I have to bind an Html.DropDownList with just two items statically.
Text="Yes" Value="1"
Text="No" Value="0"
The important thing is that, I have to set the text and value fields.
How can I do this?
I used this is properly working
#Html.DropDownList("Status", new List<SelectListItem>
{
new SelectListItem{ Text="Active", Value = "1" },
new SelectListItem{ Text="Not-Active", Value = "0" }
})
It is a best practice not to create the SelectList in the view. You should create it in the controller and pass it using the ViewData.
Example:
var list = new SelectList(new []
{
new { ID = "1", Name = "name1" },
new { ID = "2", Name = "name2" },
new { ID = "3", Name = "name3" },
},
"ID", "Name", 1);
ViewData["list"]=list;
return View();
you pass to the constratctor: the IEnumerable objec,the value field the text field and the selected value.
in the View:
<%=Html.DropDownList("list",ViewData["list"] as SelectList) %>
Code below assumes you are using razor view engine if not you will need to convert it.
#{
var listItems = new List<ListItem>();
listItems.Add(new ListItem{Text="Yes", Value="1"});
listItems.Add(new ListItem{Text="No", Value="0"});
}
#Html.DropDownListFor(m=>m.SelectedValue, listItem);
You should consider creating the model in your code instead of the view. Also this would be a good candidate for an editor template.
if you want to be alittle explicity then try
#{
var domainsList = new SelectList(new []
{
new SelectListItem { Text = ".Com", Value = ".com", Selected = true },
new SelectListItem { Text = ".Shopping", Value = ".shopping"},
new SelectListItem { Text = ".Org", Value = ".org"},
new SelectListItem { Text = ".Net", Value = ".net"},
new SelectListItem { Text = ".AE", Value = ".ae"},
new SelectListItem { Text = ".Info", Value = ".info"},
}, "Value", "Text");
}
#Html.DropDownList("TopLevelDomains", domainsList)
This solved it for me:
<td>
#{ var RlistItems = new List<SelectListItem>();
RlistItems.Add(new SelectListItem { Text = "Select Room Type", Value = "0" });
RlistItems.Add(new SelectListItem { Text = "Meeting Room", Value = "1" });
RlistItems.Add(new SelectListItem { Text = "Office", Value = "2" });
RlistItems.Add(new SelectListItem { Text = "Cafeteria", Value = "3" });
}
#Html.DropDownListFor(model=>model.FirstOrDefault().RoomType
,RlistItems,RlistItems[item.RoomType.Value].Selected=true )
</td>
<select asp-for="CountryName" asp-items=#(new List<SelectListItem> { new SelectListItem {Text="India",Value="1" } ,new SelectListItem {Text="Japan",Value="2" }} ) class="form-control">
<option>SELECT COUNTRY -- </option>
Related
After hours of looking on Google and Stack Overflow, I can not find one bloody example of how to build a totally brain dead simple dropdown list that does not come from a database. Honestly, I am having a hard time getting my head around MVC. Can someone please show me how to create this:
<select name="FooBarDropDown" id="FooBarDropDown">
<option value="Option1" selected>This is Option 1</option>
<option value="Option2">This is Option 2</option>
<option value="Option3">This is Option 3</option>
</select>
Using this:
#Html.DropDownList....
I am looking for an all-in-one-line solution... all in the view. I am having a devil of a time with the syntax.
I think this is what you are looking for. It would be best though to refactor list construction into view model or in controller.
#Html.DropDownList("FooBarDropDown", new List<SelectListItem>
{
new SelectListItem{ Text="Option 1", Value = "1" },
new SelectListItem{ Text="Option 2", Value = "2" },
new SelectListItem{ Text="Option 3", Value = "3" },
})
An an example of placing this in the controller might look like this:
public ActionResult ExampleView()
{
var list = new List<SelectListItem>
{
new SelectListItem{ Text="Option 1", Value = "1" },
new SelectListItem{ Text="Option 2", Value = "2" },
new SelectListItem{ Text="Option 3", Value = "3", Selected = true },
};
ViewData["foorBarList"] = list;
return View();
}
And then in your view:
#Html.DropDownList("fooBarDropDown", ViewData["list"] as List<SelectListItem>)
If this is truly a static list that you might have to reuse in other views / controllers, then I would consider putting this logic into a static class of sorts. Example:
public static class DropDownListUtility
{
public static IEnumerable<SelectListItem> GetFooBarDropDown(object selectedValue)
{
return new List<SelectListItem>
{
new SelectListItem{ Text="Option 1", Value = "1", Selected = "1" == selectedValue.ToString()},
new SelectListItem{ Text="Option 2", Value = "2", Selected = "2" == selectedValue.ToString()},
new SelectListItem{ Text="Option 3", Value = "3", Selected = "3" == selectedValue.ToString()},
};
}
Which then leaves you a few different ways of accessing the list.
