Questions on UI for WinForms Forum

7 answers

351 views

Morning,

I think this question is not directly Telerik related but hopefully someone can help.

I have a datepicker and gridview databound. When I select a row on the gridview, the datepicker updates as I would expect but if I select a row with a blank date (DBNull I believe?) then it still retains the avlue from the previously picked date but still treats it as a null value.

I have looked through all the options I can think of in Formatting and Advanced Binding but nothing seems to work. I have also looked at ways of refreshing the databinding on row change but got no where (plus I don't think that's really the correct way of doing things).

If anyone could help or point me in the right direction i'd really appreciate it!

Kind regards,

Guy

Calendar, DateTimePicker, TimePicker and Clock

answered on 04 Nov 2010

3 answers

105 views

Migration from Rad Controls Winforms Q1 to Q2 2010

Hi All,
I have a project developed in .NET 3.5 framework using Rad Controles Winfoms Q1. I want to confirm that project developed using Rad Controls Winforms Q1 is compatable with Rad Controls winforms Q2 2010 with out any chane in code.

Thanks
Vijay

General Discussions

answered on 04 Nov 2010

4 answers

843 views

Very slow sorting with 100,000+ rows problem

I have multiple grids with 100,000+ rows in them. I found that allowing RadViewGrid control to do the sorting is very slow and freezes the application while sorting. I am thinking about implementing a SortableBindingList and do my sorting outside the grid and force it to show the newly sorted BindingList when done.

However, this means I have to turn sorting off in the grid, loosing the sort indicator and the context menu options for sorting.

What would you suggest in this scenario?

Thanks,

Phi

GridView

answered on 04 Nov 2010

5 answers

1.3K+ views

AddRange and GridView performance

Hi all,

I am experimenting some troubles in speeding up the filling of a RadGridView. If I fill it row by row (Add method) the result is correct but slow (more than 10s for 300 rows). If I create a GridViewRowInfo array and then fill the Grid with AddRange the task is completed istantaneously, but then the result differs from the one obtained through the Add method (problems in row selection and column resize, not depending on the AllowX properties). In particular I think the my errors are in creating each GridViewRowInfo, that needs a GridViewInfo that needs a GridViewTemplate. Here the code:

GridViewTemplate template = new GridViewTemplate();

template.AllowColumnResize = true;

foreach (GridViewColumn col in myGrid.Columns)

template.Columns.Add((GridViewDataColumn)col);

GridViewInfo info = new GridViewInfo(template);

GridViewRowInfo row = new GridViewRowInfo(info);

row.AllowResize = true;

// oRow contains the values for the cells

for (int i = 0; i < oRow.Length; i++)

row.Cells[i].Value = oRow[i];

row.Tag = epropSample;

Hope someone could help!
Thanks in advance!
Roberto

GridView

answered on 04 Nov 2010

5 answers

259 views

[Solved] Disposing Image Property

I often use image with Telerik controls such MenuItem, buttons, ect. via the Image property or BackgroundImage property.

Do I need to dispose of these images myself?

Thanks,

Phi

General Discussions

answered on 04 Nov 2010

5 answers

241 views

[Solved] set focus on the time part by default?

Hello,

Is there any method to achieve this behavior?

BR/shortie

Calendar, DateTimePicker, TimePicker and Clock

answered on 04 Nov 2010

26 answers

725 views

[Solved] Application Exception

Hi,

First of all I hope I'm posting this in the right place.

I have just finished building my first application, published it and have now (as best as I can tell) installed it on a couple of machines.

Unfortunately when the users are trying to add a row on a gridview they are getting the following error message.

System.InvalidOperationException: Items cannot be added to the RadListSource when is in data-bound mode

I have no idea what this is or how to resolve it. I've tried various searches with little results. The application works perfectly when I'm in design mode but I too get the same error so I think I have ruled out any DotNet issues.

I'm really hoping someone here can help.

Kind regards,

Guy

General Discussions

answered on 04 Nov 2010

1 answer

112 views

[Solved] Closing Pop up Radwindow

Hi,

I have a button(addproduct) on my Product.aspx page and when I click on that button I get a pop up window(radwindow) whose url points to some other page(productsearch.aspx) which has a cancel and save button. Now, What I need to do is, when I click the cancel button, the popup window should close and I should be back on the product page without losing whatever data I already have in the product.aspx page.
I need to do this on the client side so I have to use javascript. The code which I have for the window popup is

function openWin(){
var oWnd = radopen("../product/Productsearch.aspx","productsearchwindow");
return false;
}

the productsearchwindow is the id of the radwindow and I call the openWind() function on the onclientlclick event of the addproduct button on product.aspx page

I probably have to write some javascript in the productsearch.aspx page as the save button is in that page and the popup url points to this productsearch page.

Can anyone help me in writing the js code.

Thank You,
Vik

General Discussions

answered on 04 Nov 2010

5 answers

276 views

call from select row radgridview

hi could help me
as calling a window from
by selecting a row in radgridview

when selecting a row to me there will be a window

GridView

answered on 04 Nov 2010

2 answers

162 views

Calling code in SelectedNodeChanging does not hightlight selected node.

We have a scenario where, a user will select a Treeview node in which we perform logic within the SelectedNodeChanging event. Using e.Node we are able to validate that the node being selected is the correct node. However after performing logic in using the SelectedNodeChanging event, the newly selected node does not show as highlighted in the treeview.

We have validated that the clicked node is in fact the selected node in the treeview, however it simply does not show it as selected by being highlighted.

Are we missing something? Is there something else that we have initialize or call to show the node (e.node) highlighted?

DropDownList

answered on 03 Nov 2010