string was not recognized as a valid datetime in vb.net

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Hi All,

I am creating a webpage to enter a date to sql server 2012.

When I run my application from visual studio, it works fine and saves the datetime.

But when I publish on the same machine the error shows up.

At the time of sql installtion, the machine time was set as english(US). which I have now changed to english(India) for date format: dd-MM-yyyy

Following is the parameter for sql:

daCreate.InsertCommand.Parameters.Add(New SqlParameter("@ROUTTD", DateTime.Parse(txtTargetDate.Text)))

Following is the function used for verifying the date format as I also allow manual date entry in text box. Also, I have used Jquery datetime picker.

VB

Public Function fnDateValidation(ByVal textfordate)
        fnDateValidation = 0

        Dim test As Date
        If Date.TryParseExact(textfordate, "dd-MM-yyyy", _
                              System.Globalization.CultureInfo.CurrentCulture, _
                              Globalization.DateTimeStyles.None, test) Then
            fnDateValidation = 1
            'TODO: ok
        Else
            fnDateValidation = 0
            'TODO: not ok
        End If
        Return fnDateValidation
    End Function

Pls suggest.

Thanks

Posted 17-Sep-14 4:48am

atul sharma 5126

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Comments

Sergey Alexandrovich Kryukov 17-Sep-14 11:21am

First of all, don't use string types, like varchar, to store time. Use time data types, such as DATE...
—SA

Richard MacCutchan 17-Sep-14 11:23am

You have used a pattern format for the call to TryParse but not for Parse; use the same format for both.

2 solutions

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Sheepings · Answer 1 · 2014-09-17T05:19:00

Solution 1

I may stand corrected, but i believe the Date format should actually be yyyy-mm-dd and the database structure set to ' date ' or ' verchar ' should also work. Otherwise you may have issues.

Posted 17-Sep-14 5:19am

Sheepings

Comments

Sergey Alexandrovich Kryukov 17-Sep-14 11:23am

You should not rely on any particular format. OP should 1) use time data types (DATE, for example), not varchar, 2) specify format in a query, if needed.
—SA

[no name] 17-Sep-14 11:32am

It's been a while since I've done anything with dates in SQL, but upon looking this up, you would be correct Sergey.

atul sharma 5126 17-Sep-14 12:28pm

I am using DATETIME format in sql.
I tried changing the format in function to yyyy-MM-dd but that did'nt help.
Should I change the type to DATE instead in sql?

Abdul Samad KP · Answer 2 · 2014-09-20T03:39:00

Solution 2

Use your function to validate the date and change

daCreate.InsertCommand.Parameters.Add(New SqlParameter("@ROUTTD", DateTime.Parse(txtTargetDate.Text)))

To

daCreate.InsertCommand.Parameters.Add("@ROUTTD", SqlDbType.DateTime).Value = DateTime.Parse(txtTargetDate.Text)

Posted 20-Sep-14 3:39am

Abdul Samad KP