蛙蛙推荐:第一个实际应用中开发的自定义web服务器控件

自定义服务器控件ViewSuo的源文件
 using System;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.Collections;
using System.Diagnostics;
using System.Data;
using System.Drawing;

 namespace oa.cls
{

      /// <summary>
     /// 查看事务所详细信息的自定义服务器控件
     /// </summary>
     [ToolboxData("<{0}:ViewSuo runat=server></{0}:ViewSuo>")]
     public class ViewSuo : System.Web.UI.WebControls.WebControl, INamingContainer
     {
         private DataSet dataSource;

          /// <summary>
         /// 设置数据源
         /// </summary>
         [Bindable(true),
         Category("Data"),
         DefaultValue(null),
         Description("设置数据源"),
         DesignerSerializationVisibility(DesignerSerializationVisibility.Hidden)
         ]
         public DataSet DataSource
         {
              get
              {
                   return dataSource;
              }
              set
              {
                   dataSource = value;
              }
         }

           protected override void Render(HtmlTextWriter output)
         {
              PrepareControlHierarchy();
              RenderContents(output);
         }

          private void PrepareControlHierarchy()
         {
              if (HasControls() == false)
                   return;
         }

          protected override void CreateChildControls() 
         {
              Controls.Clear();
              if (Page.IsPostBack)
                   CreateControlHierarchy(false);
         }

          public override void DataBind()
         {
              base.OnDataBinding(EventArgs.Empty);
              Controls.Clear();
              ClearChildViewState();

               CreateControlHierarchy(true);
              ChildControlsCreated = true;
         }

          protected override void TrackViewState()
         {
              base.TrackViewState();
         }

          /// <summary>
         /// 这里是主要实现输出的方法,用DataList来完成输出,模板SuoTemplate是详细实现细节.
         /// 其它部分都可以套用,自定义的属性都在这里设置,比如说DataList显示的列数,宽,高等.
         /// </summary>
          /// <param name="useDataSource"></param>
         private void CreateControlHierarchy( bool useDataSource )
         {            
              DataList dl = new DataList();
              dl.RepeatColumns = 1;
              dl.RepeatDirection = RepeatDirection.Vertical;
              dl.ID = "productList";
              dl.ItemTemplate = new SuoTemplate();
              dl.ItemStyle.Width = new Unit(500, UnitType.Pixel);
              dl.Width = new Unit(650, UnitType.Pixel);
              Controls.Add( dl );             

               if (useDataSource == true )
              {
                   dl.DataSource = dataSource.Tables[0];
                   dl.DataBind();
              }
         }
     }
}

 
ViewSuo控件中用到的SuoTemplate模板的源文件
 using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.ComponentModel;
using System.Collections;
using System.Diagnostics;
using System.Data;
using System.Drawing;
using System.Text;

 namespace oa.cls
{

      public class SuoTemplate : ITemplate
     {
         public SuoTemplate() { }

          public void InstantiateIn( Control container )
         {
              Literal l = new Literal();
              l.DataBinding += new EventHandler(this.BindData);
              container.Controls.Add( l );
         }

          /// <summary>
         /// 在这个方法里控制模板的主要输出,其中用到了数据绑定的一些内容
         /// 要改变显示在这里修改
         /// </summary>
         /// <param name="sender"></param>
         /// <param name="e"></param>
         public void BindData( object sender, EventArgs e)
         {
              Literal l = (Literal)sender;
              DataListItem container = (DataListItem)l.NamingContainer;
              DataRowView currentRowView = (DataRowView) container.DataItem;

               //HttpContext ht = HttpContext.Current;

