Questions on UI for WinForms Forum

3 answers

362 views

Hi.

An exception is thrown when I reset my data source (first to null to clear it), but I dont know when it really happens. It happens very seldom but it does happen.

Object reference not set to an instance of an object.

at Telerik.WinControls.UI.TableViewDefinitionBase.GetRowHeight(GridViewRowInfo rowInfo, IGridView gridView)

at Telerik.WinControls.UI.GridTableBodyElement.GetRowHeight(GridRowElement row, Single y, SizeF availableSize)

at Telerik.WinControls.UI.GridTableBodyElement.ArrangeOverride(SizeF finalSize)

at Telerik.WinControls.RadElement.ArrangeCore(RectangleF finalRect)

at Telerik.WinControls.RadElement.Arrange(RectangleF finalRect)

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

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

Thanks,

-j

GridView

answered on 18 Dec 2018

3 answers

513 views

.Exe won't run on other computers

Hello everyone,

I've built an application using winforms (c++) and Telerik and when i run it from the computer i made it on, it works with no problems. However once i copy it over to my laptop, the .exe file simply won't run. No error messages, it just doesn't open. I have tried it on another computer and got the exact same problem.

I followed the guide here: https://docs.telerik.com/devtools/winforms/deployment-and-distribution/application-deployment

All the .dll files are in the same folder as the .exe and yet it still does not work. Has anyone had this problem before and would they be able to help me fix this please?

Thank you!

General Discussions

answered on 17 Dec 2018

3 answers

115 views

Control saying its null when selected

I have a control RadMultiColumn Control on my form as you can see here its showing Telerik.WinControls.UI.GridViewDataRowInfo in the text box however when selecting the option it then throws a null statement.

dpStockSelection.DataSource = _sageManager.ProductFetchAll();

public List<Product> ProductFetchAll()

{

if (!IsConnected)

throw new Exception("Not connected to Sage");

List<Product> products = new List<Product>();

SageDataObject230.IStockRecord sageStockRecord = (SageDataObject230.IStockRecord)_workSpace.CreateObject("StockRecord");

try

{

if (sageStockRecord.MoveFirst())

{

do

{

products.Add(CreateProduct(sageStockRecord));

} while (sageStockRecord.MoveNext());

}

finally

{

sageStockRecord = null;

}

return products;

}

MultiColumn ComboBox

answered on 17 Dec 2018

0 answers

116 views

Applying Filter

I am using Q1 2008 Winforms.

There is radgridview named 'gv'. gv is filling with some manipulated data. I can filter by clicking and selecting some values. I want to filter wiht my own buttons. Basicially i created filter like this:(c#)

01.private void btFilter3_Click(object sender, EventArgs e)

02.{

03. gridTest.EnableFiltering = true;

04. this.gridTest.FilterDescriptors.Remove("IssueDate");

05. FilterDescriptor filter = new FilterDescriptor();

06. filter.PropertyName = "IssueDate";

07. filter.Operator = FilterOperator.IsGreaterThan;

08. filter.Value = DateTime.Now.AddMonths(-5);

09. filter.IsFilterEditor = true;

10. this.gridTest.FilterDescriptors.Add(filter);

11.}

By clicking the button code is running. On Screen; the date value (what i described above) is appearing on filter area. But data on the gv isn't filtering.

When i filter with another value(date) manually, gv is filtering. After that manually process when run code by clicking the button, code is running and data on the gv is filtering also.

I need filter without manually process.

What am i missing?

DataFilter

asked on 14 Dec 2018

2 answers

856 views

Scrollbar width on DropDownList

Hi, we used to use Telerik version 2012. Sometimes we needed to have wider scrollbar on dropdownlist for example on touchscreens. Now in Telerik 2018 when we change scroll width in windows regedit all applications change their scroll width except this one with Telerik. How can we change scroll width now?

DropDownList

answered on 14 Dec 2018

7 answers

402 views

RadMessageBox Position

Hi everyone,

when a radmessagebox pops up , its not exactly on the center of screen .

How to align it to the center of screen?

MessageBox

answered on 14 Dec 2018

5 answers

186 views

RadGridLocalizationProvider : custom GroupingPanelDefaultMessage

I want to give each of my grids a custom GroupingPanelDefaultMessage based on which column(s) is/are groupable. For example,

"To show sales grouped by Division, drag that column-header here".

I hope it is not necessary to create a custom LocalizationProvider for each such customization. Is it? If so, the following doc doesn't provide enough info:

http://www.telerik.com/help/winforms/gridview-localization.html

I don't see an object called RadGridLocalizationProvider anywhere. 
Is the RadGridLocalizationProvider an  object encapsulated by the grid?

Thanks

GridView

answered on 14 Dec 2018

3 answers

908 views

Moving the splitter programmatically

hi,

How can i move the spliiter programmatically? what i like to do is to mimic the behavior of the splitter in your examples. I intend to add a button to the panel and change the position of the splitter. I have tried to use the collapse property, but it also hides the button. therefore i need to change the splitter position my self and leave a little space for the toggle button.

I have also tried to use the prev and next buttons on the splitter, by they are hidden as well when the panel is collapsed.

Thanks,

Sharon.

SplitContainer

answered on 14 Dec 2018

9 answers

1.8K+ views

Access only filtered rows in grid

How do I access only the filtered rows in a grid. I basically need to select the first row that is visible after setting a filter. I also have other needs for accessing only the rows that are still visible after a filter, but this is my first need.

GridView