jquery Select Fetch value, assignment operation

Select >jquery Select Value, assignment operation

First, get Select

Gets the text selected by select:

$ ("#ddlRegType"). Find ("option:selected"). Text ();

Gets the index selected by select:

$ ("#ddlRegType"). Get (0). SelectedIndex;

Second, set Select

Set the index selected by select:

$ ("#ddlRegType"). Get (0). SelectedIndex = Index;//index is an indexed value

Set the value selected by select:

$ ("#ddlRegType"). attr ("value", "Normal");

$ ("#ddlRegType"). Val ("Normal");

$ ("#ddlRegType"). Get (0). value = value;

Set selected text for select:

1 var count = $ ("#ddlRegType option"). Length;
2
3 for (Var i=0;i<count;i++)
4 {

5 if ($ ("#ddlRegType"). Get (0). Options[i].text = text)
6 {
7 $ ("#ddlRegType"). Get (0). options[i].selected = true;
8 break;
9}
10}

$ ("#select_id option[text= ' jQuery ']"). attr ("selected", true);

To set the SELECT option item:

$ ("#select_id"). Append ("<option value= ' value ' >Text</option>"); Add an option

$ ("#select_id"). Prepend ("<option value= ' 0 ' > Please select </option>"); Insert an option before

$ ("#select_id option:last"). Remove (); Delete the maximum index value option

$ ("#select_id option[index= ']"). Remove ()//delete option with index value of 0

$ ("#select_id option[value= ' 3 ']"). Remove (); Delete option with a value of 3

$ ("#select_id option[text= ' 4 ']"). Remove (); Delete option with text value of 4

Empty Select:

$ ("#ddlRegType"). empty ();

Drop-down Box:

var cc1 = $ (". FORMC select[@name = ' country '] option[@selected]"). Text (); Gets the text of the selected item in the Drop-down menu (note that there are spaces in the middle)
var CC2 = $ ('. FORMC select[@name = ' country '] '). Val (); Gets the value of the selected item in the Drop-down menu
var cc3 = $ ('. FORMC select[@name = ' country '] '). attr ("id"); Gets the id attribute value of the selected item in the Drop-down menu
$ ("#select"). Empty ()//Empty Drop-down box//$ ("#select"). HTML (");
$ ("<option value= ' 1 ' >1111</option>"). Appendto ("#select")//option to add a drop-down box

A little explanation:
1.select[@name = ' country '] option[@selected] Represents the Name property,
and the attribute value is the option element with the selected attribute inside the Select element of ' country ';
It can be seen that a @ begins with a property that follows.

2, Radio Box:
$ ("input[@type =radio][@checked]"). Val (); Gets the value of the selected item in the Radio box (note that there are no spaces in the middle)
$ ("input[@type =radio][@value =2]"). attr ("Checked", ' checked '); Sets the value=2 of the radio box to the selected state. (Note that there are no spaces in between)

3, check box:
$ ("input[@type =checkbox][@checked]"). Val (); Gets the value of the first item selected in the check box
$ ("input[@type =checkbox][@checked]"). each (function () {//, because the check box is typically selected for more than one, you can cycle the output
Alert ($ (this). Val ());
});

$ ("#chk1"). attr ("Checked", "");/no tick.
$ ("#chk2"). attr ("Checked", true);/tick
if ($ ("#chk1"). attr (' checked ') ==undefined) {}//judge whether it has been ticked

Traversing option and adding, removing option
function Changeshipmethod (shipping) {
var len = $ ("select[@name =ishiptype] option"). length
if (shipping.value!= "CA") {
$ ("select[@name =ishiptype] option"). each (function () {
if ($ (this). val () = 111) {
$ (this). Remove ();
}
});
}else{
$ ("<option value= ' >ups ground</option>"). Appendto ($ ("select[@name =ishiptype]");
}
}

Get the selected value of the dropdown menu

$ (#testSelect option:selected '). Text ();
or $ ("#testSelect"). Find (' option:selected '). Text ();
or $ ("#testSelect"). Val ();