using System;
using System.Drawing;
using System.Data;
using System.Runtime.InteropServices;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Serialization;
using Microsoft.SharePoint;
using Microsoft.SharePoint.WebControls;
using Microsoft.SharePoint.WebPartPages;

namespace SimpleWebPart
{
    public class WebPartGrid : System.Web.UI.WebControls.WebParts.WebPart
    {
        DataGrid myGrid;

        /// <summary>
        /// 由ASP.NET页面框架调用，以通知使用基于合成的实现的服务器控件创建包含他们的任何子控件，以便为回发发或呈现做准备。
        /// </summary>
        protected override void CreateChildControls()
        {
            myGrid = new DataGrid();
            myGrid.HeaderStyle.Font.Bold = true;
            myGrid.HeaderStyle.HorizontalAlign = HorizontalAlign.Center;
            myGrid.DataSource = GetDataTable();
            myGrid.DataBind();
            Controls.Add(myGrid);
        }

        /// <summary>
        /// 引发 System.Web.UI.Control.PreRender 事件
        /// </summary>
        /// <param name="e"></param>
        protected override void OnPreRender(EventArgs e)
        {
            DataTable dt = GetDataTable();
            myGrid.DataSource = dt;
            myGrid.DataBind();
        }

        /// <summary>
        /// 将控件呈现给指定的HTML编辑器
        /// </summary>
        /// <param name="writer"></param>
        protected override void Render(System.Web.UI.HtmlTextWriter writer)
        {
            this.EnsureChildControls();
            myGrid.RenderControl(writer);
        }

        private DataTable GetDataTable()
        {
            DataTable dt = new DataTable();
            dt.Columns.Add("ID");
            dt.Columns.Add("Name");
            dt.Columns.Add("Date");

            for (int i = 0; i < RowCount; i++)
            {
                DataRow dr = dt.NewRow();
                dr[0] = i;
                dr[1] = StrColumn1Text + ": " + i;
                dr[2] = "Create date :" + DateTime.Now;
                dt.Rows.Add(dr);
            }

            return dt;
        }

        #region

        private int _RowCount = 0;
        private string _StrColumn1Text = string.Empty;

        [Personalizable]//标识一个属性是自定义属性
        [WebBrowsable]//是否显示在属性编辑界面中
        [WebDisplayName("请输入要显示的行数")]//自定义属性的标题说明
        [WebDescription("自定义属性的描述")]//（暂时未发现有什么用处）
        [System.ComponentModel.Category("用户设置")]//属性分组，如果不设置，则显示在杂类中
        public int RowCount
        {
            get
            {
                return _RowCount;
            }
            set
            {
                _RowCount = value;
            }
        }

        [Personalizable]
        [WebBrowsable]
        [WebDisplayName("请输第一列的列名")]
        [System.ComponentModel.Category("用户设置")]
        public string StrColumn1Text
        {
            get
            {
                return _StrColumn1Text;
            }
            set
            {
                _StrColumn1Text = value;
            }
        }

        #endregion

    }
}

<SafeControl Assembly="SimpleWebPart, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" Namespace="SimpleWebPart" TypeName="*" Safe="True" />