MultiColumnComboBox Editor in PropertyGrid

[Randy]

Is there a way to use a multicolumn combo box editor in the PropertyGrid?

I've tried creating my own custom editor inheriting from the RadMultiColumnComboBoxElement, but I can't seem to get it working correctly.

Thanks

[Tom Mieck]

Hi,
Please find the code below

public class MultyColumnComboBoxEditor : BaseInputEditor
    {


        public RadGridView Grid
        {
            get
            {
                return ((RadMultiColumnComboBoxElement)this.EditorElement).EditorControl;
            }
        }
        public override object Value
        {
            get
            {
                return ((RadMultiColumnComboBoxElement)this.EditorElement).SelectedValue;
            }
            set
            {
                ((RadMultiColumnComboBoxElement)this.EditorElement).SelectedValue = value;
            }
        }


        public override void BeginEdit()
        {
            base.BeginEdit();


            this.EditorElement.Focus();
            ((RadMultiColumnComboBoxElement)this.EditorElement).SelectedValueChanged += new EventHandler(MultyColumnComboBoxEditor_SelectedValueChanged);
        }


        public object DataSource
        {
            get
            {
                return ((RadMultiColumnComboBoxElement)this.EditorElement).DataSource;
            }
            set
            {
                ((RadMultiColumnComboBoxElement)this.EditorElement).DataSource = value;
            }
        }


        public string DisplayMember
        {
            get
            {
                return ((RadMultiColumnComboBoxElement)this.EditorElement).DisplayMember;
            }
            set
            {
                ((RadMultiColumnComboBoxElement)this.EditorElement).DisplayMember = value;
            }
        }
        public bool AutoFilter
        {
            get
            {
                return ((RadMultiColumnComboBoxElement)this.EditorElement).AutoFilter;
            }
            set
            {
                ((RadMultiColumnComboBoxElement)this.EditorElement).AutoFilter = true;
                ((RadMultiColumnComboBoxElement)this.EditorElement).AutoFilter = value;
            }
        }
        public string ValueMember
        {
            get
            {
                return ((RadMultiColumnComboBoxElement)this.EditorElement).ValueMember;
            }
            set
            {
                ((RadMultiColumnComboBoxElement)this.EditorElement).ValueMember = value;
            }
        }


        void MultyColumnComboBoxEditor_SelectedValueChanged(object sender, EventArgs e)
        {
            this.OnValueChanged();
        }


        public override bool EndEdit()
        {
            ((RadMultiColumnComboBoxElement)this.EditorElement).SelectedValueChanged -= new EventHandler(MultyColumnComboBoxEditor_SelectedValueChanged);
            return base.EndEdit();
        }


        protected override RadElement CreateEditorElement()
        {
            RadMultiColumnComboBoxElement mccb = new RadMultiColumnComboBoxElement();
            if (mccb.MultiColumnPopupForm.BindingContext == null)
            {
                mccb.MultiColumnPopupForm.BindingContext = new BindingContext();
            }


            return mccb;
        }


        public override Type DataType
        {
            get { return typeof(string); }
        }
    }


put this code in the editorrequired event in the propertygrid
 void radPropertyGrid1_EditorRequired(object sender, PropertyGridEditorRequiredEventArgs e)
        {
MultyColumnComboBoxEditor mccb = new MultyColumnComboBoxEditor();
               
                e.EditorType = typeof(MultyColumnComboBoxEditor);
              
datatable employee= getdata();


                mccb.DisplayMember = "Name";
                mccb.ValueMember = "ID";
                mccb.DataSource = employee
;
                e.Editor = mccb;
                
                mccb.AutoFilter = true;
}

let me know if u have any other questions

[Randy]

Thanks, that was exactly what I needed!

[Ivan Petrov]

Hello Tom and Randy,

Thank you both for writing.

Tom's solution is exactly the way to go in the situation. 

If you have further questions, do not hesitate to write back.
 
Kind regards,
Ivan Petrov
the Telerik team

[Tom Mieck]

Hi randy,
I have one question,please help me out.
In propertygrid , when user  expand and collapse one category section the order of the items getting dispersed

lets say i have category1 which contains employee,department fields(----this is the default order am showing)

order:
category1:
employee
department


when user clicks on  arrow icon(it will collapse that section,and again click on the same icon ) then items order of the items is changing i.e department,employee

changed order:
category1:
department
employee


department coming first, followed by employee  field.

I dont want that behaviour even when user clicks on  expand and collapse arrow icon