String Was Not Recognized As Valid DateTime

Mar 29, 2009

I am trying to write a bit of logic that compares a data against todays date in the row datarowbound event of a gridview. I think I am converting the row data item to datatype datetime but visual studio is telling me that I am not!

Protected Sub GvAdDetails_RowDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.GridViewRowEventArgs) Handles GvAdDetails.RowDataBound
If e.Row.RowType = DataControlRowType.DataRow Then
If DataBinder.Eval(e.Row.DataItem, "dateLimit").ToString <> "NULL" Then
Dim dateLimit As Date
[Code] .....

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String Was Not Recognized As A Valid DateTime

Aug 4, 2011

I am trying to parse a date to a datetime picker but this error keeps on appearing "String was not recognized as a valid DateTime" The reason behind this is because the date format of the computer is "MM/dd/yyyy" whereas the date am passing is in this format "dd/MM/yyyy" Here is how I tried resolving the problem:

DTDateReceived.Value = Date.Parse(ListView1.Items.Item(ListView1.FocusedItem.Index).SubItems(7).Text)

The aforementioned error occurs

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String Was Not Recognized As A Valid DateTime?

Jun 1, 2011

working with dates is driving me mad I have the following function to parse al datetime strings in my project:

Public Shared Function ToDate(ByVal obj As Object) As DateTime?
If obj = String.Empty OrElse obj Is DBNull.Value Then Return Nothing
Return DateTime.Parse(obj.ToString)
End Function

Most of my date strings on my pc are "yyyy/MM/dd" and it parses fine. However on the server the dates are "dd/MM/yyyy".I tried this but it made no difference:

Public Shared Function ToDate(ByVal obj As Object) As DateTime?
If obj = String.Empty OrElse obj Is DBNull.Value Then Return Nothing
Return DateTime.Parse(obj.ToString, System.Threading.Thread.CurrentThread.CurrentCulture.DateTimeFormat)
End Function

on my pc if I assign DateTime.Now to a textbox I get 2011/05/31 08:02:00 AM for example. On the server I have my project the date displays as 31/05/2011 08:02:00 AM. Now I use objectdatasources to save the values to my database. Yesterday I was getting this error:Cannot convert value of parameter '' from 'System.String' to 'System.DateTime'until I formatted the date value like so:

Me.odsRates.InsertParameters.Add("CreatedDate", rt.CreatedDate.ToString("yyyy/MM/dd hh:mm:ss"))

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Error - String Was Not Recognized As A Valid DateTime

May 25, 2011

We have data feed, a file with index values and dates (like the S&P 500, for instance). The dates are represented as YYYYMMDD. The Date.Parse() method doesn't understand this format, of course.I wrote a simple static method on a class to parse this, not a big deal, but it irritates the engineer in me that I can't figure out how to get the IFormatProvider functionality to work. All the examples deal with the FORMATTING step, not the PARSING step.So basically, I want to be able to say:

Dim d as DateTime = Date.Parse("20110522", New CustomFormatter())

and get the correct date value out of the Parse method.

Having implemented the IFormatProvider method on CustomFormatter, the GetFormat() method gets called with a System.Type of DateTimeFormatInfo, but I honestly have no idea what to do from there since all the example deal with formatting, not parsing. It doesn't matter if I return an object (self) or null I simply get "String was not recognized as a valid DateTime."

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VS 2008 String Not Recognized As A Valid Datetime?

Jun 29, 2011

I'm creating an XML file from values contained in a datatable. When I try to write an XML date value, I receive "String not recognized as a valid datetime. The dates that are stored in the datatable column is in this format "yyyymmdd". I tried to use XmlConvert.ToDateTime but I get a warning about the method being obsolete and I'm not sure what serialization mode I should use. How would I format the date from the datatable to MM/dd/yyyy and write to an XML file?

XmlWriter.WriteElementString("Add date", XmlConvert.ToDateTime(dr("Date_Added").ToString.Trim)))

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VS 2010 - String Not Recognized As Valid DateTime

Jun 30, 2011

I am having a major issue understanding why this code runs fine once and then when run a second time causes the "String was not recognized as a valid DateTime." exception. This program loops through folders and subdirectorys and retrieves the file dates from the last modified date of the file , Its only when i click New Report to reset all the values in the settings which clears all object lists and resets all the other values that this issue occurs.

This is the value being passed to this function:
#6/14/2011 4:46:51 PM# (The file inside the subdirectory,s last modified date.)

The function is
Public Sub setFileDate(ByVal fileDate As DateTime)
'Format the datetime from the filedate to a UK culture.
Dim myDateTime As DateTime = DateTime.Parse(fileDate, ukCulture.DateTimeFormat)
'Set the current files date.
dFileDate = myDateTime.Date
[Code] .....

