Questions on UI for WinForms Forum

5 answers

1.7K+ views

[Solved] Style for Disabled Button with Image

The default style does not gray out the image on a button that is disabled.

But there are other themes that do gray out the image (such as Desert, Breeze).

I'm making a copy of the default style and making small adjustments. How can I make my custom theme use a gray image for a button that is disabled?

Themes and Visual Style Builder

answered on 29 Feb 2012

3 answers

138 views

[Solved] Update From a GridViewDetailElement

Hello,
I was hoping to have the ability to Update my RadGrid from a GidViewDetailElement that was implemented as a User Control. When a user clicks on a row in the RadGrid, a separate UserControl is displayed to show the Details of that Row. I want to have the ability for the User to change a value in one of the fields shown in the Details vVew which will ujpdate the row in the base RadGrid. The code was implemented just like your example of "Custom Views" only that i wrapped the Details view as a User Control in a RadHostItem. I'm able to view the data just fine in the User Control, its just not apparent to me how to now pass updates from this UserControl now back to my RadGrid with this GridViewDetailElement implementation or if its even possible. Appreciate anyone who can help on this. Thanks - Doug

i Have included the main pieces of code in how this was implemented.
Here is the code in my MainForm.c file that defines the detailView GridViewDetailElement for my RadGrid rgDetails.

private void InitializeGridControl()

{

this.rgDetails.TableElement.SetValue(DockLayoutPanel.DockProperty, Telerik.WinControls.Layouts.Dock.Top);

this.rgDetails.TableElement.Margin = new Padding(10, 0, 10, 10);

this.detailView = new GridViewDetailElement();

this.rgDetails.GridViewElement.Panel.Children.Insert(1, this.detailView);

this.detailView.SetValue(DockLayoutPanel.DockProperty, Telerik.WinControls.Layouts.Dock.Bottom);

this.detailView.Margin = new Padding(10, 0, 10, 2);

}

Here is the Class that Defines the GridViewDetailElement (just the relevant code).

public class GridViewDetailElement : GridVisualElement, IGridView

{

private RadGridViewElement gridElement;

private GridViewInfo viewInfo;

public DetailElement detailPanel;

#region Fields

private RadHostItem hostDetailView;

#endregion

#region Initialization

protected override void InitializeFields()

{

base.InitializeFields();

this.UseNewLayoutSystem = true;

this.Padding = new System.Windows.Forms.Padding(10);

this.StretchHorizontally = true;

this.MinSize = new Size(0, 250);

this.MaxSize = new Size(0, 250);

this.DrawFill = true;

this.Class = "RowFill";

this.detailPanel = new DetailElement();

}

protected override void CreateChildElements()

{

base.CreateChildElements();

hostDetailView = new RadHostItem(detailPanel);

this.Children.Add(hostDetailView);

}

public void Initialize(RadGridViewElement gridElement, GridViewInfo viewInfo)

{

this.gridElement = gridElement;

this.viewInfo = viewInfo;

this.gridElement.GridControl.CurrentRowChanged += new CurrentRowChangedEventHandler(GridControl_CurrentRowChanged);

}

public void Detach()

{

this.gridElement.GridControl.CurrentRowChanged -= new CurrentRowChangedEventHandler(GridControl_CurrentRowChanged);

this.gridElement = null;

this.viewInfo = null;

}

public void UpdateView()

{

GridViewDataRowInfo dataRow = this.GridViewElement.GridControl.CurrentRow as GridViewDataRowInfo;

if (dataRow != null)

{

detailPanel.UpdateUCView(dataRow);

}

public RadGridViewElement GridViewElement

{

get { return this.gridElement; }

}

public GridViewInfo ViewInfo

{

get { return this.viewInfo; }

}

#endregion

#region Event Handlers

private void GridControl_CurrentRowChanged(object sender, CurrentRowChangedEventArgs e)

{

this.UpdateView();

}

#endregion

...

