Run Time Error:- String was not recognized as a valid DateTime.

Question

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Hi,
I have the following exception. Please have a look at this.

String was not recognized as a valid DateTime.

VB

[FormatException: String was not recognized as a valid DateTime.]
   booking.btSubmit_Click(Object sender, EventArgs e) in e:\Live Projects\VOGwebsite\booking.aspx.cs:283
   System.Web.UI.WebControls.Button.OnClick(EventArgs e) +111
   System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +110
   System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
   System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
   System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1565

Following is the details of code and store procedure.
C# code:-

SQL

cmd.Connection = con.getCon();
         cmd.CommandType = CommandType.StoredProcedure;
         cmd.CommandText = "sp_InsertBookingInfo";
         cmd.Parameters.Add("@BookingType", SqlDbType.VarChar).Value = bookingtype.ToString();
         cmd.Parameters.Add("@RoomType", SqlDbType.VarChar).Value = drpRoom.SelectedItem.ToString();
         cmd.Parameters.Add("@Package", SqlDbType.VarChar).Value = drpPackage.SelectedItem.ToString();
         cmd.Parameters.Add("@TourType", SqlDbType.VarChar).Value = drpTour.SelectedItem.ToString();
         cmd.Parameters.Add("@SubTourType", SqlDbType.VarChar).Value = drpSubTour.SelectedItem.ToString();
         cmd.Parameters.Add("@ArivalDate", SqlDbType.DateTime).Value = Convert.ToDateTime( txtArival.Text);
         cmd.Parameters.Add("@CheckIn", SqlDbType.DateTime).Value = Convert.ToDateTime( txtCheckIn.Text);
         cmd.Parameters.Add("@CheckOut", SqlDbType.DateTime).Value =Convert.ToDateTime(  txtCheckOut.Text);
         cmd.Parameters.Add("@AdultCount", SqlDbType.Int).Value = drpAdult.SelectedValue.ToString();
         cmd.Parameters.Add("@ChildCount", SqlDbType.Int).Value = drpChild.SelectedValue.ToString();
         cmd.Parameters.Add("@StayPeriod", SqlDbType.VarChar).Value = txtStay.Text;
         cmd.Parameters.Add("@PaymentMode", SqlDbType.VarChar).Value = drpPayment.SelectedValue.ToString();
         cmd.Parameters.Add("@BookingComments", SqlDbType.VarChar).Value = txtQuery.Text;
         cmd.Parameters.Add("@BookingId", SqlDbType.Int).Direction = ParameterDirection.Output;
         cmd.ExecuteNonQuery();
         bookingid = Convert.ToInt32(cmd.Parameters["@BookingId"].Value.ToString());
         //bookingid = Convert.ToInt32(cmd.ExecuteScalar().ToString());

The Store Procedure is as follows:-

ALTER PROCEDURE [dbo].[sp_InsertBookingInfo]

@BookingType varchar(50),
@RoomType varchar(50)=null,
@Package varchar(50)=null,
@TourType varchar(50)=null,
@SubTourType varchar(50)=null,
@ArivalDate datetime=null,
@CheckIn datetime=null,
@CheckOut datetime=null,
@AdultCount int=null,
@ChildCount int=null,
@StayPeriod varchar(50)=null,
@PaymentMode varchar(50)=null,
@BookingComments varchar(MAX),
@BookingId int output

AS

BEGIN

SET NOCOUNT ON;
Insert into BookingInfo(BookingType, RoomType,Package, TourType, SubTourType, ArivalDate, CheckIn, CheckOut,AdultCount, ChildCount, StayPeriod, PaymentMode, BookingComments)
values(@BookingType, @RoomType,@Package, @TourType, @SubTourType, @ArivalDate, @CheckIn, @CheckOut, @AdultCount, @ChildCount, @StayPeriod, @PaymentMode, @BookingComments)
set @BookingId= SCOPE_IDENTITY();
END

i don't able to find the exception because their is no error in data mismatch.
so where is the problem i am understand.
Please help me
Thanks.
Balwant.

Posted 17-Apr-11 7:04am

Balwant.mnd

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Comments

Sergey Alexandrovich Kryukov 17-Apr-11 13:18pm

OK, and where is that line 283? It's good you provided exception stack, but what's the use? You should show a relevant piece of code and the data in the offending call, in this case this should be a sting to be parsed as DateTime.
--SA

3 solutions

Solution 2

Hi,

I think this is due to store procedure return the bookingId as output parameter. while i am using ExecuteNonQuery(); which is only used when we just insert data.

Please have a look at this point.

If their is any other way ot insert data. Please specified.

Thanks,

Balwant

Posted 18-Apr-11 18:23pm

Balwant.mnd

Solution 3

MIDL

//Set default value for output parameter
command.Parameters.Add("@BookingId",  SqlDbType.Int, 4).Value = 0
cmd.Parameters.Add("@BookingId", SqlDbType.Int).Direction = ParameterDirection.Output;

Posted 18-Apr-11 19:22pm

DipaliKolhe

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Abhinav S · Accepted Answer · 2011-04-17T07:18:00

Solution 1

MIDL

cmd.Parameters.Add("@CheckIn", SqlDbType.DateTime).Value = Convert.ToDateTime( txtCheckIn.Text);
cmd.Parameters.Add("@CheckOut", SqlDbType.DateTime).Value =Convert.ToDateTime(  txtCheckOut.Text);

Try debugging your source code. The error is probably occuring in one of the lines above.
The textbox contains a string that cannot be converted to a date time field. Hence this error.

Try using DateTime.TryParse(). That will avoid such errors in the future.

Posted 17-Apr-11 7:18am

Abhinav S

Comments

Pong D. Panda 17-Apr-11 21:18pm

Nice spot!

Abhinav S 18-Apr-11 4:24am

Thanks

Balwant.mnd 17-Apr-11 23:42pm

Hi, no error is not due to this because i had added this instead of txt.CheckIn.Text.
So i am unable to figure out this problem......

Balwant.mnd 18-Apr-11 12:52pm

DateTime.TryParser() does not work...........

Abhinav S 19-Apr-11 2:01am

DateTime.TryParse() not Parser(). :)

Prasanta_Prince 19-Apr-11 1:59am

Good answer.