Questions on UI for WinForms Forum

1 answer

102 views

Issue with group by feature after updating controls

I recently upgraded the telerik controls from 2011.2.11.831 to 2015.1.331.20 and I am having an issue with the group by feature of the radgridview. Is this a known issue, and if is then is there a way to fix this?

grid1.png: The screen is stretched, the vertical scroll bar is clearly visible on the right.

grid2.png: As I reduce the width of the screen, the vertical scrollbar comes in with it as expected.

grid3.png: At this point the horizontal scroll bar is visible but the vertical one is not. This is with the horizontal scrollbar all the way to the right. Some content is also cut off.

grid4.png: This is how it looks before the telerik controls were updated to 2015.1.331.20.

GridView

answered on 19 Jan 2016

3 answers

408 views

Changing cell type?

I'm sure this question has been asked a 1000 times, but this will make 1001. I have a RadGridView and for the purposes of this discussion let make it a single column grid. I set the columntype to GridViewCommandColumn. Let's pretend I have 5 rows of data. On even numbered rows I DON'T want a button or any other editor/control. I just want a readonly bit of text to show (or no text at all for that matter). Basically, I want to change the even numbered rows/cells to a different cell type. In this case I want a readonly textbox or something similar. More generically, I want to know how to change individual cells at both design and runtime. Is this doable? If so, I could sure use some guidance.

Thanks ... Ed

GridView

answered on 19 Jan 2016

1 answer

801 views

RadDropDownList - Filtering or Enabling/Disabling Items at runtime

I have a Windows application written in VB.Net. It has a RadDropDownList control that has Items added to it at Design time.

I would like to Filter the items in the RadDropDownList control or disable/enable some items in the RadDropDownList control depending on the data in the other controls on the WinForm.

I have tried looking at the documentation but it is not clear on how to filter the RadDropDownList or find some items to be enabled or disabled in the RadDropDownList when the control has items added at design time not at runtime.

I am using version 2015.3.1104.40 of the RadDropDownList.

Please help. Thanks!

DropDownList

answered on 18 Jan 2016

2 answers

385 views

richTextEditorRibbonBar Hide Group

I need to hide the "Editing & Proofing" and "Styles" group, achieved hide tab.

Sorry for my bad English

RichTextEditor

answered on 18 Jan 2016

1 answer

1.1K+ views

Filling GridView with Multiple Threads

I'm going to fill my RadGridView by using multiple threads. My code is as follows but is not working. How can I do this?

BackgroundWorker[] workers = new BackgroundWorker[2];

private void frmTest_Load(object sender, EventArgs e)

{

for (int col = 0; col < 300; col++)

grid.Columns.Add("Col " + col.ToString());

for (int r = 0; r < 2; r++)

{

workers[r] = new BackgroundWorker();

workers[r].DoWork += new DoWorkEventHandler(Worker_DoWork);

workers[r].RunWorkerCompleted += new RunWorkerCompletedEventHandler(Worker_RunWorkerCompleted);

workers[r].RunWorkerAsync(grid.MasterView);

}

void Worker_DoWork(object sender, DoWorkEventArgs e)

{

var rnd = new Random();

var info = (GridViewInfo)e.Argument;

var row = new GridViewDataRowInfo(info);

int i = 0;

foreach (GridViewCellInfo cell in row.Cells)

{

cell.Value = i++;

cell.Style.NumberOfColors = 1;

cell.Style.BackColor = Color.FromArgb(rnd.Next(0, 255), rnd.Next(0, 255), rnd.Next(0, 255));

cell.Style.CustomizeFill = true;

}

e.Result = row;

}

void Worker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)

{

grid.Rows.Add((GridViewDataRowInfo)e.Result);

}

GridView

answered on 18 Jan 2016

3 answers

171 views

Replicate SelectedIndices for ListView

I am attempting to move multiple selected items between Telerik ListView controls. If I was doing this with a Winforms Listbox, it would look like this:

private void button1_Click(object sender, EventArgs e)

{

for(int x = listBox1.SelectedIndices.Count - 1; x>= 0; x--)

{

int idx = listBox1.SelectedIndices[x];

listBox2.Items.Add(listBox1.Items[idx]);

listBox1.Items.RemoveAt(idx);

}

However, SelectedIndices does not seem to be available. I've tried to use SelectedItems, but my attempts either yield exceptions (because the index was changed at the first delete) or incorrectly listed items in the target list (again because of previous item removals). How does one do this with two Telerik ListView controls? Thanks.

ListView

answered on 18 Jan 2016

10 answers

648 views

Mouse Right Click

Is it possible to select an item in a ListView using the mouse right button?

