Question

I use code such as this to clear out the values in several text boxes:

Private Sub RibbonButtonInsert_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RibbonButtonInsert.Click

    UpdateDataSource()

    StudentsBindingSource.ResetBindings(True)
    DatePickerDateOfBirth.Value = ""
    RichEditBoxForeName.Focus()
    StudentsBindingSource.AddNew()
End Sub

Because the date picker control did not clear out like the other controls did, I tried:

    DatePickerDateOfBirth.Value = ""

but it does not clear out. Instead, I get an “InvalidCastException”.

Can you show me what coding I need to properly clear out the value in this data picker?

Answer 1

Actually you are not clearing it out, you are assigning a string value to it. and as it is a Date type, the assignment is wrong.

the assigned value must be a Date format, you can do this:

DatePickerDateOfBirth.Value = Date.MinValue

later you can check and if the value is equal to MinValue, then the date is not set.