Questions on UI for WinForms Forum

1 answer

143 views

Memory leak

I think that there is a samo memory leak in RichTextEditorRibbonBar, so let me show you my very simple scenario:

One empty telerik radform with just one RichTextEditorRibbonBar.

The steps:

1) Show form

2) Close form

3) Show form again

...

The result is new 30-50M in memory on each new form initsialization.

Plese give me some clue to deal with this problem.

Regards,

Simeon

RibbonBar

answered on 07 Jul 2015

4 answers

238 views

GridViewComboBoxColumn Displays Empty Cell For Newly Added Values

I'm a bit new to the RadControls, and C# in general, so bear with me if the trouble I am facing is due to some terribad implementation. Anyway, here is the problem.

I have a single, form that has a number of radGridViews on it. Most of the grids are very simple lists with a schema that consists of not much more than an 'ID'{int} and a 'Name'{string}. I also have one master grid with a number of GridViewComboBoxColums that reference the aforementioned lists. I'm using entity framework models for the datasources, which I assign using the below

VendorManagerEntities context = new VendorManagerEntities();

protected override void OnLoad(EventArgs e)

{

base.OnLoad(e);

contactBindingSource.DataSource = context.Contacts;

statusBindingSource.DataSource = context.Status;

priorityBindingSource.DataSource = context.Priorities;

categoryBindingSource.DataSource = context.Categories;

}

Note: The RadGridViews and GridViewComboBoxColums are sharing the same DataSources, a.k.a. I have a grid for status's and a combo box on another grid that both use the statusBindingSource.

When I start the application it populates the grids, columns, and combo boxes from the database; no problem is had. If I then add a row, new value, to one of the Grids that value will show up in the corresponding combobox, but if I select the new value, which apears correctly in the drop down list, the cell will be blank. The correct value is selected, and it submits correctly to the database/model, but it does not display. I suspect that is has something to do with the DisplayMember, but I'm not sure. If I restart the program, and the form is recreated, the new values that were gotten from the database display correctly. What I would like is for the new values to display in their cells, without having to close and restart the form application.

I warn that most of the grid creation was done with the designer, so I am hesitant to post too much of that generated code, but I'll try and get the important bits in here

private void InitializeComponent()

{

this.radGrid_Contacts = new Telerik.WinControls.UI.RadGridView(); // Contacts is "supergrid" that has a ton of combo boxes

this.contactBindingSource = new System.Windows.Forms.BindingSource(this.components);

((System.ComponentModel.ISupportInitialize)(this.buyerBindingSource)).BeginInit();

this.radGrid_Statuses = new Telerik.WinControls.UI.RadGridView(); // Status is a simple list, every status wants to some day be part of a combobox

this.statusBindingSource = new System.Windows.Forms.BindingSource(this.components);

((System.ComponentModel.ISupportInitialize)(this.statusBindingSource)).BeginInit();

// ...

//

// Contact Rad Grid

//

this.radGrid_Contacts.MasterTemplate.AutoGenerateColumns = false;

this.radGrid_Contacts.MasterTemplate.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill;

gridViewDecimalColumn1.DataType = typeof(int);

gridViewDecimalColumn1.EnableExpressionEditor = false;

gridViewDecimalColumn1.FieldName = "ID";

gridViewDecimalColumn1.HeaderText = "ID";

gridViewDecimalColumn1.IsAutoGenerated = true;

gridViewDecimalColumn1.Name = "ID";

gridViewDecimalColumn1.ReadOnly = true;

gridViewComboBoxColumn4.DataSource = this.statusBindingSource;

gridViewComboBoxColumn4.DataType = typeof(int);

gridViewComboBoxColumn4.DisplayMember = "Name";

gridViewComboBoxColumn4.EnableExpressionEditor = false;

gridViewComboBoxColumn4.FieldName = "Status_ID";

gridViewComboBoxColumn4.HeaderText = "Status";

gridViewComboBoxColumn4.Name = "Status_ID";

gridViewComboBoxColumn4.ValueMember = "ID";

gridViewComboBoxColumn4.Width = 129;

this.radGrid_Contacts.MasterTemplate.Columns.AddRange(new Telerik.WinControls.UI.GridViewDataColumn[] {

gridViewDecimalColumn1,

gridViewComboBoxColumn4,

gridViewCommandColumn1});

this.radGrid_Contacts.MasterTemplate.DataSource = this.contactBindingSource;

this.contactBindingSource.DataSource = typeof(VendorManager.Contact);

