如何获得Row＆amp; Gridview中选择单元格的Col索引

Question

我有一个gridview，其中我动态添加了几个文本框，如下面的代码所示：

protected void getDateControls()
{
    foreach (GridViewRow grow in gdView.Rows)
    {
        System.Web.UI.WebControls.TextBox txtFrom = new System.Web.UI.WebControls.TextBox();
        txtFrom.ID = "txtFrom";
        txtFrom.Width = 70;
        txtFrom.AutoPostBack = true;
        txtFrom.TextChanged += new System.EventHandler(this.txtFrom_Changed);
        grow.Cells[5].Controls.Add(txtFrom);

        System.Web.UI.WebControls.TextBox txtTo = new System.Web.UI.WebControls.TextBox();
        txtTo.ID = "txtTo";
        txtTo.Width = 70;
        txtTo.AutoPostBack = true;
        txtTo.TextChanged += new System.EventHandler(this.txtTo_Changed);
        grow.Cells[6].Controls.Add(txtTo);
    }
}

我还有jquery函数，当这些文本框获得焦点时会触发datepicker，如下所示：

<script type="text/javascript">
    $(document).ready(function() {
    $(document).on("focus", "input[id*='txtFrom']", function() {
        $(this).datepicker({
            //appendText:'mm/dd/yyyy',
            //showOn: 'both',
            //buttonText: '..',
            dateFormat: 'dd/mm/yy',
            //numberOfMonths:2,
            changeMonth: true,
            changeYear: true,
            minDate: new Date(2017, 4, 1),
            maxDate: new Date(2025, 3, 31)
        });
    });
        $(document).on("focus", "input[id*='txtTo']", function() { $(this).datepicker({
            //appendText:'mm/dd/yyyy',
            //showOn: 'both',
            //buttonText: '..',
            dateFormat: 'dd/mm/yy',
            //numberOfMonths:2,
            changeMonth: true,
            changeYear: true,
            minDate: new Date(2017, 4, 1),
            maxDate: new Date(2025, 3, 31) 
            });
    });
});

现在我想得到一排＆amp;文本框具有焦点的单元格的col索引。怎么做？请帮忙。

感谢大家的期待。