C# Call Event Handler Dynamic

Question

I am trying to save all the controls from one WebForm using a serialized Dictionary (controlId - string, controlValue - string). Next i want to deserialize that Dictionary and dynamically fill the controls with their values.

The problem is that some of my controls have AutoPostBack true and also event handlers. Is there a way to dynamically call these event handlers? I want to avoid another switch by control's id.

Ex:

foreach (KeyValuePair<string, string> kvp in dict)
{
    Control c = findControlRecursive(Page, kvp.Key);
    if (c != null)
    {
        switch (c.GetType().Name)
        {
            case "TextBox":
                ((TextBox)c).Text = kvp.Value;
                if (((TextBox)c).AutoPostBack) .......

EDIT:

Let's say that I have 10 different forms. each has about 50 controls. I want to add/edit a set of data. I try to avoid tables in database with columns for each control, that's why I want to use serialization.

All these controls and their values are available to you on the postback anyway? — IrishChieftain
– IrishChieftain, Commented May 31, 2012 at 12:59
Yes... I retrieve the serialized dictionary from database and i deserialize it... — claudiu.nicola
– claudiu.nicola, Commented May 31, 2012 at 13:01

platon · Accepted Answer · 2012-05-31 13:04:14Z

1

From my point of view you are trying to reinvent a wheel. ASP.NET provides the WebUserControl class which can be used on different pages and works as a container for a set of controls. You can define event handlers for these controls and they will be called appropriately regardless the page you are using them on.

So, I would suggest that you use the WebUserControl based approach without serializing / deserializing controls. This is an easy and effective solution.

answered May 31, 2012 at 13:04

platon

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5 Comments

claudiu.nicola Over a year ago

this form/page has lots of controls... i want to save their values in a database and then to load them back, but without creating tables with columns for each field...

platon Over a year ago

OK, if so, UserControl is a way to go. You can set control values manually and events will work properly :). You should just keep all your controls on the UserControl.

claudiu.nicola Over a year ago

i don't think UserControl is what i need... i need to have these values in a database

claudiu.nicola Over a year ago

Page.aspx?Id=125 should fill my form with values from database. I try to avoid creating a table(Id, Control1, Control2, Control3... Control50), that's why i was thinking at dynamic serialize the entire form, dynamic deserialize it and fill the form. I managed to fill the controls with their values, but some of those controls have eventhandlers that should fire once they have values. (sorry for my english)

claudiu.nicola Over a year ago

...can you tell me how to obtain information about event handlers associated with controls? for example, the event name a DropDownList should fire on SelectedIndexChanged

claudiu.nicola · Accepted Answer · 2012-07-12 06:02:16Z

0

I found it later... i was looking for:

if (((TextBox)c).AutoPostBack) (c as IPostBackDataHandler).RaisePostDataChangedEvent();

answered Jul 12, 2012 at 6:02

claudiu.nicola

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