如何將帶有select和input的HTML表轉換為json並再次返回

Question

我有以下html表，其中的行和列分別包含帶有文本的td，select和input [type ='text']。 每行還有最后一個td，用於從表中刪除行，與將表行另存為json無關，可以忽略。

   <table id="columnsTable" class="table white-table table-bordered table-hover table-striped">
    <thead>
        <tr>
            <th>Column</th>
            <th>Condition</th>
            <th>Value</th>
            <th></th>
        </tr>
    </thead>
    <tbody id="columnsTableBody">
        <tr id="StudentInfo.FirstName" class="StudentInfo.FirstName" name="StudentInfo.FirstName">
            <td>FirstName</td>
            <td>
                <select id="StudentInfo.FirstName-condition">
                    <option value="LIKE">CONTAINS</option>
                    <option value="=">EQUALS</option>
                    <option value="!=">NOT EQUAL</option>
                    <option value="&gt;">GREATER THAN</option>
                    <option value="&lt;">LESS THAN</option>
                    <option value="&gt;=">GREATER THAN OR EQUAL TO</option>
                    <option value="&lt;=">LESS THAN OR EQUAL TO</option>
                </select></td>
            <td>
                <input type="text" id="StudentInfo.FirstName-value" class="required" title="Value is required"></td>
            <td>
                <label>
                    <input type="checkbox" id="StudentInfo.FirstName-checkbox"></label></td>
        </tr>
        <tr id="StudentInfo.LastName" class="StudentInfo.LastName" name="StudentInfo.LastName">
            <td>LastName</td>
            <td>
                <select id="StudentInfo.LastName-condition">
                    <option value="LIKE">CONTAINS</option>
                    <option value="=">EQUALS</option>
                    <option value="!=">NOT EQUAL</option>
                    <option value="&gt;">GREATER THAN</option>
                    <option value="&lt;">LESS THAN</option>
                    <option value="&gt;=">GREATER THAN OR EQUAL TO</option>
                    <option value="&lt;=">LESS THAN OR EQUAL TO</option>
                </select></td>
            <td>
                <input type="text" id="StudentInfo.LastName-value" class="required" title="Value is required"></td>
            <td>
                <label>
                    <input type="checkbox" id="StudentInfo.LastName-checkbox"></label></td>
        </tr>
        <tr id="StudentInfo.CurrentCollege" class="StudentInfo.CurrentCollege" name="StudentInfo.CurrentCollege">
            <td>CurrentCollege</td>
            <td>
                <select id="StudentInfo.CurrentCollege-condition">
                    <option value="LIKE">CONTAINS</option>
                    <option value="=">EQUALS</option>
                    <option value="!=">NOT EQUAL</option>
                    <option value="&gt;">GREATER THAN</option>
                    <option value="&lt;">LESS THAN</option>
                    <option value="&gt;=">GREATER THAN OR EQUAL TO</option>
                    <option value="&lt;=">LESS THAN OR EQUAL TO</option>
                </select></td>
            <td>
                <input type="text" id="StudentInfo.CurrentCollege-value" class="required" title="Value is required"></td>
            <td>
                <label>
                    <input type="checkbox" id="StudentInfo.CurrentCollege-checkbox"></label></td>
        </tr>
        <tr id="StudentInfo.EmailAddress" class="StudentInfo.EmailAddress" name="StudentInfo.EmailAddress">
            <td>EmailAddress</td>
            <td>
                <select id="StudentInfo.EmailAddress-condition">
                    <option value="LIKE">CONTAINS</option>
                    <option value="=">EQUALS</option>
                    <option value="!=">NOT EQUAL</option>
                    <option value="&gt;">GREATER THAN</option>
                    <option value="&lt;">LESS THAN</option>
                    <option value="&gt;=">GREATER THAN OR EQUAL TO</option>
                    <option value="&lt;=">LESS THAN OR EQUAL TO</option>
                </select></td>
            <td>
                <input type="text" id="StudentInfo.EmailAddress-value" class="required" title="Value is required"></td>
            <td>
                <label>
                    <input type="checkbox" id="StudentInfo.EmailAddress-checkbox"></label></td>
        </tr>
        <tr id="StudentInfo.Status" class="StudentInfo.Status" name="StudentInfo.Status">
            <td>Status</td>
            <td>
                <select id="StudentInfo.Status-condition">
                    <option value="LIKE">CONTAINS</option>
                    <option value="=">EQUALS</option>
                    <option value="!=">NOT EQUAL</option>
                    <option value="&gt;">GREATER THAN</option>
                    <option value="&lt;">LESS THAN</option>
                    <option value="&gt;=">GREATER THAN OR EQUAL TO</option>
                    <option value="&lt;=">LESS THAN OR EQUAL TO</option>
                </select></td>
            <td>
                <input type="text" id="StudentInfo.Status-value" class="required" title="Value is required"></td>
            <td>
                <label>
                    <input type="checkbox" id="StudentInfo.Status-checkbox"></label></td>
        </tr>
    </tbody>
</table>

