回发或回调参数无效。(三级无刷新引发)

lucky313 2007-12-21 01:35:24

小弟最近在看国省市和年月日的三级js无刷新..

如果把enableEventValidation设为false``服务器端则拿不到值不知大伙是怎么解决这个问题的呢`看到有人说直接在onchange调用js方法。但还是行不通`所以上来麻烦大家了。

HTML Code:

<html xmlns="http://www.w3.org/1999/xhtml" >

<head runat="server">

    <title>无标题页</title>

    <% =strAreaData %>

    <script type="text/javascript">

    function changeprovince()

    {

    document.all("<% =ddlProvince.ClientID %>").length = 0; 

    document.all("<% =ddlProvince.ClientID %>").options[0] = new Option('选择省','0');

    document.all("<% =ddlCity.ClientID %>").length = 0; 

    document.all("<% =ddlCity.ClientID %>").options[0] = new Option('选择城市','0');

    var oneid=document.all("<% =ddlCountry.ClientID %>").value;

    var i;

    for (i=0;i < onecount; i++)

        {

            if (subcat[i][2] == oneid)

            {            

                

                document.all("<% =ddlProvince.ClientID %>").options[document.all("<% =ddlProvince.ClientID %>").length] = new Option(subcat[i][0], subcat[i][1]);

             }        

        }

       

        

    }

    

   function changecity()

    {

    document.all("<% =ddlCity.ClientID %>").length = 0; 

    document.all("<% =ddlCity.ClientID %>").options[0] = new Option('选择城市','0');

    var twoid=document.all("<% =ddlProvince.ClientID %>").value;    

    var i;

    for (i=0;i < onecount1; i++)

        {            

            if (subcat1[i][2] == twoid)

            {

                document.all("<% =ddlCity.ClientID %>").options[document.all("<% =ddlCity.ClientID %>").length] = new Option(subcat1[i][0], subcat1[i][2]);

            }        

            

        }

    }

    function getYear()

    {

        writeMonth();

    }

    function getMonth()

    {

       

        var year=document.all("<% = ddlYear.ClientID %>").value; 

          var month=document.all("<%= ddlMonth.ClientID %>").value;

          

          if(year!=""&&month!="")

          {

              var   n   =   MonHead[month];              

              if   (month  ==1   &&   IsPinYear(year))  

              { 

                 n++; 

              }

              

            writeDay(n);

           }

           else

           {

            alert("年月不能为空！");

           }

    }

    

    function writeMonth()

    {   

        for(var i=1;i<count;i++)

        {            

            document.all("<%=ddlMonth.ClientID %>").options[i] = new Option(monthcount[i][0],monthcount[i][1]);

        }

        

    }

    function   writeDay(n)     //据条件写日期的下拉框   

     {   

          var   e   =   document.all("<%=ddlDay.ClientID %>");   

          optionsClear(e);   

          for   (var   i=1;   i<(n+1);   i++)   

                  e.options.add(new   Option("  "+   i   +   " 日",   i));   

     }   

      function   IsPinYear(year)//判断是否闰平年   

      {       

              return(0   ==   year%4   &&   (year%100   !=0   ||   year%400   ==   0));   

      }  

      function   optionsClear(e)   

    {   

          e.options.length   =   1;   

    }

        </script>   

</head>

<body>

    <form id="form1" runat="server">

    <div>

    <asp:DropDownList ID="ddlCountry" runat="server"  AppendDataBoundItems="True">

                        <asp:ListItem Value="0">请选择国家</asp:ListItem>

                    </asp:DropDownList>

                    <asp:DropDownList ID="ddlProvince" runat="server" >

                        <asp:ListItem Value="0">全部</asp:ListItem>

                    </asp:DropDownList>

                    <asp:DropDownList ID="ddlCity" runat="server" >

                        <asp:ListItem Value="0">全部</asp:ListItem>

                    </asp:DropDownList>

        <asp:DropDownList ID="ddlYear" runat="server" onchange="getYear()">

        </asp:DropDownList><asp:DropDownList ID="ddlMonth" runat="server" onchange="getMonth()" >

