複合控件的成功典范！！！(修正)

using  System;
using  System.Web.UI;
using  System.Web.UI.WebControls;
using  System.ComponentModel;
using  System.Drawing;

namespace  CreateTech.Retail.ServerControl
{
    [DefaultProperty( " Text " )]
    [ToolboxData( " <{0}:BaseDataSelecter runat=\"server\"></{0}:BaseDataSelecter> " )]
     public   class  BaseDataSelecter : WebControl
    {
         private  System.Web.UI.WebControls.HiddenField _hiddenField = new  HiddenField();
         private  System.Web.UI.WebControls.TextBox _textBoxCode = new  TextBox();
         private  System.Web.UI.WebControls.TextBox _textBoxName = new  TextBox();

        [Browsable( false )]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         // 复合控件中隱藏文本框的ClientID
         public   string  HiddenFieldClientID
        {
             get
            {
                EnsureChildControls();
                 return  _hiddenField.ClientID;
            }
        }

        [Browsable( false )]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         // 复合控件中CODE文本框的ClientID
         public   string  TextBoxCodeClientID
        {
             get
            {
                EnsureChildControls();
                 return  _textBoxCode.ClientID;
            }
        }

        [Browsable( false )]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         // 复合控件中Name文本框的ClientID
         public   string  TextBoxNameClientID
        {
             get
            {
                EnsureChildControls();
                 return  _textBoxName.ClientID;
            }
        }

         public   override  ControlCollection Controls
        {
             get
            {
                EnsureChildControls();
                 return   base .Controls;
            }
        }

        [Category( " Appearance " )]
        [DefaultValue( "" )]
         public   string  Text
        {
             get
            {
                EnsureChildControls();
                 return  ViewState[ " Text " ]  ==   null   ?  _hiddenField.Value : ViewState[ " Text " ].ToString();
            }
             set
            {
                EnsureChildControls();
                ViewState[ " Text " ]  =  value;
            }
        }

        [Browsable( false )]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         // 复合控件中隱藏文本框的ID
         public   string  HiddenFieldID 
        {
             get
            {
                EnsureChildControls();
                 return   " hid " + this .FieldName + " Id " ;
            }
        }

        [Browsable( false )]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         // 复合控件中CODE文本框的ID
         public   string  TextBoxCodeID
        {
             get
            {
                EnsureChildControls();
                 return   " txt "   +   this .FieldName  +   " Code " ;
            }
        }

        [Browsable( false )]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)]
         // 复合控件中Name文本框的ID
         public   string  TextBoxNameID
        {
             get
            {
                EnsureChildControls();
                 return   " txt "   +   this .FieldName  +   " Name " ;
            }
        }

         private   string  _FieldName  =   "" ;
        [Bindable( true )]
        [Category( " Appearance " )]
        [DefaultValue( "" )]
        [Localizable( true )]
        [Description( " 用於生成ID的特定字符串 " )]
         public   string  FieldName
        {
             get  
            {
                EnsureChildControls();
                 return  _FieldName;
            }
             set
            {
                EnsureChildControls();
                _FieldName  =  value;
            }
        }

         private   string  _BaseDataType  =   "" ;
        [Bindable( true )]
        [Category( " Appearance " )]
        [DefaultValue( "" )]
        [Localizable( true )]
        [Description( " 基礎資料的類型 " )]
         public   string  BaseDataType
        {
             get
            {
                EnsureChildControls();
                 return  _BaseDataType;
            }
             set
            {
                EnsureChildControls();
                _BaseDataType  =  value;
            }
        }

         private   string  _BaseDataUrl  =   "" ;
        [Bindable( true )]
        [Category( " Appearance " )]
        [DefaultValue( "" )]
        [Localizable( true )]
        [Description( " 選擇基礎資料的頁面地址 " )]
         public   string  BaseDataUrl
        {
             get
            {
                EnsureChildControls();
                 return  _BaseDataUrl;
            }
             set
            {
                EnsureChildControls();
                _BaseDataUrl  =  value;
            }
        }

         private   string  _BaseDataID  =   "" ;
        [Bindable( true )]
        [Category( " Appearance " )]
        [DefaultValue( "" )]
        [Localizable( true )]
        [Description( " 基礎資料的ID " )]
         public   string  BaseDataID
        {
             get
            {
                EnsureChildControls();
                 if  (_BaseDataID  !=   "" )
                {
                     return  _BaseDataID;
                }
                 else
                {
                     return  _hiddenField.Value;
                }
            }
             set
            {
                EnsureChildControls();
                _BaseDataID  =  value;
            }
        }

         private   string  _BaseDataCode  =   "" ;
        [Bindable( true )]
        [Category( " Appearance " )]
        [DefaultValue( "" )]
        [Localizable( true )]
        [Description( " 基礎資料的Code " )]
         public   string  BaseDataCode
        {
             get
            {
                EnsureChildControls();
                 if  (_BaseDataCode  !=   "" )
                {
                     return  _BaseDataCode;
                }
                 else
                {
                     return  _textBoxCode.Text;
                }
            }
             set
            {
                EnsureChildControls();
                _BaseDataCode  =  value;
            }
        }

         private   string  _BaseDataName  =   "" ;
        [Bindable( true )]
        [Category( " Appearance " )]
        [DefaultValue( "" )]
        [Localizable( true )]
        [Description( " 基礎資料的Code " )]
         public   string  BaseDataName
        {
             get
            {
                EnsureChildControls();
                 if  (_BaseDataName  !=   "" )
                {
                     return  _BaseDataName;
                }
                 else
                {
                     return  _textBoxName.Text;
                }
            }
             set
            {
                EnsureChildControls();
                _BaseDataName  =  value;
            }
        }

