using System;
using System.Reflection;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.Collections;
using System.Collections.Specialized;

namespace YOYOSOFT.Framework.Web.UI.Controls
{
    /// <summary>
    /// EnhanceDataGrid 的摘要说明。
    /// </summary>
    [ToolboxData("<{0}:EnhanceDataGrid runat=server></{0}:EnhanceDataGrid>")]
    public class EnhanceDataGrid : System.Web.UI.WebControls.DataGrid
    {
        [Bindable(true),
            Category("Appearance"),
            DefaultValue("")]
        public string ConfigFile
        {
            get{return _configFile.Trim();}
            set{_configFile = value;}
        }string _configFile = string.Empty;

        protected override void OnPreRender(EventArgs e)
        {
            if(this.ConfigFile.Length != 0)
            {
                string filePath = System.Web.HttpContext.Current.Server.MapPath(this.ConfigFile);
                NameValueCollection values = Globals.GetNameValues(filePath);
                SetStyle(values);
            }    
            base.OnPreRender (e);
        }

        private void SetStyle(NameValueCollection values)
        {
            if(values == null) return;

            string typeName;
            Type t = base.GetType();
            string[] types;
            for(int i=0; i<values.Count; i++)
            {
                typeName = values.Keys[i];
                types = typeName.Split('.');
                PropertyInfo parentInfo = t.GetProperty(types[0]);
                if(parentInfo == null) continue; 
                
                if(types.Length >= 2)
                {
                    PropertyInfo childInfo = parentInfo.PropertyType.GetProperty(types[1]);
                    SetPropertyValue(childInfo,
                        parentInfo.GetValue(this,null),values[i]);
                }
                else
                {
                    SetPropertyValue(parentInfo,this,values[i]);
                }
            }
        }
        /// <summary>
        /// 设置属性值
        /// </summary>
        /// <param name="p">要赋值的属性</param>
        /// <param name="obj">属性所在对象</param>
        /// <param name="val">属性值</param>
        private void SetPropertyValue(PropertyInfo p,object obj,string val)
        {
            if(p != null && 
                (p.PropertyType == typeof(int) || 
                p.PropertyType == typeof(string)))
            {
                if(Globals.IsInt(val))
                    p.SetValue(obj,int.Parse(val),null);
                else
                    p.SetValue(obj,val,null);
            }
        }
    }
}