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date time picker and validate event ( is this a bug ? )a bug How to reproduce : throw on a form a date time picker control and a textbox control select the validating event of the control and add this code Private Sub DateTimePicker1_Validating(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles DateTimePicker1.Validating TextBox1.Text = Me.DateTimePicker1.Text End Sub start the project change the standard value of the control but only the day or month ( not the year ) now move away from the control with a tab The textbox will show a different value as there is currently showed on your screen by the date time picker does someone have a good explanation for this ? regards Michel For people strugling with the same problem
i just found a workaround create you own custom datetime picker ( copy and paste this code ) Option Strict On Option Explicit On Public Class CustomDateTimePicker Inherits DateTimePicker Protected Overrides Sub OnValidating(ByVal e As System.ComponentModel.CancelEventArgs) MyBase.Visible = False MyBase.Visible = True MyBase.OnValidating(e) End Sub End Class This one behaves as expected , however if you have fast eyes or a slow machine you might see a blink :-) I consider the standard behavior as a bug regards Michel Posseth [MCP] Show quoteHide quote "Michel Posseth [MCP]" wrote: > > I have a problem with the date time picker validate event wich i believe is > a bug > > > How to reproduce : > > throw on a form a date time picker control and a textbox control > > select the validating event of the control and add this code > > Private Sub DateTimePicker1_Validating(ByVal sender As System.Object, ByVal > e As System.ComponentModel.CancelEventArgs) Handles DateTimePicker1.Validating > TextBox1.Text = Me.DateTimePicker1.Text > End Sub > > start the project > > change the standard value of the control but only the day or month ( not the > year ) now move away from the control with a tab > > The textbox will show a different value as there is currently showed on your > screen by the date time picker > > > does someone have a good explanation for this ? > > regards > > Michel > > > > Michel,
Validating a date-time picker? Is that something they do in Rotterdam? You can in my idea better validate if the water there is clear enough to drink. :-) CorShow quoteHide quote "Michel Posseth [MCP]" <MichelPosseth***@discussions.microsoft.com> schreef in bericht news:F1830618-5B82-4EFF-9474-A6E08111EB7D@microsoft.com... > > I have a problem with the date time picker validate event wich i believe > is > a bug > > > How to reproduce : > > throw on a form a date time picker control and a textbox control > > select the validating event of the control and add this code > > Private Sub DateTimePicker1_Validating(ByVal sender As System.Object, > ByVal > e As System.ComponentModel.CancelEventArgs) Handles > DateTimePicker1.Validating > TextBox1.Text = Me.DateTimePicker1.Text > End Sub > > start the project > > change the standard value of the control but only the day or month ( not > the > year ) now move away from the control with a tab > > The textbox will show a different value as there is currently showed on > your > screen by the date time picker > > > does someone have a good explanation for this ? > > regards > > Michel > > > > Well Cor ,,,
I currently work in a energy company , an we write software that calculates energy bills . A bill has to be made in a certain range of a time span so before we create new entry`s in the database we would like to "validate" this entered range, however it gets a bit tricky if the value that is showed is different from the one that is in memory have you tried my example of the problem ? , try it out and you will see that this must be a serious bug . by the way i found that this is enough to solve the problem Option Strict On Option Explicit On Public Class CustomDateTimePicker Inherits DateTimePicker Protected Overrides Sub OnValidating(ByVal e As System.ComponentModel.CancelEventArgs) MyBase.Visible = True MyBase.OnValidating(e) End Sub End Class regards Michel Show quoteHide quote "Cor Ligthert [MVP]" wrote: > Michel, > > Validating a date-time picker? > > Is that something they do in Rotterdam? > > You can in my idea better validate if the water there is clear enough to > drink. > > :-) > > Cor > > "Michel Posseth [MCP]" <MichelPosseth***@discussions.microsoft.com> schreef > in bericht news:F1830618-5B82-4EFF-9474-A6E08111EB7D@microsoft.com... > > > > I have a problem with the date time picker validate event wich i believe > > is > > a bug > > > > > > How to reproduce : > > > > throw on a form a date time picker control and a textbox control > > > > select the validating event of the control and add this code > > > > Private Sub DateTimePicker1_Validating(ByVal sender As System.Object, > > ByVal > > e As System.ComponentModel.CancelEventArgs) Handles > > DateTimePicker1.Validating > > TextBox1.Text = Me.DateTimePicker1.Text > > End Sub > > > > start the project > > > > change the standard value of the control but only the day or month ( not > > the > > year ) now move away from the control with a tab > > > > The textbox will show a different value as there is currently showed on > > your > > screen by the date time picker > > > > > > does someone have a good explanation for this ? > > > > regards > > > > Michel > > > > > > > > > > > Michel,
Don't take it serious, I saw the validating event and than thought is that the right place, I made the message. After a while I thought, you are of course testing the given date to certain possibilities, not if the given date is correct. I can assure you that I don't have to test things you say, I take it on your word. However sometimes I can not resist. Cor Show quoteHide quote "Michel Posseth [MCP]" <MichelPosseth***@discussions.microsoft.com> schreef in bericht news:BB842582-89E4-4DE4-B4AF-D7819333E06E@microsoft.com... > Well Cor ,,, > > > I currently work in a energy company , an we write software that > calculates > energy bills . > > A bill has to be made in a certain range of a time span > > so before we create new entry`s in the database we would like to > "validate" > this entered range, however it gets a bit tricky if the value that is > showed > is different from the one that is in memory > > have you tried my example of the problem ? , try it out and you will see > that this must be a serious bug . > > by the way i found that this is enough to solve the problem > > Option Strict On > Option Explicit On > Public Class CustomDateTimePicker > Inherits DateTimePicker > Protected Overrides Sub OnValidating(ByVal e As > System.ComponentModel.CancelEventArgs) > MyBase.Visible = True > MyBase.OnValidating(e) > End Sub > End Class > > > regards > > Michel > > > > > > "Cor Ligthert [MVP]" wrote: > >> Michel, >> >> Validating a date-time picker? >> >> Is that something they do in Rotterdam? >> >> You can in my idea better validate if the water there is clear enough to >> drink. >> >> :-) >> >> Cor >> >> "Michel Posseth [MCP]" <MichelPosseth***@discussions.microsoft.com> >> schreef >> in bericht news:F1830618-5B82-4EFF-9474-A6E08111EB7D@microsoft.com... >> > >> > I have a problem with the date time picker validate event wich i >> > believe >> > is >> > a bug >> > >> > >> > How to reproduce : >> > >> > throw on a form a date time picker control and a textbox control >> > >> > select the validating event of the control and add this code >> > >> > Private Sub DateTimePicker1_Validating(ByVal sender As System.Object, >> > ByVal >> > e As System.ComponentModel.CancelEventArgs) Handles >> > DateTimePicker1.Validating >> > TextBox1.Text = Me.DateTimePicker1.Text >> > End Sub >> > >> > start the project >> > >> > change the standard value of the control but only the day or month ( >> > not >> > the >> > year ) now move away from the control with a tab >> > >> > The textbox will show a different value as there is currently showed on >> > your >> > screen by the date time picker >> > >> > >> > does someone have a good explanation for this ? >> > >> > regards >> > >> > Michel >> > >> > >> > >> > >> >> >>
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