               StringBuilder sb = new StringBuilder();
              sb.Append("<table width=/"100%/"  border=/"0/" align=/"center/">");
              sb.Append("  <tr>");
              sb.Append("    <td width=/"17%/" align=/"right/"><strong>事务所名称:</strong></td>");
              sb.Append("    <td width=/"26%/">"+currentRowView["name"]+"</td>");
              sb.Append("    <td width=/"19%/" align=/"right/"><strong>主任:</strong></td>");
              sb.Append("    <td width=/"38%/">"+currentRowView["zhuren"]+"</td>");
              sb.Append("  </tr>");
              sb.Append("  <tr>");
              sb.Append("    <td align=/"right/"><strong>许可证号:</strong></td>");
              sb.Append("    <td>"+currentRowView["zhiye"]+"</td>");
              sb.Append("    <td align=/"right/"><strong>编    制:</strong></td>");
              sb.Append("    <td>"+currentRowView["bianzhi"]+"</td>");
              sb.Append("  </tr>");
              sb.Append("  <tr>");
              sb.Append("    <td align=/"right/"><strong>组织形式:</strong></td>");
              sb.Append("    <td>"+currentRowView["zuzhi"]+"</td>");
              sb.Append("    <td align=/"right/"><strong>隶属关系:</strong></td>");
              sb.Append("    <td>"+currentRowView["lishu"]+"</td>");
              sb.Append("  </tr>");
              sb.Append("  <tr>");
              sb.Append("    <td align=/"right/"><strong>主管机关:</strong></td>");
              sb.Append("    <td>"+currentRowView["zhuguan"]+"</td>");
              sb.Append("    <td align=/"right/"><strong>年    检:</strong></td>");
              sb.Append("    <td>"+currentRowView["nianshen"]+"</td>");
              sb.Append("  </tr>");
              sb.Append("</table>");
              sb.Append("<table width=/"100%/"  border=/"0/" align=/"center/">");
              sb.Append("  <tr>");
              sb.Append("    <td width=/"17%/" align=/"right/"><strong>设立时间:</strong></td>");
              sb.Append("    <td width=/"26%/">"+currentRowView["sheli"]+"</td>");
              sb.Append("    <td width=/"19%/" align=/"right/"><strong>区    域:</strong></td>");
              sb.Append("    <td width=/"38%/">"+currentRowView["quyu"]+"</td>");
              sb.Append("  </tr>");
              sb.Append("  <tr>");
              sb.Append("    <td height=/"16/" align=/"right/"><strong>律    师:</strong></td>");
              sb.Append("    <td>"+currentRowView["lvshi"]+"</td>");
              sb.Append("    <td align=/"right/"><strong>电    话:</strong></td>");
              sb.Append("    <td>"+currentRowView["phone"]+"</td>");
              sb.Append("  </tr>");
              sb.Append("  <tr>");
              sb.Append("    <td align=/"right/"><strong>律师助理:</strong></td>");
              sb.Append("    <td> </td>");
              sb.Append("    <td align=/"right/"><strong>传    真:</strong></td>");
              sb.Append("    <td>"+currentRowView["zhuli"]+"</td>");
              sb.Append("  </tr>");
              sb.Append("  <tr>");
              sb.Append("    <td align=/"right/"><strong>行政人员:</strong></td>");
              sb.Append("    <td>"+currentRowView["xingzheng"]+"</td>");
              sb.Append("    <td align=/"right/"><strong>网    址:</strong></td>");
              sb.Append("    <td>"+currentRowView["huji"]+"</td>");
              sb.Append("  </tr>");
              sb.Append("  <tr>");
              sb.Append("    <td align=/"right/"><strong>专业资格:</strong></td>");
              sb.Append("    <td>"+currentRowView["zige"]+"</td>");
              sb.Append("    <td align=/"right/"><strong>主任手机:</strong></td>");
              sb.Append("    <td>"+currentRowView["shouji"]+"</td>");
              sb.Append("  </tr>");
              sb.Append("  <tr>");
              sb.Append("    <td align=/"right/"><strong>固定资产:</strong></td>");
              sb.Append("    <td>"+currentRowView["zichan"]+"</td>");
              sb.Append("    <td align=/"right/"><strong>邮    编:</strong></td>");
              sb.Append("    <td>"+currentRowView["zip"]+"</td>");
              sb.Append("  </tr>");
              sb.Append("  <tr>");
              sb.Append("    <td align=/"right/"><strong>经    费:</strong></td>");
              sb.Append("    <td>"+currentRowView["jingfei"]+"</td>");
              sb.Append("    <td align=/"right/"><strong>地    址:</strong></td>");
              sb.Append("    <td>"+currentRowView["dizhi"]+"</td>");
              sb.Append("  </tr>");
              sb.Append("  <tr>");
              sb.Append("   <td align=/"right/"><strong>分所情况:</strong></td>");
              sb.Append("   <td colspan=/"3/">"+currentRowView["fensuo"]+"</td>");
              sb.Append("  </tr>");
              sb.Append("</table>");
              l.Text = sb.ToString();
         }
     }
    
}

 测试自定义控件的前台页代码

 <%@ Page language="c#" Codebehind="0.aspx.cs" AutoEventWireup="false" Inherits="oa._0" %>
<%@ Register TagPrefix="wawa" Namespace="oa.cls" Assembly="oa"%>
<!--在使用自定义控件前需要先用Register关键字注册,Assembly属性设置应用程序的名字就可以,就是BIN目录下的那个主DLL的名字->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
       <HEAD>
              <title>0</title>
              <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1">
              <meta name="CODE_LANGUAGE" Content="C#">
              <meta name="vs_defaultClientScript" content="JavaScript">
              <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5">
       </HEAD>
       <body MS_POSITIONING="FlowLayout">
              <form id="Form1" method="post" runat="server">
              <!--在这里放置一个自定义控件-->
                     <wawa:ViewSuo id="suo1" runat="server" />
              </form>
       </body>
</HTML>
 页面后台代码

using System;using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

 namespace oa
{

      public class _0 : System.Web.UI.Page
     {
         protected oa.cls.ViewSuo suo1;
         private void Page_Load(object sender, System.EventArgs e)
         {
              if(!this.IsPostBack)
              {
                   //为自定义web控件设置数据源并绑定数据
                   suo1.DataSource=oa.cls.globalstate.GetDataSetByStr("select top 1 * from suo",null);
                   suo1.DataBind();
              }
         }

          #region Web 窗体设计器生成的代码
         override protected void OnInit(EventArgs e)
         {

               InitializeComponent();
              base.OnInit(e);
         }
        
         private void InitializeComponent()
         {   
              this.Load += new System.EventHandler(this.Page_Load);

          }
         #endregion
     }
}