//

// radGrid_Statuses

//

gridViewDecimalColumn6.DataType = typeof(int);

gridViewDecimalColumn6.EnableExpressionEditor = false;

gridViewDecimalColumn6.FieldName = "ID";

gridViewDecimalColumn6.HeaderText = "ID";

gridViewDecimalColumn6.IsAutoGenerated = true;

gridViewDecimalColumn6.IsVisible = false;

gridViewDecimalColumn6.Name = "ID";

gridViewDecimalColumn6.Width = 301;

gridViewTextBoxColumn23.EnableExpressionEditor = false;

gridViewTextBoxColumn23.FieldName = "Name";

gridViewTextBoxColumn23.HeaderText = "Status Name";

gridViewTextBoxColumn23.IsAutoGenerated = true;

gridViewTextBoxColumn23.Name = "Name";

gridViewTextBoxColumn23.Width = 909;

gridViewTextBoxColumn24.DataType = typeof(VendorManager.TrackableCollection<VendorManager.Contact>);

gridViewTextBoxColumn24.EnableExpressionEditor = false;

gridViewTextBoxColumn24.FieldName = "Contacts";

gridViewTextBoxColumn24.HeaderText = "Contacts";

gridViewTextBoxColumn24.IsAutoGenerated = true;

gridViewTextBoxColumn24.IsVisible = false;

gridViewTextBoxColumn24.Name = "Contacts";

gridViewTextBoxColumn24.Width = 151;

this.radGrid_Statuses.MasterTemplate.Columns.AddRange(new Telerik.WinControls.UI.GridViewDataColumn[] {

gridViewDecimalColumn6,

gridViewTextBoxColumn23,

gridViewTextBoxColumn24,

gridViewTextBoxColumn25});

this.radGrid_Statuses.MasterTemplate.DataSource = this.statusBindingSource;

this.radGrid_Statuses.Name = "radGrid_Statuses";

}

I hope I explained my problem thorougly, if not please tell me so that I can elaborate on anything important that I missed. Thank you in advance for the help.

-Joel

EDIT: Quite interstingly, if I right click and clear the value on the cell it displays correctly.

GridView

answered on 07 Jul 2015

1 answer

487 views

How do I resize the Image of a RadButton at runtime?

I have a from with a number of RadButton elements each of which contains a square Image.

When the application is maximized I want all of the images to remain square when the elements are resized.

Can I re-adjust the sizes after the RadButton elements are resized?

If not, can I lock the aspect ratio of the Images so that resizing the RadButton elements does not distort them?

Buttons, RadioButton, CheckBox, etc

answered on 07 Jul 2015

1 answer

198 views

RadGridView filter crashes due to multi select and fast clicking

I am having an issue with the filter option crashing with radgridview.

To reproduce, create a radgridview as I describe below.

Run the program

Quickly click around in the cells of the table a few times, making sure to drag your mouse a bit so to select a few rows on some of the clicks.

