#眉標=ASP.NET
#副標=Inside ASP.NET 2.0
#大標=Controls Model的基礎類別
#作者=文／黃忠成


-----box 程式-----

程式1 建立含有Smart Task的控件
#region Using directives
using System;
using System.Collections.Generic;
using System.Text;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.ComponentModel.Design;
using System.Web.UI.Design;
using System.Web.UI.Design.WebControls;
#endregion

namespace ClassLibrary1{
    public class SCCDesignerActionList : DesignerActionList    {
        private ControlDesigner _designer;
        public bool ShowText        {
            get {
                return ((SimpleDesignerTest)_designer.Component).ShowText;
            }
            Set  {
                ((SimpleDesignerTest)_designer.Component).ShowText = value;
                _designer.UpdateDesignTimeHtml();
            }
        }
        public SCCDesignerActionList(ControlDesigner designer):base()        {
            _designer = designer;
        }
        public void FireShowText()        {
            ShowText = true;
        }
        public void FireHideText()        {
            ShowText = false;
        }
        public override DesignerActionItem[] GetSortedActionItems()        {
            DesignerActionPropertyItem item = 
               new DesignerActionPropertyItem("ShowText", 
                               "Show Text","Appearence");
            DesignerActionMethodItem m_item;
            if (!ShowText)
                m_item = new DesignerActionMethodItem(this, 
　　　　　　　　　　　　　"FireShowText", "Show Text","Actions");
            else
                m_item = new DesignerActionMethodItem(this, "FireHideText", 
                           "Hide Text", "Actions");
            return new DesignerActionItem[] {item,m_item};
        }
    }

    public class SCCControlDesigner : System.Web.UI.Design.ControlDesigner    {
        public SCCControlDesigner() : base()     {   }
        public override DesignerActionListCollection ActionLists        {
            get 
            {
                DesignerActionListCollection actions = 
                       new DesignerActionListCollection();
                actions.AddRange(base.ActionLists);
                actions.Add(new SCCDesignerActionList(this));
                return actions;
            }
        }
    }
    [DesignerAttribute(typeof(SCCControlDesigner), typeof(IDesigner))]
    public class SimpleDesignerTest:WebControl    {      
        public bool ShowText        {
            get {
                object o = ViewState["ShowText"];
                if (o != null)
                    return (bool)o;
                return true;
            }
            set  {
                ViewState["ShowText"] = value;
            }
        }
        protected override void Render(System.Web.UI.HtmlTextWriter writer)        {
            if(ShowText)
                writer.WriteLine("TEST");
        }
        public SimpleDesignerTest()  { }
    }
}
-----end-----

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程式2 SimleTable 控件
#region Using directives
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.ComponentModel;
using System.Web.UI.Design.WebControls;
#endregion

namespace ClassLibrary1
{
    public class SimpleTableDesigner : DataBoundControlDesigner   {
    }
    [Designer(typeof(SimpleTableDesigner))]
    public class SimpleTable:DataBoundControl  {
        private IEnumerable _dataRecs;
        protected override HtmlTextWriterTag TagKey  {
            get {
                return HtmlTextWriterTag.Table;
            }
        }
        protected virtual void RenderHeader()  {
            if (_dataRecs != null)  {
                foreach (object item in _dataRecs)    {
                    HtmlTableRow row = new HtmlTableRow();
                    foreach (PropertyDescriptor prop in TypeDescriptor.GetProperties(item))
                   {
                        HtmlTableCell col = new HtmlTableCell();                        
                        col.Controls.Add(new LiteralControl(prop.Name));
                        row.Controls.Add(col);
                    }
                    Controls.Add(row);
                    break;
                }
            }
        }
        protected virtual void RenderRows()        {
            if (_dataRecs != null) {
                foreach (object item in _dataRecs) {
                    HtmlTableRow row = new HtmlTableRow();
                    foreach (PropertyDescriptor prop in TypeDescriptor.GetProperties(item))
                    {
                        HtmlTableCell col = new HtmlTableCell();
                        object v = prop.GetValue(item);
                        if (v != null)
                            col.Controls.Add(new LiteralControl(v.ToString()));
                        row.Controls.Add(col);
                    }
                    Controls.Add(row);
                }
            }
        }
        private void OnSelectCallBack(IEnumerable data) {
            _dataRecs = data;
        }
        protected void RetrieveData()    {
            DataSourceView view = GetData();
            if(view != null)
                view.Select(DataSourceSelectArguments.Empty,
　　　　　　　　　　 new DataSourceViewSelectCallback(OnSelectCallBack));
        }
        public override void DataBind()        {
            ClearChildControlState();
            Controls.Clear();
            RetrieveData();
            RenderHeader();
            RenderRows();
            ChildControlsCreated = true;
            TrackViewState();
        }
        protected override void OnPreRender(EventArgs e)        {
            if (_dataRecs == null)
                DataBind();
            base.OnPreRender(e);
        }
        public SimpleTable()    {       }
    }
}-----end-----

