Selenium - 如何计算表中的行数？

我有一个包含“n”行的表。我需要计算它们，该怎么做？

示例：- 我的表格如下所示。

Type        Balance Date received       Date returned   Payment method  Amount
General     Default 10/01/2013 08:53:20                 Cash            $ 10.00

HTML of my table looks like this. <th> is table title row and <td> are the entries done by the user. Everytime the user add the new entry, the count will increase and display a message "3 found for account 6478 ". where 3 is no of rows in the table.   
<fieldset>
<table id="listBalances" class="listTable" width="100%">
<thead>
<tr>
<th>Type</th>
<th>Balance</th>
<th>Date received</th>
<th>Date returned</th>
<th>Payment method</th>
<th>Amount</th>
</tr>
</thead>
<tbody>
<tr>
<tr class="alt">
<td>General Deposit</td>
<td>Default for RTB</td>
<td>09/30/2013 06:58:41</td>
<td/>
<td>Cash</td>
<td>$ 5.00</td>

要将行数存储到表中，您可以使用storeXpathCount

storeXpathCount | id=listBalances | NumberOfRows
echo  | ${NumberOfRows}

storeXpathCount 将行数存储到变量 NumberOfRows 中 echo 将返回计数。