Questions on UI for WinForms Forum

1 answer

543 views

Value cannot be null. Parameter name: value

Hi Team,

I'm facing this error "Value cannot be null. Parameter name: value" when i import the "docx" to richtextbox. I refer this Link for sample code. I can read below code for some file but some are not.

Here is sample Code

private void button1_Click(object sender, EventArgs e)

{

RadDocument document = new RadDocument();

IDocumentFormatProvider provider = new DocxFormatProvider();

OpenFileDialog openDialog = new OpenFileDialog();

openDialog.Filter = "Documents|*.docx";

openDialog.Multiselect = false;

DialogResult dialogResult = openDialog.ShowDialog();

if (dialogResult == System.Windows.Forms.DialogResult.OK)

{

using (Stream stream = openDialog.OpenFile())

{

document = provider.Import(stream);

radRichTextBox1.Document = document;

}

I do not know this is the file issue or not. I'm using V2011.3.11.1219 WinForms. I attached the file that can not read from code. You need to change the extension to docx.

Regards,

RichTextEditor

answered on 13 Jan 2017

1 answer

206 views

Screen Position of a cell

Hi Telerik,

In RadGridView, it was possible to use

cell.PointToScreen(cell.BoundingRectangle.Location)

to obtain the current screen position of a cell. What is the equivalent approach in RadVirtualGrid to obtain a cell's top/left from screen's point of view ?

Thank you,

Saj.

VirtualGrid

answered on 13 Jan 2017

6 answers

2.1K+ views

RadButton and Tooltips

Greetings Telerik,

I just tried to add a tooltip-text to a RadButton (image only), but i don't see any property for this. I assumed there's this possibility since there is a property named "ShowItemToolTips" (which is set to yes).

Is this a bug or doesn't it exist?

Many thanks,
Daniel

Buttons, RadioButton, CheckBox, etc

answered on 13 Jan 2017

3 answers

259 views

gridview group by column

Hi. First, thank you beforehand. I have a problem and I do not know how to do it. I have a gridview in which, through a query, I get results in a column of player names, and another column of teams. Each player can belong to a team, but there may be players who do not belong to any team. In my interface I have a button, which when I press it, should show me in my gridview a grouping in the first column of the players belonging to the same team. And those who do not have a team, do not group them into any group, that is, I put them for example down groups of teams formed by players.
Could you tell me how to do this ???

Example:
Name Team

J1 TeamA
J2 TeamB
J3 TeamC
J4 TeamA
J5 TeamB
J6
J7
J8 TeamC

Result in my GridView: Push Button

Name Team
+TeamA
J1 TeamA
J4 TeamA
+ TeamB
J2 TeamB
J5 TeamB
+ TeamC
J3 TeamC
J8 TeamC
J6
J7

GridView

answered on 12 Jan 2017

2 answers

315 views

Cell borders disappear for GridViewCommandColumn

Hi,

I have a GridViewCommandColumn with buttons that are not always visible (using e.CellElement.Visibility = ElementVisibility.Hidden). When they are not visible the border lines around the cell disappear (see image 1).

I tried to fix this using EnableCustomDrawing=True and subscribing to the CellPaint event and draw the border manually, but this does not seem to work. In fact the CellPaint event seem to happen BEFORE the buttons is drawn. I came to this conclusion by drawing a black border around all cells, and got the result in image 2.

How can I fix this missing border problem?

/Per

GridView

answered on 11 Jan 2017

7 answers

328 views

Make Controls render correctly on DPI aware applications

With High DPI displays increasingly appearing in corporate environments, it would be nice if the Telerik Controls would render correctly in DPI aware applications.

Controls that are direct replacements for WinForms Standard controls such as Textbox, Tree, Checkbox, Label etc. should in their default configuration render identically to the Microsoft .net standard controls in .Net 4.6.1.

Controls that draw content such as ReportViewer, ChartView, Print Preview etc. should behave as expected. That is, by default, their content should render consistently relative to the size of the control in the same way regardless of the DPI settings.

Graphical elements in the controls should scale according to the control and provide different resolution graphics to support at least the standard settings of Windows 10 (125,150,175,200%).

Regards

Erwin

New Product Suggestions

answered on 11 Jan 2017

4 answers

376 views

Scheduler ExamplesForm

I am trying to use the scheduler examples using Telerik UI for Winforms Q1 2014 but getting errors. Where do I get the ExamplesForm and Telerik.Example .dlls?