Then quickly click the filter. (sometimes takes a few tries)

I get the following error

System.NullReferenceException: Object reference not set to an instance of an object.

at Telerik.WinControls.UI.GridRowBehavior.DoMultiFullRowSelect(GridCellElement currentCell, Point currentLocation)
   at Telerik.WinControls.UI.GridRowBehavior.DoMouseSelection(GridCellElement currentCell, Point currentLocation)
   at Telerik.WinControls.UI.GridRowBehavior.ProcessMouseSelection(Point mousePosition, GridCellElement currentCell)
   at Telerik.WinControls.UI.GridRowBehavior.OnMouseMove(MouseEventArgs e)
   at Telerik.WinControls.UI.BaseGridBehavior.OnMouseMove(MouseEventArgs e)
   at Telerik.WinControls.UI.RadGridView.OnMouseMove(MouseEventArgs e)
   at System.Windows.Forms.Control.WmMouseMove(Message& m)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
   at Telerik.WinControls.RadControl.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
   at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
   at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
   at System.Windows.Forms.Application.Run(Form mainForm)
   at BeaconQuerySource.Program.Main(String[] args)

To create the grid do the following.

Make a RadGridView with the following options (not sure if all are important but the filter and multiselect are)

this.gridConnectedSessions.MasterTemplate.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill;

this.gridConnectedSessions.MasterTemplate.EnableAlternatingRowColor = true;
this.gridConnectedSessions.MasterTemplate.EnableFiltering = true;

this.gridConnectedSessions.MasterTemplate.MultiSelect = true;

(leave the rest as the default options)

Add 3 columns to the grid

Add 5 rows of data to the grid (I used the following)

radGridView1.Rows.Add("test1","test1","test1");
radGridView1.Rows.Add("test2", "test2", "test2");
radGridView1.Rows.Add("test3", "test3", "test3");
radGridView1.Rows.Add("test4", "test4", "test4");
radGridView1.Rows.Add("test5", "test5", "test5");

Any help would be appreciated, thank you.

GridView

answered on 06 Jul 2015

11 answers

865 views

Memory problem after disposing all telerik controls

Hello

I'm actually meeting a problem with Telerik control disposing, using the Q3 2010.3.10.1109.

I joined a screenshot showing an Ant Profiler Analysis, after we disposed manually all our Telerik Controls.

Actually, some RadPropertyValues and others things are not disposed.
Maybe We are doing something wrong while disposing.

Can you pelase tell is where these RadPropertyValues are coming from, and if it's possible to dispose it as all others telerik resources on the screenshot?

For your information, we added dispose() methods for each telerik controls.

Thanks for your lights

General Discussions

answered on 06 Jul 2015

1 answer

174 views

transparent on DockTabStrip

how can i get transparent color on dockstrip? i change back color on RadPageViewContentAreaElement to transparent and switch gradient style to solid but nothing happen.

Dock

answered on 03 Jul 2015

1 answer

847 views

RadGridView scroll position reset after Rebind() for WinForms

This is a question specifically for WinForms but the question is the same as below:

http://www.telerik.com/forums/radgridview-scroll-position-reset-after-rebind

Basically, what object and parameters do I have to access within the RadGridView to get my scroll position, so that I can reset it to that position after a rebind.

GridView

answered on 02 Jul 2015

3 answers

131 views

RichTextEditor Ribbon translation behavior

Hello Telerik,

I tried to translate the control into german.

How can I prevent the behavior, which is shown in the picture. (Wordwrap and cut off).

Greetings

PS: Yes, we used also font scaling.

RichTextEditor

answered on 02 Jul 2015

1 answer

207 views

Setting tooltip delay for an appointment

Hi,

In my code I'm adding appointments to a radScheduler like this:

Dim app As New Appointment

app = New Appointment(Convert.ToDateTime(dr("StartTime")), Convert.ToDateTime(dr("EndTime")))

app.ToolTipText = "Some text"

How can I set a delay time for the tooltip, i.e. how long the tooltip text is displayed?

Regards,

Pirjo

Scheduler and Reminder

answered on 02 Jul 2015

9 answers

432 views

ToolTabStrip and redock

How do I prevent a ToolTabStrip from being disposed when it has no child panels? I'd like to allow users to redock child panels into a ToolTabStrip even if there are no child panels left.

At the moment I am getting an error "Changing children collection of an already disposed element" when the redocking is attempted.

Thanks,

-Lou

Dock

answered on 01 Jul 2015