我正在尝试将JQuery UI Autocomplete (Combobox)与ASP.NET MVC3中的下拉列表一起使用。
以下是我视图中相关的代码部分:
<div class="editor-label">
@Html.LabelFor(model => model.MerchantID, "Merchant")
</div>
<div class="editor-field">
@Html.DropDownList("MerchantID", null, String.Empty, new { @class = "combobox" })
@Html.ValidationMessageFor(model => model.MerchantID)
</div>
<div class="editor-label">
@Html.LabelFor(model => model.FinancialAccountID, "FinancialAccount")
</div>
<div class="editor-field">
@Html.DropDownList("FinancialAccountID", null, String.Empty, new { @class = "combobox" })
@Html.ValidationMessageFor(model => model.FinancialAccountID)
</div>
(下拉列表中有4到10个。)
以下是javascript文件的内容,基本上是从jquery-ui website:
复制而来的(function ($) {
$.widget("ui.combobox", {
_create: function () {
var input,
self = this,
select = this.element.hide(),
selected = select.children(":selected"),
value = selected.val() ? selected.text() : "",
wrapper = this.wrapper = $("<span>")
.addClass("ui-combobox")
.insertAfter(select);
input = $("<input>")
.appendTo(wrapper)
.val(value)
.addClass("ui-state-default ui-combobox-input")
.autocomplete({
delay: 0,
minLength: 0,
source: function (request, response) {
var matcher = new RegExp($.ui.autocomplete.escapeRegex(request.term), "i");
response(select.children("option").map(function () {
var text = $(this).text();
if (this.value && (!request.term || matcher.test(text)))
return {
label: text.replace(
new RegExp(
"(?![^&;]+;)(?!<[^<>]*)(" +
$.ui.autocomplete.escapeRegex(request.term) +
")(?![^<>]*>)(?![^&;]+;)", "gi"
), "<strong>$1</strong>"),
value: text,
option: this
};
}));
},
select: function (event, ui) {
ui.item.option.selected = true;
self._trigger("selected", event, {
item: ui.item.option
});
},
change: function (event, ui) {
if (!ui.item) {
var matcher = new RegExp("^" + $.ui.autocomplete.escapeRegex($(this).val()) + "$", "i"),
valid = false;
select.children("option").each(function () {
if ($(this).text().match(matcher)) {
this.selected = valid = true;
return false;
}
});
if (!valid) {
// remove invalid value, as it didn't match anything
$(this).val("");
select.val("");
input.data("autocomplete").term = "";
return false;
}
}
}
})
.addClass("ui-widget ui-widget-content ui-corner-left");
input.data("autocomplete")._renderItem = function (ul, item) {
return $("<li></li>")
.data("item.autocomplete", item)
.append("<a>" + item.label + "</a>")
.appendTo(ul);
};
$("<a>")
.attr("tabIndex", -1)
.attr("title", "Show All Items")
.appendTo(wrapper)
.button({
icons: {
primary: "ui-icon-triangle-1-s"
},
text: false
})
.removeClass("ui-corner-all")
.addClass("ui-corner-right ui-combobox-toggle")
.click(function () {
// close if already visible
if (input.autocomplete("widget").is(":visible")) {
input.autocomplete("close");
return;
}
// work around a bug (likely same cause as #5265)
$(this).blur();
// pass empty string as value to search for, displaying all results
input.autocomplete("search", "");
input.focus();
});
},
destroy: function () {
this.wrapper.remove();
this.element.show();
$.Widget.prototype.destroy.call(this);
}
});
})(jQuery);
$(function () {
$(".combobox").combobox();
});
我遇到的问题是,似乎没有对输入的值进行任何验证。例如,如果我将其留空并提交,则没有错误表明已输入无效信息。但是,如果我注释掉combobox()调用以禁用组合框功能,则验证工作正常。
我已经针对此问题对stackoverflow进行了一些搜索,但我似乎无法找到符合此特定情况的任何内容。
编辑:我发现验证确实发生了,但只有在我提交前点击另一个字段,这很奇怪。因此,如果我将空白文本输入到组合框中,然后单击进入文本字段,然后提交,它可以正常工作(显示验证错误。)但是如果我在组合框中输入空白文本并提交,则不会显示验证错误。有任何想法吗?
答案 0 :(得分:1)
好的,我发现了问题。
当按下提交按钮时,javascript验证在之前被称为,当检测到错误输入时,清除所选项目的自动完成JQuery。这是我的意思:
if (!valid) {
// remove invalid value, as it didn't match anything
$(this).val("");
select.val("");
input.data("autocomplete").term = "";
return false;
}
因此,我在用户开始输入时立即清除所选项目,并仅在选择有效项目时重新选择。
source: function (request, response) {
select.val(""); //as soon as typing is started, the select input is cleared. This makes sure validation always occurs
var matcher = new RegExp($.ui.autocomplete.escapeRegex(request.term), "i");
response(select.children("option").map(function () {
var text = $(this).text();
if (this.value && (!request.term || matcher.test(text)))
return {
label: text.replace(
new RegExp(
"(?![^&;]+;)(?!<[^<>]*)(" +
$.ui.autocomplete.escapeRegex(request.term) +
")(?![^<>]*>)(?![^&;]+;)", "gi"
), "<strong>$1</strong>"),
value: text,
option: this
};
}));
},