Questions on UI for WinForms Forum

4 answers

565 views

RadarChart - Setting line thickness and color

Hi again,

I have successfully implemented a radar area line chart as per attached image. I have the following questions:

(a) How I can programmatically change the thickness of the displayed line?

(b) How I can change the colour of each category line depending on the value, e.g. value =100 will be red, value =10 will be blue and so on.

Regards,

George

ChartView

answered on 06 Jun 2014

1 answer

152 views

Multiselect node in RadGanttViewElement

Hello admin,

Could you show me how to multi-select nodes in RadGanttViewElement?

Thanks

GanttView

answered on 06 Jun 2014

5 answers

236 views

RichTextBox

Hi there,

I'm trying the RichTextBox and something doesn't seem right. In the properties window if I add a value for the Text property and run the app it doesn't show.
Same if I dynamically add a RichTextBox at runtime and try and apply a value to the text property... nothing shows up.

Questions:
1. Why doesn't the text property work?
2. Does winforms come with the equivalent of Asp.net for Ajax RadEditor and is RichTextBox it?

Regards,
Jacques

RichTextBox (obsolete as of Q3 2014 SP1)

answered on 06 Jun 2014

3 answers

296 views

Issues with DefaultValuesNeeded event

On adding new row in RadGridView, I am assigning DefaultValues in DefaultValuesNeeded event. When I start typing in the new row, the default values appear but the moment I hit enter on the row ( so that it is added to the current grid ) , all the default values just disappear.
I have created columns dynamically.

Please tell me what is the issue or am I missing anything ?

Below is my code.

grid code:

private void BindGrid()

{

this.ExportSettingGridView.AllowAddNewRow = false;

this.ExportSettingGridView.AutoGenerateColumns = false;

this.ExportSettingGridView.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;

this.ExportSettingGridView.ShowGroupPanel = false;

this.ExportSettingGridView.MasterTemplate.EnableGrouping = false;

this.ExportSettingGridView.EnableHotTracking = true;

//Settings Name column

GridViewTextBoxColumn nameCol = new GridViewTextBoxColumn();

nameCol.FieldName = "Name";

nameCol.Name = "Name";

nameCol.HeaderText = "Export Setting";

this.ExportSettingGridView.Columns.Add(nameCol);

//Settings Na Option Combo Box

GridViewComboBoxColumn naDataOptionCol = new GridViewComboBoxColumn();

naDataOptionCol.FieldName = "NaData.NaDataOption";

naDataOptionCol.Name = "NaData.NaDataOption";

naDataOptionCol.HeaderText = "NA Data Option";

naDataOptionCol.DataSource = Enum.GetValues(typeof(NADataOption));

naDataOptionCol.DataType = typeof(NADataOption);

naDataOptionCol.DataSourceNullValue = NADataOption.BLANKROW;

this.ExportSettingGridView.Columns.Add(naDataOptionCol);

//Setting NA Option Custom Text field Columns

GridViewTextBoxColumn naDataOptionCustomCol = new GridViewTextBoxColumn();

naDataOptionCustomCol.FieldName = "NaData.Custom";

naDataOptionCustomCol.Name = "NaData.Custom";

naDataOptionCustomCol.HeaderText = "NA Data Option Custom";

this.ExportSettingGridView.Columns.Add(naDataOptionCustomCol);

//Setting IncludePartialLastPeriod

GridViewComboBoxColumn includePartialLastPeriodCol = new GridViewComboBoxColumn();

includePartialLastPeriodCol.FieldName = "IncludePartialLastPeriod";

includePartialLastPeriodCol.HeaderText = "Include Partial Last Period";

includePartialLastPeriodCol.Name = "IncludePartialLastPeriod";

includePartialLastPeriodCol.DataSource = new String[] { "True", "False" };

includePartialLastPeriodCol.DataType = typeof(bool);

this.ExportSettingGridView.Columns.Add(includePartialLastPeriodCol);

