How can I only assign year 2011 in datetime variable in C #

Question

I have an asp as as text box where the user will fill in only the annual value. For this value, I have a Datetime type in a C # application and a date type column in the database. So I want to convert this txtYear.Text to DateTime. But he will hold and / or show the year. Please help me in this situation.

Answer 1

A DateTime object will always contain the full DateTime value; you cannot use it to store only a year. (what use will it be anyway?) Also, the year data type is an int, not a DateTime.

So, I would suggest changing your property to datatype int, both in your code and in the database.

Answer 2

To display only the year, use the format "yyyy".

string s = "2011"; DateTime d = new DateTime(int.Parse(s), 1, 1); Console.WriteLine(d.ToString("yyyy")); Console.WriteLine(d); 

Answer 3

You must specify the format of the used DateTime value:

 String dateTimeFormat = "yyyy"; 

To show only part of the DateTime value, use the following:

 dateTimeValue.ToString(dateTimeFormat); 

To read the String value that represents the year in DateTime , use the following:

 DateTime.ParseExact(stringValue, dateTimeFormat, CultureInfo.InvariantCulture); 

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The DateTime.ParseExact (String, String, IFormatProvider) method converts the specified string representation of the date and time into its DateTime equivalent using the specified format and format information for a specific culture. The format of the string representation must exactly match the specified format.

The DateTime.ToString method converts the value of the current DateTime object to its equivalent string representation.

Answer 4

A DateTime always has a full date component. When you create an instance of DateTime, you need to set the month and day, but you can ignore them in your use.

 DateTime d = new DateTime(int.Parse(txtYear.Text, 1, 1); txtYear.Text = d.ToString("yyyy"); 

Even better is not to use DateTime, but just to use int. If you only have a year, you only need int.

Answer 5

Instead of using any string manipulation function, use the Year property. Check the msdn documentation by visiting the link below.

DateTime.Year Property

Answer 6

I assume the text field name is txYear

 DateTime dt = new DateTime (Convert.ToInt32(txYear.text),1,1) 

save this dt value in the database

Answer 7

If you want only a year, why don't you make it type smallint ?

Anyway, if you really want to do this year,

 DateTime x = new DateTime(Convert.ToInt32(txtYear.text), 1, 1); 

But make sure you confirm that txtYear.text really has a year.