-----box 程式-----

[NonVisualControl(true)]-----end-----


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程式3
#region Using directives
using System;
using System.Collections.Generic;
using System.Text;
using System.Security.Permissions;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.ComponentModel;
#endregion
namespace ClassLibrary1{    
    public class MySimpleWebPart:WebPart    {
        public override bool AllowEdit        {
            get  {
                return true;
            }
            set   {
                base.AllowEdit = value;
            }
        }
        public string Text        {
            get       {
                object o = ViewState["Text"];
                if (o != null)
                    return (string)o;
                return String.Empty;
            }
            set     {
                ViewState["Text"] = value;
            }
        }
        [WebBrowsable,Personalizable(PersonalizationScope.User)]
        public string TestVeriable        {
            get     {
                return "TEST";
            }
            set { ;}
        }
        [WebBrowsable,Personalizable,Category("Behavior")]
        public string TestVeriable2        {
            get    {
                return "TEST";
            }
            set { ;}
        }

        [ConnectionProvider("provider","provider")]
        public object GetData()        {
            return Text;
        }        
        [ConnectionConsumer("consumer","consumer")]
        public void SetData(object data)        {
            Text = (string)data;
        }
        protected override void RenderContents(HtmlTextWriter writer)        {
            writer.WriteLine(Text);
        }        
        public MySimpleWebPart()    {     }
    }
}-----end-----

-----box 程式-----
程式10 LowcaseTextBox
#region Using directives
using System;
using System.Collections.Generic;
using System.Text;
using System.ComponentModel;
using System.Web.UI;
using System.Web.UI.WebControls;
#endregion
namespace ClassLibrary1{
    public class LowcaseTextBox:TextBox,ICallbackEventHandler {
        private const string SCRIPT =
             "<script language='JavaScript'>\n"+
             "function SetText(eventarg){\n"+
             "document.getElementById('%ID%').value = eventarg;\n"+
             "}</script>";
        public LowcaseTextBox()   {     }
        protected override void AddAttributesToRender(
                           HtmlTextWriter writer)    {
            base.AddAttributesToRender(writer);            
            writer.AddAttribute(
　　　　　　　HtmlTextWriterAttribute.Onchange,
                         Page.GetCallbackEventReference(
　　　　　　　　　　this,ClientID+".value","SetText",null));
        }
        protected override void OnPreRender(EventArgs e)   {
            base.OnPreRender(e);
            Page.ClientScript.RegisterClientScriptBlock(
　　　　　　　　　　GetType(), ClientID,
                            SCRIPT.Replace("%ID%",ClientID));
        }        
        #region ICallbackEventHandler Members
        public string RaiseCallbackEvent(string eventArgument) {
            return eventArgument.ToLower();
        }
        #endregion
    }
}-----end-----