         protected   override   void  CreateChildControls()
        {
            Controls.Clear();
             // _hiddenField = new HiddenField();
            _hiddenField.ValueChanged  +=   new  EventHandler(_hiddenField_ValueChanged);
             // _textBoxCode = new TextBox();
            _textBoxCode.TextChanged  +=   new  EventHandler(_hiddenField_ValueChanged);
             // _textBoxName = new TextBox();
             // _hiddenField.ID = HiddenFieldID;
             // _textBoxCode.ID = TextBoxCodeID;
            _textBoxCode.BackColor  =  ColorTranslator.FromHtml( " #F0F0F0 " );
            _textBoxCode.Attributes.Add( " disabled " ,  " disabled " );
            _textBoxCode.Width  =  Unit.Parse( " 48px " );
            _textBoxCode.Height  =  Unit.Parse( " 15px " );
            _textBoxCode.BorderWidth  =  Unit.Parse( " 0px " );
             // _textBoxName.ID = TextBoxNameID;
            _textBoxName.BackColor  =  ColorTranslator.FromHtml( " #F0F0F0 " );
            _textBoxName.Attributes.Add( " disabled " ,  " disabled " );
            _textBoxName.Width  =  Unit.Parse( " 120px " );
            _textBoxName.BorderWidth  =  Unit.Parse( " 0px " );
            Controls.Add(_hiddenField);
            Controls.Add(_textBoxCode);
            Controls.Add(_textBoxName);
        }

         private   void  _hiddenField_ValueChanged( object  sender, EventArgs e)
        {
            BaseDataID  =  _hiddenField.Value;
        }

         protected   override   void  OnInit(EventArgs e)
        {
             base .OnInit(e);
            _hiddenField.ID  =  HiddenFieldID;
            _textBoxName.ID  =  TextBoxNameID;
            _textBoxCode.ID  =  TextBoxCodeID;
        }

         ///
         ///  将此控件呈现给指定的输出参数。
         ///
         ///  要写出到的 HTML 编写器
         protected   override   void  Render(HtmlTextWriter output)
        {
            EnsureChildControls();
            output.AddAttribute(HtmlTextWriterAttribute.Cellspacing,  " 0 " );
            output.AddAttribute(HtmlTextWriterAttribute.Cellpadding,  " 0 " );
            output.AddAttribute(HtmlTextWriterAttribute.Border, " 0 " );
            output.AddAttribute(HtmlTextWriterAttribute.Style,  " border:solid 1px #AECAF0;border-collapse:collapse; background:#F0F0F0; " );

            output.RenderBeginTag(HtmlTextWriterTag.Table);

            output.RenderBeginTag(HtmlTextWriterTag.Tr);

            output.AddStyleAttribute(HtmlTextWriterStyle.BorderWidth,  " 0px " );
            output.RenderBeginTag(HtmlTextWriterTag.Td);
             // _hiddenField.ID = HiddenFieldID;
             // _hiddenField.Value = BaseDataID;
             // _textBoxCode.ID = TextBoxCodeID;
             // _textBoxCode.Text = BaseDataCode;
            _hiddenField.RenderControl(output);
            _textBoxCode.RenderControl(output);
            output.RenderEndTag();

            output.AddAttribute(HtmlTextWriterAttribute.Style,  " border-left:solid 1px #AECAF0; border-right:solid 1px #AECAF0; background:#D4D4D4; " );
            output.RenderBeginTag(HtmlTextWriterTag.Td);

             // output.AddAttribute(HtmlTextWriterAttribute.Id, "xxx"+HiddenFieldID);
            output.AddAttribute(HtmlTextWriterAttribute.Src,  this .Page.ClientScript.GetWebResourceUrl( this .GetType(),  " CreateTech.Retail.ServerControl.Resources.base_data_select.jpg " ));
            output.AddAttribute(HtmlTextWriterAttribute.Style,  " border:0px; width:20px; height:20px; cursor:pointer; " );
            output.AddAttribute(HtmlTextWriterAttribute.Onclick,  " if(typeof(popupURL)!=\"undefined\"){popupURL.SetContentHTML('');popupURL.SetContentUrl(' "   +  BaseDataUrl  +   " ?id= " + HiddenFieldClientID + " &code= " + TextBoxCodeClientID + " &name= " + TextBoxNameClientID + " &t= "   +  BaseDataType  +   " &sid= "   +  FieldName  +   " &v='+(new Date()).getTime());popupURL.Show();} " );
            output.RenderBeginTag(HtmlTextWriterTag.Img);
            output.RenderEndTag();
            output.RenderEndTag();

            output.AddStyleAttribute(HtmlTextWriterStyle.BorderWidth,  " 0px " );
            output.RenderBeginTag(HtmlTextWriterTag.Td);
             // _textBoxName.ID = TextBoxNameID;
            _textBoxName.Text  =  BaseDataName;
            _textBoxName.RenderControl(output);
            output.RenderEndTag();

            output.RenderEndTag();

            output.RenderEndTag();
        }
    }
}

< cc1:BaseDataSelecter ID = " txtBrand "  runat = " server "  FieldName = " Brand "  BaseDataType = " 10000 "  BaseDataUrl = " PopupControl/SelectBaseData.aspx "   />

<% @ Register Assembly = " CreateTech.Retail.ServerControl "  Namespace = " CreateTech.Retail.ServerControl "
    TagPrefix = " cc1 "   %>