How to set select value in select2 plugin - jquery

问题

I use this code for insert data to select element with select2 plugin:

$.ajax({
    type: "POST",
    url: "ws.asmx/GetEvrakGrup",
    data: "{}",
    contentType: "application/json; charset=utf-8",
    dataType: "json",
    success: function (dc, status) {
        jsonData = JSON.parse(dc.d);
        $("#selectId").select2({
            data: jsonData
        });

    },
    error: function () { alert("This is an Error");}
});

After I want to set a value in this select but its not working:

$("#selectId").val(81);

回答1:

Try this :

$("#selectId").val(81).trigger('change');

Instead of

$("#selectId").val(81);

回答2:

try below code:

var $example = $("#selectId").select2();
$example.val(81).trigger("change"); 

回答3:

$("#MyDropdownList").select2("trigger", "select", {
                        data: { id: theID, text: theText }
                    });

来源：https://stackoverflow.com/questions/38873508/how-to-set-select-value-in-select2-plugin-jquery