Using Datetime in a SQLparameter for Stored Procedure, Format Error

Using DateTime in a SqlParameter for Stored Procedure, format error

How are you setting up the SqlParameter? You should set the SqlDbType property to SqlDbType.DateTime and then pass the DateTime directly to the parameter (do NOT convert to a string, you are asking for a bunch of problems then).

You should be able to get the value into the DB. If not, here is a very simple example of how to do it:

static void Main(string[] args)
{
    // Create the connection.
    using (SqlConnection connection = new SqlConnection(@"Data Source=..."))
    {
        // Open the connection.
        connection.Open();

        // Create the command.
        using (SqlCommand command = new SqlCommand("xsp_Test", connection))
        {
            // Set the command type.
            command.CommandType = System.Data.CommandType.StoredProcedure;

            // Add the parameter.
            SqlParameter parameter = command.Parameters.Add("@dt",
                System.Data.SqlDbType.DateTime);

            // Set the value.
            parameter.Value = DateTime.Now;

            // Make the call.
            command.ExecuteNonQuery();
        }
    }
}

I think part of the issue here is that you are worried that the fact that the time is in UTC is not being conveyed to SQL Server. To that end, you shouldn't, because SQL Server doesn't know that a particular time is in a particular locale/time zone.

If you want to store the UTC value, then convert it to UTC before passing it to SQL Server (unless your server has the same time zone as the client code generating the DateTime, and even then, that's a risk, IMO). SQL Server will store this value and when you get it back, if you want to display it in local time, you have to do it yourself (which the DateTime struct will easily do).

All that being said, if you perform the conversion and then pass the converted UTC date (the date that is obtained by calling the ToUniversalTime method, not by converting to a string) to the stored procedure.

And when you get the value back, call the ToLocalTime method to get the time in the local time zone.

Pass datetime to stored procedure

Use DateTime.ParseExact to get your string converted to a datetime then pass the datetime

string test = "2014-09-18";
DateTime dt = DateTime.ParseExact(test, "yyyy-MM-dd", CultureInfo.InvariantCulture);
SqlParams[0] = new SqlParameter("@StartDate", SqlDbType.DateTime);
SqlParams[0].Value = dt;

If your input comes from a user typed value, then it is probably better to use DateTime.TryParseExact to verify the input without getting an exception.

if(!DateTime.TryParseExact(test, "yyyy-MM-dd", 
             CultureInfo.InvariantCulture, DateTimeStyles.None, out dt))
{
    MessageBox.Show("Type a date in the format yyyy-MM-dd");
    return;
}

How to specify date format used by ADO.NET when passing it to a stored procedure?

Dates have no format, they're binary values. In .NET DateTime uses a tick count field internally. SQL Server uses several date types, none of which is based, parsed or stored as a string. ADO.NET passes parameters as separate, binary parameters to the RPC call to the server.

One way or the other the data access code that's missing is converting dates to strings instead of using parameterized queries.

This code wouldn't convert dates to strings or need parsing on the server:

Using con As SqlConnection = New SqlConnection(connectionString)
Using cmd As New SqlCommand("TestDate", con)
cmd.CommandType = CommandType.StoredProcedure

cmd.Parameters.Add("@date", SqlDbType.Date).Value = New Date(2021, 1, 13)

cmd.ExecuteNonQuery()

The type could be any of the date types, eg: SqlDbType.DateTime, SqlDbType.DateTime2 or SqlDbType.DateTimeOffset. The type that best matches the stored procedure parameter is Date

What about SSMS ?

In SSMS the queries are written as text. Even a parameter declaration in the end uses text. You need to provide the correct date literal to avoid localization issues.

datetime is a legacy type that's affected by DATEFORMAT unless a full ISO8601 string or an unseparated YYYYMMDD string is used. This means that YYYY-MM-DD can be parsed as YYYY-DD-MM if datetime is used.

The newer types don't have this problem. date, the correct type for this parameter and datetime2, datetimeoffset all recognize YYYY-MM-DD no matter what DATEFORMAT is.

StoredProcedure In EntityFramework DateTime Error

You defined your @StartDate and @EndDate columns as DateTime but you try to pass them string values.

Just pass the right type and values to your parameter like;

SqlParameter sd = new SqlParameter("@StartDate", StartDate.Date);
SqlParameter ed = new SqlParameter("@EndDate", EndDate.Date);

SQL Server stored procedure: datetime parameter is wrong format sometimes depending on dateformat of country

There are many formats supported by SQL Server - see the MSDN Books Online on CAST and CONVERT. Most of those formats are dependent on what settings you have - therefore, these settings might work some times - and sometimes not.

The way to solve this is to use the (slightly adapted) ISO-8601 date format that is supported by SQL Server - this format works always - regardless of your SQL Server language and dateformat settings.

The ISO-8601 format is supported by SQL Server comes in two flavors:

• YYYYMMDD for just dates (no time portion); note here: no dashes!, that's very important! YYYY-MM-DD is NOT independent of the dateformat settings in your SQL Server and will NOT work in all situations!

or:

• YYYY-MM-DDTHH:MM:SS for dates and times - note here: this format has dashes (but they can be omitted), and a fixed T as delimiter between the date and time portion of your DATETIME.

This is valid for SQL Server 2000 and newer.

If you use SQL Server 2008 or newer and the DATE datatype (only DATE - not DATETIME!), then you can indeed also use the YYYY-MM-DD format and that will work, too, with any settings in your SQL Server.

Don't ask me why this whole topic is so tricky and somewhat confusing - that's just the way it is. But with the YYYYMMDD format, you should be fine for any version of SQL Server and for any language and dateformat setting in your SQL Server.

The recommendation for SQL Server 2008 and newer is to use DATE if you only need the date portion, and DATETIME2(n) when you need both date and time. You should try to start phasing out the DATETIME datatype if ever possible

Update: if you're on SQL Server 2012 or newer, you could use the new TRY_PARSE function in T-SQL which allows you to parse strings representing dates safely. You can specify a locale to use, and if the parse doesn't work, you get back a NULL instead of an exception.

Try this:

DECLARE @input NVARCHAR(100) = N'21.01.2016 03:54:08'

SELECT 
    TRY_PARSE(@input AS DATE USING 'en-gb')

Should return a valid DATE value of Jan-21, 2016 - no matter what language/locale your SQL Server is set to

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