Multiline PropertyGridTextBoxEditor

[Chris Gethin]

Hi,

Is it possible to set a PropertyGridTextBoxEditor to be multiline?

I have tried the following approach, but although the Multiline property does successfully get set to true, the textbox does not display as such.

 

 

private void detailsPropertyGrid_EditorInitialized(object sender, PropertyGridItemEditorInitializedEventArgs e)
        {
            switch (e.Item.Name)
            {
                case "Details":
                    PropertyGridTextBoxEditor editor = e.Editor as PropertyGridTextBoxEditor;
                    editor.Multiline = true;
                    break;
                default:
                    return;
            }
        }

Thanks,

Chris.

[Ivan Petrov]

Hello Chris,

Thank you for writing.

The RadPropertyGrid items have a fixed size and they cannot be resized to take a multiline text box. You can create a custom editor to show a bigger element containing a multiline text box. You can read more on creating a custom editor in out online documentation.

I hope this will be useful. If you have further questions, I would be glad to help.

All the best,
Ivan Petrov
the Telerik team

[Andreas]

Is there still no other possibility to create Multiline Textbox?

[Dess | Tech Support Engineer, Principal]

Hello, Andreas, 

Thank you for writing.  

In order to enable multiline PropertyGridTextBoxEditor you can refer to the following code snippet:

public RadForm1()
{
    InitializeComponent();
    this.radPropertyGrid1.SelectedObject = new Item(123, "First row" + Environment.NewLine + "Second row",DateTime.Now );
    this.radPropertyGrid1.EditorInitialized+=radPropertyGrid1_EditorInitialized;
    this.radPropertyGrid1.ItemHeight = 50;
}

private void radPropertyGrid1_EditorInitialized(object sender, Telerik.WinControls.UI.PropertyGridItemEditorInitializedEventArgs e)
{
    PropertyGridTextBoxEditor editor = e.Editor as PropertyGridTextBoxEditor;
    if (editor!=null)
    {
        editor.Multiline = true;
    }
}

public class Item
{
    public int Id { get; set; }

    public string Name { get; set; }

    public DateTime CreatedOn { get; set; }

    public Item(int id, string name, DateTime createdOn)
    {
        this.Id = id;
        this.Name = name;
        this.CreatedOn = createdOn;
    }
}

I hope this information helps. Should you have further questions I would be glad to help.
 
Regards,
Dess
Progress Telerik

[Andreas]

works fine. But how can I add more than 1 Multiline Item to property grid?

Is it possible to add lines by List for example?

[Dess | Tech Support Engineer, Principal]

Hello, Andreas, 

Thank you for writing.  

Each property of the RadPropertyGrid.SelectedObject is displayed as a PropertyGridItem. You can add as many string properties as you wish that contain multiline data. However, if you have a property of type List<string> and want to display it as multiline text and edit this text, you can use a custom TypeConverter. I have prepared a sample code snippet which result is illustrated in the attached gif file: 

public partial class RadForm1 : Telerik.WinControls.UI.RadForm
{
    public RadForm1()
    {
        InitializeComponent();
        this.radPropertyGrid1.SelectedObject = new Item(123, "First row" + Environment.NewLine + "Second row",DateTime.Now);
        this.radPropertyGrid1.EditorInitialized += radPropertyGrid1_EditorInitialized;
        this.radPropertyGrid1.ItemHeight = 50;
    }

    private void radPropertyGrid1_EditorInitialized(object sender, Telerik.WinControls.UI.PropertyGridItemEditorInitializedEventArgs e)
    {
        PropertyGridTextBoxEditor editor = e.Editor as PropertyGridTextBoxEditor;
        if (editor != null)
        {
            editor.Multiline = true;
        }
    }

    public class Item
    {
        public int Id { get; set; }

        public string Name { get; set; }

        public DateTime CreatedOn { get; set; }

        [Editor(typeof(PropertyGridTextBoxEditor), typeof(BaseInputEditor))]
        [TypeConverter(typeof(MyTypeConverter))]
        public List<string> TextItems { get; set; }

        public Item(int id, string name, DateTime createdOn)
        {
            this.Id = id;
            this.Name = name;
            this.CreatedOn = createdOn;
            this.TextItems = new List<string>() { "one", "two", "three" };
        }
    }

    public class MyTypeConverter:TypeConverter
    {
        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
        {
            if (destinationType == typeof(string))
            {
                return true;
            }
            return base.CanConvertTo(context, destinationType);
        }

        public override object ConvertTo(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value, Type destinationType)
        {
            if (destinationType == typeof(string))
            {
                List<string> textItems = value as List<string>;
                if (textItems != null)
                {
                    return String.Join(Environment.NewLine, textItems);
                }
                return true;
            }
            return base.ConvertTo(context, culture, value, destinationType);
        }

        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            if (sourceType == typeof(string))
            {
                return true;
            }
            return base.CanConvertFrom(context, sourceType);
        }

        public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value)
        {
            if (value == null)
            {
                return new List<string>();
            }
            string text = value.ToString();
            string[] tokens = text.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
            return tokens.ToList();
        }
    }
}

I hope this information helps. Should you have further questions I would be glad to help.
 
Regards,
Dess
Progress Telerik