protected void Button1_Click(object sender, EventArgs e)
{
    // Iterates through the rows of the GridView control
    foreach (GridViewRow row in GridView1.Rows)
    {
        // Selects the text from the TextBox
        // which is inside the GridViewRow control
 
        string textBoxText = ((TextBox)row.FindControl("TextBox1")).Text;
        Response.Write(textBoxText);
    }
}
[/geshi]
<p></p>
<p>但而家唔再得, 因為個 control 唔再屬於 GridViewRow, 就我所見 GridViewRow 之下既 Control 變晒System.Web.UI.WebControls.DataControlFieldCell, 而 FindControl 唔會再 search 入去, 結果要再搵深多層:</p>
[geshi lang=C]
protected void Button1_Click(object sender, EventArgs e)
{
    // Iterates through the rows of the GridView control
    foreach (GridViewRow row in GridView1.Rows)
    {
        foreach (Control ctrl in row.Controls) 
        {
           // Selects the text from the TextBox
           // which is inside the DataControlFieldCell control of a GridViewRow 
           string textBoxText = ((TextBox)ctrl.FindControl("TextBox1")).Text;
           Response.Write(textBoxText);
        }
    }
}