Databases
StackOverflow2013
Postsdbo
POManaging EventHandlers within a large Form
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POManaging EventHandlers within a large Form
    primarykey
    data
    text
    <p>I'm developing a WinForm application and I've done a pretty bad job thus far of managing the size and contents. I was hoping someone could give me an example of how to break out some of the logic that I have within the main form cs file.</p> <p>Here is an example of an EventHandler function that I have within my MainWindow.cs:</p> <pre><code> private void GroupBoxRequestTypeCheckedChanged(object pSender, EventArgs pEventArgs) { RadioButton vRadioButton = pSender as RadioButton; if (vRadioButton != null) { this.fSelectedButton = vRadioButton.Checked ? vRadioButton : null; if (vRadioButton.Equals(this.RadioButton_Copy) || vRadioButton.Equals(this.RadioButton_Delete) || vRadioButton.Equals(this.RadioButton_Download) || vRadioButton.Equals(this.RadioButton_Move) || vRadioButton.Equals(this.RadioButton_Upload)) { this.GroupBox_Files.Enabled = true; this.GroupBox_Variables.Enabled = false; } else { this.GroupBox_Files.Enabled = false; this.GroupBox_Variables.Enabled = true; } if (this.fSelectedButton != null) { if (this.fSelectedButton.Equals(this.RadioButton_Delete)) { this.TextBox_DestinationFile.Enabled = false; this.Button_DestinationBrowse.Enabled = false; } else { this.TextBox_DestinationFile.Enabled = true; this.Button_DestinationBrowse.Enabled = true; } } } } </code></pre> <p>So this is simply one of many EventHandler's that I have within a Form. I created a MainForm which has a Tabbed Pane and has a collection of Tabs which have buttons, textboxes, checkboxes etc in each tab. All of the events that I handle go into the MainForm.cs file and now I've got close to 1,000 lines in this one file.</p> <p>Can someone give me a simple example (or a article/document) detailing good structure? Can I define my EventHandler functions in a separate class (if so, how would this work...) Do I create some sort of static Helper class where I simply pass the instance of the objects i need to manipulate? I.E.</p> <pre><code> private void GroupBoxRequestTypeCheckedChange(object pSender, EventArgs pEventArgs) { HelperClass.HandleGroupBoxRequestTypeCheckedChanged(pSender, pEventArgs, this); } </code></pre> <p>Where 'this' is the Form itself which has all the references to the objects I need to manipulate?</p> <p>It's probably worth noting that I've learned a good bit about the Cross-Thread calls and I've started making Extension methods for many instances that I need which are simplistic.</p> <p>Another question - I notice that the Visual Designer automatically makes all Components created with it private by default, is it in general a bad idea to make these internal and use the form object to reference these components as needed from outside the class? If it is not a good idea, what is better?</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USTada
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POManaging EventHandlers within a large Form
      1. USTada
      1. VTFavorite
    1. COI've spent the last month untangling an entire app like this for a customer. Hell on wheels. You are right to look to refactor. If you have tabs then you immediately have a logical place to break out your code. Considerusing UserControls for each tab.
      singulars
      1. POManaging EventHandlers within a large Form
      1. UStcarvin
    2. CO@tcarvin - I haven't used UserControls yet at all - Would the Tab itself be a UserControl or would I go as far as breaking out each individual Tab as a UserControl?
      singulars
      1. POManaging EventHandlers within a large Form
      1. USTada
    3. COUsercontrols are a good way to make your `MainWindow.cs` smaller and slight. You can do everything within these controls what you could do in the "normal" `Form` and you can reuse them, if it takes need that some kind of controls needs to be shown up more than one time. Anyway, each tab itself would be an usercontrol. You can setup a Method in `MainWindow.cs` to load all required usercontrols on startup in the tabcontrol/tabpane.
      singulars
      1. POManaging EventHandlers within a large Form
      1. USvarg
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload