Questions on UI for WinForms Forum

2 answers

88 views

I have 2 grids that I bind to when selecting a vendor from the drop down and click the search button(griderror.jpg shows before I click search). Before they get their data I add a command column to each grid, works with no problems. When I click the search button they both get their data with no problems and everything looks good(GridError2.jpg shows that the data properly populated). When I click the button in the command column of the first grid it does exactly what it is suppose to. If I click the command column in the 2nd grid it errors out with the original - Object reference is not set to an instance of an object. If I do not load the first grid, but just the 2nd grid it does not error out.

Private Sub rgvDocumentsPO_CommandCellClick(sender As Object, e As System.EventArgs) Handles rgvDocumentsPO.CommandCellClick

Dim VendorID As Integer = ddlDocumentsVendor.SelectedValue

Dim documentid As Integer = rgvDocumentsPO.CurrentRow.Cells("Document ID").Value

If DataLayer.UnconfirmDocument(documentid) = True Then

LoadDocuments(VendorID)

Else

RadMessageBox.Show("You can not unconfirm this document.")

End If

End Sub

Private Sub rgvDocumentsDrawings_CommandCellClick(sender As Object, e As System.EventArgs) Handles rgvDocumentsDrawings.CommandCellClick

Dim VendorID As Integer = ddlDocumentsVendor.SelectedValue

'It errors out on this next line, but not the same line in the above Sub

Dim documentid As Integer = rgvDocumentsDrawings.CurrentRow.Cells("Document ID").Value

If DataLayer.UnconfirmDocument(documentid) = True Then

LoadDocuments(VendorID)

Else

RadMessageBox.Show("You can not unconfirm this document.")

End If

End Sub

This is the function that loads the grids

Public Sub LoadDocuments(ByVal VendorID As Integer)

Try

Dim CommandColumn As New GridViewCommandColumn

CommandColumn.Name = "Unconfirm"

CommandColumn.HeaderText = ""

CommandColumn.DefaultText = "Unconfirm"

CommandColumn.UseDefaultText = True

CommandColumn.TextAlignment = ContentAlignment.MiddleCenter

If rgvDocumentsDrawings.RowCount = 0 Then

rgvDocumentsDrawings.Columns.Add(CommandColumn)

End If

If rgvDocumentsPO.RowCount = 0 Then

rgvDocumentsPO.Columns.Add(CommandColumn)

End If

Catch ex As Exception

End Try

rgvDocumentsPO.DataSource = DataLayer.GetActiveDocumentsByDocTypeAndVendor(2, VendorID)

rgvDocumentsDrawings.DataSource = DataLayer.GetActiveDocumentsByDocTypeAndVendor(3, VendorID)

rgvDocumentsPO.Columns("Document ID").IsVisible = False

rgvDocumentsDrawings.Columns("Document ID").IsVisible = False

rgvDocumentsPO.Columns("Unconfirm").Width = 100

rgvDocumentsDrawings.Columns("Unconfirm").Width = 100

rgvDocumentsPO.BestFitColumns()

rgvDocumentsDrawings.BestFitColumns()

End Sub

Any ideas on why this might be firing an error?

Thanks,
Chuck

GridView

answered on 19 Dec 2011

2 answers

229 views

WinForms the right solution for simple frontend (how include radcontrols)

Good day to all

I have an Public Area Dispaly System that usually pulls data from an access database. Now I need to make a new database which of course needs a new front-end. I know sql and tables quite well but am have never greatly worked with front-ends in access.

So since I know radtools for asp.net ajax I was wondering if it could make sense to programm the front-end with winforms.

Having never worked with WinForms it took me a good 2 hours yesterday to come figure out simple stuff.

I made a simple application with a RadMenu and when an menu item is clicked a new form gets shown. I published it to my server to check what happens if I try to install it on my windows tablet at home
- I did not have SQL Express 3.5 which was installed fast and automatically
- I got an error about TelerikContorls needed in GAC

So here come a bunch of questions

- Would it be simple to keep the whole thing in access (its not a very complicated database. Imagine a simple address database with a second table for countries)
- If WinForms would be an alertnative. Whats the best DB to be used to get the simplest installer process, user requirements if nothing is installed
- Can I use TelerikRad Tools for an application that I give away. Can I kind of embed the radControls (in web it would be a simple matter of bin folder)

Sorry for these very very basic questions.

Markus

General Discussions

answered on 19 Dec 2011

1 answer

102 views

PDF View

Hello, i am not sure where to put this topic but here it goes.
in one of your recent videos i saw something about a beta feature of pedf viewing in winforms.
I wonder if is it possible in winforms.
I know you have that tool for silverlight, but if there is anyway i can make it in winforms i would apreciate your help as i urgently need it in my application.
Best regards,

Rui SIlva

General Discussions

answered on 19 Dec 2011

1 answer

53 views

Telerik application embedded in other application

We have an application which uses a lot of Telerik Controls, everything works fine when we run the application stand-alone.

But one of the featuers is to run the application inside a GIS (Geographic Information Systems) app and interact.

But some of the telerik controls does not work inside theese programs (Mapinfo & ArcGIS) sometimes, they are not shown. Sometimes they are shown with a white box and a red cross. And sometimes our application crash when a telerik controls i activated.

Is there any knowledge about this issue?

