最近脑壳反应慢，问个简单问题，

Question

我想做csdn下载中   46 votes用户点击星星进行评分。然后将所有用户评星的平均值显示出来。最简单的做法是什么。

Answer 1

  public string MsgStatus(int i)
    {
        string Result = "";
        int j = i / 4;
        switch(j)
        //double j = Math.Ceiling(i / 4.0);
        //switch (Convert.ToInt32(j))
        { 
            case 0:
                Result = "差(1)";
                break;
            case 1:
                Result = "一般(2)";
                break;
            case 2:
                Result = "好(3)";
                break;
            case 3:
                Result = "很好(4)";
                break;
            case 4:
                Result = "非常好(5)";
                break;
            default:
                Result = "差(1)";
                break;
                
        }
        return Result;
    } 
    public int SumType1()
    {
        int i=0;
        string Drop1 = DropDownList1.SelectedValue;
        switch (Drop1)
        {
            case "差(1)":
                i = 0;
                break;
            case "一般(2)":
                i = 1;
                break;
            case "好(3)":
                i = 2;
                break;
            case "很好(4)":
                i = 3;
                break;
            case "非常好(5)":
                i = 4;
                break;
                
        }
        return i;
    }
    public int SumType2()
    {
        int i = 0;
        string Drop2 = DropDownList2.SelectedValue;
        switch (Drop2)
        {
            case "差(1)":
                i = 0;
                break;
            case "一般(2)":
                i = 1;
                break;
            case "好(3)":
                i = 2;
                break;
            case "很好(4)":
                i = 3;
                break;
            case "非常好(5)":
                i = 4;
                break;        }
        return i;
    }
    public int SumType3()
    {
        int i = 0;
        string Drop3 = DropDownList3.SelectedValue;
        switch (Drop3)
        {
            case "差(1)":
                i = 0;
                break;
            case "一般(2)":
                i = 1;
                break;
            case "好(3)":
                i = 2;
                break;
            case "很好(4)":
                i = 3;
                break;
            case "非常好(5)":
                i = 4;
                break;        }
        return i;
    }
    public int SumType4()
    {
        int i = 0;
        string Drop4 = DropDownList4.SelectedValue;
        switch (Drop4)
        {
            case "差(1)":
                i = 0;
                break;
            case "一般(2)":
                i = 1;
                break;
            case "好(3)":
                i = 2;
                break;
            case "很好(4)":
                i = 3;
                break;
            case "非常好(5)":
                i = 4;
                break;        }
        return i;
    }
    public string ReturnPic(string Comments)
    {
        string pic = "";
        switch (Comments)
        {
            case "差(1)":
                pic = "imagedp/1.gif";
                break;
            case "一般(2)":
                pic = "imagedp/2.gif";
                break;
            case "好(3)":
                pic = "imagedp/3.gif";
                break;
            case "很好(4)":
                pic = "imagedp/4.gif";
                break;
            case "非常好(5)":
                pic = "imagedp/5.gif";
                break;
                  
        }
        //Image1.Visible = true;
        //Image1.ImageUrl = pic;
        return pic;
        
    }

Answer 2

顶这个..
A对B 评2星
C对B 评4星
D对B 评4星
E对B 评2星
F对B 评3星结果这人的星级=(2+4+5+2+3)/5=3  
如果碰到不整除的.可以入或舍..这个你来定..

Answer 3

将评分值写入数据表
然后使用Sql的avg函数对列求平均值

Answer 4

  protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        try
        {
            //MsgInfo.UID = UserInfo.ID;
            MsgInfo.EMail = Mail;
            MsgInfo.Title = BJMsgInfo_Title.Text.Trim();
            MsgInfo.CompanyName = BJMsgInfo_CompanyName.Text.Trim();
            Category.ID = Convert.ToInt32(dropCategoryID.SelectedValue);
            WebManager.GetInfo(Category);
            string DType = Category.Title;
            BJProductCategory cc = new BJProductCategory(); 
            cc.ID = Convert.ToInt32(DropChild.SelectedValue);
            WebManager.GetInfo(cc);
            string XType = cc.Title;
            MsgInfo.Category = DType + "-->" + XType;
            MsgInfo.BusinessType = BJMsgInfo_BusinessType.SelectedItem.Text;
            MsgInfo.MsgInfo = BJMsgInfo_MsgInfo.Text.Trim();
            MsgInfo.CategoryProvince = Convert.ToInt32(BJMsgInfo_CategoryProvince.SelectedValue);
            //MsgInfo.BigCategory = BJMsgInfo_CategoryProvince.SelectedItem.Text;
            MsgInfo.Province = BJMsgInfo_CategoryProvince.SelectedItem.Text;
            MsgInfo.CategoryFrom = Convert.ToInt32(BJMsgInfo_CategoryFrom.SelectedValue);
            int d1 = SumType1() + SumType2() + SumType3() + SumType4();
            MsgInfo.Comments = MsgStatus(d1);
            MsgInfo.PictureUrl = ReturnPic(MsgInfo.Comments);
            MsgInfo.yzfd = DropDownList1.SelectedValue;
            MsgInfo.yzfw = DropDownList2.SelectedValue;
            MsgInfo.yzpl = DropDownList3.SelectedValue;
            MsgInfo.yzzl = DropDownList4.SelectedValue;
            WebManager.Insert(MsgInfo);
            ShowMessage(Consts.Save_AddSuccess);
        }
        catch (Exception ex)
        {
            this.ShowMessage(ex.Message);
        }
    }
    public void BindPic()
    {
        int d1 = SumType1() + SumType2() + SumType3() + SumType4();
        Image1.Visible = true;
        Image1.ImageUrl = ReturnPic(MsgStatus(d1));
    }
       protected void DropDownList4_SelectedIndexChanged(object sender, EventArgs e)
    {
        BindPic();
    }    protected void DropDownList1_SelectedIndexChanged(object sender, EventArgs e)
    {
        BindPic();
    }    protected void DropDownList2_SelectedIndexChanged(object sender, EventArgs e)
    {
        BindPic();
    }    protected void DropDownList3_SelectedIndexChanged(object sender, EventArgs e)
    {
        BindPic();
    }

Answer 5

AJAX ! ! ! ! Winform 那更好办了