public partial class Mall_sysManage_duijiangtwo : System.Web.UI.Page
{
    DataBase MySQL = new DataBase();    protected void Page_Load(object sender, EventArgs e)
    {
        if (!Page.IsPostBack)
        {   int cs,pv;
            cs = System.Convert.ToInt32(xinxi("cishu"));
             if (cs == 1)
             {
                 pv = 5;
             }
             else
             {
                 if (cs == 2)
                 {
                     pv = 5;
                 }
                 else
                 {
                     if (cs == 3)
                     {
                         pv = 10;
                     }
                     else
                     {
                         if (cs == 4)
                         {
                             pv = 20;
                         }
                         else
                         {
                             if (cs == 5)
                             {
                                 pv = 40;
                             }
                             else
                             {
                                 if (cs == 6)
                                 {
                                     pv = 80;
                                 }
       
                             }
                         }
                     }
                 }
             }
            this.Label1.Text = xinxi("cishu");
            this.Label2.Text =pv.ToString();
            JiangBind();
        }
    }
    private void JiangBind()
    {
        DataSet ds = MySQL.ExDataSet("select * from [duijiang] where uid=" + ReaderUser(2));
        this.jiangRepeater.DataSource = ds.Tables["jiangCart"];
        this.jiangRepeater.DataBind();
        
        ds.Clear();
    }
    protected void postBtn_Click(object sender, EventArgs e)
    {
        int Num = 50;
        if (DateTime.Now.DayOfWeek.ToString() == "Saturday" || DateTime.Now.DayOfWeek.ToString() == "Sunday")
        {
            Response.Write(" <script>alert('今天是周末,不能对奖，请于星期一再来！');;window.location.href='userJiang.aspx'</script> ");
        }
        else
        {
            if (System.Convert.ToInt32(MySQL.ReturnVal("select jifen from users where id=" + ReaderUser(2))) < Num)
            {
                Response.Write("<script>alert('对不起,您的所余积分已经不足兑换您投奖了.')</script>");
            }
            else
            {
                if (MySQL.Execute("insert into toujiang (type,uid,num) values (0," + this.ReaderUser(2) + "," + this.skey.Text.Trim() + ")"))
                {
                    MySQL.Execute("update users set jifen=jifen-" + Num + " where id=" + ReaderUser(2));                    Response.Write("<script>alert('您的投奖内容已经提交成功,请等待结果吧.');window.location.href='userJiang.aspx'</script>");
                }
                else
                    Response.Write("<script>alert('对不起,投奖失败,请稍候再试.');</script>");
            }
        }
    }    private string xinxi(string obj)
    {
        string id = "";
        id = ReaderUser(2);
        return MySQL.ReturnVal("select " + obj + " from [duijiang] where uid=" + id);
    }
    private string ReaderUser(int i)
    {
        string[] arr = Request.Cookies["loginAdmin"].Value.ToString().Split(',');        string rval = "";        for (int j = 0; j < arr.Length; j++)
        {
            rval = arr[i].ToString();
        }        return rval;
    }
}

Answer 9

这样声明：
int cs;
int pv=0;this.Label2.Text = pv.ToString()我试过了，这样就OK了

Answer 10

这么多判断,为什么不用switch case