Four types of jquery dynamic add option drop-down box code

Four types of jquery dynamic addition of option drop-down box code this article adds four examples of using jquery dynamic addition of option drop-down box code, with this jquery option instance, you can easily operate the option item. If you want to delete the option item, you can delete it.

Four types of jquery dynamic add option drop-down box code
This article has added four instance codes that use jquery to dynamically add option drop-down boxes. With this jquery option, you can easily operate option items and delete and modify them.

Function loadsteel_num (typeid ){
Var drp2 = $ ("drsteel_num ");
Drp2.options. length = 0;
Downloadurl ('bsorder _ steel_num.asp tutorial x? B _typeid = '+ typeid, function (xml, responsecode ){
Var dom
If (document. all) // ie
{
Dom = new activexobject ("microsoft. xmldom ");
Dom. loadxml (xml)
}
Else if (window. domparser) // firefox
Dom = new domparser (). parsefromstring (xml, "text/xml ");
If (dom)
{
Items1 = dom. getelementsbytagname ("item ");
Var itemslength = items1.length;
For (I = 0; I <itemslength; I ++)
{
Var newoption = document. createelement ("option ");
Newoption. text = items1 [I]. getattribute ("name ");
Newoption. value = items1 [I]. getattribute ("name ");
Drp2.options. add (newoption );
}
}
});

 

<Items>
<Item name = "abc"> </item>
</Items>

// Method 2

$ ("# Selectid"). append ("<option value = '" + value + "'>" + text + "</option> ");

Of course, in addition to this sentence, there are also set the default value, the first value, the last value, the n value, and so on, so I searched the internet:

Jquery gets the selected text and value of select:

1. $ ("# select_id"). change (function () {// code...}); // Add an event for select, triggered when one of the select events is selected

2. var checktext = $ ("# select_id"). find ("option: selected"). text (); // obtain the selected text

3. var checkvalue = $ ("# select_id"). val (); // obtain the value selected by select

4. var checkindex = $ ("# select_id"). get (0). selectedindex; // obtain the index value selected by select

5. var maxindex = $ ("# select_id option: last"). attr ("index"); // obtain the largest index value of select.

 

Jquery adds/deletes select option items:

1. $ ("# select_id"). append ("<option value = 'value'> text </option>"); // append an option for select (drop-down)

2. $ ("# select_id "). prepend ("<option value = '0'> select </option>"); // insert an option for select (first position)

3. $ ("# select_id option: last"). remove (); // Delete the largest option (last) index value in select)

4. $ ("# select_id option [index = '0']"). remove (); // Delete the option with the index value 0 in select (the first option)

5. $ ("# select_id option [value = '3']"). remove (); // Delete the option with value = '3' In the select statement

5. $ ("# select_id option [text = '4']"). remove (); // Delete the option of '4' text = '4' in select

Jquery dynamically adds option Method 4

// First Verification
$ (Document). ready (function (){
$ ("# Listone"). dblclick (function (){
Alert ($ ("# listone option: selected"). text (); // The text and html here get the same result.
// Var temp = $ ("# listone option: selected"). text ();

// $ ("<Div>" mirror.html (temp). appendto ("... "); $ (" <Div> ") or $ (" <span> ") can be dynamically added
// Try $ ("<option>" cmd.html (temp). appendto ("# listtwo"); failed !!!
// Finally, change $ ("option" cmd.html (temp). appendto ("# listtwo"). If the file is loaded successfully, you still don't know why.
$ ("# Listone option: selected"). appendto ("# listtwo ");
});
});

<Div>
<Select size = "10" class = "mytext" id = "listone">
<Option> 1 </option>
<Option> 3 </option>
<Option> 4 </option>
<Option> 5 </option>
</Select>
<Div id = "title"> Add </div>
<Select size = "10" class = "mytext" id = "listtwo">
</Select>
<Div id = "auto"> </div>

</Div>
Css tutorial
<Pre class = java name = "code"> <style type = "text/css">
<! --
. Mytext {
Width: 200px;
Height: 200px;
Background-color: # ffffff;
Clear: right;
Float: left;
}
# Title {
Clear: right;
Float: left;
Padding-top: 80px;
Width: 70px;
Text-align: center;
}
-->
</Style>
</Pre>
<Br>