//Setting Sorting Column

GridViewComboBoxColumn sortingCol = new GridViewComboBoxColumn();

sortingCol.FieldName = "Sorting";

sortingCol.HeaderText = "Sorting";

sortingCol.Name = "Sorting";

sortingCol.DataSource = new String[] { "ASC", "DESC" };

this.ExportSettingGridView.Columns.Add(sortingCol);

//Setting Data Load Position

GridViewComboBoxColumn dataPostionOptionsCol = new GridViewComboBoxColumn();

dataPostionOptionsCol.FieldName = "DataLoadPosition.CursorLocation";

dataPostionOptionsCol.Name = "DataLoadPosition.CursorLocation";

dataPostionOptionsCol.HeaderText = "Cursor Location";

dataPostionOptionsCol.DataSource = new String[] { "True", "False" };

dataPostionOptionsCol.DataType = typeof(bool);

dataPostionOptionsCol.DropDownStyle = Telerik.WinControls.RadDropDownStyle.DropDownList;

this.ExportSettingGridView.Columns.Add(dataPostionOptionsCol);

//Setting Data Load Cell location

GridViewTextBoxColumn cellCol = new GridViewTextBoxColumn();

cellCol.FieldName = "DataLoadPosition.Cell";

cellCol.Name = "DataLoadPosition.Cell";

cellCol.HeaderText = "Cell Location";

this.ExportSettingGridView.Columns.Add(cellCol);

this.ExportSettingGridView.BestFitColumns();

}

          private void newButton_Click(object sender, EventArgs e)

          {

            this.ExportSettingGridView.AllowAddNewRow = !this.ExportSettingGridView.AllowAddNewRow;

          } 



        private void ExportSettingGridView_DefaultValuesNeeded(object sender, GridViewRowEventArgs e)

        {

            if (e.Row != null && e.Row is GridViewNewRowInfo)

            {

                e.Row.Cells["NaData.NaDataOption"].Value = currentProfile.NaData.NaDataOption;

                e.Row.Cells["NaData.Custom"].Value = currentProfile.NaData.Custom;

                e.Row.Cells["DataLoadPosition.CursorLocation"].Value = currentProfile.DataLoadPosition.CursorLocation;

                e.Row.Cells["DataLoadPosition.Cell"].Value = currentProfile.DataLoadPosition.Cell;

            }

        }

GridView

answered on 06 Jun 2014

3 answers

423 views

[Solved] How to maintain multilevel hierarchy in GridView

hello everyone..
am using telerik radGridView for windows forms. I need to have atleast of 3 levels of hierarchy in my grid. And, it is essential for me to follow "Load-on-Demand" method to bind the inner grids.
Currently am doing this:

private void Form2_Load(object sender, EventArgs e)
{
this.radGridView1.MasterTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;

//First Child Template Begins

GridViewTemplate firstLevelTemplate = new GridViewTemplate();
firstLevelTemplate.Columns.Add("Name", "Name", "Name");
firstLevelTemplate.Columns.Add("Owner", "Owner", "Owner");
firstLevelTemplate.Columns.Add("Parent", "Parent", "Parent");

//First Child Template Ends

this.radGridView1.Templates.Add(firstLevelTemplate);
this.radGridView1.Templates[0].HierarchyDataProvider = new GridViewEventDataProvider(firstLevelTemplate);
this.radGridView1.RowSourceNeeded += new GridViewRowSourceNeededEventHandler(radGridView1_RowSourceNeeded);
}

void radGridView1_RowSourceNeeded(object sender, GridViewRowSourceNeededEventArgs e)
{
string serverInstance = e.ParentRow.Cells[0].Value.ToString();
ServerConnection conn = new ServerConnection();
conn.ServerInstance = serverInstance;
Server srv = new Server(conn);

DatabaseCollection DBs = srv.Databases;
foreach (Database db in DBs)
{
GridViewRowInfo row = e.Template.Rows.NewRow();
row.Cells[0].Value = db.Name;
row.Cells[1].Value = db.Owner;
row.Cells[2].Value = db.Parent.Name;

e.SourceCollection.Add(row);
}

}

It beautifully adds the two levels! I want a third level now. How to do that?? I tried adding GridViewTemplate to e.Template.Templates, but no luck..please help me..