}

And Here is my UserControl Code (relevant code only)

public partial class DetailElement : UserControl

{

        public DetailElement()

{

            InitializeComponent();

}

        public void UpdateUCView(GridViewDataRowInfo dataRow)

{

            string statusView;

            if (dataRow != null)

{

                statusView = GetSafeString(dataRow.Cells["State"].Value.ToString());

                switch (statusView)

{

                    case "Running":

                        picBoxStatus.Image = Properties.Resources.start24;

                        break;

                    case "Paused":

                        picBoxStatus.Image = Properties.Resources.pause24;

                        break;

                    case "Stopped":

                        picBoxStatus.Image = Properties.Resources.stop_red24;

                        break;

                    default:

                        picBoxStatus.Image = Properties.Resources.warning16;

                        break;

}

                this.rTxtServiceOwner.Text = GetSafeString(dataRow.Cells["StartName"].Value.ToString());

                this.rTxtServiceType.Text = GetSafeString(dataRow.Cells["ServiceType"].Value.ToString());

                ....

}

private void rChkTrackService_Click(object sender, EventArgs e)

{

        // How Do I pass an update from this CheckBox back to my main Grid ???????????????

}

}

Thanks Doug

GridView

answered on 29 Feb 2012

3 answers

215 views

Highlighting a sentence

Hi,

I've been playing around now for several hours with the question: What would be the best way to highlight a sentence? Keep in mind some sentences end with "?" or "..." By clicking on a button I would like the next sentence to be highlighted. Has anyone worked on this?

Here's a code I have been working with. However, it only highlights the last word of a sentence, but not the last entire sentence.

private void radButtonElement1_Click(object sender, EventArgs e)

{

this.radRichTextBox1.ChangeTextHighlightColor(System.Drawing.Color.White);

this.radRichTextBox1.Document.Selection.Clear();

this.radRichTextBox1.Document.Selection.AddSelectionStart(myNewSentenceStartPos);

myEndPos.MoveToCurrentWordEnd();

do

{

string word = myStartPos.GetCurrentSpanBox().Text;

if (word.Contains("."))

{

DocumentPosition wordEndPosition = new DocumentPosition(myStartPos);

wordEndPosition.MoveToCurrentWordEnd();

this.radRichTextBox1.Document.Selection.Clear();

this.radRichTextBox1.Document.Selection.AddSelectionStart(myNewSentenceStartPos);

this.radRichTextBox1.Document.Selection.AddSelectionEnd(wordEndPosition);

this.radRichTextBox1.ChangeTextHighlightColor(System.Drawing.Color.Aqua);

myStartPos = myEndPos;

myNewSentenceStartPos = myEndPos;

break;

}

else { }

}

while (myStartPos.MoveToNextWordStart());

}

How can I set the start of the selection to myNewSentenceStartPos ?

Thank you,
Karl

RichTextBox (obsolete as of Q3 2014 SP1)

answered on 29 Feb 2012

7 answers

790 views

Gridview summary row conditional sum

I am still using a trial version of GridView to get an idea how powerful the control is. So, far everything is going good except I have no idea how to handle following situation.
The data is as follow

stock1 B 15
stock1 S 45
stock1 B 67
stock1 S 2

Where S-Sell and B-Buy. While grouping on column 1 (stock1) I need to display the position in stock1. But to do that while summing up the result the sell qty should be considered negative. How can I customize this sum operation?

Mitul

GridView

answered on 29 Feb 2012

1 answer

175 views

RichTextBox crashing when openening DocX file

It seems the rich text box is crashing when I try to open a docx document with tables. I couldn't attach a document which throws this error (because the web page doesn't allow docx files), but I can send it to someone interested in this error.

Here is the crash report:

System.NullReferenceException: Der Objektverweis wurde nicht auf eine Objektinstanz festgelegt.

bei Telerik.WinControls.RichTextBox.FileFormats.OpenXml.Docx.StyleRepository.EvaluateProperty[T](Style elementStyle, Style parentStyle, Object propertyKey, T defaultValue)

bei Telerik.WinControls.RichTextBox.FileFormats.OpenXml.Docx.StyleRepository.EvaluateProperty[T](Style elementStyle, Object propertyKey, T defaultValue)

bei Telerik.WinControls.RichTextBox.FileFormats.OpenXml.Docx.Import.ParagraphImporter.ApplyStyle(Paragraph paragraph, StyleRepository styleRepository, Style style)

bei Telerik.WinControls.RichTextBox.FileFormats.OpenXml.Docx.Import.TableImporter.ApplyBlockStyle(TableCell cell, Style style)

