javascript - 无法添加和删除动态生成的下拉菜单

Question

我想以这种格式生成动态下拉列表：

 <div class="row"> //first row containing 2 dynamic Dropdown 
                <div class="col-md-3 col-xs-12 col-sm-12  form-group">
                 <select id="field1">
                </div>
                <div class="col-md-3 col-xs-12 col-sm-12  form-group">
                 <select id="field1">
                </div>
 </div>
 <div class="row"> //second row containing 2 dynamic Dropdown 
                <div class="col-md-3 col-xs-12 col-sm-12  form-group">
                 <select id="field2">
                </div>
                <div class="col-md-3 col-xs-12 col-sm-12  form-group">
                 <select id="field2">
                </div>
 </div>

ETC......

输出格式：

注意：我想在每行末尾删除按钮

 var cnt = 1;
function AddRow() {
        var fieldWrapper1 = $("<div class='col-md-4 col-xs-12 col-sm-12' id='field" + cnt + "'/>");
        var fieldWrapper2 = $("<div class='col-md-4 col-xs-12 col-sm-12' id='field" + cnt + "'/>");
        var fieldWrapper3 = $("<div class='col-md-4 col-xs-12 col-sm-12' id='field" + cnt + "'/>");
        var fieldWrapper4 = $("<div class='col-md-4 col-xs-12 col-sm-12' id='field" + cnt + "'/>");
        var fName1 = $("<select class='fieldname' id='drpdownCourse" + cnt + "'  name='drpdownCourseNm" + cnt + "'  />");
        var fName2 = $("<select class='fieldname' id='drpdownSubCourse" + cnt + "'  name='drpdownSubCourseNm" + cnt + "'  />");
        var fName3 = $("<select class='fieldname' id='drpdownSubject" + cnt + "'  name='drpdownSubjectNm" + cnt + "'  />");
        var removeButton = $("<img class='remove' src='../remove.png' />");

        fieldWrapper1.append(fName1);
        fieldWrapper2.append(fName2);
        fieldWrapper3.append(fName3);
        fieldWrapper4.append(removeButton);
        $("#FieldContainer").append(fieldWrapper1);
        $("#FieldContainer").append(fieldWrapper2);
        $("#FieldContainer").append(fieldWrapper3);
        $("#FieldContainer").append(fieldWrapper4);
        cnt = cnt + 1;
    }

  $(document).on('click', "img.remove", function () {
        $(this).parent().fadeOut(1000, function () {
            var id = $(this).attr("id").substr(5);
            
            $(this).remove();
        });
    });

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
  <div class="row" id="FieldContainer">
   </div>
<a onclick="AddRow()" href="#">+ Add </a>

删除按钮也不会删除整行。当我单击删除按钮时，应该只删除整行（包含 2 个下拉菜单）。

score 2 · Accepted Answer

你可能想这样做：

http://jsfiddle.net/4gsnewbv/

你的 JS：

.......


    fieldWrapper1.append(fName1);
    fieldWrapper2.append(fName2);
    fieldWrapper3.append(fName3);
    fieldWrapper4.append(removeButton);
    var newRow = $('<div class="row" id=""></div>');


    $(newRow).append(fieldWrapper1);
    $(newRow).append(fieldWrapper2);
    $(newRow).append(fieldWrapper3);
    $(newRow).append(fieldWrapper4);
    $("body").append(newRow); // I am assuming it will be a direct child of body. If not, use the appropriate ID or Class
......

所以每次你添加一行下拉菜单时，它都会嵌套在里面

<div class="row" id="">
    ...Your dropdowns and image goes here...
</div>

所以总的来说它看起来类似于

<body>
    <div class="row" id="">
       ...Your dropdowns and image goes here...
    </div>

    <div class="row" id="">
       ...Your dropdowns and image goes here...
    </div>

    and so on...     

</body>

然后使用 jQueryclosest选择器找到具有类的父级row并删除该特定行。

 $(document).on('click', "img.remove", function () {
    $(this).closest(".row").fadeOut(1000, function () {  //targets the entire row of dropdowns
        var id = $(this).attr("id").substr(5);

        $(this).remove();
    });
});

编辑：如果您想要添加按钮之前的新行：

....
   $(newRow).insertBefore($(".add-more").parent()); 
....

