Questions on UI for WinForms Forum

2 answers

294 views

Hello!

Is it possible not to close dropdownlist panel when I select some items?
For example, I have smth like treeview (not true treeview, but imagine):
Master Item:
item1
item2
item3
and so on.

For now I use the following code:

if (e.Position == 1)//Master item position == 1.

{

e.Cancel = true;

return;

}

...

Selected text(index) doesn't change, but it would be more convinient
and elegant if dropdownlist panel won't close if I select "Master Item:".
Is it possible?

Thanks in advance.

DropDownList

answered on 05 Sep 2011

4 answers

131 views

HTML like formatting in a group header row

Hi,

Is it possible to do any HTML like formatting in a group header row? I'm currently changing the header in GroupSummaryEvaluate event right now.

Thanks!

GridView

answered on 05 Sep 2011

4 answers

232 views

Determine if document has changed

Is there an easy way to determine if the open document has any changes?

I want to prompt the user to see if they want to save the document when they try to close the document or open a new one, but only if the document has changed.

Thanks.

RichTextBox (obsolete as of Q3 2014 SP1)

answered on 02 Sep 2011

4 answers

252 views

Email link format mailto:{0} doesnt work in the radgridview

I have a small question. I'm trying to display the user email addressin a datagrid for winform and i have tried everything to make it look like a link and it doesnt work. All I want is the user to be able to click the email address to be able to sendan email to the selected address.
Can anyone help me out here by letting meknow whats the format to use? Remember I'm looking for the Radgridview for Winforms not the ASP.net one..

Thanks in advance

Jose

GridView

answered on 02 Sep 2011

10 answers

273 views

Q2 2011 DateTimePicker nulldate

Hi,

With Q2 2011 DateTimePicker if I set the NullDate to DateTime.Today.AddSeconds(1) I can not set the date to today's date as it shows up blank (null) as soon as I choose todays date. If I choose the day before or after today it works. Did something break in this version or am I missing something? Also, it would be nice if by default if the user hits the delete key anywhere within the date text that the value is set to null and the textbox is cleared. It is a problem to our users when the delete button is hit in the year field and it just changes to 0001 as in your examples.

I followed this thread to set nulldate to today to avoid having the calendar show or 0001 for the year. http://www.telerik.com/community/forums/winforms/calendar-and-datetimepicker/setting-mindate-but-not-value.aspx

Thanks!

Calendar, DateTimePicker, TimePicker and Clock

answered on 02 Sep 2011

3 answers

234 views

Multiple Child Templates

Hi there,

I'm currently evaluating the Telerik RadControls for WinForms and I'm trying to accomplish something with the DataGrid component. I am wondering if there is any way to specify different child templates for the top level rows in the grid.

I have a dataset that consists of a List<ICommonData>. I have 2 classes (say ClassA and ClassB) that implement ICommonData. My datasource contains a list of both ClassA and ClassB objects. The parent rows of the grid show all the properties declared in ICommonData. What I want is when the user expands the parent row, I want them to see a sub grid that shows other ClassA or ClassB columns depending on what data object that row was bound to. Basically I need the ability to specify dynamically which template each row uses when displaying the child grid.

Is there any way to do this?

Thanks,
Josh

GridView

answered on 02 Sep 2011

6 answers

265 views

Set the focus to an element in a custom cell editor

Hi,
I have a custom cell editor that contains a TextBox and a Button. The user can edit the text directly or press the button to display a dialog. Using the examples I found I could implement nearly everthing but one thing is missing:
When editing starts I would like to set the focus to the TextBox in theeditor and select the contained text, so that the user can start typing immediately. Just the behaviour of the normal GridViewTextBoxColumn. In my editor an extra click is required to start typing. The call to Focus() seems to have no effect.

Thanks in advance
Christoph

(Using Q2 2011 on .NET 3.5)

This is what I did:

My custom GridViewDataColumn:

public class IntelliBoxColumn : GridViewDataColumn

{

public IntelliBoxColumn(string columnName) : base(columnName) { }

public override Type GetDefaultEditorType()

{

return typeof(IntelliBoxGridEditor);

}

public override Type GetCellType(GridViewRowInfo row)

{

if (row is GridViewDataRowInfo)

{

return typeof(IntelliBoxCellElement);

}

return base.GetCellType(row);

}

My custom EditorElement:

public partial class IntelliBoxEditorElement : LightVisualElement

{

RadTextBoxItem textBox;

RadButtonElement button;

public RadTextBoxItem TextBox { get { return this.textBox;}}

public RadButtonElement Button { get { return this.button; } }

protected override void CreateChildElements()

{

textBox = new RadTextBoxItem();

textBox.RouteMessages = true;

button = new RadButtonElement("...");

button.Padding = new Padding(2, 0, 2, 0);

this.Children.Add(textBox);

this.Children.Add(button);

}

protected override SizeF ArrangeOverride(SizeF finalSize)

{

RectangleF clientRect = GetClientRectangle(finalSize);

RectangleF buttonRect = new RectangleF(clientRect.Right - button.DesiredSize.Width, clientRect.Top,

button.DesiredSize.Width, clientRect.Height);

RectangleF textRect = new RectangleF(clientRect.Left, clientRect.Top + (clientRect.Height - textBox.DesiredSize.Height) / 2,

buttonRect.Left - clientRect.Left - 2, textBox.DesiredSize.Height);

foreach (RadElement element in this.Children)

{

if (element == this.textBox)

{

element.Arrange(textRect);

}

else if (element == this.button)

{

element.Arrange(buttonRect);

