Read the value in the datepicker control

Question

Hi,

I have a datepicker control in ClassA.

From ClassB,  want to read the date in the datepicker control. How can i do this?

Thanks in advance

Answer 1

Hi,

Declare the datepicker control on classA as public.

Then you can access it form ClassB by using Class'a s instance.

Ex

ClassA a = new ClassA();
DateTime dt=a.dateTimePicker1.Value;

or you can write a property on ClassA that encapsulates the value of datetimepicker

ex

public DateTime DateTimeOfControl
{
get{return dateTimePicker1.Value;}
set{dateTimePicker1.Value=value;}
}

Answer 2

In the below code there are two ways you can get the value of datetimepicker. For first way you can create a public property and access it from first form.

Public Class Form2
    Public ReadOnly Property SelectedDate() As Date
        Get
            Return DateTimePicker1.Value
        End Get
    End Property
End Class

Public Class Form1
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim f As New Form2
        f.ShowDialog()
        MsgBox(f.DateTimePicker1.Value)  'First Way
        MsgBox(f.SelectedDate)  'Second Way
    End Sub
End Class

I would recommend to use First way (Creating public property). Also you can create a public property or variable in module and can access that from anywhere.

---

Gaurav Khanna

Answer 3

Hi,

I tried property as you suggsted but it only returns " / / ".
The date  is not returned.
when i tried datepicker.value, it says value is not a member of datepicker.

I tried to make it public but did not help. (In  my case, classA is in a User control. I hope this does not change any thing in the way you access it.)

Thanks.

 

Answer 4

COuld you send the structure of your user control.

Where is class a and where is datetimepicker is declared? And where do you want to access it?

Answer 5

Hi Tamer,



UsercontrolA - This is in a different solution. I am importing this dll into the main application.
dpDemanddate is the datepicker control on this User control.

On UsercontrolA :

Public Class ReservationsLeg
   
Public ReadOnly Property selecteddemanddate() As String
        Get
                       Return dpDemandDate.DateValue
        End Get

    End Property

End Class

Main Application - This is a different solution from the UsercontrolA. Here i import the UsercontrolA.

imports UsercontrolA

public Class DemandReservation

Dim Nextleg as ReservationsLeg

Private Sub btnNextLeg_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnNextLeg.Click

lbl_date.text = Nextleg.selecteddemanddate ----- returning " / / "

End Sub

End Class

Answer 6

Hi,

I don't get the structure of UserControlA

is it?
public  class userControlA
    public class ReservationsLeg
    ..........................
    end class

End class

or

public  class userControlA

End class
    public class ReservationsLeg
    ..........................
    end class

and how do you access the control on usercontrol.

By the way are you sure that your datetimepicker control has value and it is returning  / / ?

Answer 7

Hi tamer,

We have a project called ReservationUserControls.

In this project, i have a usercontrol named ReservationsLeg. In the code behind of this control, i have the  public class ReservationsLeg



and how do you access the control on usercontrol.

Most of the work is done on the user control side adn we show it on the main application.

To access it, in the main application:

dim nextleg as ReservationsLeg

nextleg.property    ------ properties, method calls etc.


datetimepicker does not have a value property. It says value is not a member of datepicker. I found a datevalue property so, i tried that and it was showing " / / ".

Answer 8

Hi tamer,

I import ReservationUserControls. into the main application without which icannot access this.
As i said earlier this is in a different solution from the main application.

Answer 9

I think your project is asp.net project

Since it is related to asp.net it is better to ask at forums.asp.net.

Also checking that if your control has value when you try to get the value is a good idea, maybe it retuns /  /  because it does not have any value selected.

Answer 10

Hi,

 

Based on my understanding, you have two projects. You create a userControl in Project ReservationUserControls. Then use this control in your main project.

 

I create two projects on my side.

UserControl project has a UserControl named MyControl.vb.

The setup project is named VBTest1218.

 

MyControl in the UserControl project:

Public Class MyControl

 

    Private Sub UserControl1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

 

    End Sub

 

    ' use a public property to get the datetimepicker value

    Public ReadOnly Property DTPtime() As DateTime

        Get

            Return DateTimePicker1.Value

        End Get

    End Property

 

End Class

 

I want to use the MyControl in my main project VBTest1218.

First, I need to add UserControl project as a reference to VBTest1218. Then I can use Mycontrol of Usercontrol project in my main project.

Click Add reference ->choose projects tab -> choose UserControl project-> Ok button

 

My main form:

 

Imports UserControl

 

Public Class Form1

 

    Dim DTPcontrol As New MyControl

 

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        Me.Controls.Add(DTPcontrol)

    End Sub

 

    ' show the datetimepicker out

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Console.WriteLine(DTPcontrol.DTPtime.ToString())

    End Sub

 

End Class

 

Then I can get the correct datetimepicker value.  (output: 2009/12/18 下午12:38:49)

 

You can also modify the dateTimePicker modifier property to public. Then you can get the datetimepicker directly.

MessageBox.Show(DTPcontrol.DateTimePicker1.Value.ToString())

 

If there is anything unclear, please feel free to tell us.

 

By the way, as @tamer Oz said, if this is an asp.net application, you can get a better response at asp.net forum. http://forums.asp.net

 

Best regards,

Ling Wang

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