score 1 · Accepted Answer

var cnt = 1;
function AddRow() {
        var fieldWrapper1 = $("<div class='col-md-4 col-xs-12 col-sm-12' id='field" + cnt + "'/>");
        var fieldWrapper2 = $("<div class='col-md-4 col-xs-12 col-sm-12' id='field" + cnt + "'/>");
        var fieldWrapper3 = $("<div class='col-md-4 col-xs-12 col-sm-12' id='field" + cnt + "'/>");
        var fieldWrapper4 = $("<div class='col-md-4 col-xs-12 col-sm-12' id='field" + cnt + "'/>");
        var fName1 = $("<select class='fieldname' id='drpdownCourse" + cnt + "'  name='drpdownCourseNm" + cnt + "'  />");
        var fName2 = $("<select class='fieldname' id='drpdownSubCourse" + cnt + "'  name='drpdownSubCourseNm" + cnt + "'  />");
        var fName3 = $("<select class='fieldname' id='drpdownSubject" + cnt + "'  name='drpdownSubjectNm" + cnt + "'  />");
        var removeButton = $("<img class='remove' src='http://icons.iconseeker.com/png/fullsize/web-development-3/action-delete-sharp-thick.png' />");

        fieldWrapper1.append(fName1);
        fieldWrapper1.append(fName2);
        fieldWrapper1.append(fName3);
  fieldWrapper1.append(removeButton.clone());
        
        $("#FieldContainer").append(fieldWrapper1);
        $("#FieldContainer").append(fieldWrapper2);
        $("#FieldContainer").append(fieldWrapper3);
        $("#FieldContainer").append(fieldWrapper4);
        cnt = cnt + 1;
    }

  $(document).on('click', "img.remove", function () {
        $(this).parent().fadeOut(1000, function () {
            var id = $(this).attr("id").substr(5);
            
            $(this).remove();
        });
    
    });
AddRow();

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
  <div class="row" id="FieldContainer">
   </div>
<a onclick="AddRow()" href="#">+ Add </a>

score 1 · Accepted Answer

如果您想在用户每次单击“添加”时添加带有两个下拉列表和删除按钮的行，您可以尝试以下操作。( https://jsfiddle.net/0npzqr1a/4/ )

var cnt = 1;
function AddRow() {

        var rowWrapper = $('<div class="row" id="FieldContainer"></div>');

        var fieldWrapper1 = $("<div class='col-md-4 col-xs-12 col-sm-12'/>");
        var fieldWrapper2 = $("<div class='col-md-4 col-xs-12 col-sm-12'/>");
        var fName1 = $("<select class='fieldname' id='drpdownCourse" + cnt + "'  name='drpdownCourseNm" + cnt + "'  />");
        var fName2 = $("<select class='fieldname' id='drpdownSubCourse" + cnt + "'  name='drpdownSubCourseNm" + cnt + "'  />");
        var removeButton = $("<img class='remove' src='../remove.png' />");

        fieldWrapper1.append(fName1);       
        fieldWrapper2.append(fName2);
        rowWrapper.append(fieldWrapper1);
        rowWrapper.append(fieldWrapper2);
        rowWrapper.append(removeButton);

        $("#FieldContainer").append(rowWrapper);
        cnt = cnt + 1;
    }

  $(document).on('click', "img.remove", function () {
        $(this).closest('.row').fadeOut(1000, function () {
            var id = $(this).attr("id").substr(5);

            $(this).remove();
        });
    });

  $(document).on('click', "a#add", function () {
        AddRow();
    });

和html，

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<div class="row" id="FieldContainer">
</div>
<a id="add" href="#">+ Add </a>

score 1 · Accepted Answer

您可以使用 html 模板来添加和删除元素。

为此，您只需根据需要创建一个 html 模板。

<script type="text/template" id="rowtemplate">
        <div class="select-row row">
            <div class="col-md-3 col-xs-12 col-sm-12  form-group">
                <select id="field1"></select>
            </div>
            <div class="col-md-3 col-xs-12 col-sm-12  form-group">
                <select id="field1"></select>
            </div>
            <div>
                <a class="removeBtn">Remove</a>
            </div>
        </div>
    </script>

现在您可以简单地添加或删除每一行。

您的添加功能将如下所示，

<script>
    function AddRow() {
        $('#FieldContainer').append($('#rowtemplate').html());
    }
</script>

你可以看到我已经提到了模板中删除按钮的类名。因此，我们可以只处理每个删除按钮的点击事件并删除它的 html 元素。

$(document).ready(function () {
    // click event for all remove button
    $('body').on('click', '.removeBtn', function () {
        $(this).closest('.select-row').remove();
    });
});

您可以看到使用 html 模板时添加和删除是多么简单。那你为什么要选择其他方式。

希望这会帮助你。如果您有任何疑问，请发表评论。

javascript - 无法添加和删除动态生成的下拉菜单

4 回答 4

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