        <asp:ListItem Text="aa" Value="aa"></asp:ListItem></asp:DropDownList><asp:DropDownList ID="ddlDay" runat="server">

        </asp:DropDownList>

        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />

        </div>

    </form>

</body>

</html>

.cs Code:

using System.Data.OleDb;



public partial class _Default : System.Web.UI.Page 

{

    string ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source='C:/area.mdb'";

    OleDbCommand cmd = null;

    public string strAreaData = "";

    protected void Page_Load(object sender, EventArgs e)

    {

        

            OleDbConnection cnn = new OleDbConnection(ConnectionString);

            cnn.Open();



            ddlCountry.Attributes.Add("onchange", "changeprovince()");

            ddlProvince.Attributes.Add("onchange", "changecity()");

            string strSQL;

            strSQL = "select * from area where areaFather=0 ";

            cmd = new OleDbCommand(strSQL, cnn);

            OleDbDataAdapter da = new OleDbDataAdapter(strSQL, cnn);

            DataSet ds = new DataSet();

            da.Fill(ds);

            ddlCountry.DataSource = ds.Tables[0];

            ddlCountry.DataTextField = "area";

            ddlCountry.DataValueField = "id";

            ddlCountry.DataBind();

            strAreaData = "<script language = 'JavaScript' type='text/javascript'>var onecount;onecount=0;subcat = new Array();";

            strSQL = "select * from area where areaFather<>0";



            cmd = new OleDbCommand(strSQL, cnn);

            OleDbDataReader dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);

            int i1 = 0;

            while (dr.Read())

            {

                strAreaData += "subcat[" + i1.ToString() + "] = new Array('" + dr["area"].ToString() + "','" + dr["id"].ToString() + "','" + dr["areaFather"].ToString() + "');";

                i1++;



            }

            dr.Close();

            dr.Dispose();

            strAreaData += "onecount=" + i1.ToString() + ";";



            //添加三级地区

            strAreaData += "var onecount1;onecount1=0;subcat1 = new Array();";



            strSQL = "select * from area where areaFather<>0";

            if (cnn.State == ConnectionState.Closed)

                cnn.Open();

            cmd.CommandText = strSQL;

            cmd.Connection = cnn;

            dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);

            int n1 = 0;

            while (dr.Read())

            {

                strAreaData += "subcat1[" + n1.ToString() + "] = new Array('" + dr["area"].ToString() + "','" + dr["id"].ToString() + "','" + dr["areaFather"].ToString() + "');"; n1++;



            }

            dr.Close();

            strAreaData += "onecount1=" + n1.ToString() + ";";

            cnn.Close();

            strAreaData += " var count =0;monthcount = new Array();";

            strAreaData += " MonHead   =   [31,   28,   31,   30,   31,   30,   31,   31,   30,   31,   30,   31];";

            int year = DateTime.Now.Year;

            for (int i = (year - 30); i < (year + 31); i++)

            {

                ListItem li = new ListItem(i + " 年", i.ToString());

                this.ddlYear.Items.Add(li);

            }           

            for (int i = 0; i < 12; i++)

            {

                strAreaData += "monthcount[" + (i+1) + "] = new Array('" + (i+1) + "月' ,'" + i + "') ;";

            }

            strAreaData += "count = " + 13 + ";";

            strAreaData += "</script>";

        

    }

  



    protected void Button1_Click(object sender, EventArgs e)

    {



        Response.Write("<script>alert('" + this.ddlCountry.Items[ddlCountry.SelectedIndex].Text + "')</script>");

        Response.Write("<script>alert('" + this.ddlProvince.Items[ddlProvince.SelectedIndex].Text + "')</script>");

        

    }

   

}