bei Telerik.WinControls.RichTextBox.FileFormats.OpenXml.Docx.Import.TableImporter.ApplyConditionalStyle(TableCell cell, TableStyleConstrains availableStyles, Int32 currentRowIndex, Int32 currentColumnIndex)

bei Telerik.WinControls.RichTextBox.FileFormats.OpenXml.Docx.Import.TableImporter.ApplyConditionalStyle(Table table, Style style)

bei Telerik.WinControls.RichTextBox.FileFormats.OpenXml.Docx.Import.TableImporter.Import(Style parentStyle)

bei Telerik.WinControls.RichTextBox.FileFormats.OpenXml.Docx.Import.MainDocumentImporter.BuildBody()

bei Telerik.WinControls.RichTextBox.FileFormats.OpenXml.Docx.Import.MainDocumentImporter.BuildDocument()

bei Telerik.WinControls.RichTextBox.FileFormats.OpenXml.Docx.Import.DocxImporter.Import()

bei TelerikEditor.MainForm.OpenDocument()

bei Telerik.WinControls.UI.BackstageButtonItem.OnClick(EventArgs e)

bei Telerik.WinControls.RadItem.DoClick(EventArgs e)

bei Telerik.WinControls.RadItem.RaiseBubbleEvent(RadElement sender, RoutedEventArgs args)

bei Telerik.WinControls.ComponentInputBehavior.OnMouseUp(MouseEventArgs e)

bei Telerik.WinControls.RadControl.OnMouseUp(MouseEventArgs e)

bei System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)

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

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

bei System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

CAB Enabling Kit

answered on 28 Feb 2012

1 answer

117 views

Appen Text at the end of a document

Does anyone trying to append programmatically some text at the end of an existing RadDocument?

This part of code doesen't works well:

Telerik.WinControls.RichTextBox.FormatProviders.IDocumentFormatProvider p = new Telerik.WinControls.RichTextBox.FileFormats.Html.HtmlFormatProvider();

Telerik.WinControls.RichTextBox.Model.RadDocument document = p.Import(System.Text.Encoding.UTF8.GetBytes(pBody));

document.CaretPosition.MoveToLastPositionInDocument();

document.InsertLineBreak();

document.Insert(pNote, style);

The text was appended at the end of the first word of the document.
Anyone could help me?

Thanks
Francesco

RichTextBox (obsolete as of Q3 2014 SP1)

answered on 28 Feb 2012

4 answers

524 views

[Solved] Force New Row on End Edit

Hi there,

I have a grid which is used for data entry and uses the New Row button.
I have set MasterTemplate.AddNewBoundRowBeforeEdit set to true so that the data is ready to be saved to the database on every cellEndEdit.

It looks like the new row still is not added to the data source until you leave that row by pressing up or down.

I need the new row added to the data source on the very first CellEndEdit. I need this because i have other controls on the form which react to rows being added.

I can use a SendKeys hack to achieve the desired result:

protected void CellEndEdit(object sender, GridViewCellEventArgs e)

{

Save(e.Row.DataBoundItem);

if (e.Row is GridViewNewRowInfo)

{

Debug.WriteLine("Attempting refresh");

SendKeys.Send("{UP}");

}

with this code i can edit a cell, press tab, and i end up on the next cell and the new row button appears below the current row.

Do you know of a better way to produce the same result ?
I've tried GridNavigator.SelectPreviousRow(1) in both CellEndEdit and CellValueChanged and it does nothing.

Thanks,
Matt

GridView

answered on 28 Feb 2012

2 answers

227 views

Cascading Gridviews and Check All header cell

Hi,
I have implemented the 'Check All Header Cell' as shown in this KB article http://www.telerik.com/support/kb/winforms/gridview/add-check-uncheck-all-check-box-in-the-header-cell.aspx.

This works really well in most scenarios but I have run into a small bump in the road. The problem is that I have two grids that are linked in a cascading style. The purpose of this is to fill grid 2 with all of the contacts relating to the selected person or people in grid 1. Again this is all working perfectly for single or multiple selections using the normal check boxes in the rows.