Controller Example:
public ActionResult ExampleView()
{
var list = DropDownListUtility.GetFooBarDropDown("2"); //select second option by default;
ViewData["foorBarList"] = list;
return View();
}
View Example:
#Html.DropDownList("fooBarDropDown", DropDownListUtility.GetFooBarDropDown("2"))
Have a look at the docs for this overload
public static MvcHtmlString DropDownList(
this HtmlHelper htmlHelper,
string name,
IEnumerable<SelectListItem> selectList
)
So just add a reference to your List<SelectListItem>() with your options.
List<SelectListItem> items = new List<SelectListItem>();
items.Add(new SelectListItem { Text = "Option1", Value = "Option1"});
items.Add(new SelectListItem { Text = "Option2", Value = "Option2" });
items.Add(new SelectListItem { Text = "Option3", Value = "Option3", Selected = true });
You can even embed that in your view if you don't want to pass it from your controller.
#{
List<SelectListItem> items = ...
}
Then use it
#Html.DropDownList("FooBarDropDown", items)
You can initialize a SelectListItem list (done here directly in the view) and then pass it to the DropDownList helper:
#{
List<SelectListItem> Listitems = new List<SelectListItem>();
for(int i = 1; i <= 50; i++)
{
items.Add(new SelectListItem { Text = i.ToString(), Value = i.ToString() });
}
}
#Html.DropDownList("ddlSequence", Listitems , new { id = "ddlSequence", #class = "form-control" })
#Html.DropDownList("FilterOptions", new List<SelectListItem>()
{ new SelectListItem { Text = "Begins with", Value = "1" },
new SelectListItem { Text = "Contains", Value = "2" } ,
new SelectListItem { Text = "Doesn't contain", Value = "3" } ,
new SelectListItem { Text = "Ends with", Value = "4" },
new SelectListItem { Text = "Doesn't equal", Value = "5" }
}, "Select filter options", new { #class = "large" })
The code given above is for a static dropdown for my search functionality.
How can I access the value of the dropdown in my Controller?
#Html.DropDownListFor(model => model.ZipFile, new SelectList(ViewBag.ZipFiles))
The above code creates me a select list just fine. But I want to make the selection optional. Unfortunately there is no empty option and I'd like to add one in. How would I do this?
By using the proper DropDownListFor overload:
#Html.DropDownListFor(
model => model.ZipFile,
new SelectList(ViewBag.ZipFiles),
"-- please select a zip file --"
)
#Html.DropDownListFor(model => model.Country, new List<SelectListItem>
{
new SelectListItem { Text = "India", Value = "1"},
new SelectListItem { Text = "USA", Value = "2"},
new SelectListItem { Text = "Sreelanka", Value = "3"},
new SelectListItem {Text = "Africa",Value="4"},
new SelectListItem { Text = "China", Value = "5" },
new SelectListItem { Text = "Austraila", Value = "6" },
new SelectListItem { Text = "UK", Value = "7" }
}, "Select Country",
new {#Style = "Width:500px;height:40px;",
#class = "form-control input-lg"})
In the controller, when you set ViewBag.ZipFiles, add a SelectListItem to that collection.
I am using the following to generate a drop down list:
#for (var index = 0; index < Model.AdminSummaries.Count(); index++)
{
<div class="rep_tr0">
<div class="rep_td0">
#Html.DropDownListFor(x => Model.AdminSummaries[index].Status,
AdminStatusReference.GetAdminStatusOptions(),
new { id = string.Format("Status_{0}",index ) })
</div>
</div>
}
Here's the HTML it generates:
<select id="Status_1" name="AdminSummaries[1].Status"><option value="1">Released</option>
<option value="2">Review</option>
<option value="3">New</option>
</select>
Here's the class that gives the status options.
public static class AdminStatusReference
{
public static IEnumerable<SelectListItem> GetAdminStatusOptions()
{
return new[]
{
new SelectListItem { Value = "1", Text = "Released" },
new SelectListItem { Value = "2", Text = "Review" },
new SelectListItem { Value = "3", Text = "New" }
};
}
}
Everything works good EXCEPT it doesn't select the items correctly. There's no option with 'selected' to match the data in the AdminSummaries.
How can I make it so the correct select list items are selected?
Just to clarify this. My problem is that if there is a data record with a value of 3 for the status then when I look at the screen I see a select list with the word "Release" showing.
What I need is for the select list to show text that corresponds with the data value.