如何以以下格式將行另存為JSON？以便可以循環回它以從JSON重新構建表行。

columns: {
    StudentInfo.FirstName: {
       condition: 'CONTAINS',
       value: 'Carl'
    }
    StudentInfo.LastName: {
        condition: 'EQUALS',
        value: 'W'
    }
}

Answer 1

將其存儲為數組的集合，您可以循環遍歷以重建表html。 這也將減少內存使用。 而且我認為您應該將其重命名為rows而不是columns因為理想情況下它們是表的行。

rows: [
    ['FirstName',  'CONTAINS',  'Carl'],
    ['LastName',  'EQUALS',  'W'],
];

用法：

var $table = $('tableSelector');
$.each(rows, function(i, obj){
   //Now use obj which is again an array and create the required html
   $table.append(...);
});

Answer 2

我認為這段代碼會將您的值放入JS對象中。 我還沒有測試

 var tbody = $("#columnsTable tbody");

var StudentInfo = {
    "FirstName" : {
        "title" : "FirstName", 
        "condition" : tbody.find("select[id='StudentInfo.FirstName-condition'] option:selected").val(), 
        "value" : tbody.find("input[id='StudentInfo.FirstName-value']").val(), 
        "checked" : (tbody.find("input[id='StudentInfo.FirstName-checkbox']:checked").length > 0)
    }, 
    "LastName" : {
        "title" : "LastName", 
        "condition" : tbody.find("select[id='StudentInfo.LastName-condition'] option:selected").val(), 
        "value" : tbody.find("input[id='StudentInfo.LastName-value']").val(), 
        "checked" : (tbody.find("input[id='StudentInfo.LastName-checkbox']:checked").length > 0)
    }, 
    "CurrentCollege" : {
        "title" : "CurrentCollege", 
        "condition" : tbody.find("select[id='StudentInfo.CurrentCollege-condition'] option:selected").val(), 
        "value" : tbody.find("input[id='StudentInfo.CurrentCollege-value']").val(), 
        "checked" : (tbody.find("input[id='StudentInfo.CurrentCollege-checkbox']:checked").length > 0)
    }, 
    "EmailAddress" : {
        "title" : "EmailAddress", 
        "condition" : tbody.find("select[id='StudentInfo.EmailAddress-condition'] option:selected").val(), 
        "value" : tbody.find("input[id='StudentInfo.EmailAddress-value']").val(), 
        "checked" : (tbody.find("input[id='StudentInfo.EmailAddress-checkbox']:checked").length > 0)
    }, 
    "Status" : {
        "title" : "Status", 
        "condition" : tbody.find("select[id='StudentInfo.Status-condition'] option:selected").val(), 
        "value" : tbody.find("input[id='StudentInfo.Status-value']").val(), 
        "checked" : (tbody.find("input[id='StudentInfo.Status-checkbox']:checked").length > 0)
    },
};

因為您在對象的ID和類名稱中使用了句點，所以我認為jQuery會遇到問題。 我在上面的代碼中使用了選擇器，該選擇器的句點應該沒有任何問題。

編輯

修復了一些選擇器

編輯2

至於使用這個： alert(StudentInfo.CurrentCollege.condition); 。