c# - Associate two classes so a combobox appears with the second class -

i have winforms application. there 2 classes. 1 class stores people contribute book. other class list of possible contribution types (like editor, reviewer, , on).

the bookcontributors class datasource datagridview , works fine. now, want have bookcontributortypes class combobox feeds bookcontributors class.

so far in reading, looks have number of options, including forcing combobox datagridview, using class attributes, creating 1-to-many relationship between classes.

since code have many of these types of situations, want right. think means showing relationship between 2 classes somehow datagridview knows display combobox, not sure how go doing this.

bookcontributors populated person filling out contributor. example: bookcontributor = "john smith"; bookcontributorfileas="smith, john"; bookcontributortype = "rev".

public class bookcontributors : inotifypropertychanged {     private string _bookcontributor;     [descriptionlocalized(typeof(resourcesclassbooks), "bookcontributorcomment")]     [displaynamelocalized(typeof(resourcesclassbooks), "bookcontributordisplayname")]     public string bookcontributor     {         { return _bookcontributor; }         set         {             if (setfield(ref _bookcontributor, value, "bookcontributor"))             {                 // when user types author name, add sorted name sorted field.                 //  ex name = william e raymond                 //  ex file = raymond, william e                 var name = _bookcontributor.split(' ');                 if (name.length >= 2)                 {                     string fileasname = (name[name.length - 1] + ",");                     (int = 0; <= (name.length - 2); i++)                     {                         fileasname = fileasname + " " + name[i];                     }                     bookcontributorfileas = fileasname;                 }             }         }     }      private string _bookcontributorfileas;     [descriptionlocalized(typeof(resourcesclassbooks), "bookcontributorfileascomment")]     [displaynamelocalized(typeof(resourcesclassbooks), "bookcontributorfileasdisplayname")]     public string bookcontributorfileas { { return _bookcontributorfileas; } set { setfield(ref _bookcontributorfileas, value, "bookcontributorfileas"); } }      private string _bookcontributortype;     [descriptionlocalized(typeof(resourcesclassbooks), "bookcontributortypecomment")]     [displaynamelocalized(typeof(resourcesclassbooks), "bookcontributortypedisplayname")]     public string bookcontributortype { { return _bookcontributortype; } set { setfield(ref _bookcontributortype, value, "bookcontributortype"); } }       #region handle property changes     public event propertychangedeventhandler propertychanged;     protected bool setfield<t>(ref t field, t value, string propertyname)     {         //if value did not change, nothing.         if (equalitycomparer<t>.default.equals(field, value)) return false;         //the value did change, make modification.         field = value;         return true;     }     protected virtual void onpropertychanged(string propertyname)     {         propertychangedeventhandler handler = propertychanged;         if (handler != null) handler(this, new propertychangedeventargs(propertyname));     }     #endregion } 

bookcontributortypes (populated list of bookcontributor types xml file). example book contributor type id's: "rev", "edt". example book contributor type descriptions: "reviewer", "editor".

class bookcontributortypes : inotifypropertychanged {     private string _bookcontributortypeid;     [descriptionlocalized(typeof(resourcesclassbooks), "bookcontributortypeidcomment_lkp")]     [displaynamelocalized(typeof(resourcesclassbooks), "bookcontributortypeiddisplayname_lkp")]     public string bookcontributortypeid { { return _bookcontributortypeid; } set { setfield(ref _bookcontributortypeid, value, "bookcontributortypeid"); } }      private string _bookcontributortypedescription;     [descriptionlocalized(typeof(resourcesclassbooks), "bookcontributortypecomment_lkp")]     [displaynamelocalized(typeof(resourcesclassbooks), "bookcontributortypedisplayname_lkp")]     public string bookcontributortypedescription { { return _bookcontributortypedescription; } set { setfield(ref _bookcontributortypedescription, value, "bookcontributortypedescription"); } }       #region handle property changes     public event propertychangedeventhandler propertychanged;     protected bool setfield<t>(ref t field, t value, string propertyname)     {         //if value did not change, nothing.         if (equalitycomparer<t>.default.equals(field, value)) return false;         //the value did change, make modification.         field = value;         return true;     }     protected virtual void onpropertychanged(string propertyname)     {         propertychangedeventhandler handler = propertychanged;         if (handler != null) handler(this, new propertychangedeventargs(propertyname));     }     #endregion } 

all have working right now, without combo box, because not know how implement combobox show selection options bookcontributortypes class:

datagridview1.datasource = bookcontributors; 

thanks ay can provide.

this ended being lot more difficult research thought. turns out, if want place column in datagridview combobox , have combobox interact class, not quick one-liner.

my example has 2 classes:

• bookcontributors (bookcontributors) - list of people have contributed book. example, stores person's name , type of contribution made.
• bookcontributortypes (bookcontributortypes) - list of possible types of contributions book, editor or contributor.
• i want contributortypes class combobox , store user's selection bookcontributors class, bookcontributortype property.

here code came with, along additional notes found along way. best of knowledge, information provide accurate :-)

    gvcontributors.datasource = bookcontributors; //set datgridview's datasource displays class want.     gvcontributors.columns["bookcontributortype"].visible = false; //hide column (property) want replace combobox.      datagridviewcomboboxcolumn contribtype = new datagridviewcomboboxcolumn(); //create combobox object.     contribtype.headertext = "my column"; //the text display in column header.     contribtype.name = "bookcontributortype"; //name of class property set visible=false. note sure if needed.     contribtype.datasource = bookcontributortypes; //name of class provides combobox data.     contribtype.displaymember = "bookcontributortypedescription"; //data user see when clicking combobox.     contribtype.valuemember = "bookcontributortypeid"; //data store in class property.     contribtype.datapropertyname = "bookcontributortype"; //the class property binding in order store data.      gvcontributors.columns.add(contribtype); //add new combobox datagridview. 

what have following:

1. a datagridview datasource. in case, datasource class.
2. a hidden (visible=false) column want make combobox.
3. a datagridviewcombobox links datasource user see list of values. using datapropertyname same name hidden column, binding datagridview's datasource.

another answer on post suggests remove column replacing combobox visible=false seems work me.

when run solution, find user has click twice on combobox. have not tried code yet, think post resolve problem: open dropdown(in datagrid view) items on single click