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Error: "The String Was Not Recognized As A Valid DateTime

Mar 10, 2009

I want to convert mm/dd/yyyy to dd/mm/yyyy.My application is asp.NET with VB.I tried following code DateTime.Parse(oldDate.ToString("ddmmyyyy"))

But got the error: "The string was not recognized as a valid dateTime. There is an unknown word starting at index 2"

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Regions / Locales - String Not Recognized As Valid DateTime

Feb 5, 2012

I've been having several problems lately with clients that are using a different Windows Region setting than I am. The error is as follows:
The type initializer for 'InventoryDataTable' threw an exception. ---> System.TypeInitializationException: The type initializer for 'InventoryDataTable' threw an exception. ---> System.FormatException: String was not recognized as a valid DateTime.

The error occurs when users load the application and their region settings do not match my own. The application loads up a dataset and attempts to receive a small amount of data before allowing the user to log in. When this is removed, the problem occurs immediately after the user logs in to the app. I cannot seem to find the proper settings to force the user to use either my Region, or to allow the application to figure it out on it's own...

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String Was Not Recognized As A Valid Boolean?

Mar 3, 2009

Dim today As System.DateTime
today = System.DateTime.Now
Dim strDate As String = today.ToString("d")

[Code].....

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Convert A String To A Valid DateTime?

Jan 23, 2012

Need to convert this string:

Mon Oct 31 16:18:15 CDT 2011

Into a valid DateTime value.Have tried every variation of the date time styles with DateTime.Parseto no avail.

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VS 2008 - Format / Year And DateTime Function Not Recognized

Dec 3, 2009

I recently moved a webservice VB.net project from VS 2005 to VS 2008 and now a conversion I use to create a unique receipt number is no longer working.

The Format() function which is supposedly a Visual basic function gives the error:
'Format' is a type and cannot be used as an expression.

The Year() Function which is also a VB function gives the error:
Name 'Year' is not declared.

The Datetime() Function which is also a VB function gives the error:
'DateTime' is a type and cannot be used as an expression.

The actual code statement remains unchanged between the two web services but VS2005 compiles and VS2008 does not.
Dim julda As Long = CLng(Format(Year(oneRowDon.Item(8)), "0000") _
+ Format(DateTime("d", CDate("01/01/" _
+ Format(Year(oneRowDon.Item(8)), "0000")), oneRowDon.Item(8)) _
+ 1, "000"))

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Convert String To Datetime & Calculate The Datetime?

Mar 23, 2011

how to convert string to datetime and calculate date

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Regex - How To Check If The Input String Is A Valid VB String

Mar 15, 2009

We know that VB string start and end with double quotes " "

So we have to use "" if we want " in VB string.

I wonder if there is a regular expression pattern which will match VB string?.

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Asp.net - How To Convert String To Datetime

Jul 30, 2009

I have a Session variable in which i have stored one date '22/7/2009'.Now i want to convert value in session to datetime. I tried folowing code:

Session("AppointmentDate") = Request.QueryString("ADate")
Dim s as datetime=Convert.ToDateTime(Session("AppointmentDate"))

But error is showing as 'string is not recognized as a valid datetime'. convert value in Session to date?

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Convert Datetime Value To String?

Jul 16, 2010

am making a project were the user can put a specific time in a textbox. the program needs to check the system time and the time in the textboxif they are the same there needs to start an action.

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Convert String To Datetime?

Mar 10, 2010

I need to convert a text "WER20903.10" to a date

Dim Filename As String
Filename = "WER20903.10"
Filename = Filename.Substring(4, 7)
Dim dt As Date
dt = CDate(Format(Filename, "ddMMyy"))

Im getting the error: Conversion from string "ddMMyy" to type 'Date' is not valid.

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Converting String Into DateTime Value?

Jun 9, 2011

I have the following string:
20111209
How do I turn this into a DateTime Value? I've tried Convert.ToDateTime(s) normally but it keeps yelling that I'm doing things wrong because the string doesn't look like a datetime value.

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DateTime Conversion From String?

Jun 18, 2012

I am getting this datetime format in an xml file:

2012-06-14T11:15:41.587-07:00
2012-06-14T10:49:32.397-07:00
2012-06-11T11:10:49.2-07:00

I believe I understand some of it, please correct me if I am wrong:

2012-06-14 = date

T = time identifier

10:49:32.397 = hour min second milliseconds

-07:00 = I have no idea

I need to convert this to something I can sort on for my datagrid view.

