How to ADD days to selected date in asp using ajax calendar extendar?

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How to add or subtract dates in C# using ajax calendar extender?

I have two textboxes in which i have used ajax calendar extender. When I choose a date from one textbox, I want the other one filled with a date calculated from the one selected by adding some days or months. How can i do that?

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Karthik · Answer 1 · 2012-10-22T07:51:25.687

0

try this

DateTime? SelDate = myCalendarExtender.SelectedDate;

if (SelDate != null)
{
    DateTime SelectedDate = SelDate .Value;
}

DateTime Selected_Date= SelectedDate ;

DateTime result= Selected_Date.AddDays(30);

edited Oct 22 '12 at 07:51

answered Oct 22 '12 at 07:21

Karthik

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i dont want to add in todays date. i want to add in date which i have selected in first text box. – Umair Javed Oct 22 '12 at 07:23
pass the date selected as value of SelectedDate...Simple... – Karthik Oct 22 '12 at 07:25
it only adds in system date not in mine date. – Umair Javed Oct 22 '12 at 07:29
please tell me that i am very beggginer cant understand. – Umair Javed Oct 22 '12 at 07:30
have you replaced the DateTime.Now with the selected value from calender control? Show us what you have tried. – Karthik Oct 22 '12 at 07:31
DateTime SelectedDate = DateTime.Now; DateTime result = SelectedDate.AddDays(30); TextBox6.Text = result.ToString(); this is what i have done! – Umair Javed Oct 22 '12 at 07:32
replace the first line with DateTime SelectedDate= calendercontrolname.SelectedDate. i have not tried it just a guess . – Karthik Oct 22 '12 at 07:38
how can i select my date which i have inserted ?? there is no of selectedDate after datetime.. – Umair Javed Oct 22 '12 at 07:40
ERROR! Error 2 Cannot implicitly convert type 'System.DateTime?' to 'System.DateTime'. An explicit conversion exists (are you missing a cast?) – Umair Javed Oct 22 '12 at 07:42
http://stackoverflow.com/questions/1729553/system-datetime-vs-system-datetime – Karthik Oct 22 '12 at 07:43
Umair: You have a `nullable` variable that you are trying to cast to a `System.DateTime`. Cast it to a `System.DateTime` e.g. `(DateTime)calender.SelectedDate;` – Neil Knight Oct 22 '12 at 07:44
1

@UmairJaved try google before you post each error – Karthik Oct 22 '12 at 07:44
again an EXCEPTION raised " Invalid Operation exception was unhandled by user code". – Umair Javed Oct 22 '12 at 07:46
DateTime SelectedDate = (DateTime)CalendarExtender1.SelectedDate; DateTime result = SelectedDate.AddDays(2); TextBox6.Text = result.ToShortDateString(); – Umair Javed Oct 22 '12 at 07:46
Nullable object must have a value.. again this is the reason!! :( – Umair Javed Oct 22 '12 at 07:50

score 0 · Answer 2 · edited Nov 28 '16 at 12:30

I assume you want the date on the second TextBox to change after the user has selected a calendar date on the first TextBox. You need to intercept the OnClientDateSelectionChanged event (on the client) (in javascript) and write a handler (in javascript) that will update the value on the second TextBox from the value selected on the first

Basically given this:

<asp:TextBox ID="tbFirst" runat="server"></asp:TextBox>
<asp:TextBox ID="tbSecond" runat="server"></asp:TextBox>
<cc1:CalendarExtender ID="CalendarExtender7" 
runat="server" OnClientDateSelectionChanged="DateSelected" TargetControlID="tbFirst" />

Then in a javascript block you:

function DateSelected(sender,args)
{
     alert('You have selected : ' + sender._selectedDate);
     //TODO: Select the second box and set it's value to whatever is needed 

}

How to ADD days to selected date in asp using ajax calendar extendar?

2 Answers2