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event not firing for a composite control

Posted on 2012-03-27
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428 Views
Last Modified: 2012-04-17
Hi, I have a composite control that currently only has one masked edit box. I would like to capture the value of text entered in the text box when focus leaves the composite control. I was surprised to see the Leave event available for a composite control and I was excited as that would solve my problem, but that does not fire for me. In the containing class for the composite control, a winfows form, I need to capture the value entered in the masked edit box and without that its hard for me to capture the values properly. Not sure if this would make a difference, but for the masked edit control I ahve the following events defined:

maskededit_TypeValidationCompleted
maskededit_KeyDown
maskededit_DoubleClick
maskededit_Leave

And below is the hierarchy of my controls:

-----------
windows form
-----------
composite
-----------
maskediedit
-----------
-----------
-----------

Environment: c# using visual studio 2008
0
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Question by:Mydeen Yussouf
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8 Comments
 
LVL 86

Expert Comment

by:Mike Tomlinson
ID: 37772247
You could raise a custom event from the MaskedTextBox:
    public partial class UserControl1 : UserControl
    {
        public UserControl1()
        {
            InitializeComponent();
        }

        public delegate void UserControlLeaveDelegate(UserControl1 uc, string value);
        public event UserControlLeaveDelegate UserControlLeave;

        private void maskedTextBox1_Leave(object sender, EventArgs e)
        {
            if (UserControlLeave != null)
            {
                UserControlLeave(this, maskedTextBox1.Text);
            }
        }

    }

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LVL 86

Accepted Solution

by:
Mike Tomlinson earned 500 total points
ID: 37772251
Here's the form trapping the custom event:
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void userControl11_UserControlLeave(UserControl1 uc, string value)
        {
            Console.WriteLine(value);
        }

    }

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LVL 1

Author Comment

by:Mydeen Yussouf
ID: 37772417
great help thanks! But I can see that the custom leave evetn as well as the maskededit_KeyDown event both are fired only when I press the same key (tab) twice but not the first time...any idea there?
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LVL 86

Expert Comment

by:Mike Tomlinson
ID: 37772450
Where was the focus before you hit the tab key twice?  Where does focus move to on the first tab?
0
 
LVL 1

Author Comment

by:Mydeen Yussouf
ID: 37772500
Just in case the whole class is below. In addition I have the custom event handler in the containing form as you have recommended, but the event fires only the 2nd time I press the tab key!!!!!! thanks in advance:

namespace TxDateTimePicker
{
    public partial class TxDateTimeControl : UserControl
    {
        private string m_DateTimeSelected;

        public delegate void UserControlLeaveDelegate(TxDateTimeControl uc, string value);
        public event UserControlLeaveDelegate UserControlLeave;


        public TxDateTimeControl()
        {
            InitializeComponent();
        }

        private void TxDateTimeControl_Load(object sender, EventArgs e)
        {
            mtbDateTime.ValidatingType = typeof(System.DateTime);
            mtbDateTime.TypeValidationCompleted += new TypeValidationEventHandler(mtbDateTime_TypeValidationCompleted);
        }

        private void mtbDateTime_TypeValidationCompleted(object sender, TypeValidationEventArgs e)
        {
            if (!e.IsValidInput)
            {
                ttErrorMsg.ToolTipTitle = "Invalid Date";
                ttErrorMsg.Show("The data you supplied must be a valid date in the format mm/dd/yyyy.", mtbDateTime, 25, -60, 5000);
            }
        }


        private void mtbDateTime_DoubleClick(object sender, EventArgs e)
        {
            mtbDateTime.Text = System.DateTime.Today.ToString("MM/dd/yyyy");
            m_DateTimeSelected = mtbDateTime.Text;
        }

        private void mtbDateTime_Leave(object sender, EventArgs e)
        {
            //m_DateTimeSelected = mtbDateTime.Text;
            if (UserControlLeave != null)
            {
                UserControlLeave(this, mtbDateTime.Text);
            }

        }

        public string DateTimeSelected {
            get { return m_DateTimeSelected; }
            set { m_DateTimeSelected = value; mtbDateTime.Text = m_DateTimeSelected; }
        }
    
    }
}

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LVL 86

Expert Comment

by:Mike Tomlinson
ID: 37772578
It's working for me with only ONE tab.  What else is on the form?
0
 
LVL 1

Author Comment

by:Mydeen Yussouf
ID: 37772966
On the form I have other typical windos controls. What I found is when I traverse using tab key to arricve at this control then it works fine, a single tab is sufficient to move it to the next control. But if I use a mouse click (single or double) then it requires two tabs.

For now as a work around I ahve removed the masked edit in the composite control and using a text box, to avoid this.

thanks
0
 
LVL 86

Expert Comment

by:Mike Tomlinson
ID: 37772994
I still can't reproduce the symptom.  Even when clicking, or double clicking into the control, a single tab takes me out.
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