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i want to write birthday for users in mysql database.
i create entity framework to my mysql server.
when i try to add birthday i got

An exception of type 'System.Data.Entity.Validation.DbEntityValidationException' occurred in TarifinizBizde.dll but was not handled in user code

Additional information: Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.

this exception.

and i think the mysql datetime format is:"yyyy-mm-dd"
and entity framework date time format is:"dd-mm-yyyy"

how can i change mysql or entity framework datetime?

usr.DogumTarihi = Convert.ToDateTime(txtDogum.Text);

What I have tried:

using globalization tostring("yyyy-mm-dd")
but they are not worked
Updated 1-Jun-16 20:24pm
Richard Deeming 1-Jun-16 11:26am    
And what does the EntityValidationErrors property tell you?
Dave Kreskowiak 1-Jun-16 12:49pm    
There's no such thing as a "format" for a DateTime. A format is only applicable in the UI, not in the code or database.


Can you try it like below:

bool parsed = false;
DateTime outDate;
parsed = DateTime.TryParseExact(inputDate, "dd-MM-yyyy", CultureInfo.CurrentCulture, DateTimeStyles.None, out outDate);

    usr.DogumTarihi = outDate.ToString("yyyy-MM-dd");
    // Invalid date has been passed

But remember you will need to use System.Globalization namespace to use this.

Please let me know.

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First, find out what are the errors you are getting. Then come back with the result. This piece of code might help you finding out the errors:

    // put your code here for saving or updating record.
catch (DbEntityValidationException ex)
StringBuilder sbError = new StringBuilder();
    foreach (var objError in ex.EntityValidationErrors)
sbError.AppendFormat("Entity Type \"{0}\" in state \"{1}\" has the following errors:", objError.Entry.Entity.GetType().Name, objError.Entry.State);
        foreach (var validationError in objError.ValidationErrors)
sbError.AppendFormat("Property: \"{0}\", Error: \"{1}\"",
                validationError.PropertyName, validationError.ErrorMessage);           
string validationErrors = sbError.ToString();
    //put you debugger here and see what is the value of "validationErrors"
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