服务器控件动态添加行，并获取值

Question

在原有table的基础上添加行，点击按钮添加一新行。怎么获取新添加行里面textbox中的值？我下面的代码只能添加一行，每次点击都只有一行。   前台代码：
<table runat="server" id="tabOperate" visible="true" style="width: 400px; text-align: center;">
       <tr style="background-color: #CBCBCB; height: 30px;">
             <td colspan="3">
                   若要新增一行請單擊--> <asp:ImageButton runat="server" ID="imgBtnAdd" ImageUrl="~/Images/add.gif" OnClick="imgBtnAdd_Click" />
              </td>
        </tr>
        <tr style="background-color: #A9A9A9; height: 26px;">
              <td style="width: 120px;">
                     LOB
              </td>
              <td>
                    Category
              </td>
              <td>
                    周數據
              </td>
         </tr>
</table>后台代码：
        protected void imgBtnAdd_Click(object sender, ImageClickEventArgs e)
        {             
            HtmlTableRow tr1 = new HtmlTableRow();
            HtmlTableCell td1 = new HtmlTableCell();
            HtmlTableCell td2 = new HtmlTableCell();
            HtmlTableCell td3 = new HtmlTableCell();
            TextBox txt1 = new TextBox();
            txt1.Text = "";
            txt1.ID = "tbLob" + tabOperate.Rows.Count;            TextBox txt2 = new TextBox();
            txt2.Text = "";
            txt2.ID = "tbCategory" + tabOperate.Rows.Count;            TextBox txt3 = new TextBox();
            txt3.Text = "";
            txt3.ID = "tbData" + tabOperate.Rows.Count;            td1.Controls.Add(txt1);
            td2.Controls.Add(txt2);
            td3.Controls.Add(txt3);
            tr1.Cells.Add(td1);
            tr1.Cells.Add(td2);
            tr1.Cells.Add(td3);
            tabOperate.Rows.Insert(tabOperate.Rows.Count, tr1);            
        }

Answer 1

1、给textbox添加焦点事件  失去或得到时触发
比如txt3.Attributes.Add("onfocus", "javascript:Change('" + txtbox.ID + "');");
 function ChangeText(id) {
            value = document.getElementById("" + id + "").value;
}
2、根据你生成textbox规律遍历所有我也只想到这么点 不知道对你有没有帮助

Answer 2

        <table runat="server" id="tabOperate" border="1" visible="true" style="width: 400px; text-align: center;">
            <tr style="height: 30px;">
                <td colspan="3">
                    若要新增一行请单击-->
                    <asp:Button ID="btnAdd" runat="server" Text="添加" onclick="btnAdd_Click" />
                </td>
            </tr>
            <tr style="height: 26px;">
                <td style="width: 120px;">
                    LOB
                </td>
                <td>
                    Category
                </td>
                <td>
                    周数据
                </td>
            </tr>
        </table>
    protected void btnAdd_Click(object sender, EventArgs e)
    {
        int rows = ViewState["Count"] == null ? 1 : Convert.ToInt32(ViewState["Count"]);
        for (int i = 0; i < rows; i++)
        {
            HtmlTableRow tr1 = new HtmlTableRow();
            HtmlTableCell td1 = new HtmlTableCell();
            HtmlTableCell td2 = new HtmlTableCell();
            HtmlTableCell td3 = new HtmlTableCell();
            TextBox txt1 = new TextBox();
            txt1.Text = "";
            txt1.ID = "tbLob" + tabOperate.Rows.Count;            TextBox txt2 = new TextBox();
            txt2.Text = "";
            txt2.ID = "tbCategory" + tabOperate.Rows.Count;            TextBox txt3 = new TextBox();
            txt3.Text = "";
            txt3.ID = "tbData" + tabOperate.Rows.Count;            td1.Controls.Add(txt1);
            td2.Controls.Add(txt2);
            td3.Controls.Add(txt3);
            tr1.Cells.Add(td1);
            tr1.Cells.Add(td2);
            tr1.Cells.Add(td3);
            tabOperate.Rows.Insert(tabOperate.Rows.Count, tr1);
        }        rows = rows + 1;
        ViewState["Count"] = rows;    }