aspx文件中代码：
    <div>    
        <asp:Table ID="MyTable" runat="server">            
        </asp:Table>
        <asp:Button ID="Button1" runat="server" Text="Button" onclick="Button1_Click" />
    </div>

aspx.cs文件中代码：
 protected void Page_Load(object sender, EventArgs e)
        {
            
                int rows = 15;//15层
                int columns = 15;//单层15房屋
                Response.Write("Load:" + MyTable.Rows.Count);
                TableHeaderRow tr0 = new TableHeaderRow();//第0行展示房间序号
                tr0.TableSection = TableRowSection.TableHeader;//添加<thead></thead>
                //首列显示“楼层”
                TableHeaderCell tdFirst = new TableHeaderCell();
                //tdFirst.Text = "楼层";
                //tdFirst.CssClass = "tabNothouse";
                Label lbl0 = new Label();
                lbl0.Text = "楼层";
                lbl0.Width = new Unit("50px");
                //lbl0.CssClass = "tabNothouse";
                tdFirst.Controls.Add(lbl0);
                tr0.Cells.Add(tdFirst);
                for (int K = columns; K >= 1; K--)
                {
                    TableHeaderCell td = new TableHeaderCell();
                    td.Text = K.ToString();
                    TextBox txt = new TextBox();
                    txt.Width = new Unit("50px");
                    td.Controls.Add(txt);
                    //td.CssClass = "tabNothouse";
                    tr0.Cells.Add(td);

                }
                // mythead.Controls.Add(tr0);
                Literal theadStart = new Literal();
                theadStart.Text = "<thead>";
                //MyTable.Controls.Add(theadStart);
                MyTable.Rows.Add(tr0);
                //Literal theadEnd = new Literal();
                //theadEnd.Text = "</thead>";
                //MyTable.Controls.Add(theadEnd);

                for (int i = rows; i >= 1; i--)
                {
                    TableRow tr = new TableRow();
                    TableCell td001 = new TableCell();
                    //td001.Text = i.ToString() + "层";
                    Label lbl001 = new Label();
                    lbl001.Text = i.ToString() + "层";
                    lbl001.Width = new Unit("50px");
                    lbl001.CssClass = "tabNothouse";
                    td001.Controls.Add(lbl001);
                    //td001.CssClass = "tabNothouse";              
                    tr.Cells.Add(td001);
                    for (int j = columns; j >= 1; j--)
                    {
                        TableCell td = new TableCell();
                        td.Text = i.ToString() + j.ToString();
                        //td.CssClass = "tabCss";
                        TextBox txt = new TextBox();
                        //txt.Width = new Unit("50px");
                        txt.CssClass = "tabCss";
                        td.Controls.Add(txt);
                        tr.Cells.Add(td);
                    }
                    MyTable.Rows.Add(tr);
                }
            
        }




 protected void Button1_Click(object sender, EventArgs e)
        {
            List<string[]> List = new List<string[]>();
            int n = MyTable.Rows.Count;
            Response.Write("n="+n.ToString());
            for (int i = 1; i <= 5;i++ )
            {
                string[] strs = new string[5];
                TableRow tr = MyTable.Rows[i];
                for (int j = 1; j <= 5;j++ )
                {
                    TableCell td = tr.Cells[j];
                    TextBox txt = (TextBox)td.Controls[0];//★？？设断点得知在这里获得的文本框的值为用户输入的值，可是该文本框不是刚刚跟随table在Page_Load(){}重新被创建的吗，什么时候被赋了这个值呢？？★                    
                    strs[j-1] = txt.Text.Trim();
                }
                List.Add(strs);
            }

            List<string[]> List2 = List;
        }