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    WMC Common Events

    There are certain events that all control has. Most of it are very similar to standard ASP. In the coming posts we will see properties and event of each control, for now I will describe the common events and it´s description.

    To call a method when an event occurs we must follow the following syntax:

    <mobile:Command ID="btnBoton" Runat="server" OnInit="Method1">
       Boton
    </mobile:Command>

    The name of the event must be preceded of the word “On”. It means, if we want to call a method when the Init event occurs we should write ‘OnInit=Method1’. The syntax to write a method is:

    <script runat="server">
        void Method1(object sender, EventArgs e)
        {
            btnBoton.Text = "Boton cambiado";
        }
    </script>

    The method receives two parameters: the first, is the object from where we are getting the method, and in second place,  an EventArgs type that can be used by the developer by using different optional arguments for the event.

    Now, as we said at the beginning  there common events between the WMC, and they are:

    DataBinding
    It occurs when the control is vinculated with a data source. This event ask to the server for the logical data that it is writed for him.

    Disposed
    When a control is no longer exists the last event that occurs is this. The control was disposed from memory.

    Init
    This event constitute the first stage when a control is initialized from the server.

    Load
    Occurs when the page is loaded.

    UnLoad
    This event occurs when the page in unloaded.

    PreRender
    This event occurs after the page is loaded, but before the page is rendered. This method can be used, for example, when you want to make a change in the ViewState property of any control, like this (try this example in a new website):

    <html xmlns="http://www.w3.org/1999/xhtml" >
    <body>
        <mobile:Form id="Form1" runat="server">
            <mobile:Command ID="btnBoton1" Runat="server" OnPreRender="Method1">
                Boton
            </mobile:Command>
        </mobile:Form>   

        <script runat="server">
            void Method1(object sender, EventArgs e)
            {
                btnBoton1.EnableViewState = false;
            }
        </script>
    </body>
    </html>

    Well, today we talked about the common events of the WMC´s. In the followings posts we will see each control specifically, their properties, events and methods.

    See you soon.

    August 13 1:21 AM | Blog it

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