GridView

answered on 06 Jun 2014

2 answers

491 views

[Solved] drag and drop a text on on a Richtextbox

Hi there,

I'm new to telerik controls, I want to drag and drop at text on the richtexbox. Can someone help me?

thinks.

RichTextBox (obsolete as of Q3 2014 SP1)

answered on 06 Jun 2014

1 answer

855 views

Filter throws error Object reference not set to an instance of an object.

Hi All ,
I am getting the error "Object reference not set to an instance of an object." when trying to filter on gridview.
my functional requirement is to referesh grid data on every 5 seconds. I get this error when i keep open filter popup above 5 seconds and trying to filter the data. However its working if i try to filter within 5 seconds.

Please help to suggest .

The followings are the stacktrace details for your reference:

System.NullReferenceException was unhandled
Message="Object reference not set to an instance of an object."
Source="Telerik.WinControls.GridView"
StackTrace:
       at Telerik.WinControls.UI.GridHeaderCellElement.filterPopup_FilterConfirmed(Object sender, EventArgs e)
       at Telerik.WinControls.UI.BaseFilterPopup.OnFilterConfirmed()
       at Telerik.WinControls.UI.RadListFilterPopup.OnButtonOkClick(EventArgs e)
       at Telerik.WinControls.RadItem.OnClick(EventArgs e)
       at Telerik.WinControls.UI.RadButtonItem.OnClick(EventArgs e)
       at Telerik.WinControls.UI.RadButtonElement.OnClick(EventArgs e)
       at Telerik.WinControls.RadItem.DoClick(EventArgs e)
       at Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)
       at Telerik.WinControls.ComponentInputBehavior.OnMouseUp(MouseEventArgs e)
       at Telerik.WinControls.RadControl.OnMouseUp(MouseEventArgs e)
       at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
       at System.Windows.Forms.Control.WndProc(Message& m)
       at Telerik.WinControls.RadControl.WndProc(Message& m)
       at Telerik.WinControls.UI.RadPopupControlBase.WndProc(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 Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
       at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
       at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
       at WindowsApplication2.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
       at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
InnerException:

GridView

answered on 05 Jun 2014

1 answer

128 views

GridView Filter and Expanded Hierarchy

I have a GridView with a second-level hierarchy. I apply a filter to the BindingSource based on the node selected on a TreeView, for example: GridViewBindingSource.Filter = "Department = '" & e.Node.Text & "'". However, if any row is expanded (i.e. showing the second-level hierarchy information) it closes when the BindingSource is filtered. I would like to have any row that is open to remain open. Is there a way to do this?

GridView

answered on 05 Jun 2014

1 answer

1.1K+ views

[Solved] Hover Color

Hi Telerik
is there a Property to change hover color for buttons (radButton , ToggleButton) in UI Element Editor
without using Visual Studio Builder

if not how to change hover color in Visual Studio Builder in single button without changing all

thank you

Buttons, RadioButton, CheckBox, etc

answered on 05 Jun 2014

1 answer

123 views

Prevent Color Names in XAML

Hi,

I am exporting the XAML RadDocument from the RichTextBox to use for my own Gdi+ rendering. To do this I need the text color as (A)RGB values, but especially when I am pasting webcontent into the RichTextBox I sometimes get color names (such as "red", "lime" and so on) as text color. Is there any way to make sure colors in the XAML are always ARGB values without having to convert them myself?

Thanks a lot for your help.

Regards
Jan

RichTextBox (obsolete as of Q3 2014 SP1)

answered on 05 Jun 2014