Imports Telerik.QuickStart.WinControls
Imports Telerik.WinControls.UI
Imports Telerik.Examples.WinControls.DataSources
Imports Telerik.Examples.WinControls.DataSources.SchedulerDataSetTableAdapters
Imports Telerik.WinControls.Enumerations
Imports Telerik.WinControls.UI.Scheduler.Dialogs
Imports System.Data.OleDb

Namespace Telerik.Examples.WinControls.Scheduler.DataBinding
Partial Public Class Form1
Inherits ExamplesForm
Private appointments As List(Of MyAppointment) = Nothing
Private resources As List(Of MyResource) = Nothing
Private schedulerDataSet As SchedulerDataSet = Nothing

Scheduler and Reminder

answered on 10 Jan 2017

1 answer

477 views

RadGridView with Row Details

In the "Demo Application - UI for WinForms Q1 2016 SP1" there is an example of the RadGridView with Row Details.
I'm trying to reproduce this in the OpenEdge programming platform (so need to to make some minor changes) but I don't get it to work!
The latest problem is that it looks like 'DetailsColumn' is not a valid property of the RadGridView (or there is an error in the docs).

The adjusted code is:
method private void RadGridViewDetails_Load( input sender as System.Object, input e as System.EventArgs ):
            // TODO: This line of code loads data into the 'nwindDataSet.Employees' table. You can move, or remove it, as needed.
/*            this.employeesTableAdapter.Fill(this.northwindDataSet.Employees); */

            this-object:radGridView1:ReadOnly = true.
            this-object:radGridView1:AllowColumnReorder = false.
            this-object:radGridView1:AllowColumnResize = false.
            this-object:radGridView1:AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode:Fill.
            this-object:radGridView1:AutoExpandGroups = true.
            this-object:radGridView1:TableElement:RowHeight = 40.

            this-object:radGridView1:GroupDescriptors:Add(new Telerik.WinControls.UI.GridGroupByExpression("City GroupBy City")).
            /* this-object:radGridView1:Groups[1][0]:IsCurrent = true. */

            this-object:radGridView1:Columns["Photo"]:VisibleInColumnChooser = false.
            this-object:radGridView1:Columns["Photo"]:IsVisible = false.
            this-object:radGridView1:Columns["Notes"]:WrapText = true.
            this-object:radGridView1:Columns["LastName"]:SortOrder = Telerik.WinControls.UI.RadSortOrder:Descending.

            this-object:radGridView1:DetailsColumn = this-object:radGridView1:Columns["Notes"].
       return.

   end method.

The error I get is: Could not locate element 'DetailsColumn' in class Telerik.WinControls.UI.RadGridView
I'm I doeing something wrong here??

Also you notice that I commented this-object:radGridView1:Groups[1][0]:IsCurrent = true.
That's because this is not allowed in OpenEdge? What does this statement mean? Maybe I can transform that so it is allowed in OpenEdge.

What is not clear to me in the example is what code is responsible for adding that DetailsRow?
So what property creates that (default hidden) row that is displayed when I click on a row in the RadGridView

Thanks
Didier

GridView

answered on 10 Jan 2017

1 answer

187 views

Force connection to Left connector

Just researching this component to see if it can do what I want.

I have slightly modified the 'First look' example to see if I can modify it to suit.

From reading the documentation, I should be able to force the connector to attach to a shape on one side , but I cannot get it to work.

As a simple test I tried to add a connection between a member to a Node

Private Sub PopulateWithData()

Dim dataXml As XElement = XElement.Load("Organization.xml")

For Each element As XElement In dataXml.Elements("Node")

Dim node As OrgContainerShape = Me.CreateNode(element, Nothing)

node.BaseColor = Me.groupColor(0)

Me.RadDiagram1.AddShape(node)

currentLayoutSettings.Roots.Add(node)

Me.GetSubNodes(element, node, 2)

Next

'------- Add a new connection as a test -------------------------------

Dim connection As New RadDiagramConnection()

connection.ConnectionType = Telerik.Windows.Diagrams.Core.ConnectionType.Polyline

Dim parentNode = Me.RadDiagram1.Shapes(0)

Dim destNode = Me.RadDiagram1.Shapes(7)

connection.Source = parentNode

connection.Target = destNode

connection.SourceConnectorPosition = "Left"

connection.TargetConnectorPosition = "Auto"

Me.RadDiagram1.AddConnection(connection)

End Sub

But it always connects to the bottom of the shape.

What am I doing wrong? ( I have checked and the shape does have a Left connector)

Many thanks

Rob

Diagram, DiagramRibbonBar, DiagramToolBox

answered on 10 Jan 2017

2 answers

293 views

Why RadDropdownlist for Winform changes the TextAlignment to center automatically?

Hello everyone,

I tried to use the RadDropdownlist in my our project based on Winform, but when i changed the SelectedIndex there is an issue happened, it changed the TextAlignment to center automatically?

Although i tried many solutions to fix it but i cannot, so please help me to solve this issue :(

Bellow are my code, it happened on two bold lines.

var ddl = control as RadDropDownList;

if (ddl != null)

{

if (!string.IsNullOrWhiteSpace(value))

{

var selectedItem = ddl.Items.FirstOrDefault(x => x.Value != null && x.Value.ToString() == value);

if (selectedItem != null)

{

ddl.SelectedItem = selectedItem;

}