}

else

{

ArrangeElement(element, finalSize);

}

return finalSize;

}

My custom GridEditor:
I try to set the focus in BeginEdit() but this has no effect.

public class IntelliBoxGridEditor : BaseGridEditor

{

private bool endEditOnLostFocus = false;

protected override Telerik.WinControls.RadElement CreateEditorElement()

{

return new IntelliBoxEditorElement();

}

private IntelliBoxEditorElement IntelliBox

{

get { return (IntelliBoxEditorElement)EditorElement; }

}

public override bool EndEditOnLostFocus

{

get { return endEditOnLostFocus; }

}

public override object Value

{

get { return IntelliBox.Text;}

set

{

string strValue = string.Empty;

if (value != null && value != DBNull.Value) strValue = value.ToString();

IntelliBox.TextBox.Text = strValue;

}

public override Type DataType

{

get { return typeof(string);}

}

public override void BeginEdit()

{

base.BeginEdit();

IntelliBox.TextBox.TextChanging += new TextChangingEventHandler(TextBox_TextChanging);

IntelliBox.TextBox.TextChanged += new EventHandler(TextBox_TextChanged);

IntelliBox.TextBox.KeyDown += new KeyEventHandler(TextBox_KeyDown);

IntelliBox.Button.Click += new EventHandler(Button_Click);

IntelliBox.TextBox.SelectAll();

IntelliBox.TextBox.Focus();

}

public override bool EndEdit()

{

IntelliBox.TextBox.TextChanging -= new TextChangingEventHandler(TextBox_TextChanging);

IntelliBox.TextBox.TextChanged -= new EventHandler(TextBox_TextChanged);

IntelliBox.TextBox.KeyDown -= new KeyEventHandler(TextBox_KeyDown);

IntelliBox.Button.Click -= new EventHandler(Button_Click);

return base.EndEdit();

}

void TextBox_TextChanging(object sender, TextChangingEventArgs e)

{

ValueChangingEventArgs args = new ValueChangingEventArgs(e.NewValue);

args.OldValue = e.OldValue;

OnValueChanging(args);

e.Cancel = args.Cancel;

}

void TextBox_TextChanged(object sender, EventArgs e)

{

OnValueChanged();

}

void TextBox_KeyDown(object sender, KeyEventArgs e)

{

RadGridView grid = ((RadElement)sender).ElementTree.Control as RadGridView;

if (grid != null)

{

switch (e.KeyCode)

{

case Keys.Escape:

case Keys.Enter:

case Keys.Up:

case Keys.Down:

grid.GridBehavior.ProcessKeyDown(e);

break;

}

void Button_Click(object sender, EventArgs e)

{

endEditOnLostFocus = false;

var gridView = (WPDataGrid)IntelliBox.ElementTree.Control;

gridView.RaiseButtonClicked(this);

endEditOnLostFocus = true;

gridView.EndEdit();

}

My custom GridDataCellElement:
(The puspose of this cell-element is to start editing as soon as cell becomes current. I did not manage to get this behaviour by setting BeginEditMode)

public class IntelliBoxCellElement : GridDataCellElement

{

private RadLabelElement _label;

private IntelliBoxColumn _column;

private GridRowElement _row;

public IntelliBoxCellElement(GridViewColumn column, GridRowElement row)

: base(column, row)

{

this.BackColor = Color.White;

}

private bool _wasCurrent;

public override bool IsCurrent

{

get { return base.IsCurrent; }

set

{

base.IsCurrent = value;

if (value && value != _wasCurrent)

_row.RowInfo.Cells[_column.Name].BeginEdit();

_wasCurrent = value;

}

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

public override void Initialize(GridViewColumn column, GridRowElement row)

{

_column = (IntelliBoxColumn)column;

_row = row;

base.Initialize(column, row);

}

protected override void CreateChildElements()

{

_label = new RadLabelElement();

_label.Margin = new Padding(2, 2, 2, 2);

_label.LabelText.AutoEllipsis = true;

_label.LabelText.AutoSize = true;

_label.LabelText.AutoSizeMode = RadAutoSizeMode.Auto;

_label.LabelText.TextWrap = false;

this.Children.Add(_label);

}

protected override void DisposeManagedResources()

{

base.DisposeManagedResources();

}

protected override void SetContentCore(object value)

{

if (value != null)

{

_label.Text = value.ToString();

}

public override bool IsCompatible(GridViewColumn data, object context)

{

return data is IntelliBoxColumn && context is GridDataRowElement;

}

GridView

answered on 02 Sep 2011

1 answer

108 views

RadGridView background color on text problem

When I view entries in my RadGridView that users have submitted that contain a text background color (in HTML) I get these weird spots of 1px whitespace in-between words. Please look at my attachment for reference. I was wondering if there is anyway to fix this?

GridView

answered on 02 Sep 2011

2 answers

196 views

RightClick on a RadPageViewPage

Hello,

how can I get a Right-Click from a RadPageViewPage? The MouseClick-Event only fires, when the User clicks on the Content-Area, not the "Header". And the Mouse-Click-Event from the RadPageView will be fired, but I don't get the clicked Page there.

I'm using the ExplorerBar-Mode.

Thank you!
Andy

PageView

answered on 02 Sep 2011

3 answers

210 views

Display of the selected element

hi, i have a multicolumncombox object on my form, i only display the first column.
The cell width is larger than the multicolumncombox, so when i select an item, it's right aligned in the multicolumncombobox object like the screenshot.

Optionnaly i don't want the control to be highlighted when i change selected item.

thanks

MultiColumn ComboBox

answered on 02 Sep 2011