DateTimePicker crash

[Olli]

how can i avoid DateTimePicker crashing?
when I set DateTimePicker to minimum value of 01.01.0001 (ex. when you set it to Null value) and then open calendar (positioned at 01.01.0001) and move a month (or a year) earlier - application crashes.

when it's a simple DateTimePicker i can set a minimum value and a null value to secure the situation.
but when DateTimePicker is a part of RadGridView column type of DateTime, i have no ability of setting values of Minimum or Null for it. 

do you have any solutions for this situation?

[Peter]

Hello Olli,

Thank you for writing.

You can access the DateTime editor in the CellEditorInitialized event, for example:

void radGridView1_CellEditorInitialized(object sender, GridViewCellEventArgs e)
{
    RadDateTimeEditor editor = e.ActiveEditor as RadDateTimeEditor;
    if (editor != null)
    {

        RadDateTimeEditorElement element = editor.EditorElement as RadDateTimeEditorElement;
        element.MinDate =...;
        element.NullDate=...;
    }
}

I hope this helps. All the best,
Peter
the Telerik team

[Olli]

hi, Peter!
thanks a lot for your code - it works perfectly!

as far as i am a little bit lazy, and the project has a set of gridviews with the same requirements, i created an extension class based on your example:

public static class Extensions
{
public static DateTime DatePickerMinDate = new DateTime(1900, 01, 01);
public static DateTime DatePickerNullDate = DatePickerMinDate;
public static void SetDateRestriction(this RadGridView theGrid)
{
theGrid.CellEditorInitialized -= theGrid_CellEditorInitialized;
theGrid.CellEditorInitialized +=new GridViewCellEventHandler(theGrid_CellEditorInitialized);
}

static void theGrid_CellEditorInitialized(object sender, GridViewCellEventArgs e)
{
  RadDateTimeEditor editor = e.ActiveEditor as RadDateTimeEditor;
if (editor != null)
{
RadDateTimeEditorElement element = editor.EditorElement as RadDateTimeEditorElement;
element.MinDate = DatePickerMinDate;
element.NullDate = DatePickerNullDate;
}
}
}

so the only thing left to do is just attaching date restrictions to the required editable gridview having datetime cells - it is easily done by calling extension method after initializing control, for example:

public partial class PaymentHistoryView: UserControl 
{
public PaymentHistoryView()
{
InitializeComponent();

PaymentHistoryGridView.SetDateRestriction();
}

// ...
}

the realization is not very flexible, but it meets all current requirements and it can be upgraded easily if needed.

thanks again for your help.

[Peter]

Hi Olli,

Thank you for sharing your solution with the community. I am sure that someone will benefit from it.

Greetings,
Peter
the Telerik team