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我有一個表,並有一個未定義的行數,這意味着人們可以添加/刪除行客戶端。我想要做的是當有人在兩個輸入(數量和比率)中輸入新值時,我想做一些加法和乘法並將其作爲總和輸出到頁面。如何使用jQuery來總結表中未定義數量的輸入?
每一行都有數量和比率。每行應該有一個總數=數量*比率。那麼,我想總結總計的所有總數。我希望能夠在用戶輸入他們的信息時做到這一點。這裏的領域是什麼樣子:
<tbody id='line-items'>
<tr class='fields'>
<td><input id="invoice_invoice_line_items_attributes_0__destroy" name="invoice[invoice_line_items_attributes][0][_destroy]" type="hidden" value="false" /><a href="javascript:void(0)" class="remove_nested_fields" data-association="invoice_line_items">X</a></td>
<td><input id="invoice_invoice_line_items_attributes_0_description" label="false" name="invoice[invoice_line_items_attributes][0][description]" size="30" type="text" /></td>
<td><input class="input-mini" id="invoice_invoice_line_items_attributes_0_quantity" label="false" name="invoice[invoice_line_items_attributes][0][quantity]" size="30" type="text" /></td>
<td><input class="input-mini" id="invoice_invoice_line_items_attributes_0_rate" label="false" name="invoice[invoice_line_items_attributes][0][rate]" size="30" type="text" /></td>
</tr>
<tr class='fields'>
<td><input id="invoice_invoice_line_items_attributes_1__destroy" name="invoice[invoice_line_items_attributes][1][_destroy]" type="hidden" value="false" /><a href="javascript:void(0)" class="remove_nested_fields" data-association="invoice_line_items">X</a></td>
<td><input id="invoice_invoice_line_items_attributes_1_description" label="false" name="invoice[invoice_line_items_attributes][1][description]" size="30" type="text" /></td>
<td><input class="input-mini" id="invoice_invoice_line_items_attributes_1_quantity" label="false" name="invoice[invoice_line_items_attributes][1][quantity]" size="30" type="text" /></td>
<td><input class="input-mini" id="invoice_invoice_line_items_attributes_1_rate" label="false" name="invoice[invoice_line_items_attributes][1][rate]" size="30" type="text" /></td>
</tr>
<tr class='fields'>
<td><input id="invoice_invoice_line_items_attributes_2__destroy" name="invoice[invoice_line_items_attributes][2][_destroy]" type="hidden" value="false" /><a href="javascript:void(0)" class="remove_nested_fields" data-association="invoice_line_items">X</a></td>
<td><input id="invoice_invoice_line_items_attributes_2_description" label="false" name="invoice[invoice_line_items_attributes][2][description]" size="30" type="text" /></td>
<td><input class="input-mini" id="invoice_invoice_line_items_attributes_2_quantity" label="false" name="invoice[invoice_line_items_attributes][2][quantity]" size="30" type="text" /></td>
<td><input class="input-mini" id="invoice_invoice_line_items_attributes_2_rate" label="false" name="invoice[invoice_line_items_attributes][2][rate]" size="30" type="text" /></td>
</tr>
</tbody>
我如何去這樣做上使用jQuery行的變量數,然後輸出該頁面?謝謝!
編輯:我就死在試圖找出如何從每一行獲得正確的輸入,像這樣很早就:
$('table input[id^=invoice_invoice_line_items_attributes]')
其抓住所有的行,但我不知道如何跳過在ID中輸入數字並檢查ID的最後一個單詞以確保它是數量或比率。
告訴我們你已經嘗試了什麼,我們不給你寫代碼 – Grumpy 2013-04-03 20:44:45