html-select

问题 I have an intial group of options like these: <select name="item[type]"> <option value="0" class="dr">First</option> <option value="1" class="dr">Second</option> <option value="2" class="dr">Third</option> <option value="3" class="dr">Fourth</option> </select> I want to check if a variable isset($test) is defined. If it is, then I want to change the option selected where the value is equal of $test . Something like this <OPTION SELECTED> For example. $test = 3 ; so, the option selected should

问题 I have an intial group of options like these: <select name="item[type]"> <option value="0" class="dr">First</option> <option value="1" class="dr">Second</option> <option value="2" class="dr">Third</option> <option value="3" class="dr">Fourth</option> </select> I want to check if a variable isset($test) is defined. If it is, then I want to change the option selected where the value is equal of $test . Something like this <OPTION SELECTED> For example. $test = 3 ; so, the option selected should

问题 I'm trying to make a Div appear if special "option" is selected in a Drop Down list. No matter what I try I can't make it work. I tried other pages here but nothing seems to make it work. My C# code protected void ddlSubject_SelectedIndexChanged(object sender, EventArgs e) { if (ddlEmne.SelectedValue == "Lej os") { divselected.Visible = true; } if (ddlEmne.SelectedValue == "") { divselected.Visible = false; } } My DropDownList: <asp:DropDownList CssClass="margtop" ID="ddlEmne" runat="server"

问题 Is there a way to create DropDownList with Razor and pass second parameter as Linq result instead of default empty item? The key is that I'm using accumulator function ("Function") so I can not pass null into it (as a answer to that question - Alternative for multiple IF/CASE statements) If DropDownList is not suitable I would really appreciate an alternative. Controller: public ActionResult Index(string searchFullName, string searchExtension, string searchProject) { var extensionList = new

问题 I have 4 drop-down lists on my page but for some odd reason streetid is not visible when townid is visible I can't understand what the link is. Would really appreciate it if someone would be able to clarify the matter. View Code <h2>Create</h2> <script language="javascript" type="text/javascript"> function GetRegions(_countryid) { var procemessage = "<option value='0'> Please wait...</option>"; $("#regionid").html(procemessage).show(); var url = "/Citizens/GetRegions/"; $.ajax({ url: url,

问题 I have a strange issue with the <Select><option/></select> tag.I don't write any code to enable context search(ie. if I type A it will list all possible combinations with A like AA,Aa,Ab,AB,Ac,AC and so on(not in the same order)).Similarly if I type Ab it should list all combinations starting with Ab which it does but the problem is you have to be little quick here otherwise if I press A and wait some time and then press B then I wil get all contents starting with B and not with AB which is

问题 I have a drop down menu that is created in the following fashion: <select id="ip_addr"> {% for host in hosts %} <option value="{{ host.ipaddress }}">{{ host.ipaddress }}</option> {% endfor %} </select> and I don't know how to set the default value. Normally I would just say something like <option value="0.0.0.0" selected>0.0.0.0</option> but since I am populating this drop down menu with a loop I don't know how to make sure that the option I want is selected. I'm sure there is a really

问题 I am building a system that allows people to choose their own icons to go along with certain values. There are going to be many, many icons to choose from. I would like to make a select box that has multiple columns with different options, because having a vertical list of 50+ icons would be absurd and not at all usable. I've found a lot of information on how to separate a single option into columns, but nothing that suggests that you could make a table-like arrangement of options. Is such a

问题 I am using Ant Select component inside Dropdown component. Here is my index file which renders Dropdown const getMenu = filter => ( <MenuContainer ... /> ); <Dropdown overlay={getMenu(searchFilter)} trigger={['click']} visible={this.state.search} onVisibleChange={val => this.handleDropdownVisibility(val, searchFilter) } > ... </Dropdown> Here is my MenuContainer which return Select Component inside it handleSelectChange = val => { this.setState({ selectedValue: val, }); }; <Select ref=

问题 I have a problem with Angular 6: if I use a component based on the <select> element (combo-box), if I use it with the classic way, everything works (notice that I used the selected attribute: the result is that in the template the default option already appears as selected, as I would expect!): <select data-width="200px" title="title" name = "name" > <option value='default' selected>Default</option> <option value='1'>Value 1</option> <option value='2'>Value 2</option> </select> The problem is