Questions on UI for WinForms Forum

4 answers

203 views

[Solved] Problem in GridView (Group/Merge Rows)- Help

Hi all,
I have problem with Grid View. I want to group/merge 2 rows or more than two.

Example:

Profile	Test	Sample	Prepared Sample	Container
Blood Group	Blood Group		Serum	Plain Tube
Blood Group	Rh Type
CBCESR	Hb
	RBC
	PCV
	MCV
	MCH
	MCHC

How to make it ? Please help me.

Thanks & Regards.

GridView

answered on 17 Apr 2009

1 answer

126 views

NullReferenceException after upgrade to 2009Q1

Hi

After upgrading my project to 2009Q1, my winform with RadGridView cannot be loaded. The exception is

System.NullReferenceException was unhandled
Message="Object reference not set to an instance of an object."
Source="Telerik.WinControls.GridView"
StackTrace:
       at Telerik.WinControls.UI.GridDataCellElement.MeasureOverride(SizeF availableSize)
       at Telerik.WinControls.UI.GridHeaderCellElement.MeasureOverride(SizeF availableSize)
       at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)
       at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
       at Telerik.WinControls.RadElement.MeasureOverride(SizeF availableSize)
       at Telerik.WinControls.UI.LightVisualElement.MeasureOverride(SizeF availableSize)
       at Telerik.WinControls.UI.GridTableHeaderRowElement.MeasureOverride(SizeF availableSize)
       at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)
       at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
       at Telerik.WinControls.RadElement.MeasureOverride(SizeF availableSize)
       at Telerik.WinControls.UI.LightVisualElement.MeasureOverride(SizeF availableSize)
       at Telerik.WinControls.UI.GridTableBodyElement.MeasureOverride(SizeF availableSize)
       at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)
       at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
       at Telerik.WinControls.UI.GridTableElement.MeasureOverride(SizeF availableSize)
       at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)
       at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
       at Telerik.WinControls.RootRadElement.MeasureOverride(SizeF availableSize)
       at Telerik.WinControls.RootRadElement.MeasureCore(SizeF availableSize)
       at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
       at Telerik.WinControls.ComponentLayoutElementTree.GetPreferredSize(Size sizeConstraints)
       at Telerik.WinControls.RadControl.GetPreferredSize(Size proposedSize)
       at System.Windows.Forms.Layout.TableLayout.InflateColumns(ContainerInfo containerInfo, Size proposedConstraints, Boolean measureOnly)
       at System.Windows.Forms.Layout.TableLayout.ApplyStyles(ContainerInfo containerInfo, Size proposedConstraints, Boolean measureOnly)
       at System.Windows.Forms.Layout.TableLayout.LayoutCore(IArrangedElement container, LayoutEventArgs args)
       at System.Windows.Forms.Layout.LayoutEngine.Layout(Object container, LayoutEventArgs layoutEventArgs)
       at System.Windows.Forms.Control.OnLayout(LayoutEventArgs levent)
       at System.Windows.Forms.ScrollableControl.OnLayout(LayoutEventArgs levent)
       at System.Windows.Forms.TableLayoutPanel.OnLayout(LayoutEventArgs levent)
       at System.Windows.Forms.Control.PerformLayout(LayoutEventArgs args)
       at System.Windows.Forms.Control.PerformLayout()
       at PopularIT.MOSES.POS.UI.frmInvList.InitializeComponent() in C:\Projects\MOSES.POS\MOSES.POS\UI\frmInvList.Designer.cs:line 610
       at PopularIT.MOSES.POS.UI.frmInvList..ctor() in C:\Projects\MOSES.POS\MOSES.POS\UI\frmInvList.cs:line 21
       at PopularIT.MOSES.POS.UI.frmMain.btnInvList_Click(Object sender, EventArgs e) in C:\Projects\MOSES.POS\MOSES.POS\UI\frmMain.cs:line 126
       at System.Windows.Forms.Control.OnClick(EventArgs e)
       at System.Windows.Forms.Button.OnClick(EventArgs e)
       at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
       at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at System.Windows.Forms.ButtonBase.WndProc(Message& m)
       at System.Windows.Forms.Button.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(Int32 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 PopularIT.MOSES.POS.Program.Main() in C:\Projects\MOSES.POS\MOSES.POS\Program.cs:line 82
       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
InnerException:

It worked before upgrade. What is wrong?
Edwin

GridView

answered on 17 Apr 2009

1 answer

305 views

[Solved] GridView Performance

Hi,

I've got a gridview with a 3level hierarchy.

When loading the view with :

first level: 300 elements
second level: 10 elements
third level: 5 elements

the load goes fast.

But if I'm trying the following load:

first level: 2100 elements
second level: 10 elements
third level: 5 elements

the load goes slow...

I think I had to wait for 10 - 15 minutes before everything was loaded.

Is this due to bad programming or something else?

my code:

    
            var sortedByLft = from c in network 
        
                              where (c.Rgt - c.Lft) == 1 
        
                              orderby c.Name ascending 
        
                              select c; 
        
            var checkNetwork = new List<Network>(); 
        
            //display the unique items in the gridview 
        
            foreach (var item in sortedByLft) 
        
            {     
        
                Application.DoEvents(); 
        
                //check if item is already added 
        
                var check = checkNetwork.Find(p => p.Adserver_id == item.Adserver_id); 
        
                if (check != null) continue; 
        
                checkNetwork.Add(item); 
        
                Application.DoEvents(); 
        
                rgvAdlPositions.MasterGridViewTemplate.Rows.Add(new object[] { item.Adserver_id, item.Name }); 
        
                var template = rgvAdlPositions.MasterGridViewTemplate.ChildGridViewTemplates[0]; 
        
                foreach(var position in item.Positions) 
        
