studentwebpatr.cs

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namespace Stu.Student
{
    using System;
    using System.Web;
    using System.Web.Security;
    using System.Security.Permissions;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Web.UI.WebControls.WebParts;
    using System.Data.SqlClient;
    [AspNetHostingPermission(SecurityAction.Demand,
  Level = AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand,
      Level = AspNetHostingPermissionLevel.Minimal)]
    public class StudentWebPatr : WebPart, INamingContainer
    {

        // 定义构造函数

        public StudentWebPatr()
        {
            this.Title = "通信订阅者";
        }
        // 定义私有变量
        private int _stuID;
        private GridView gvinfo;
        private SqlDataSource stuSql;
        protected override void RenderContents(HtmlTextWriter writer)
        {
            if (_stuID < 1)
            {
                writer.Write("<span style='color:gray'>请在文本框中输入大于等于1的值.</span>");
                return;
            }
            else
            {
                stuSql = new SqlDataSource();
                stuSql.ID = "sqlDatasource1";
                stuSql.ConnectionString = "Data Source=a\\mr;Initial Catalog=aspnetdb;Integrated Security=True";
                stuSql.SelectCommand = "select * from tb_03 where 学生编号=" + _stuID.ToString();
                Controls.Add(stuSql);
                gvinfo = new GridView();
                gvinfo.DataSourceID = "sqlDatasource1";
                gvinfo.CellPadding = 3;
                gvinfo.GridLines = GridLines.None;
                Controls.Add(gvinfo);
                gvinfo.RenderControl(writer);
            }
        }
        // 实现从IStuInfo接口定义的属性中获取数据
        [ConnectionConsumer("IStuInfoConsumer", "IStuInfoConsumer")]
        public void GetEmployeeInfo(IStuInfo StuInfo)
        {
            if (StuInfo != null)
            {
                _stuID = StuInfo.stuId;
            }
            else
            {
                throw new NotSupportedException("未能连接Sql数据库.");
            }
        }
    }
    }