Here is the more accurate answer
public static class AdminStatusReference
{
public static IEnumerable<SelectListItem> GetAdminStatusOptionsFor(AdminSummaries arg)
{
var options = new[]
{
new SelectListItem { Value = "1", Text = "Released" },
new SelectListItem { Value = "2", Text = "Review" },
new SelectListItem { Value = "3", Text = "New" }
};
options.First(o=> o.Value == arg).Selected = true;
return options;
}
}
Set the SelectListItem.Selected property to true:
public static class AdminStatusReference
{
public static IEnumerable<SelectListItem> GetAdminStatusOptions()
{
return new[]
{
new SelectListItem { Value = "1", Text = "Released", Selected = true },
new SelectListItem { Value = "2", Text = "Review" },
new SelectListItem { Value = "3", Text = "New" }
};
}
}
It seams from the source code that the DropDownListFor method (actually the ViewDataEvaluator.Eval method) doesn't support expressions containing indexers. Because your expression: AdminSummaries[index].Status contains an indexer that's why the framework doesn't use the selected value from your model class.
The only solution is to specify the selected item when setting the SelectListItem collection, you can do this by passing the currently selected value to your GetAdminStatusOptions method:
View:
#Html.DropDownListFor(x => Model.AdminSummaries[index].Status,
AdminStatusReference.GetAdminStatusOptions(Model.AdminSummaries[index].Status),
new { id = string.Format("Status_{0}",index ) })
A sample GetAdminStatusOptions implementation:
public static IEnumerable<SelectListItem> GetAdminStatusOptions(string selected = null)
{
var options = new[]
{
new SelectListItem {Value = "1", Text = "Released"},
new SelectListItem {Value = "2", Text = "Review"},
new SelectListItem {Value = "3", Text = "New"}
};
foreach (var option in options)
{
option.Selected = option.Value == selected;
}
return options;
}
I am using hardcoded string values for dropdownlist to the view , and passing the selected value from database , where 0 = pending , 1 = complete and 3 = awaiting, below is the code for view and controller:
var paymentStatus = new[] { "Pending", "Complete", "AwaitingPayment" };
ViewData["StatusID"] = new SelectList(paymentStatus, "Value", "Text", booking.StatusID);
<tr><td>Status</td><td><%: Html.DropDownListFor(m => m.StatusID, ViewData["StatusID"] as SelectList)%></td></tr>
It comes up with the error :
DataBinding: 'System.String' does not contain a property with the name 'Value'.
The problem with your example is that you are passing a string array into the SelectList and then telling the SelectList to use the Value and Text properties (which a string does not have). You should probably create a class for this:
public class Status {
public int Id { get; set; }
public string Text { get; set; }
}
var statusTypes = new List<Status> {
new Status { Id = 1, Text = "Pending" },
new Status { Id = 2, Text = "Complete" },
new Status { Id = 3, Text = "AwaitingPayment" }
};
Better yet, create a repository for this data:
var statusTypes = statusRepository.GetStatusTypes();
Pass this into your SelectList:
SelectList statusList = new SelectList(statusTypes, "Id", "Text", booking.StatusID);
// return this in a ViewModel or use ViewData like you are now:
ViewData["Status"] = statusList;
return View(statusList);
Please use view models:
var paymentStatuses = new[]
{
new SelectListItem { Value = "0", Text = "Pending" },
new SelectListItem { Value = "1", Text = "Complete" },
new SelectListItem { Value = "3", Text = "AwaitingPayment" },
};
var model = new SomeViewModel
{
StatusID = booking.StatusID,
Statuses = new SelectList(paymentStatuses, "Value", "Text")
}
return View(model);
and then:
<tr>
<td>
Status
</td>
<td>
<%= Html.DropDownListFor(m => m.StatusID, Model.Statuses) %>
</td>
</tr>
or if you insist on this ViewData (I don't recommend it, especially as you already have a view model):
var paymentStatuses = new[]
{
new SelectListItem { Value = "0", Text = "Pending" },
new SelectListItem { Value = "1", Text = "Complete" },
new SelectListItem { Value = "3", Text = "AwaitingPayment" },
};
ViewData["Statuses"] = new SelectList(paymentStatuses, "Value", "Text");
var model = new SomeViewModel
{
StatusID = booking.StatusID
}
return View(model);
and in the view:
<tr>
<td>
Status
</td>
<td>
<%= Html.DropDownListFor(m => m.StatusID, ViewData["Statuses"] as SelectList) %>
</td>
</tr>
The error shows it is unable to Fine "Value" , you have to do something like
new SelectList(paymentStatus, booking.Status, "Text", booking.StatusID)
bookin.Status will be the any text property of booking. hope this help