Asp.net_自定义控件2_自动完成扩展_增加选中事件

.net 3.5+VS 2008

 

页面：AutoCompleted.ascx

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="AutoCompleted.ascx.cs"
    Inherits="ExpenseManager.Common.Controls.AutoCompleted" %>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<asp:TextBox ID="txtInput" runat="server"></asp:TextBox>
<div id="listPlacement" runat="server" style="height: 150px; overflow: auto; display: none;">
</div>
<input id="txtValue" type="text" runat="server" style="display: none;" />
<div style="display: none;">
<cc1:AutoCompleteExtender ID="txtInput_AutoCompleteExtender" runat="server" DelimiterCharacters=""
    Enabled="True" ServicePath="AjaxHelper.asmx" CompletionSetCount="20" MinimumPrefixLength="2"
    CompletionListElementID="listPlacement" CompletionInterval="200" ServiceMethod="Get"
    TargetControlID="txtInput">
</cc1:AutoCompleteExtender>
</div>

 

代码： AutoCompleted.ascx.cs

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Collections.Generic;

namespace ExpenseManager.Common.Controls
{
    public partial class AutoCompleted : System.Web.UI.UserControl, IPostBackEventHandler
    {
        protected static object SELECTED = new object();

        public event EventHandler<AotoCompletedEventArgs> Selected
        {
            add
            {
                this.Events.AddHandler(SELECTED, value);
            }
            remove
            {
                this.Events.RemoveHandler(SELECTED, value);
            }
        }

        protected void OnSelected(AotoCompletedEventArgs e)
        {
            EventHandler<AotoCompletedEventArgs> temp = this.Events[SELECTED] as EventHandler<AotoCompletedEventArgs>;
            if(temp != null)
                temp(this, e);
        }

        public string ServicePath
        {
            get
            {
                return this.txtInput_AutoCompleteExtender.ServicePath;
            }
            set
            {
                this.txtInput_AutoCompleteExtender.ServicePath = value;
            }
        }

        public string ServiceMethod
        {
            get
            {
                return this.txtInput_AutoCompleteExtender.ServiceMethod;
            }
            set
            {
                this.txtInput_AutoCompleteExtender.ServiceMethod = value;
            }
        }

        public int CompletionInterval
        {
            get
            {
                return this.txtInput_AutoCompleteExtender.CompletionInterval;
            }
            set
            {
                this.txtInput_AutoCompleteExtender.CompletionInterval = value;
            }
        }

        public int CompletionSetCount
        {
            get
            {
                return this.txtInput_AutoCompleteExtender.CompletionSetCount;
            }
            set
            {
                this.txtInput_AutoCompleteExtender.CompletionSetCount = value;
            }
        }

        public virtual void RaisePostBackEvent(string eventArgument)
        {
            AotoCompletedEventArgs e = new AotoCompletedEventArgs();
            e.Data = new KeyValuePair<string, string>(this.txtInput.Text, this.txtValue.Value);
            this.OnSelected(e);
        }

        protected override void OnPreRender(EventArgs e)
        {
            EventHandler<AotoCompletedEventArgs> temp = this.Events[SELECTED] as EventHandler<AotoCompletedEventArgs>;
            string clientFunction = string.Format("{0}OnItemSelected", this.ClientID);
            if(temp != null)
            {
                this.txtInput_AutoCompleteExtender.OnClientItemSelected = clientFunction;
                string script = string.Format(@"function {0}(source, eventArgs)
                        {{
                                document.getElementById('{1}').value=eventArgs.get_value();
                                __doPostBack('{2}','SELECTED');
                        }}", clientFunction, txtValue.ClientID, this.ClientID);

                ScriptManager.RegisterClientScriptBlock(this, this.GetType(), clientFunction, script, true);
            }
        }

        /// <summary>
        /// 合作单位名称绑定
        /// </summary>
        public string CropUnitName
        {
            set
            {
                this.txtInput.Text = value;
            }
        }

        /// <summary>
        /// 合作单位能否编辑
        /// </summary>
        public bool CropUnitEnabled
        {
            set
            {
                this.txtInput.Enabled = value;
            }
        }

        /// <summary>
        /// 控件宽度
        /// </summary>
        public Unit Width
        {
            get
            {
                return this.txtInput.Width;
            }
            set
            {
                this.txtInput.Width = value;
            }
        }
    }

    public class AotoCompletedEventArgs : EventArgs
    {
        public KeyValuePair<string, string> Data
        {
            get;
            set;
        }
    }
}

 

为控件实例添加选中项事件：

        protected void Page_Load(object sender, EventArgs e)
        {
            this.CCDEPaymentUnit.Selected += new EventHandler<ExpenseManager.Common.Controls.AotoCompletedEventArgs>　　　　                  (CCPaymentUnit_Selected);

        }

 

        void CCPaymentUnit_Selected(object sender, ExpenseManager.Common.Controls.AotoCompletedEventArgs e)
        {

                //得到选中项的值
                string strValue = e.Data.Value;
        }