How to list all month names, e.g. for a combo?
C#asp.net.NetDatetimeC# Problem Overview
At the moment I'm creating a DateTime
for each month and formatting it to only include the month.
Is there another or any better way to do this?
C# Solutions
Solution 1 - C#
You can use the DateTimeFormatInfo
to get that information:
// Will return January
string name = DateTimeFormatInfo.CurrentInfo.GetMonthName(1);
or to get all names:
string[] names = DateTimeFormatInfo.CurrentInfo.MonthNames;
You can also instantiate a new DateTimeFormatInfo
based on a CultureInfo
with DateTimeFormatInfo.GetInstance
or you can use the current culture's CultureInfo.DateTimeFormat
property.
var dateFormatInfo = CultureInfo.GetCultureInfo("en-GB").DateTimeFormat;
Keep in mind that calendars in .Net support up to 13 months, thus you will get an extra empty string at the end for calendars with only 12 months (such as those found in en-US or fr for example).
Solution 2 - C#
This method will allow you to apply a list of key value pairs of months to their int
counterparts. We generate it with a single line using Enumerable Ranges and LINQ. Hooray, LINQ code-golfing!
var months = Enumerable.Range(1, 12).Select(i => new { I = i, M = DateTimeFormatInfo.CurrentInfo.GetMonthName(i) });
To apply it to an ASP dropdown list:
// <asp:DropDownList runat="server" ID="ddlMonths" />
ddlMonths.DataSource = months;
ddlMonths.DataTextField = "M";
ddlMonths.DataValueField = "I";
ddlMonths.DataBind();
Solution 3 - C#
You can use the following to return an array of string containing the month names
System.Globalization.CultureInfo.CurrentCulture.DateTimeFormat.MonthNames
Solution 4 - C#
They're defined as an array in the Globalization namespaces.
using System.Globalization;
for (int i = 0; i < 12; i++) {
Console.WriteLine(CultureInfo.CurrentUICulture.DateTimeFormat.MonthNames[i]);
}
Solution 5 - C#
You can get a list of localized months from Thread.CurrentThread.CurrentCulture.DateTimeFormat.MonthNames
and invariant months from DateTimeFormatInfo.InvariantInfo.MonthNames
.
string[] localizedMonths = Thread.CurrentThread.CurrentCulture.DateTimeFormat.MonthNames;
string[] invariantMonths = DateTimeFormatInfo.InvariantInfo.MonthNames;
for( int month = 0; month < 12; month++ )
{
ListItem monthListItem = new ListItem( localizedMonths[month], invariantMonths[month] );
monthsDropDown.Items.Add( monthListItem );
}
There might be some issue with the number of months in a year depending on the calendar type, but I've just assumed 12 months in this example.
Solution 6 - C#
Try enumerating the month names:
for( int i = 1; i <= 12; i++ ){
combo.Items.Add(CultureInfo.CurrentCulture.DateTimeFormat.MonthNames[i]);
}
It's in the System.Globalization namespace.
Hope that helps!
Solution 7 - C#
public IEnumerable<SelectListItem> Months
{
get
{
return Enumerable.Range(1, 12).Select(x => new SelectListItem
{
Value = x.ToString(),
Text = DateTimeFormatInfo.CurrentInfo.GetMonthName(x)
});
}
}
Solution 8 - C#
A way to retrieve a dynamic culture specific list of month names in C# with LINQ.
ComboBoxName.ItemsSource=
System.Globalization.CultureInfo.
CurrentCulture.DateTimeFormat.MonthNames.
TakeWhile(m => m != String.Empty).ToList();
OR
In this example an anonymous object is created with a Month and MonthName property
var months = CultureInfo.CurrentCulture.DateTimeFormat.MonthNames
.TakeWhile(m => m != String.Empty)
.Select((m,i) => new
{
Month = i+1,
MonthName = m
})
.ToList();
PS: We use the method TakeWhile because the MonthNames array contains a empty 13th month.
Solution 9 - C#
A little LINQ just because it is beautifully concise:
var monthOptions = DateTimeFormatInfo.CurrentInfo.MonthNames
.Where(p=>!string.IsNullOrEmpty(p))
.Select((item, index) => new { Id = index + 1, Name = item });
You need the Where clause because the calendar returns a 13th month name (empty in English).
The index returns index within the IEnumerable, so you need a +1 for the actual month index.
Solution 10 - C#
Sure, I'll give my input to a 10+ year old question.
In my case, I create a property that returns a dictionary (or similar), generated with the following code:
Dictionary<int, string> Months = Enumerable.Range(1, 12).Select(i => new KeyValuePair<int, string>(i, System.Globalization.DateTimeFormatInfo.CurrentInfo.GetMonthName(i))).ToDictionary(x => x.Key, x => x.Value);
Output (from Linqpad):
Key Value
1 January
2 February
3 March
4 April
5 May
6 June
7 July
8 August
9 September
10 October
11 November
12 December
Hope somebody finds this useful!
Solution 11 - C#
I did in the following way: (it's possible to set the culture)
var months = Enumerable.Range(1, 12).Select(i =>
new
{
Index = i,
MonthName = new CultureInfo("en-US").DateTimeFormat.GetAbbreviatedMonthName(i)
})
.ToDictionary(x => x.Index, x => x.MonthName);
Solution 12 - C#
List<string> mnt = new List<string>();
int monthCount = Convert.ToInt32(cbYear.Text) == DateTime.Now.Year ? DateTime.Now.Month : 12;
for (int i = 0; i < monthCount; i++)
{
mnt.Add(CultureInfo.CurrentUICulture.DateTimeFormat.MonthNames[i]);
}
cbMonth.DataSource = mnt;
Solution 13 - C#
Here is a good example for filling a drop down list with Months for Credit Card form:
Dim currentCulture As CultureInfo = CultureInfo.CurrentUICulture
Dim monthName, monthNumber As String
For x As Integer = 0 To 11
monthNumber = (x + 1).ToString("D2")
monthName = currentCulture.DateTimeFormat.MonthNames(x)
Dim month As New ListItem(String.Format("{0} - {1}", monthNumber, monthName),
x.ToString("D2"))
ddl_expirymonth.Items.Add(month)
Next
Creates the following localized to current language, example:
01 - January
02 - February
etc.
Solution 14 - C#
How to create a custom list of month names in any order
Yes, I'm answering a question from over 10 years ago! :D
Yet, I wanted to add this code snippet on the chance it might help others. It shows how to output a list of month names in any custom order. In my case I needed it to start in October, but you could put the months in any sequence (even have repeating months) by setting the list of integers.
model.Controls = new
{
FiscalMonths = new
{
Value = DateTime.Now.Month,
Options = (new List<int> { 10, 11, 12, 1, 2, 3, 4, 5, 6, 7, 8, 9 }).Select(p => new
{
Value = p,
Text = DateTimeFormatInfo.CurrentInfo.GetMonthName(p)
})
}
};
And the json output for use in a dropdown:
"FiscalMonths": {
"Value": 10,
"Options": [
{
"Value": 10,
"Text": "October"
},
{
"Value": 11,
"Text": "November"
},
{
"Value": 12,
"Text": "December"
},
{
"Value": 1,
"Text": "January"
},
{
"Value": 2,
"Text": "February"
},
etc ....
Solution 15 - C#
You can easily do something like below with linq so that you only have 12 items in your drop down.
var Months = new SelectList((DateTimeFormatInfo.CurrentInfo.MonthNames).Take(12));