When I try something like this:

Console.WriteLine(String.Format("{0:d/M/yyyy HH:mm:ss}", "2012-06-14T10:49:32.397-07:00"))

I'm getting the original string back out with no conversion.

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DateTime To String Bad Conversion?

Nov 22, 2010

I'm pulling a saved DateTime using

Dim testDate As DateTime
testDate = rsQuery.Fields("ScenarioDate").Value

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From String To Correct DateTime?

Aug 7, 2009

So, I'm trying to do this...DatumRodjenja_db = DatumRodjenja.Substring(6, 4) & "-" & DatumRodjenja.Substring(3, 2) & "-" & DatumRodjenja.Substring(0, 2)Where DatumRodjenja_db is DateTime variable, and DatumRodjenja is String. And even after that, I'm still getting DatumRodjenja_db in this format "DD.MM.YYYY."

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How To Convert String Into Datetime

Sep 27, 2011

Using VB.Net

When i click the gridview column, that selected column items should appear in the datetime picker

GridView Column value is string, datetime picker datatype is datetime

Code

Private Sub gridview1_CellContentDoubleClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles gridview1.CellContentDoubleClick
Dim i As Integer

[Code]....

When i clicked the gridview column, it is showing error as "Conversion from string "25/09/2011" to type 'Date' is not valid"

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How To Convert This String Into Datetime

Jan 17, 2011

looking to convert this string into datetime20101119T162837And then also how to compare this string to current time so I can say, i.e:

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Sql Convert String To Datetime?

Aug 3, 2009

I have the following sql select statement in my code:

Code:

sql = "SELECT * "
sql &= "FROM Trn_DC_All "
sql &= " WHERE (Content LIKE '% PAGE%') AND Convert(datetime,Substring(Right(Trn_DC_All.Content,21),2,10),7) >= " &

[code]....

Basically, for the substring in the select satement,the datatype is string. By the way, the strFromDate and strToDate datatype are string also.Actually I would like to select the data from database whereby the Substring(Right(Trn_DC_All.Content,21),2,10) is larger than strFromDate but smaller than strToDate.The dataformat in the database is "Feb 01,09" and the strFromDate,strToDate format is "20/07/2009".What should I change in my select statement so that it can retrieve the data?

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.net - Convert String To Datetime Format

Apr 21, 2010

Need to convert a string to normal datetime format so it can be correctly inserted onto a datetime type field. String Format: 4/21/2010 4:43:03 PM Example: 2010-04-21 16:43:03.000 I have clarified question: The need is to change format and not type.

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Converting A String Value To Datetime Datatyp?

Nov 17, 2009

i am developing an application in Vb.Net VS 2005 which accepts an XML and convert its node values in desired data type and assigne them to their corresponding variables. Here i am encountering an exception in converting a string value to datetime datatype:I have a form on which a button is there. On its click event following code get executed: Its code is as under:

Private
Sub
Button1_Click(ByVal
sender As

[code]....

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Converting Datetime From Character String

Mar 5, 2010

I am creating a asp.net web page. i have 2 textbox's that I am adding together to give me 1 value. the 1st textbox is using an ajax calendar extendar for the calendar date in MMDDYYYY format and the second textbox is using a HHmmsss format. So if I'm correct both should be in datetime format. Perhaps I'm wrong on the second textbox. I am still realatively new to vb.net so bare with me. How do I correct or make sure that my formats are correct. Or what code do I need to change to make sure that it is in the correct format. The SQL table field is in DateTime format.

[code...]

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Converting String To Proper Datetime Value?

Jun 15, 2009

I have a datareader reading Date feild from the CSV file as string. it retreives the first record as "03/06/2009" successfully. My system datetime format is dd/MM/yyyy when I insert these values to an access table it put 06/03/2009 i.e makes it 6th March 2009 instead of 3rd June 2009 and so on for the values upto 12th June....after that it starts treating the date monthly correctly..

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Datetime - Convert String To Date?

Aug 31, 2010

how do i convert the string

30.10.2009 in date?
(dd.mm.yyyy)

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DateTime Format String Pattern

Jul 28, 2011

Could someone please guide me on the correct format string to display a time in the following format? [code] Is there one format string I can use to accomplish this?

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Error While Converting String To Datetime?

Jun 29, 2009

i have a textbix in which the user is restricted to enter date in the following format "dd/mm/yyyy" .

then in code behind I am calling a stored procedure to which i am passing this date as a datetime parameter but i get an error

objCmd.Parameters.Add("@DateOfApplication", SqlDbType.DateTime).Value = Convert.ToDateTime(txtDateOfApplication.Text.Trim)

how I might cast convert this string date into datetime to pass to my stored proc

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