Get access to parent control from user control - C

Question

How do I get access to the parent controls of user control in C   winform   I am using the following code but it is not applicable on all types controls such as ListBox   Control   Co   this TopLevelControl Controls Find  label7   true   Co 0  Text    HelloText    Actually  I have to add items in Listbox placed on parent  Form  from a user control

User · Answer

You can use Control Parent to get the parent of the control or Control FindForm to get the first parent Form the control is on  There is a difference between the two in terms of finding forms  so one may be more suitable to use than the other       The control s Parent property value might not be the same as the Form   returned by FindForm method  For example  if a RadioButton control is   contained within a GroupBox control  and the GroupBox is on a Form    the RadioButton control s Parent is the GroupBox and the GroupBox   control s Parent is the Form

User · Answer

Control has a property called Parent  which will give the parent control  http   msdn microsoft com en-us library system windows forms control parent aspx  eg Control p   this Parent

User · Answer

frmMain this Owner  MyListControl Items Add  abc      Make sure to provide access level you want at Modifiers properties other than Private for MyListControl at frmMain

User · Answer

A generic way to get a parent of a control that I have used is   public static T GetParentOfType lt T gt  this Control control        const int loopLimit   100     could have outside method     var current   control      var i   0       do               current   current Parent           if  current    null  throw new Exception  Could not find parent of specified type            if  i    gt  loopLimit  throw new Exception  Exceeded loop limit           while  current GetType      typeof T         return  T Convert ChangeType current  typeof T        It needs a bit of work  e g  returning null if not found or error      but hopefully could help someone   Usage   var parent   currentControl GetParentOfType lt TypeWanted gt       Enjoy

User · Answer

According to Ruskins answer and the comments here I came up with the following  recursive  solution   public static T GetParentOfType lt T gt  this Control control  where T   class       if  control  Parent    null          return null       if  control Parent is T parent          return parent       return GetParentOfType lt T gt  control Parent

User · Answer

If you want to get any parent  by any child control you can use this code  and when you find the UserControl Form Panel or others you can call  funnctions or set get values   Control myControl  this  while  myControl Parent    null         if  myControl Parent  null                myControl   myControl Parent          if   myControl Name    MyCustomUserControl                           MyCustomUserControl myControl  lblTitle Text    FOUND IT

User · Answer

You can get the Parent of a control via  myControl Parent   See MSDN  Control Parent

User · Answer

Description  You can get the parent control using Control Parent   Sample  So if you have a Control placed on a form this Parent would be your Form   Within your Control you can do   Form parentForm    this Parent as Form     More Information   MSDN  Control Parent Property   Update after a comment by Farid-ur-Rahman  He was asking the question      My Control and a listbox  listBox1  both are place on a Form  Form1   I have to add item in a listBox1 when user press a button placed in my Control    You have two possible ways to get this done   1  Use  Control Parent  Sample  MyUserControl      private void button1 Click object sender  EventArgs e                if  this Parent    null    this Parent GetType      typeof MyForm               return           ListBox listBox    this Parent as MyForm  Controls  listBox1   as ListBox          listBox Items Add  Test            or  2     put a property public MyForm ParentForm   get  set    to your UserControl set the property in your Form assuming your ListBox is named listBox1 otherwise change the name   Sample  MyForm  public partial class MyForm   Form       public MyForm                 InitializeComponent            this myUserControl1 ParentForm   this            MyUserControl  public partial class MyUserControl   UserControl       public MyForm ParentForm   get  set         public MyUserControl                 InitializeComponent               private void button1 Click object sender  EventArgs e                if  ParentForm    null              return           ListBox listBox    ParentForm Controls  listBox1   as ListBox           listBox Items Add  Test

User · Answer

Not Ideal  but try this     Change the usercontrol to Component class  In the code editor   build the solution and remove all the code with errors  Related to usercontrols but not available in components so the debugger complains about it   Change the usercontrol back to usercontrol class     Now it recognises the name and parent property but shows the component as non-visual as it is no longer designable

[c#] Get access to parent control from user control - C#

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