[Solved] Setting value in unbound checkbox to binding source

[Ruth Goldberg]

I have an editable checkbox on a grid that I want to set to true if another field is "Y" and false otherwise. I can't use an expression because then the checkbox is not editable. I am able to change the data source when the check box is clicked but I'm having a problem initializing the checkbox with the correct value. Which event is the proper place to do so?

[Jack]

Hi Ruth Goldberg,

That's interesting scenario. Currently RadGridView doesn't support it directly. I added this as a feature request and we will consider implementing it in a future version of our grid. I updated also your Telerik points for this feature request. Nevertheless, you can implement the scenario by using a custom column, cell, and editor. Please consider the code snippet below:

this.radGridView1.MasterGridViewTemplate.AutoGenerateColumns = false;
this.radGridView1.Columns.Add(new CustomCheckBoxColumn("Bool"));
this.radGridView1.DataSource = table;

public class CustomCheckBoxColumn : GridViewCheckBoxColumn
{
    public CustomCheckBoxColumn(string fieldName)
        : base(fieldName)
    {
    }

    public override Type GetCellType(GridViewRowInfo row)
    {
        if (row is GridViewDataRowInfo)
        {
            return typeof(CustomCheckBoxCell);
        }
        return base.GetCellType(row);
    }
}

public class CustomCheckBoxCell : GridDataCellElement
{
    private CustomCheckBoxEditor checkBoxEditor;

    public CustomCheckBoxCell(GridViewColumn column, GridRowElement row)
        : base(column, row)
    {
    }

    protected override Type ThemeEffectiveType
    {
        get { return typeof(GridCheckBoxCellElement); }
    }

    public override IInputEditor Editor
    {
        get
        {
            return this.checkBoxEditor;
        }
    }

    protected override void OnLoaded()
    {
        base.OnLoaded();
        this.GridControl.EditorManager.RegisterPermanentEditorType(typeof(CustomCheckBoxEditor));
    }

    protected override void CreateChildElements()
    {
        base.CreateChildElements();
        this.checkBoxEditor = new CustomCheckBoxEditor();
        this.Children.Add(this.checkBoxEditor.EditorElement);
    }

    protected override void SetContentCore(object value)
    {
        if (this.GridControl.IsInEditMode && this.IsCurrent)
        {
            return;
        }

        this.checkBoxEditor.BeginInit();
        this.checkBoxEditor.Value = value;
        this.checkBoxEditor.EndInit();
    }
}

public class CustomCheckBoxEditor: RadCheckBoxEditor
{
    public override object Value
    {
        get
        {
            if ((bool)base.Value == true)
            {
                return 'Y';
            }
            return 'N';
        }
        set
        {
            if (value is char)
            {
                if ((char)value == 'Y')
                {
                    base.Value = Telerik.WinControls.Enumerations.ToggleState.On;
                }
                else
                {
                    base.Value = Telerik.WinControls.Enumerations.ToggleState.Off;
                }
            }
            else
            {
                base.Value = value;
            }
        }
    }
}

Should you have other questions, don't hesitate to ask.

Kind regards,

Jack
the Telerik team

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[Ruth Goldberg]

Thanks.