                { 
        
                    Application.DoEvents(); 
        
                    //get the method as string 
        
                    var method = Enums.GetMethod(position.Method); 
        
                    //add to row 
        
                    template.Rows.Add(new object[] 
        
                                          { 
        
                                              item.Adserver_id, position.PosId, 
        
                                              ownFunctions.ConcatStrings(new List<string> 
        
                                                                                      { 
        
                                                                                          position.Name, 
        
                                                                                          position.Width.ToString(), 
        
                                                                                          "x", 
        
                                                                                          position.Height.ToString() 
        
                                                                                      }), 
        
                                              method 
        
                                          }); 
        
                    var templateAd = template.ChildGridViewTemplates[0]; 
        
                    foreach(var adPos in position.adserverPositions) 
        
                    { 
        
                        //add adserved position to row 
        
                        templateAd.Rows.Add(new object[] { item.Adserver_id, position.PosId, adPos.name }); 
        
                    } 
        
                } 
        
            }

Is it possible that the lines 12 and 28 are the bad ones?
the first one is checking if I have unique elements and the second one is calling a static function to concatenate a list of strings.

Thanks a lot in advanced

GridView

answered on 17 Apr 2009

5 answers

205 views

RadScrollbar in Webbrowser

Hello sir,
In my project i am using a Microsoft Web browser and i want to use RadScrollbar instead of default one. I don't know how to use RadScrollbar instead of default one. Do you have any resource for my reference .

ScrollBar

answered on 17 Apr 2009

2 answers

762 views

How to mask input in a GridView with custom cell formatting

I've got an interesting situation that I'm having a bit of trouble with and I was hoping someone could help me out.

I'm using a GridView to display a Key->Value pair, where the data type can vary between Integers, Strings, Currency, and DateTime.

I am catching the CellFormatting event in GridView and am able to properly draw the controls for each data type without much trouble, but I need a way to stop text from being typed into certain cells...

I know it can be done with a GridViewMaskBoxColumn, but as I've said - I have many different types of data, so that doesn't apply here.

My first intention was to use a RadSpinElement, which seemed to work at first, however when the data changes and it redraws itself, the text/number area of the element moves about 5 pixels to the left and is very annoying. I've tried setting several layout and sizing options for the element, but can't seem to get it to draw correctly..

My second choice was to use a Masked Text Box element, but apparently the Masking feature that I need is in the Control, and not the element, so that won't work either..

Does anyone have any suggestions?

Thanks.

GridView

answered on 17 Apr 2009

2 answers

191 views

RadDropDownButton - Image Issue

Hi there,
I added a RDDB (trial version) to my form with text (allignment: middle centre) and an image (icon, textimagerelation: overlay). All well. But the icon is placed (by default) completely to the left (on the edge) of the buttom. Not nice. So I tweeked it a little (Edit UI Elements). Set the ImagePrimitive location to 20,0. Ah, great, exactly the position of the icon I want on the button! Tthat is, in design view. When I run the form, the icon is back to its old position, at the edge of the button.
How to resolve?

Regards,
Peter.

Buttons, RadioButton, CheckBox, etc

answered on 17 Apr 2009

1 answer

186 views

Backwards compatibility

Hi, I just upgraded my project to the latest 2009 Q1 release of RadControls for WinForms. But I am running into some issues with some of the controls, maybe because it is not backwards compatible. I am not able to find out where the information is to make the current control comply with the latest release, if someone can point me to the right direction that would greatly appreciated.

Thanks in advance.

General Discussions

answered on 17 Apr 2009

1 answer

84 views

Cut and Paste

I would like to cut and paste a chunk from one tab to another. Is this possible.

RibbonBar

answered on 17 Apr 2009

7 answers

425 views

RadMediaPlayer

for WinForms, - does that exist?

Regards, Jill-Connie Lorentsen

General Discussions

answered on 17 Apr 2009

1 answer

174 views

[Solved] Width Issue

I have an application that uses floating dockpanels.

I have noticed that there seems to be a maximum width equal to the screen resolution width even when
I have not set any maximum or minimum values for the size of the dockpanel window.

I assume this is a built in behavior ? I have tested at multiple resolutions and get the same result.
Is there a way to override this behavior ?

Dock

answered on 17 Apr 2009

	var sortedByLft = from c in network
	where (c.Rgt - c.Lft) == 1
	orderby c.Name ascending
	select c;

	var checkNetwork = new List<Network>();
	//display the unique items in the gridview
	foreach (var item in sortedByLft)
	{
	Application.DoEvents();
	//check if item is already added
	var check = checkNetwork.Find(p => p.Adserver_id == item.Adserver_id);
	if (check != null) continue;
	checkNetwork.Add(item);
	Application.DoEvents();

	rgvAdlPositions.MasterGridViewTemplate.Rows.Add(new object[] { item.Adserver_id, item.Name });
	var template = rgvAdlPositions.MasterGridViewTemplate.ChildGridViewTemplates[0];
	foreach(var position in item.Positions)
	{
	Application.DoEvents();
	//get the method as string
	var method = Enums.GetMethod(position.Method);
	//add to row
	template.Rows.Add(new object[]
	{
	item.Adserver_id, position.PosId,
	ownFunctions.ConcatStrings(new List<string>
	{
	position.Name,
	position.Width.ToString(),
	"x",
	position.Height.ToString()
	}),
	method
	});
	var templateAd = template.ChildGridViewTemplates[0];
	foreach(var adPos in position.adserverPositions)
	{
	//add adserved position to row
	templateAd.Rows.Add(new object[] { item.Adserver_id, position.PosId, adPos.name });
	}
	}
	}