foreach (Control c in this.rptTables.Controls)
{
    CheckBox cbx = (CheckBox)c.FindControl("cbxId");
    TextBox tbx = (TextBox)c.FindControl("tbxTableName");
    if (cbx != null)
    {
        if (cbx.Checked == true)
        {
            common.salert(tbx.Text);
        }

    }
}

2、
for (int i = 0; i < this.rptTables.Items.Count; i++)
{
    CheckBox cbx = (CheckBox)rptTables.Items[i].FindControl("cbxId");
    TextBox tbx = (TextBox)rptTables.Items[i].FindControl("tbxTableName");
    if (cbx != null)
    {
            if (cbx.Checked)
            {
                common.salert(tbx.Text);
            }

    }
}
关键点：在每行再写个隐藏的控件我是用TextBox，代码如下：