Question

I have a Parent Form that holds a ‘HUD’ with First Name, Last Name, etc. One of the child forms is a Search Form. When the user selects a member from the results that are displayed in a DataGrid I want the pertinent information to fill in the HUD. I created a HUD class with variables for each value and a method called UpdateHUD(). I am unsure how to get this working. I have a reference to the Search Form of the Parent form containing the HUD, like so:

public frmWWCModuleHost _frmWWCModuleHost; 

This is the code I use to embed forms. I am not using MDI.

 public static void ShowFormInContainerControl(Control ctl, Form frm)     {         frm.TopLevel = false;         frm.FormBorderStyle = FormBorderStyle.None;         frm.Dock = DockStyle.Fill;         frm.Visible = true;         ctl.Controls.Add(frm);     } 

Here is the code I am running on Cell Click on the Search Form. This is from before I tried implementing the HUD class.

private void dgvSearchResults_CellContentClick(object sender, DataGridViewCellEventArgs e)     {         _frmWWCModuleHost = new frmWWCModuleHost();         _frmWWCModuleHost.tbxHUD_LastName.Text = dgvSearchResults.CurrentRow.Cells[1].FormattedValue.ToString();         _frmWWCModuleHost.tbxHUD_LastName.Invalidate();         _frmWWCModuleHost.FormPaint();     } 

Thanks in advance!

~ Patrick

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EDIT

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dgvSearchResults_CellContentClick is now current. When I step through this code it is getting the correct Value here but it is never updating the actual HUD.

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EDIT 2

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Is my problem that I am declaring a NEW frmWWCModuleHost instead of passing a ref to the existing? I am still pretty weak in my understanding of this.

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EDIT 3

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I have ‘solved’ this by doing the following: On the Parent Form where I declare the Child Form I pass this as a param. Then in the constructor of the child form I added _frmWWCModuleHost = m_parent; I have a UpdateHUD() method on my Parent form and I call it from the _CellClick event on the child.

Now to rephrase my question; Is there anything glaringly wrong with doing it this way?

Answer 1

When the child form search completes, raise a ‘SearchCompleted’ event. Then anything (including the parent form) can subscribe to that event and retrieve the details.

See the following NotepadCode for an example:

class ParentForm {     private readonly ChildForm childForm;      public ParentForm()     {         InitializeComponent();          childForm = new ChildForm();          childForm.SearchCompleted += childForm_SearchCompleted;     }      private void childForm_SearchCompleted(object sender, SearchCompletedEventArgs e)     {         // Update the display         lblName.Text = e.DataToDisplay;     } }  class ChildForm {     public event EventHandler<SearchCompletedEventArgs> SearchCompleted;      private void Search(string query)     {         // Do the searching          OnSearchCompleted(new SearchCompletedEventArgs([arg values]));     }      public void OnSearchCompleted(SearchCompletedEventArgs args)     {         if (SearchCompleted != null)         {             SearchCompleted(this, args);         }     } }