General Discussions

answered on 19 Dec 2011

1 answer

81 views

RadChart renders as large red X

I have a RadChart and have used the documentation here :http://www.telerik.com/help/winforms/chart-building-radcharts-creating-radchart-programmatically-more-complex-example.html to create what I need. However, the RadChart does not display the data, leaving only a large red X in its place. This is the constructor for my form:

public ReportPreview(CalculationResults results)

{

InitializeComponent();

ReportChart.ChartTitle.TextBlock.Text = @"Report";

ReportChart.Series.Clear();

var chartSeriesA = new ChartSeries {Type = ChartSeriesType.Bezier, Name = @"Elevation"};

chartSeriesA.Appearance.LineSeriesAppearance.Color = Color.DarkBlue;

chartSeriesA.Appearance.PointMark.Dimensions.Width = 5;

chartSeriesA.Appearance.PointMark.Dimensions.Height = 5;

chartSeriesA.Appearance.PointMark.FillStyle.MainColor = Color.Black;

chartSeriesA.Appearance.PointMark.Visible = true;

var chartSeriesB = new ChartSeries {Type = ChartSeriesType.Bezier, Name = @"Predicted Elevation"};

chartSeriesB.Appearance.LineSeriesAppearance.Color = Color.DarkBlue;

chartSeriesB.Appearance.PointMark.Dimensions.Width = 5;

chartSeriesB.Appearance.PointMark.Dimensions.Height = 5;

chartSeriesB.Appearance.PointMark.FillStyle.MainColor = Color.Black;

chartSeriesB.Appearance.PointMark.Visible = true;

for (int i = 0; i < results.CurveFittingDataList.Count; i++)

{

chartSeriesA.AddItem(new ChartSeriesItem((double)results.CurveFittingDataList[i].AngularLoc, (double)results.CurveFittingDataList[i].Elevation));

chartSeriesB.AddItem(new ChartSeriesItem((double)results.CurveFittingDataList[i].AngularLoc, (double)results.CurveFittingDataList[i].PredictedElevation));

}

ReportChart.Series.Add(chartSeriesA);

ReportChart.Series.Add(chartSeriesB);

ReportChart.PlotArea.XAxis.AxisLabel.TextBlock.Text = @"Location Angle";

ReportChart.PlotArea.YAxis.AxisLabel.TextBlock.Text = @"Elevation";

ReportChart.Update();

}

No exception is thrown, no errors and the data is constructed properly. I have no idea on what to do next.

Chart (obsolete as of Q1 2013)

answered on 19 Dec 2011

9 answers

754 views

Detect clicking on a chart data item

How do you detect what data item a user clicks on with the mouse.
For example a user clicks on a certain piece of a pie chart or a specific bar on a barchart. Another possible feature would be to detect the X position in a line chart while the mouse hovers over it so you could display the Y value.

John Schneider

Chart (obsolete as of Q1 2013)

answered on 17 Dec 2011

1 answer

161 views

DocumentTabStrip Close Button hovered image

Hi Telerik

I want to replace the image displayed when ShowCloseButton is active on a document tabstripitem while maintaining its hover and pressed image behaviour.

I create the dodument window at run time and I can get the image to change to a static image using the following line

            document.TabStripItem.CloseButton.Image = Resources.GreenTickNormal22;

where "document" is typeof(DocumentWindow)

I also have added the following lines to get the image to change but these lines don't seem to be working

            document.TabStripItem.CloseButton.ImageHovered = Resources.GreenTickHover22;;
            document.TabStripItem.CloseButton.ImageClicked = Resources.GreenTickClick22;

Am I missing and event somewhere which needs to be raised?

Regards
Ian Carson

Dock

answered on 16 Dec 2011

2 answers

114 views

Rad grid Hierarchy of one to many relations

Hi,

I have rad grid as per my requirement I need to show the details in one to many relations. As per my finding I found that it will possible on tab wise(Side by side)

http://www.telerik.com/help/winforms/gridview-hirarchical-grid-hierarchy-of-one-to-many-relations.html.

But my requirement is one to many relations is one followed by another not side by side.

Please let us know what we need to do to get this to work.

THANKS!

GridView

answered on 16 Dec 2011

1 answer

129 views

Row editing ?

Hello,

Using a RadGridView to make operation on a datatable/dataset,

If I create or edit a record, and the click on another line, or event some times on another cell from the same line/record,

I get an exception in 'Program.cs' (the starter class generated by Visual Studio containing Main() method)
on line Application.Run(new MyForm());
It say 'NoNullAllowedException crosser a native/manager boundary.'/'Column ... does not allow null.'

It seems that this exception can not be caught so my app crashes.
It doesn't seem to be firing the cell end edit event.

I understand this come from the dataset validation.

If the user strictly can not click out of the row while all data are not filled and valid, I think that's too restrictive.

How could I catch or manager this exception in a more user friendly way ? If possible.

Thank you for help,

Thomas

GridView

answered on 16 Dec 2011

5 answers

157 views

SelectedObject: the Grid will be initialized again

I have the problem that, when i use the SelectedObject method from the propertygrid then will be the grid initialized again.
and the current view from the grid will be set to the default view. for example (all open properties will be closed)

the WindowsForm PropertyGrid do this not!
how can i change this behavior?

BR
Sebastian

PropertyGrid

answered on 15 Dec 2011