I wanted to save only date in my database. There is a table which holds dates in database and the column which holds date in type of "Date". Now I want to store date from UI,so I placed WPF DatePicker in UI which allows to select date, but whenever I try to get the data from datepicker it shows the date and time.But I want just the dates to be stored in database.
This is the thing i am doing. It is demo code by the way. Can t upload original code. But this explains the thing. you can see in the message box, it shows 14-10-2015 00:00:00 , i want this zeros to be removed.
The dateTime Picker has a property DisplayDate of Type DateTime. This type contains date and time information.
Just use picker.DisplayDate.Date this returns a DateTime value with the TimeOfDay component set to 00:00.00
Edit
Usually you use an SQL Statement to insert or update values in the database. You should use a parametrized SQL statement with an parameter of type DateTime. The SQL API will take care of the conversion form DateTime (.Net type) to your SQL Date type and strip all time information away. It is a good idea to set the time component to 00:00:00 however to avoid any strange "roundings".
Use ToShortDateString() at the end something like:
var date = datePicker.SelectedDate.Value.Date.ToShortDateString();
MessageBox.Show(date.ToString());
Related
I am having hard time to store date information into the datetime column of SQL Server.
I get the input from the user for three columns:
Creation Date
Preparation Date
Next Preparation Date
I use calendarextender and format the date as "yyyy/MM/dd". When all the fields have date, they are stored in the DB as for instance, 16-10-2016 (dd-MM-yyyy).
At this point I have two issues:
These columns are optional, when some of them are empty my code does not work (I assume because datetime cannot be null). To overcome this, I am using the following code snippet but still does not work.
DateTime? creationDate= null;
if (creationDateTextbox.Text != null && creationDateTextbox.Text != "")
{
creationDate= Convert.ToDateTime(creationDateTextbox.Text);
}
When I fetch the dates from DB, they are shown as 10/16/2016 (MM-dd-yyyy) which is different how I formatted it. I would like to show it in the format user enters them.
Dates do not have a format while stored in a database. It is actually usually just a very large long that counts the number of milliseconds from a set starting date.
If you want to store the format you need to stop storing it as dates and instead just treat the text as text in the database, however if you do this you won't get the advantage of sorting or filtering by a date range because it will just be seen as text.
Date time doesn't have any format You can format is as a string, suppose your DateTime type database field dt which contain date as 10/16/2016 (MM-dd-yyyy) then you can convert it
string s = dt.ToString("yyyy/MM/dd");
The answer to one of your questions is here: MSDN
You can use data annotations to format the dates that you get from your SQL DB. I'm assuming that you're using EF6; if not, you can change the field to a varchar in SSMS, and store the date as a String.
And the second, I'm unclear about, but if what you want is for your SQL DB column to be optional, you can use the Optional data annotation for that.
In my SQL database, I have BeginDate column of type date (so I want to get only day,month,year).
I add data into database in C#.
I look at Table_Data and everything is fine (for example BeginDate = 05/04/2014).
But when I get this data from database in C# with
string a= dt.Rows[i]["BeginDate"].ToString()
result is: a= 05/04/2014 12:00:00 AM
Why?
I can remove hour in string a with any methods. But why? I want to get only 05/04/2014 from database.
This is a display problem, not a data problem. Use the Formatting features of DateTime.ToString() to display the date in the format that you want.
If the data is coming out of the database in string form, use DateTime.Parse on it first.
Reference
Standard Date and Time Formats
Custom Date and Time Formats
I have this 21/10/1999 value manually inserted into the SQL database and when I retrieve it like this:
txtDOB.Text = readPatient["pDOB"].ToString();
It displays everything along with the time 12:00:00 AM. My data type for my date column is date, not datetime. So why is it displays the time as well?
((DateTime)readPatient["pDOB"]).ToString("d");
For a list of supported formats see: http://msdn.microsoft.com/es-es/library/zdtaw1bw(v=vs.110).aspx
You may try
txtDOB.Text = Convert.ToDateTime(readPatient["pDOB"]).ToString("dd/MM/yyyy", CultureInfo.InvariantCulture);
Edit: Thanks to comments saw that forgot to cast to datetime
It looks like you got your answer on how to properly format the value to a string without the time portion. But, no one has answered your other question:
So why is it displays the time as well?
This is because of mappings between SQL and .NET. In .NET a SQL "date" is stored in a DateTime object which does have time as well. To see all mappings between SQL and .NET see this: SQL Server Data Type Mappings
you can try this
txtDOB.Text=Convert.toDateTime(readPatient["pDOB"]).ToString("d/MM/yyyy");
You can use the string format parameter of the ToString to achieve any format you like,
like this:
TextBox1.Text =Convert.toDateTime(readPatient["pDOB"]).ToString("d/MM/yyyy");
Click on the datetimepicker then go to properties. There you can format your datetimepicker. Change format to custom (there few selection there) then set custom (provided in the properties menu) table with yy-MM-dd,an
DateTime dt = Convert.ToDateTime(sqdr["invdate"].ToString());
dt.Date; //To get the date only
In my ASP.NET (C#) project, I'm inserting some data into a database.
INSERT INTO USERS (username,join_date) VALUES('Ali',GETDATE());
Now when I'm fetching the date from the database, I'm using DateTime.
SqlDataReader r = Command.ExecuteReader();
r.Read();
myDate = r.getDateTime(0);
And when I'm inserting this in some DIV, I do this.
"<div>"+myDate.ToLongTimeString()+"</div>"
I get the correct date as in day/month/year, but the hour is always 12:00:00 AM.
How can I get the exact time?
make sure join_date is of type DATETIME and not DATE in the database
http://msdn.microsoft.com/en-us/library/ms186724.aspx
Using DATE as your column type means you are only storing the date not the time.
Therefore when you read the value back into a DateTime object the system has to initialise the time part - to midnight.
Convert the column to DATETIME and you'll get the time component stored as well.
For more information on the difference see the MSDN page on Date and Time Data Types and Functions
I send the registration date parameter to mysql database like "22-12-2010". But my sql date date type is in another format how can I change the date format like "2010-12-22" also I have to insert this into table.
Give code in C#,asp.net code behind either sql query statement!
Use this comprehensive MSDN pages as your guide: Standard Date and Time Format Strings and Custom Date and Time Format Strings.
There are many examples on those pages on how to reformat a date string in C#, and they also provide a good clear explanation on how date formatting works in the DateTime class.
Once you've reformatted your date string in C#, you should be able to pass it on down without needing to use SQL to reformat it.