Thanks,

Javier Gonzalez de Aragon

ListView

answered on 18 Jan 2016

1 answer

201 views

Set current cell after ResetBindings

I want to set the current cell after performing a ResetBindings to allow seemless keyboard entry. In my example code below I would like to be able to edit the Name column after tabbing out of the Age column. The row appears highlighted but I must navigate to a different row before I can continue editing

public class MyData : IComparable

{

public int Age { get; set; }

public string Name { get; set; }

public MyData ()

{

}

public MyData (string name, int age)

{

Name = name;

Age = age;

}

public int CompareTo (object obj)

{

var other = obj as MyData;

if (other == null)

return 0;

if (this.Age > other.Age)

return 1;

if (this.Age < other.Age)

return -1;

return 0;

}

private List<MyData> m_dataSource;

private BindingSource myDataBindingSource = new BindingSource();

public Form1()

{

InitializeComponent();

this.radGridView1.MasterTemplate.DataSource = myDataBindingSource;

m_dataSource = PopulateData ();

this.myDataBindingSource.DataSource = m_dataSource;

radGridView1.CellEndEdit += radGridView1_CellEndEdit;

}

void radGridView1_CellEndEdit(object sender, Telerik.WinControls.UI.GridViewCellEventArgs e)

{

var data = this.radGridView1.CurrentRow.DataBoundItem as MyData;

m_dataSource.Sort();

myDataBindingSource.ResetBindings(false);

if (data != null)

{

foreach (var row in this.radGridView1.Rows)

{

if (row.DataBoundItem == data)

{

row.IsCurrent = true;

}

else

{

row.IsCurrent = false;

}

private List<MyData> PopulateData ()

{

List<MyData> dataList = new List<MyData> ();

dataList.Add (new MyData ("A", 1));

dataList.Add (new MyData ("B", 7));

dataList.Add (new MyData ("C", 3));

dataList.Add (new MyData ("D", 5));

dataList.Add (new MyData ("E", 15));

return dataList;

}

GridView

answered on 18 Jan 2016

3 answers

94 views

Save Colors in Layout

I save RadGridView layout in SQL using the following code:

string name = Microsoft.VisualBasic.Interaction.InputBox("Please insert the layout name:", " ");

using (MemoryStream ms = new MemoryStream())

{

var lay = new Rahat.Layout();

lay.User_Id = 123;

lay.Title = name;

#region lay.Layout

grid.SaveLayout(ms);

var sw = new StreamWriter(ms);

sw.Flush();

ms.Position = 0;

var sr = new StreamReader(ms);

var myStr = sr.ReadToEnd();

lay.Layout = myStr;

#endregion

_dbRahat.Layouts.InsertOnSubmit(lay);

_dbRahat.SubmitChanges();

}

and load the layout using the following code:

var lay = _dbRahat.Layouts.First(l => l.Id.ToString() == cmbPreset.SelectedValue.ToString());

byte[] byteArray = Encoding.UTF8.GetBytes(lay.Layout);

var stream = new MemoryStream(byteArray);

grid.LoadLayout(stream);

FillGrid();

The problem is that the grid colors (header cell colors, data cell colors) are not saved and loaded with SaveLayout() and LoadLayout() methods. How can I solve this problem?

Thank you

GridView

answered on 18 Jan 2016

5 answers

391 views

TargetInvocationException

I am currently running Telerik WinControls 2009 Q2, I have a ribbon on an MDI form inheriting from the ShapeForm form class.

I would click run, it comes up without a hitch, sometimes it will be fine, most times however if I move the mouse, hover over a button, do nothing, it will throw a TargetInvocationException. This exception is pasted below. This application worked flawlessly till I added the RibbonControl to update the GUI.

Any suggestions on fixing this issue would be greatly appreciated. I am at a loss as to what might be going on but the common denominator seems to be the ribbon The inner exception is a null reference exception in Telerik.WinControls but I am at a loss what this might be.

Exception:

System.Reflection.TargetInvocationException was unhandled

Message="Exception has been thrown by the target of an invocation."

Source="mscorlib"

StackTrace:

at System.RuntimeMethodHandle._InvokeMethodFast(Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

at System.RuntimeMethodHandle.InvokeMethodFast(Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeTypeHandle typeOwner)

at System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks)

at System.Delegate.DynamicInvokeImpl(Object[] args)

at System.Windows.Forms.Control.InvokeMarshaledCallbackDo(ThreadMethodEntry tme)

at System.Windows.Forms.Control.InvokeMarshaledCallbackHelper(Object obj)

at System.Threading.ExecutionContext.runTryCode(Object userData)

at System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode code, CleanupCode backoutCode, Object userData)

at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)

at System.Windows.Forms.Control.InvokeMarshaledCallback(ThreadMethodEntry tme)

at System.Windows.Forms.Control.InvokeMarshaledCallbacks()

at System.Windows.Forms.Control.WndProc(Message& m)

at System.Windows.Forms.ScrollableControl.WndProc(Message& m)

at Telerik.WinControls.RadControl.WndProc(Message& m)

at Telerik.WinControls.UI.RadRibbonBar.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(ApplicationContext context)

at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()

at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()

at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)

at SoftwareConfigurator.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81

InnerException: System.NullReferenceException

Message="Object reference not set to an instance of an object."

Source="Telerik.WinControls"

StackTrace:

at Telerik.WinControls.Layouts.ContextLayoutManager.LayoutQueue.GetTopMost()

at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayout()

at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayoutCallback(ILayoutManager manager)

InnerException:

RibbonBar

answered on 15 Jan 2016