Storing String Item In A Date / Time DataColumn Of A DataTable
May 27, 2009
I have a datatable which loads data from an Excel Spreadsheet. One of the columns in the Excel SpreadSheet was of type "Date/Time" in which date values are stored. Now I appended the datatable with three new rows and I wanted to store string values in these rows using the code below. However due to the fact that one of the columns are date/time type, an error is generated as date/time column does not accept string value. I have two questions
a. Is it possible to store string value in date/time DataColumn?
b. Is there a remedy to this situation? [code]
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Aug 11, 2011
Im trying to write a current date and time stamp to mysql with the following code
[Code]...
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Apr 8, 2010
Title pretty much says it all. How do I format the date of a dateandtimepicker to insert it into the SQL date datatype?
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Jan 23, 2012
I am located in the NorthEast US. My problem is properly storing a string in European date format (today is 23/1/2012).
For example the string '12/1/2012' is stored as as December 1, 2012 not January 12, 2012.
How can I dimension a DateTime variable to store the European date string properly?
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Nov 22, 2010
How do I go about adding a ButtonColumn to a DataTable.
I am basically using a DataTable as the DataSource of a DataGrid and need to add a ButtonColumn to the DataTable so that when I DataBind it to the DataGrid it all works.
Although when I try
dt.Columns.Add(buttonColumn)
This is not allowed. It has to be a basic DataColumn.
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Jun 16, 2010
I'm adding a DateTime DataColumn to a DataTable like this:
Dim colDate As DataColumn = New DataColumn("Date")
colDate.DataType = System.Type.GetType("System.DateTime")
dt.Columns.Add(colDate)
Then when I try to add it to my datatable, if the value is Nothing I get an error saying string was not recognized as a valid DateTime. I'm having trouble getting this to work.
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May 21, 2009
Can anyone demonstrate with an example how to shift the position of a datacolumn in a specific position after it is added at the end of a datatable.For example lets say I have a datatable with 9 columns and 5 rows. Now I added a 10th column. However I need this new column as the 5th column which requires shifting. How do I perform this shifting?
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Jan 14, 2010
I am currently working with a datatable and I want to be able to show richtext in a column of the table. First question can this be done? I can force the column to be Type Of richtext box. However, when I try to view/display the table, I get something like..."System.Windows.Forms.RichTextbox, Text: Text That I have added" in the column.
Is there a way that I can get it to show the rich text in a cell of a datacolumn of a datatable?
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Jan 17, 2011
I defined a DateTime datacolumn in a datatable dt as [code]]....
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Apr 24, 2009
i have a datetime field and i want to query it, how to i convert textbox strings to datetime?
Expecting that the user will enter something like dd-mm-yyyy
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Jun 17, 2011
[Code]...
I am trying to convert a string in the format "20110617111051" to date time. Currently I am using String.SubString() function to extract year, month, day, time to format a standard string and then using Convert.ToDateTime(string). Is there any other simple way to do this?
[Code]...
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Mar 12, 2009
i have a project that using vb2008 to do a room reservation .here is my problems...i am using datetimepicker to get the date only.for time,i using 2 combo box. first combo box i put o 1-12 inside and Am/pM for another combo boxand i make the date that is get by the combobox as1) a table called bookings,inside bookings there are fields called userid,bookingid,startime,endtime,startdate,enddate)for (startime,endtime,startdate,enddate)field i`m using textSo now,i want to make a search on the (startime,endtime,startdate,enddate) field,from the datetimepicker,and that i enter to gain the empty room that available to book?
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Aug 30, 2011
i have a problem with my Date/Time. i user comboboxes for the date.when i save the data there's a mesage show like this: This is my code for the date:
[Code]...
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Aug 26, 2011
I have an Outlook.AppointmentItem property string which is a concatenation of dd/mm/yyyy and HH:MM:
.Start = Nz(Me.eventstart, "") & " " & Nz(Me.time, "")
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Aug 13, 2010
in my datatable I've a String.Byte[] column which contains the array of bytes of an image. So, when the datatable is binded to the datagrid, I can see the picture, if present, and the red cross if is not presente. So I can remove the red cross, by assign a value to the DefaultValue property of the datacolumn. But what default value I've to assign?? I tried with system.dbnull.value but the red cross is still present.
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Feb 28, 2011
I want my string s = "110218055515" converted into the datetime format as dd/mm/yy hh:mm:ss.
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Feb 27, 2012
I have a string variable that contains "19:39:43", I would like to convert that to a date object. When I try I get a formatexception was unhandled error during debugging. I want to convert it to format of hours:minutes:seconds but cannot see how this can be done..
Code snippet:
Dim strtxt As String = "19:39:43"
Dim Datevar As Date = Date.ParseExact(strtxt, "HH:mm:ss tt", Globalization.CultureInfo.CurrentCulture)
I tried just "HH:mm:ss" but not sure if that worked...
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Nov 30, 2009
How can I best convert date and time string with format like:
"11/25/2009 6:30 AM" to "20091125_063000AM" ?
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Jan 30, 2012
could anybody point me in the right direction in regards to the following problem? I have some data that has time and date in form of ordinary string. The format is always the same, for instance:
[Code]...