I am hooking in to the ValueChanged event and then checking the cell type to determine if it is a single or check all operation. I set a processing flag to avoid multiple runs of the population code. The flag is reset in the DataBindingComplete event.

private void PupilGrid_ValueChanged(object sender, EventArgs e)

{

//set a processing flag as if the select all checkbox is used this

//event fires for every checkbox in the column!

if (_populatingParentGrid) return;

_populatingParentGrid = true;

if (sender.GetType() == typeof(GridViewCellInfo))

{

//this means the select all box has been checked

RefreshParentGrid(true);

}

else if (sender.GetType() == typeof(RadCheckBoxEditor))

{

//single box checked

RefreshParentGrid(false);

}

private void ParentGrid_DataBindingComplete(object sender, GridViewBindingCompleteEventArgs e)

{

//reset processing flag

_populatingParentGrid = false;

//PupilGrid.Enabled = true; }

The problem I am getting is that the databinding is so fast that the flag is reset almost instantly. The 'Check All' code from the KB article works by setting each checkbox to checked in a loop. This is firing the ValueChanged event and running the Grid 2 population code over and over again resulting in a lengthy delay (30 secs +) when the header cell is clicked.

I need a way to notify my app that the 'Check All' operation has finished (that is all of the check boxes have had their state changed and there are no other ValueChanged events to be raised). The following method from CheckBoxHeaderCell.cs is where I would expect see an event being raised from, but I cannot figure out a way to hook such an event from my app or make it bubble up via the grid.

private void checkbox_ToggleStateChanged(object sender, StateChangedEventArgs args)

{

if (suspendProcessingToggleStateChanged) return;

bool valueState = false;

if (args.ToggleState == ToggleState.On)

{

valueState = true;

}

GridViewElement.EditorManager.EndEdit();

TableElement.BeginUpdate();

foreach (GridViewRowInfo t in ViewInfo.Rows)

{

t.Cells[ColumnIndex].Value = valueState;

}

TableElement.EndUpdate(false);

TableElement.Update(GridUINotifyAction.DataChanged);

//Need to raise an event here to say that the processing has finished

}

I add the column to my grid using the following code, I have checked the events available to 'checkColumn' and there is nothing suitable that I can see.

private void AddCheckColumn()

{

//Telerik code - see above for link

var checkColumn = new CustomCheckBoxColumn {Name = "Select", HeaderText = "All", ReadOnly = false};

//No suitable events found here

PupilGrid.Columns.Insert(0, checkColumn);

var checkColumn2 = new CustomCheckBoxColumn {Name = "Select", HeaderText = "All", ReadOnly = false};

ParentGrid.Columns.Insert(0, checkColumn2);

}

Can you please let me know if there is a way to raise an event from this custom header cell that can be hooked into by my app.

Many Thanks

Chris

GridView

answered on 27 Feb 2012

4 answers

179 views

Remove left side extra space from DropDownButtons

Hi,
Can you please advice how to remove the extra space as highlighted in RED box?
Thanks.

CommandBar

answered on 27 Feb 2012

2 answers

190 views

ComboBoxColumn DropDownList 1st Value Not Selectable

Hi,

I am having trouble with the first value displayed in a dropdownlist. The column is bound to a datasource that contains all possible values in the forms load event. Under the cell editor initialized event I change the drop down list editor element's datasource to only show relevant values based on another columns value. This is all working fine with correct values being populated in the list. However if I select the first value in the drop down list it does not display. All the other values work as expected.

Load event:

Dim ListDisplayColumn As GridViewComboBoxColumn = dgvReportingIndicators.Columns("ListSwitchDisplay")

ListDisplayColumn.DataSource = Me.TrafficLightIndicatorsTableAdapter.GetData

ListDisplayColumn.DisplayMember = "DisplayName"

ListDisplayColumn.FieldName = "ListSwitch"

ListDisplayColumn.ValueMember = "ID"

CellEditorInitialized event:

If e.Column.Name = "ListSwitchDisplay" Then

Dim dropDownEditor = TryCast(dgvReportingIndicators.ActiveEditor, RadDropDownListEditor)

Dim element = TryCast(dropDownEditor.EditorElement, RadDropDownListEditorElement)

Select Case e.Row.Cells("IndicatorTypeDisplay").Value

Case "Count"