Grid just populated with few rows, so there is an empty area below those rows.
Multiselection is enabled.
Grid has just been populated, so there are no selected rows.
If I click on the empty area below the rows, I get this exception:
System.Exception: Exception caught by
CurrentDomain.UnhandledException - type: System.NullReferenceException value:
System.NullReferenceException: Object reference not
set
to an instance of an
object
.<br> at
Telerik.WinControls.UI.GridRowBehavior.DoMultiFullRowSelect(GridCellElement
currentCell, Point currentLocation)<br> at
Telerik.WinControls.UI.GridRowBehavior.DoMouseSelection(GridCellElement
currentCell, Point currentLocation)<br> at
Telerik.WinControls.UI.GridRowBehavior.ProcessMouseSelection(Point
mousePosition, GridCellElement currentCell)<br> at
Telerik.WinControls.UI.GridRowBehavior.OnMouseMove(MouseEventArgs e)<br> at
Telerik.WinControls.UI.BaseGridBehavior.OnMouseMove(MouseEventArgs e)<br> at
Telerik.WinControls.UI.RadGridView.OnMouseMove(MouseEventArgs e)<br> at
System.Windows.Forms.Control.WmMouseMove(Message& m)<br> at
System.Windows.Forms.Control.WndProc(Message& m)<br> at
Telerik.WinControls.RadControl.WndProc(Message& m)
if I select a row, before clicking on the empty area, nothing happens.
I could preselect a row, just after populating. but I'd like to understand why this happens
Hi dear Telerik team.
I have a VirtualGrid.
I have made workaround to substitute indent cell of a row with a text, lets call it "row header".
And I would like to know how can I deal to make "row header" looks absolutely the same as "column header" by the easiest way?
Please find attachment bellow.
Much thanks!
Hello,
When I click the tab on the last cell while it is in edit on the grid view, it should not navigate anywhere instead it should stay on the same cell (last cell) for editing.
Currently, when I click on the Tab button it moves to the next control or moves to the next row in the gridlines. Please kindly help me.
Thanks in advance.
Hi,
VirtualGrid highlights a row with selected cell by default,
could you please assist me with information how can I highlight a column too?
Much thanks!
I open all child forms in maxmized state but when i close the form i find all other forms i opened before not maxmized as it appears that any form get maxmized makes all forms that was opened before it lose their maxmized state
i need to make all child forms i open to always stay in maxmized state
I want to let the user to color some words or phrases in a Textbox.
I thought the features of RadTextBoxControl would be good for that. (In between RadTextBox and RichTextEditor)
First handicap, I seem to have no influence on Block Creation, meaning on how the text is split into Blocks.
Than I assign a text like 'Dvoraks "New World" Symphony'
I get Blocks like
Not really what I wanted.
I found no other way than this:
radTextBoxControl1.TextBoxElement.ViewElement.Children.Add(
new
TextBlockElement() {Text =
"Dvoraks"
});
radTextBoxControl1.TextBoxElement.ViewElement.Children.Add(
new
TextBlockElement() {Text =
"\"New World\""
});
radTextBoxControl1.TextBoxElement.ViewElement.Children.Add(
new
TextBlockElement() {Text =
"Symphony"
});
Is this a good way, the recommanded way, to do custom splitting ?
Next: I could not attach a click event to a text block.
I found your Demo with a Button inside a TextBox (implementing ITextBlock on RadButtonElement) this works fine.
But something like this, is just never called (replacing the "new TextBoxElement" with "new TBE" in the above snippet of course)
public class TBE : TextBlockElement
{
protected override void OnClick(EventArgs e)
{
base.OnClick(e);
}
}
Than I tried to subscribe to the Click-Event directly. (The Click Event of the TextBlockElement). No catched event either.
Another try:
radTextBoxControl1.TextBoxElement.MouseDown += TextBoxElement_MouseDown;
private void TextBoxElement_MouseDown(object sender, MouseEventArgs e)
{
var clickedElement = radTextBoxControl1.ElementTree.GetElementAtPoint(e.Location) as ITextBlock;
if (clickedElement != null)
{
}
}
No success either: The GetElementAtPoint always returns the TextBoxElement, which is not wrong, but I want a children of it, a TextBlock.
So I need help on how to catch a click on a TextBlock,... than finally I can color my Block on user click (with setting textblock.ForeColor = Red f.e.).
Finally, what I'am missing also is Selecting a TextBlock. The Select Functions of TextBoxControl are all character based.
But has the TextBlock information about it's own position in the whole Text ? Is this the Offset/Length Property ? Documentation don't gives me any clue, if this is something measured in pixel, number of characters, or whatever.
So how do I something like textBoxControl1.Select(textblock) ?
Hi!
I need help to use our custom DropDownPopupForm (custom means that we have items in the list and after the DropDownListElement we have one RadButtonElement) for auto completion feature too.
Our custom DropDownList works as expected, when I click on the downward arrow then it shows our customized DropDownPopupForm, but when I start typing into the DropDownList then suggestions are not formatted the same way as in the previous scenario (they are not formatted at all).
I found that the AutoCompleteSuggestHelper class has the following line:
"internal bool isSuggestMode = false;//indicates this as Suggest DropDownList e.g. this is a second drop down"
So if I try to use our custom DropDownListElement, then I can not set this field from outside the package.
Thank you,
Sandor