How can I convert it to time understood by computer and check if given time is in the past of in the future in comparsion to current time on my computer? I would also like to be able to tell how much difference there is between the time from my data file and the current time. For instance to say "this time was 3 hours and 20 mintues ago".
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Jul 16, 2010
Thought I'd see if Stack overflow is quicker than me testing something while I get a thousand interruptions from other work :)
I'm updating an old VB net application and trying to refactor some of the logic as I go. The app looks for data from a single date across a few tables and writes that view to a file.
Writing the query in SQL I'd get the equivalent of
SELECT * FROM table
WHERE CAST(FLOOR(CAST(table.date AS float))AS datetime) = '15-Jul-2010'
Ideally I'd use
SELECT * FROM table WHERE date=@input
and add a date object as a parameter to a System.Data.SqlClient.SqlCommand instance
Are those two comparable? Will I get the results I expect?
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Jan 12, 2010
I am using VB 2008 and want to record a start date and time and then the stop date and time in a rich text box, i can get the start time into the box but so far can only stop the time instead of 2 seperate times, what i have is a drop down box with a list of computers 1-10 i was trying to get it so you picked a certain computer and that went into the text box then you started the timer and that was recorded, finally you stopped the timer and that was recorded but as i am a total newbie it does not work
Here is the code i have.
Public Class Form1
Dim time2 As Date
[CODE]...................
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Aug 10, 2009
when running my program I get the following error:Conversion failed when converting date and/or time from character string. After playing a round with breakpoints I discovered the error to appear during:
sqlText = "INSERT INTO dbo.OrderDetails (OrderID, ProductID, Qty) VALUES ('" & _
orderID & "','" & prodID & "','" & prodqty & "')"
ExecuteSQL(sqlText)
[code].....
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Apr 21, 2010
This seems so simple, but I can't get the answer. I need to get the current time in an hh:mm:ss or sss military format. By military format, I mean that if it is past noon, the hour is the PM time plus 12 (1 PM is 13, 5 PM is 17). I found this bit of code:
[Code]...
It returns the hour in AM/PM format. That is, if it is 4 PM, it returns 04 rather than 16). I can't find documentation on the hh:mm:ss mask. In fact I can't find a simple discussion on how to make the time of day property return time in various formats. After 3 hours of futzing around,
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Aug 18, 2010
i'm having a problem how to code to save the value of my dtpicker as string not in date/time value. i formatted my dtpicker as mm/dd/yyyy. i want it to save in my database as string format. my datafield in my database is in text format not date/time. is it possible to save the value of dtpicker as string format?
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Jun 17, 2011
This code blow give me this error:
Conversion failed when converting date and/or time from character string.
Code
sqlstr = "select excute_main.*,cycle_main.cust_id,customers.name2 from excute_main,customers,cycle_main where date2 between '" & Format(MaskedTextBox1.Text, "MM-dd-yyyy") & "' and '" & Format(MaskedTextBox2.Text, "MM-dd-yyyy") & "' and excute_main.main_id=cycle_main.id and cycle_main.cust_id=customers.id"
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Sep 28, 2011
When using INSERT INTO statement to SQL 2008 R2 to a column with data type as date and the data I am taking from a DateTimePicker control with date format as short. When my system date format short set to dd/MMM/yyyy the INSERT INTO statement is working perfectly but when the system date format short set to dd/MM/yyyy I am getting the above error.I tried by changing the control format to custom and dd/MMM/yyyy but still the same error is coming.I am using VB2010 and SQLExpress 2008 R2 SP1?
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Jan 1, 2011
cmd.CommandText = "INSERT INTO Dropping (form_num, filing_date, approval_date, status) VALUES ('" + fnum + "', '" + deyt + "', '" + nulll + "', '" + stat + "')"
here is an sql query statement i run in vb.net. i keep getting the error of "Conversion failed when converting date and/or time from character string." whenever i try to execute this. the datatype of filing_date and approvale_date is "text" but the deyt variable is originally Date, converted to string: (Date.Today).ToString, like so. nulll is simply a variable with vbNullChar as its value.
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Jun 30, 2011
I used to query:
Dim a As String
a = "INSERT INTO tblVisitor(Name, Sex, TimeIn, EnterDate)
VALUES('"& txtName.Text &"', '"& cboSex.Text &"', '"& Now() &"', '"& DateTime.Parse(cboEnterDate.Text) &"')"
[code]....
Which cboEnterDate is my DateTime Picker. Then I got the message:Conversion failed when converting date time from character string.
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Aug 9, 2011
I have a application which gets info from an external feed where dates are in the format ddMMM. I'm trying to turn them into full date format so I was using DateTime.ParseExact. Which was correctly working out whether it should be 2011 or 2012 . But it is erroring when trying to parse 29FEB (which should be 29 Feb 2012. I can guess why its erroring. But if that correct behaviour is this documented and is there a better alternative? [code]
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Apr 6, 2012
I am have an issue with my between sql string. After testing this i have figured out the problem but don't know how to fix this. When i select two dates i want to get the records between(from two date time pickers) the sql string is taking the day as the month so if i: Input 7/10/2011 the sql between string reads it as 10/7/2011
This is my function :
Function ShowTableBetweenSetDates() As DataSet
Dim ds As New DataSet()
Try
[CODE]...
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