ComboBox Issue: Cannot bind to new value member

Question

I\'v got a combobox that I created as a user control(it\'s actually made up of a label, combobox and textbox). I\'m trying to bind a dataset to the combobox datasource, but

Answer 1

I had the same issue and found a solution that may not apply to your problem, but might be helpful for others:

A property marked with the [Browsable(false)]-Attribute will also cause this exception when trying to bind to it.

Answer 2

Moved away from using a Datatset. Created a class("Facilities") that will hold an ID and Name values. Changed "info" to a List type. Then the following code worked just fine:

info.Add(new Facilities { ID = dr["other_facility_id"].ToString(), Name = dr["other_facility_name"].ToString() });

  ((ucComboBox)ctrl).combobox.DataSource = new BindingSource(info, null);//info;
  ((ucComboBox)ctrl).combobox.ValueMember = "ID";
  ((ucComboBox)ctrl).combobox.DisplayMember = "Name";

No issues with binding that.

Answer 3

I had same issue while binding. I reversed the order and everything started working. The original code will look like this

  ((ucComboBox)ctrl).combobox.ValueMember = "radiology_id";
  ((ucComboBox)ctrl).combobox.DisplayMember = "radiology_name";
  ((ucComboBox)ctrl).combobox.DataSource = info;

Answer 4

Surely the fragment of code below is going to cause an issue?

public string value
{
    get { return _value ; }
    set { _value = value; }
}

You need to name this something else e.g. comboValue. "value" represents the implicit variable passed into a property declaration.

i.e.

public string comboValue
{
    get { return _value ; }
    set { _value = value; }
}

Answer 5

I think you have the property Modifiers of your combo to something different from Public.
However I will choose to implement two new public properties at the usercontrol level.
DisplayMember and ValueMember just to avoid that ugly cast.
In the set/get accessor I will reflect the values in/from the internal combo

public string DisplayMember
{ 
    get { return combobox1.DisplayMember; } 
    set { combobox1.DisplayMember = value;} 
} 
public string ValueMember 
{ 
    get { return combobox1.ValueMember; } 
    set { combobox1.ValueMember = value;} 
} 

Answer 6

Also make sure the ID and Name properties are Public otherwise you get the error:
Cannot bind to the new display member.