如何將C＃中的數據添加到動態添加的下拉列表

Question

我正在製作一個網站，我需要將數據添加到從數據庫中獲取數據的C＃類的下拉列表中。

我做了一個網站，我可以動態地添加一個下拉列表和一個使用文本框的jQuery：

$(document).ready(function() { 
     var max_fields = 10; //maximum input boxes allowed 
     var wrapper = $(".input_fields_wrap"); //Fields wrapper 
     var add_button = $(".add_field_button"); //Add button ID 

     var x = 1; //initlal text box count 
     $(add_button).click(function (e) { //on add input button click 
      e.preventDefault(); 
      if (x < max_fields) { //max input box allowed 
       x++; //text box increment 

       $(wrapper).append('<div><select id="ddlCon" >getCars()</select>&nbsp;&nbsp;&nbsp;&nbsp;<input type="text" name="mytext[]"/><a href="#" class="remove_field">Remove</a></div>'); //add input box 
      } 
     }); 

     $(wrapper).on("click", ".remove_field", function (e) { //user click on remove text 
      e.preventDefault(); $(this).parent('div').remove(); x--; 
     }) 
    }); 

<div class="input_fields_wrap"> 
     <button class="add_field_button">Add More Fields</button> 
     <div> 
      <select id="ddlCon"><option></option></select>&nbsp;&nbsp;&nbsp;&nbsp;<input type="text" name="mytext[]" /> 
     </div> 
    </div> 

我曾嘗試使用以下jQuery的嘗試，但我無法得到它的工作：

function getCars() { 
     $.ajax({ 
      type: "POST", 
      url: "GS1-128-Palle.aspx/populatePalleList", 
      data: "{'index':1}", 
      contentType: "application/json; charset=utf-8", 
      dataType: "json", 
      success: function (response) { 
       var branches = response.d; 
       $('select').empty(); 
       $.each(branch, function (index, branches) { 
        $('select').append('<option >' + branch + '</option>'); 
       }); 
      }, 

      failure: function (msg) { 
      } 
     }); 
    } 

我錯過了什麼？

Answer 1

試試這個： -

$(add_button).click(function (e) { //on add input button click 
e.preventDefault(); 
if (x < max_fields) { //max input box allowed 
    x++; //text box increment 
    var dv = $('<div/>'), 
    select = $('<select/>').appendTo(dv); 
    dv.append('<input type="text" name="mytext[]"/><a href="#" class="remove_field">Remove</a>'); 
    $(wrapper).append(dv); 
    getCars(select); 
} 
}); 

和你getCars功能： -

function getCars(select) { 
$.ajax({ 
    type: "POST", 
    url: "GS1-128-Palle.aspx/populatePalleList", 
    data: "{'index':1}", 
    contentType: "application/json; charset=utf-8", 
    dataType: "json", 
    success: function (response) { 
     var branches = response.d; 
     $(select).empty(); 
     $.each(branches, function (index, branch) { 
      $(select).append('<option >' + branch + '</option>'); 
     }); 
    }, 

    failure: function (msg) { 
    } 
}); 
} 

Answer 2

可能這可以幫助你。

success: function (result) { 
         var markup = ""; 
         if (result.length < 1) { 
          markup = "<option value='0'>--Nothing to Select--</option>"; 
         } else { 
          data = result; 
          markup = "<option value='0'>--Select--</option>"; 
          for (var x = 0; x < data.length; x++) { 
           markup += "<option value=" + data[x].ValueId + ">" + data[x].DisplayText + "</option>"; 
          } 
         } 
         $("#Dropdownid").html(markup).show(); 

        }