我在ASP.NET DropDownList上使用jQuery的AutoComplete，用户可以选择一个值并提交以进入数据库。但是他们也必须能够键入一个值，而我似乎无法在后面的代码中访问该值。
继承人jQuery：
(function ($) {
$.widget("ui.combobox", {
_create: function () {
var self = this,
select = this.element.hide(),
selected = select.children(":selected"),
value = selected.val() ? selected.text() : "";
var input = this.input = $("<input id='txtOptValue'>")
.insertAfter(select)
.val(value)
.autocomplete({
delay: 0,
minLength: 0,
source: function (request, response) {
var matcher = new RegExp($.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);
};
this.button = $("<button type='button'> </button>")
.attr("tabIndex", -1)
.attr("title", "Show All Items")
.insertAfter(input)
.button({
icons: {
primary: "ui-icon-triangle-1-s"
},
text: false
})
.removeClass("ui-corner-all")
.addClass("ui-corner-right ui-button-icon")
.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.input.remove();
this.button.remove();
this.element.show();
$.Widget.prototype.destroy.call(this);
}
});
})(jQuery);
所以这需要我的DropDownList，隐藏它，创建一个输入字段作为我的选择，也让我输入值..这是我的DropDownList：
<asp:FormView ID="frmCreateOptionValue" runat="server" DataKeyNames="OptionValueID"
DataSourceID="OptionSetValues_DS" DefaultMode="Insert"
oniteminserting="frmCreateOptionValue_ItemInserting">
<InsertItemTemplate>
<table border="0" cellpadding="0" cellspacing="0" id="id-form">
<tr>
<th>
Add Option Set Value:
</th>
<td>
<div class="ui-widget" runat="server" id="addOptValue">
<asp:DropDownList ID="ddlAddOptionValue" runat="server" ClientIDMode="Static" DataSourceID="OptionValues_DS"
DataTextField="Name" DataValueField="OptionValueID" AppendDataBoundItems="true"
SelectedValue='<%# Bind("OptionValueID") %>'>
<asp:ListItem Value="" Text="Select One..." />
</asp:DropDownList>
<asp:ObjectDataSource ID="OptionValues_DS" runat="server" OldValuesParameterFormatString="original_{0}"
SelectMethod="GetDataBy1" TypeName="PurekbbDataSetTableAdapters.tblOptionValueTableAdapter">
<SelectParameters>
<asp:QueryStringParameter Name="oID" QueryStringField="optionSetID" Type="Int32" />
</SelectParameters>
</asp:ObjectDataSource>
</div>
</td>
<td>
<asp:LinkButton ID="InsertButton" runat="server" CausesValidation="True" CommandName="Insert"
CssClass="form-submit" />
</td>
</tr>
</table>
</InsertItemTemplate>
</asp:FormView>
当用户插入项目时：
protected void OptionSetValues_DS_Inserting(object sender, ObjectDataSourceMethodEventArgs e)
{
// if the value doesn't already exist, create it
if (e.InputParameters["OptionValueID"] == null)
{
// !!!! CANNOT FIND THE HTML INPUT AND SAVE THE VALUE
string ovName = ((TextBox)frmCreateOptionValue.FindControl("txtOptValue")).Text;
int ovOptionID = Convert.ToInt32(Request.QueryString["OptionSetID"]);
tblOptionValueTableAdapter t = new tblOptionValueTableAdapter();
int ovID = Convert.ToInt32(t.InsertQuery(ovOptionID, ovName, 0, ""));
e.InputParameters["OptionValueID"] = ovID;
}
}
我被困在哪里，如何从jQuery中生成的HTML输入字段中获取值？
如何实现这一目标，这让我感到害怕;）
答案 0 :(得分：1)
您可以使用javascript获取此文本框的值并将其保存在隐藏字段中，然后从后面的代码中读取隐藏字段值
把这个放在javascript中
$('#HiddenFieldID').val($('#txtOptValue').val());
然后代码看起来像这样
protected void OptionSetValues_DS_Inserting(object sender, ObjectDataSourceMethodEventArgs e)
{
// if the value doesn't already exist, create it
if (e.InputParameters["OptionValueID"] == null)
{
// !!!! CANNOT FIND THE HTML INPUT AND SAVE THE VALUE
string ovName = ((HiddenField)frmCreateOptionValue.FindControl("HiddenFieldID")).Value;
int ovOptionID = Convert.ToInt32(Request.QueryString["OptionSetID"]);
tblOptionValueTableAdapter t = new tblOptionValueTableAdapter();
int ovID = Convert.ToInt32(t.InsertQuery(ovOptionID, ovName, 0, ""));
e.InputParameters["OptionValueID"] = ovID;
}
}
答案 1 :(得分：0)
这是使用HiddenField的解决方案：
将onblur添加到动态创建的输入中：
(function ($) {
$.widget("ui.combobox", {
_create: function () {
var self = this,
select = this.element.hide(),
selected = select.children(":selected"),
value = selected.val() ? selected.text() : "";
var input = this.input = $("<input id='txtOptValue' onblur='JavaScript:copyValue()'>") ....
将HiddenField和jQuery添加到页面：
<asp:HiddenField runat="server" ID="hfoValue" EnableViewState="true" ClientIDMode="Static" />
<div class="ui-widget" runat="server" id="addOptValue">
<script type="text/javascript" language="javascript">
function copyValue() {
var theVal = $('#txtOptValue').val();
//alert('Copyng ' + theVal);
$('#hfoValue').val(theVal);
//alert('copied');
}
</script>
<asp:DropDownList ID="ddlAddOptionValue" runat="server" ClientIDMode="Static" DataSourceID="OptionValues_DS"
DataTextField="Name" DataValueField="OptionValueID" AppendDataBoundItems="true"
SelectedValue='<%# Bind("OptionValueID") %>'>
<asp:ListItem Value="" Text="Select One..." />
</asp:DropDownList> ...
最后从HiddenField中访问值：
protected void OptionSetValues_DS_Inserting(object sender, ObjectDataSourceMethodEventArgs e)
{
// if the value doesn't already exist, create it
if (e.InputParameters["OptionValueID"] == null)
{
// !!!! FOUND THE VALUE :)
string ovName = ((HiddenField)frmCreateOptionValue.FindControl("hfoValue")).Value;
int ovOptionID = Convert.ToInt32(Request.QueryString["OptionSetID"]);
tblOptionValueTableAdapter t = new tblOptionValueTableAdapter();
int ovID = Convert.ToInt32(t.InsertQuery(ovOptionID, ovName, 0, ""));
e.InputParameters["OptionValueID"] = ovID;
}
}
感谢@Miroprocessor帮助解决了这个问题