BindingSource Filter by date

Question

I want to filter values from database based on date.

Date in a database contains values like this: 2008-12-28 18:00:00. And my class has a DateTime variable depending on which I want to filter. Ideally it would work like this: myBindingSource.Filter = "DATE(myDateField) = myDateTime.Date" + adjusting myDateTime.Date format as needed.

But it throws an EvaluateException: "The expression contains undefined function call DATE()."

Although if I execute the SQL statement directly, I can use the DATE() function in filter.

P.S. I use MYSQL DB with the Connector/Net 5.2

How can I solve this problem?

Thank You all for suggestions.

Answer 1

The getSqlDate function is not needed. You can use String.Format() to format dates:

String.Format("{0:yyyy-MM-dd} 00:00:00", myDateTime)

OR

myDateTime.Date.ToString("yyyy-MM-dd") + " 00:00:00"

You could filter the binding source like this:

myBindingSource.Filter = String.Format("myDateField >= '{0:yyyy-MM-dd}' AND myDateField < '{1:yyyy-MM-dd}'", myDateTime, myDateTime.AddDays(1));

Answer 2

Thank you Tom H.

Yes, i wanted to eliminate the time portion of the datetime in the filter and your suggestion works perfectly.

I`ll leave the complete solution for others:

myBindingSource.Filter = "myDateField >= '" + getSqlDate(myDateTime) + "' AND myDateField < '" + getSqlDate(myDateTime.AddDays(1)) + "'";

where getSqlDate function is:

string getSqlDate(DateTime date) {
    string year = "" + date.Year;
    string month = (date.Month < 10) ? "0" + date.Month : "" + date.Month;
    string day = (date.Day < 10) ? "0" + date.Day : "" + date.Day;

    return year + "-" + month + "-" + day + " 00:00:00";
}

Answer 3

A correction to the answer: Accoring to msdn ,to get the correct date the mm in

yyyy-mm-dd

would have to be capitalized like so;

yyyy-MM-dd

to get a correctly formatted date.