选择中国省市的控件

//选择中国省市的控件
    public class ChinaCitySelector:Control
    {
        private DropDownList ddlProvince=new DropDownList();
        private DropDownList ddlCity=new DropDownList();
        private Label lJscript=new Label();
        private StringBuilder sbJscript=new StringBuilder();
        private string _city="0";
        private string _type="add";
        private string client_province=null;
        private string client_city=null;
        private string client_function=null;

        public string Province
        {
            get
            {
                if(ddlProvince.Page!=null)
                {
                    SetProvince(ddlCity.Page.Request.Form[client_province].ToString().Trim());
                    SetCity(ddlCity.Page.Request.Form[client_city].ToString().Trim());
                    return ddlCity.Page.Request.Form[client_province].ToString().Trim();
                }
                else
                {
                    return ddlProvince.SelectedValue.ToString().Trim();
                }
            }

            set
            {
                SetProvince(value);
            }
        }
        public string City
        {
            get
            {
                if(ddlCity.Page.Request.Form[client_city]!=null)
                {
                    SetProvince(ddlCity.Page.Request.Form[client_province].ToString().Trim());
                    SetCity(ddlCity.Page.Request.Form[client_city].ToString().Trim());
                    return ddlCity.Page.Request.Form[client_city].ToString().Trim();
                }
                else
                {
                    return _city;
                }
            }
            set
            {
                _city=value;
                SetCity(value);
            }
        }
        public string type
        {
            get
            {
                return _type;
            }
            set
            {
                _type=value;
                BindProvince();
                BindCity();
            }
        }


        public ChinaCitySelector()
        {



            Controls.Add(ddlProvince);
            Controls.Add(ddlCity);
            Controls.Add(lJscript);

            //GenCode();


        }

        public void GenCode()
        {
            string uniqueFlag=this.ID.ToString();

            ddlProvince.ID="province"+uniqueFlag;
            ddlCity.ID="city"+uniqueFlag;
            client_province=ddlProvince.ID.ToString();
            client_city=ddlCity.ID.ToString();
            client_function="ChinaCitySelector"+uniqueFlag;
            BindProvince();
            BindCity();
            ddlProvince.SelectedIndex=0;
            ddlProvince.Attributes.Add("OnChange",client_function+"_setcity("+client_province+","+client_city+");");
        }

        private void SetProvince(string province)
        {
            ddlProvince.ClearSelection();
            if(ddlProvince.Items.FindByValue(province)!=null)ddlProvince.Items.FindByValue(province).Selected=true;
            lJscript.Text+="<script language='JavaScript'>"+client_function+"_setcity(myForm."+client_province+",myForm."+client_city+");</script>";


        }
        private void SetCity(string city)
        {

            lJscript.Text+="<script language='JavaScript'>\n";
            lJscript.Text+="for(var i = 0; i <myForm."+client_city+".length; i++)\n";
            lJscript.Text+="{\n    if(myForm."+client_city+".options[i].value==\""+city+"\")myForm."+client_city+".selectedIndex = i;\n}\n";
            lJscript.Text+="</script>";

        }

        private void BindProvince()
        {
            ddlProvince.Items.Clear();
            if(type=="add")
            {
                ddlProvince.Items.Add(new ListItem("选择所在省份","0"));
            }
            else
            {
                ddlProvince.Items.Add(new ListItem("所有省份","0"));
            }
            ddlProvince.Items.Add(new ListItem("北京","北京"));
            ddlProvince.Items.Add(new ListItem("上海","上海"));
            ddlProvince.Items.Add(new ListItem("重庆","重庆"));
            ddlProvince.Items.Add(new ListItem("福建","福建"));
            ddlProvince.Items.Add(new ListItem("甘肃","甘肃"));
            ddlProvince.Items.Add(new ListItem("广东","广东"));
            ddlProvince.Items.Add(new ListItem("广西","广西"));
            ddlProvince.Items.Add(new ListItem("贵州","贵州"));
            ddlProvince.Items.Add(new ListItem("海南","海南"));
            ddlProvince.Items.Add(new ListItem("河北","河北"));
            ddlProvince.Items.Add(new ListItem("黑龙江","黑龙江"));
            ddlProvince.Items.Add(new ListItem("河南","河南"));
            ddlProvince.Items.Add(new ListItem("湖北","湖北"));
            ddlProvince.Items.Add(new ListItem("湖南","湖南"));
            ddlProvince.Items.Add(new ListItem("江苏","江苏"));
            ddlProvince.Items.Add(new ListItem("安徽","安徽"));
            ddlProvince.Items.Add(new ListItem("江西","江西"));
            ddlProvince.Items.Add(new ListItem("吉林","吉林"));
            ddlProvince.Items.Add(new ListItem("辽宁","辽宁"));
            ddlProvince.Items.Add(new ListItem("内蒙古","内蒙古"));
            ddlProvince.Items.Add(new ListItem("宁夏","宁夏"));
            ddlProvince.Items.Add(new ListItem("青海","青海"));
            ddlProvince.Items.Add(new ListItem("山东","山东"));
            ddlProvince.Items.Add(new ListItem("山西","山西"));
            ddlProvince.Items.Add(new ListItem("陕西","陕西"));
            ddlProvince.Items.Add(new ListItem("四川","四川"));
            ddlProvince.Items.Add(new ListItem("天津","天津"));
            ddlProvince.Items.Add(new ListItem("新疆","新疆"));
            ddlProvince.Items.Add(new ListItem("西藏","西藏"));
            ddlProvince.Items.Add(new ListItem("云南","云南"));
            ddlProvince.Items.Add(new ListItem("浙江","浙江"));
            ddlProvince.Items.Add(new ListItem("香港","香港"));
            ddlProvince.Items.Add(new ListItem("澳门","澳门"));
            ddlProvince.Items.Add(new ListItem("台湾","台湾"));
        }

        private void BindCity()
        {
            sbJscript.Remove(0,sbJscript.Length);
            sbJscript.Append("<SCRIPT LANGUAGE=\"JavaScript\" >\n");
            sbJscript.Append("\n");
            sbJscript.Append("</SCRIPT>\n");
            lJscript.Text=sbJscript.ToString();
        }
    }

posted on 2007-05-23 13:24 mbskys 阅读(419) 评论(0) 编辑收藏举报