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Raise an Event in the User Control and check it in aspx page

Posted on 2004-10-24
Medium Priority
Last Modified: 2011-09-20
Hi Expert,

    Iam having one date picker User Control. Iam using that User Control in aspx page. When the user selects the Date,  I need to Raise an Event and have to some checking on the aspx page.
Can any one please help me how can procede with this.

Your help is much appreciated.
Question by:kbraju76
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LVL 28

Expert Comment

ID: 12393980
Hi kbraju76,

i assumer that you use Calendar control
to rise an event on selecting date, you have to assign to the calendar control the event SelectionChanged

 Calendar1.SelectionChanged += new EventHandler(this.Selection_Change);
      void Selection_Change(Object sender, EventArgs e)
        //do your functionality        

AddHandler Calendar1.SelectionChanged, AddressOf Selection_Change
      Sub Selection_Change(sender As Object, e As EventArgs)
        'do your functionality        
      End Sub

also if you want this event to rise every time when you change the date, not only when click on a global submit button
you have to set AutoPostBack=true for the calendar control


Expert Comment

ID: 12394621
In the User control code-behind (.ascx.cs) file,

I am assuming a simple button..

Declare the event as
public event EventHandler Click;

Declare a Method to raise event
protected virtual void OnClick(EventArgs e)
    if (Click != null)

Attach Event handler delegate
this.Button1.Click += new System.EventHandler(this.Button1_Click);

And handle the event
private void Button1_Click(object sender, System.EventArgs e)
    this.Value -= 1;

Hope that helps..

Expert Comment

ID: 12394628
And in the code behind for the Web form that contains the user control..

private void UserControl1_Click(object sender, System.EventArgs e)
LVL 28

Accepted Solution

mmarinov earned 375 total points
ID: 12395243

first of all, please do not post questions as a feed back - Thanks!!
for your question:
the code that i've posted you have to add in the ascx file ( if not use code behind ) or in your code behind file
also you have to replace the Calendar1 with the ID of your calendar control

LVL 28

Expert Comment

ID: 12395514

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