Questions on UI for WinForms Forum

1 answer

200 views

[Solved] Cell Read only property in DataGrid View

Hi Telerik Team,

Is there any option to assign read only property to a particular cell in the Data grid view.
I need to make some cells read only in a column to support some functionality. Please provide solution for he Query ASAP.

Regards
Sandeep.

GridView

answered on 16 Nov 2010

11 answers

340 views

2010 Q3: DropDownList RadListDataItem Binding Bug?

Hi!

I was using Q2, 2 dropdownlists with prices binded to it and it worked fine:

RadListDataItem rcbi0 = new RadListDataItem("ANY");

RadListDataItem rcbi1 = new RadListDataItem("1");

RadListDataItem rcbi2 = new RadListDataItem("10");

RadListDataItem rcbi3 = new RadListDataItem("15");

RadListDataItem rcbi4 = new RadListDataItem("20");

RadListDataItem rcbi5 = new RadListDataItem("25");

RadListDataItem rcbi6 = new RadListDataItem("30");

RadListDataItem rcbi7 = new RadListDataItem("40");

radDropDownListPriceMin.Items.AddRange(new[]{ rcbi0, rcbi1, rcbi2, rcbi3, rcbi4, rcbi5, rcbi6, rcbi7});

radDropDownListPriceMin.SelectedIndex = 0;

radDropDownListPriceMax.Items.AddRange(new[]{rcbi0, rcbi1, rcbi2, rcbi3, rcbi4, rcbi5, rcbi6, rcbi7});

radDropDownListPriceMax.SelectedIndex = 0;

Now , the same above code but with Q3, binds the RadListDataItems to radDropDownListPriceMax BUT

radDropDownListPriceMin is empty!



This code works fine in Q3:

string[] pricesList = new string[7];

pricesList[0] = "ANY";

pricesList[1] = "1";

pricesList[2] = "10";

pricesList[3] = "15";

pricesList[4] = "20";

pricesList[5] = "25";

pricesList[6] = "30";

radDropDownListPriceMin.Items.AddRange(pricesList);

radDropDownListPriceMin.SelectedIndex = 0;

radDropDownListPriceMax.Items.AddRange(pricesList);

radDropDownListPriceMax.SelectedIndex = 0;

How come?

Rafael

DropDownList

answered on 16 Nov 2010

12 answers

453 views

[Solved] row removed event

hi,

i have used the CreateRow event in the gridview

now i need to know witch event is the opposite of this event

i need to know the removeRow event in the grid because i can't find it.

thanks.

GridView

answered on 16 Nov 2010

5 answers

1.2K+ views

[Solved] CellValueChanged event not fired

Hello everybody.

I'm having the current problem with RadGridView (using Q2 2010):

The GUI has the following structure: RadRibbonForm contains SplitPlanel contains UserControl contains RadGridView.
Now, the GridView is bound to a List of objects. I'm using a CheckBox column for one property.

Now, I click into the checkbox cell, changing the ToggleState of the checkbox, but do not leave the cell by clicking on a different row. I do some necessary logic in the GridView_CellValueChanged event handler.
The I click the Save-Button which is located on the RibbonForms QuickAccessBar, but the data is not correctly saved.

After debugging, I realized that the CellValueChanged is neither triggered, when I click into the cell, nor when I click the Save-Button (would have thought so, because the cell should lose focus, accepting my data change).
If I click into a different row, my change to the combobox is accepted and correctly saved.

What can I do to solve this problem? Is there a method to make the grid change its cell values without leaving the edited row?

Thanks for any help

GridView

answered on 16 Nov 2010

1 answer

191 views

[Solved] Select some row on filter changing

Hi,
I'm using the RadGridView in which I always wanted to keep a row selected, in the case when the filter expression is changed, all the rows are unselected. I presume that the filtering row is selected at that time.
So I subscribed the FilterChanged event, and at which I select the first row. The problem I'm facing is that, the filter changed event is generated for every character I type, and the focus switches to the first row.

Please help me out for finding a solution. Thanks.

Regards
ArunDhaJ
www.arundhaj.com

GridView

answered on 16 Nov 2010

3 answers

388 views

[Solved] bind image to a databind combobox

Hello,

I am new at this as I am trying to learn and get comfortable with Telerik. I have a winform app with 2 combo boxes, which are bind from a dataset/datatable. And I would like some sample code on how to bind different images to all each item in my combo box 1 and combo box 2.

After that I would like to code for the selected_index changed of the combo box 1. I would like to re-bind the data of the combo box 2 base on the selection on combo box 1.

I can do all of that in the normal combo box where I manually typed in all the items to the combo box and then uses the RadListDataItem Collection Editor to add in the images....but I want to do it with code as my combo box 2 changes base on the selection of combo box 1.

Thanks.

ComboBox and ListBox (obsolete as of Q2 2010)

answered on 16 Nov 2010

2 answers

271 views

[Solved] Set readonly property on the cell level

Is it possible to set the readonly property of a single cell in a row or column? I want certain cells to be readonly based on other data in the row.

Thanks

GridView

answered on 15 Nov 2010

3 answers

437 views

Getting System.Reflection.TargetInvocationException error when setting datasource

I updated to version 2010.3.10.1109 from 2010.2.10.914 and when I set the datasource I now get TargetInvocationException
"Exception has been thrown by the target of an invocation.". It was working fine in the previous version.

Any ideas?

Thank you,
Aaron

GridView

answered on 15 Nov 2010

2 answers

156 views

Memory leak after scheduler refresh

Hi

I have scheduler with resources showed in timeline view. Every 5 second scheduler is refreshed (check if there is any changes in scheduler data source). After that, for some reason, resources lose their color (became gray), so they need to be repainted, like this:

For Each res As Resource In RadScheduler1.Resources

res.Color = Color.Aquamarine

Next

To ensure that resources are repainted, I need to call this part of code:

Dim schtimelineGrouping As TimelineGroupingByResourcesElement = TryCast(RadScheduler1.SchedulerElement.ViewElement, TimelineGroupingByResourcesElement)

schtimelineGrouping.RefreshViews(True)

schtimelineGrouping = Nothing

And it seems that this procedure RefreshViews make a problem with memory leak.

To be sure, I created a test application which every 5 second execute only coloring and refreshing of scheduler resources, for example:

For Each res As Resource In RadScheduler1.Resources

res.Color = Color.Aquamarine

Next

Dim schtimelineGrouping As TimelineGroupingByResourcesElement = TryCast(RadScheduler1.SchedulerElement.ViewElement, TimelineGroupingByResourcesElement)

schtimelineGrouping.RefreshViews(True)

schtimelineGrouping = Nothing

In a short period of time (1 hour) application increased memory usage from 44MB to over 100MB.

In a real application memory usage growth to more than 1.5GB, and than Out of Memory exception occurred. For a testing purposes application was working almost for a 24 hours.

Is this a good approach of resource coloring, and how this can be fixed?

Thanks.

Scheduler and Reminder

answered on 15 Nov 2010

5 answers

268 views

Align cells to export

I have the following problem in windows application.

I am creating columns by code and then adding rows. As in the following example:

textcolum dim as gridviewtexboxcolumn
textcolum = new gridviewtexboxcolumn
textcolum.fieldname = "name"
textcolum.textalignment = contentaligment.middlecenter
....
....

rowinfo = me.GRID.rows.addnew ()
rowinfo.cells (0). value = "Peter bad"

export to excel, the column name is not justified to center, as I indicated in the code, but is justified on the left.

help please!

GridView

answered on 15 Nov 2010