Questions on UI for WinForms Forum

8 answers

2.0K+ views

GridViewDateTimeColumn with empty/null value

I'm binding a GridView to a datasource with Date/Time fields which may be null or empty. I'd like to either display "none' or a blank string in the column, but no matter what I do it always shows up as "1/1/0001 12:00:00 AM".

How can I at least hide this text?

GridView

answered on 30 Apr 2012

5 answers

189 views

Runtime problem with RadDocument's DocumentContentChangedInterval deign time property

Hello ,
I developed a rich text box user control fro my application purpose. However, for each form or user control I added it, a code block is getting added automatically in designer file. Following is the code block:
radDocument1.DefaultStyleSettings = styleDefinition1;
radDocument1.DocumentContentChangedInterval = System.TimeSpan.Parse("00:00:00.0000100");
radDocument1.HyperlinkNavigationMode = Telerik.WinControls.RichTextBox.HyperlinkNavigationMode.CtrlClick;
radDocument1.HyperlinkToolTipFormatString = "{0}\r\n{1} to follow link";
.......
The main problem is with the statement radDocument1.DocumentContentChangedInterval = System.TimeSpan.Parse("00:00:00.1000100");
This line causes a run time exception saying the interval should not be zero.
However, if I try to change the value, it gets automatically reset every time if a deign change occur on form/control.
So, I need to look for this entry and change it to some non-zero value before every run.

Please help me out to get rid if it.

Thanks
--Pawan

RichTextBox (obsolete as of Q3 2014 SP1)

answered on 30 Apr 2012

3 answers

135 views

In office2010blue theme should not change the button's font.

Hi~
my winform version is 2012.1.321.40
In office2010blue theme should not change the button's font.
but another themes are change good.
only office2010blue theme should not change the button's font.

what can i do?

Buttons, RadioButton, CheckBox, etc

answered on 30 Apr 2012

3 answers

287 views

[Solved] CommandBarTextBox Validating event

I use an errorprovider on a radform to show input errors to the user. I can use it with a radtextbox when the validating event is triggered like so:

errProvider.SetError(txtBox, errMsg)

errProvider.Icon = Icon.FromHandle(My.Resources.input_error.GetHicon())

errProvider.SetIconAlignment(txtBox, ErrorIconAlignment.MiddleLeft)

Where txtBox is a RadtextBox.

2 problems I encounter when using a CommandBarTextBox:
first: raising the validating event
second: using the SetError method of the errorprovider to link it to a CommandBarTextBox.

I tried adding the validating event in the form_load event:

AddHandler txtPIN.TextBoxElement.TextBoxItem.Validating, txtPIN_validating()

Private Sub txtPIN_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs)

If HuidigeAccount.Instance.Gebruikers.Count > 0 Then

FormHelper.RequiredTextBox(txtPIN.TextBoxElement, _errProvider, _errProviderMsg, "Er is een pincode vereist om op te slaan")

End If

End Sub

But vs2010 throws me a compile error:
Argument not specified for parameter 'sender' of 'Private Sub txtPIN_Validating(sender As Object, e As System.ComponentModel.CancelEventArgs)'.
Argument not specified for parameter 'e' of 'Private Sub txtPIN_Validating(sender As Object, e As System.ComponentModel.CancelEventArgs)'.

Not being able to use the errorprovider, a work around using the commandbartextbox border forecolor is an acceptable solution. But not being able to use the validating event of the CommandBarTextBox, I can't work around that one...

CommandBar

answered on 30 Apr 2012

5 answers

228 views

Grid display orientation.

Hi,

I have a grid wthere there are lot of columns to be fit in the screen. and I don't want to have a scrollbar to diplay all the columns.

is there are way to change the display orientation to display columns verticallty?

Regards,
Khizar

GridView

answered on 30 Apr 2012

5 answers

378 views

RadGridview causing Exception

Hello,

When I try to insert,update or delete the data through the RadGridview of the program,
if it occurred the pop up error message from the Database(ex:primary key constrain),
the RadGridview will be freezed,then I can't edit the data in the RadGridview any more,
if I force it to work,sometimes cause the program crashed,
I must restart the program to let RadGridview work normally again,
is this problem fixed in the latest version? if not,how to solve this problem?
I use the 2008 Q2 SP1,DB is SQL Server 2005.

Best regards.

GridView

answered on 30 Apr 2012

1 answer

249 views

[Solved] Checkbox does not trigger selected item

When You select a checkbox in the list view, the selected item is not updated. I want to limit the user to the number of checkboxes checked -10. How can this be done? I can keep count of the total, but when the user goes over the total, I can put up a messagebox but have no way of knowing what the 11th checked so I can uncheck it.

CheckedListBox

answered on 30 Apr 2012

6 answers

733 views

[Solved] Alternate row color

Is it possible to have alternate row colors in listview?

Thanks,

Javier Gonzalez de Aragon

ListView

answered on 30 Apr 2012

22 answers

1.3K+ views

Custom sort order for grid

I was able to create my own sort order for a radtreeview pretty easily by creating an IComparer class, but I appear to be locked in to Ascending/Descending/None for the GridView.

Is there any way (I'm fine with inheriting objects if necessary) to allow a custom sort order in a GridView? I also don't want to apply that sort order right away, I only want it to occur if the user chooses to sort the column in question.

GridView

answered on 30 Apr 2012

4 answers

195 views

set SelectedObject but don't Initialization

How to update data on RadPropertyGrid?

I want to change propertygrid data, whever change listview selection.
but, it's not refresh, but also append...

What's wrong with my code?

Here is my code...

private RadPropertyStore CreatePropertyStore(string uid)

{

RadPropertyStore vInfoStore = new RadPropertyStore();

DataTable dt = Global.www.GetVirtualMachine(uid);

PropertyStoreItem v_nm = new PropertyStoreItem(typeof(string), "Name", dt.Rows[0]["v_nm"],

"Name", "INFO");

vInfoStore.Add(v_nm);

return vInfoStore;

}

private void radListView1_SelectedIndexChanged(object sender, EventArgs e)

{

ListViewDataItem item = radListView1.SelectedItem;