Compare The Date Fields?

May 26, 2010

I have 2 Textboxes with Date/Time in them. I want to test if one is less than the other, here is my current code

DimStartTime1TextBoxAsTextBox=TryCast(FormView1.FindControl("StartTime1TextBox"),TextBox)
DimEndTime1TextBoxAsTextBox=TryCast(FormView1.FindControl("EndTime1TextBox"),TextBox)
IfNot[String].IsNullOrEmpty(StartTime1TextBox.Text)Then

[code]....

However if I enter an Start time of 9:00 AM and an End Time of 5:00 PM this triggers the isvalid=false because 5 is less than 9. Doesn't look like it's comparing the date and time just number.

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Database - Compare Two Fields In An SQL SELECT Statement To Then Select Other Fields Based On This Result?

Apr 8, 2012

I have a table which contains a list of products for a company. They input data about how much stock they have and also the level at which they want to be reminded that they need to order new stock.

[Code]...

I want to list all the true results in a form which the user is then able to navigate through. What would be the best way to go about doing this?

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Mar 3, 2010

I have two textbox in my application.

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Textbox2.Text="Jan 2010"

May I know how can I compare that Textbox1 and Textbox2 text is within same month and same year?

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Jun 16, 2010

I have a connection string set up and a data reader.I have two textboxes on my form for users to type in. One textbox (txtLogin)is a user name and the other textbox is a password (txtPwd). I'm trying to compare what a user types into those two boxes to a table in a vfp database. The table I'm trying to compare to is open about 99% of the time so I need to be able to read from it in some type of "shared" mode.

My Select statement needs to be something similar to "select * from sites where clogin = txtLogin.text and cpassword = txtPwd.text"I just don't know how to get this to work properly.

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Oct 22, 2008

I'm trying to compare the modify date of a file vs the current system date. I've found an MSDN article describing how to get the modify time of a file:

Dim infoReader As System.IO.FileInfo
infoReader = My.Computer.FileSystem.GetFileInfo("C: estfile.txt")
MsgBox("File was last modified on " & infoReader.LastWriteTime)

This gest the Date and Time, but I want just the Date not the time.

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I need to compare the date that is entered with today's date minus some number of work days.

I used dateinterval.day, but that is the actual day, not the work day. i don't see a "simple" way to get work days.

For example, my number is 3, so i want 3 work days (M-F) not 3 days.

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how can I create following thing with Visual basic?I would like my excel to check the date value in a cell and compare it to current date and if the value in the cell is older than 2 months compared to current date it would change the cell's colour.

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Mar 26, 2012

my sql statement is returning null when when I compare date from access database and date entered in textbox in vb. seems to me that the two dates are of different format so null is returned from the select statement but how do I go about this.[code]

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Aug 12, 2011

i have 2 datetimepicker which are startdatedatetimepicker and enddatedatetimepicker.. the start date should not be more than end date..thus i need to check these two date.. here is my code...

[Code]...

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Jul 28, 2009

I have 2 date ranges with 2 text box, based on that m populating reports.

I want to do in such a way if fromdate and todate <27/06/2009 then it should call come other SP otherwise diff one

[Code]....

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Apr 9, 2009

How to compare DateTimePicker1 with DateTimePicker2?For example i wanted DateTimePicker1 must always be smaller than DateTimePicker2...

example
DateTimePicker1 > DateTimePicker2
'display message box error

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Aug 8, 2011

i want to compare two data values in my database.These two dates belong to two different columns.What i want to compare is if the date of one column greater by 6 months from the date of other column then it should give error.I want to pass this query to database and check,and later on depending on the result want to insert my other functionality?

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Feb 21, 2012

I am developing a billing application to help out the billing lady who has been doing our billing by hand. I am essentially done�. Except for one class of customer I can�t wrap my head around. Nuts and Bolts:

1.Data comes from a table that shows Storage id, customer id, Billing Start date, Billing end date.

2.I am kicking the data back out to a table and I�ll build her a nice little crystal she can run.

Problem:We rent storage space. If multiple customers use the same storage then they will split the cost of the daily fee. If there is 3 customers they each pay a third etc. This seems simple but If Customer 1 starts on 1/1/12 and ends 1/10/12 she pays 10 days. If Customer 2 comes in 1/3/12-1/9/12 they will split 7 days. If Customer 3 comes in only on 1/9/12 then they will all pay a third on that day. Now imagine this across 600+ storage units and 1000+ customers and each customer using multiple storage at any given time.

My biggest issue is I don�t know how to express how we do that calculation by hand programmatically. By hand process and how I figure I am eating the elephant: Find every Customer that has used the Space in the billing period -Determine the unique storage numbers that were used during the billing cycle kick the results to a storage table on an access database. I am using a table because I figured it would be less of burden for the application then a list or array.

Determine where there is overlap - Use �FOR� to cycle through the orginal data table using the unigue. Here is where I am stuck. How do I compare the dates in a way to determine which customer is using it when compared to the others. Obviously i can determine the difference in dates between the start and end. It is getting the applicaiton to recognize the dates are with in the other dates. here is kind of what I was thinking obviosly this doesn't work I am just using the format so don't crush me too bad because I code like a caveman.

Dim CustomerDifference as time span
Dim UniqueStorage as Integer
Dim Customer as string

[code]....

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Aug 12, 2009

Compare With Todays Date? [code]....

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My collegeue and I have been searching on the net a hell of a lot for a problem he is facing and we so far have been unable to find a resolution.He has an Access Database where one of the columns is of Date format. This date is in UK style (as defined by the Operatins System)

In his application there is a datetime picker which the user picks from he then wants to select * from the access database where the dates match but because the DateTime Picker is giving a US Format date (i.e MM/dd/yyyy) and in the database its UK (i.e: dd/MM/yyyy) its not finding a match and returning no records.

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Apr 22, 2010

I am using the code shown below to compare two Access databases with two fields each and write the results to a third Access database.I am getting an error at the "Do While DMReader02.Read = True" line: "Invalid attempt to call Read when reader is closed."Why would the reader be closed at this point if I am using different DataReaders in the two loops?

Imports System.Data.OleDb
Partial
Class Form1

[code]....

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Sep 22, 2011

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Jun 5, 2011

i have a table "Contracts", with fields CompanyNumber, MaturityDate and other fields.i have a form in vb.net, with a textbox that should check if the entered company number exist in my db, if it does it should check whether the maturity date is bigger or less than current date.Any one out there that knows how to go about it? Here is the code am trying with;

Private bindingSource1 As New BindingSource()
Private dataAdapter As New OleDbDataAdapter()
Dim connectionString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=mtc.mdb"

[code].....

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Aug 4, 2010

be able to check if an application i am writing has been run on a week by week basis. i have created a button that when pressed creates a text file with nothing in it, i can read back the date it was created which also gives me the time which i dont need, i then need to compare the date the file was created to see if it is older than 6 days if so delete the file. how can i check to see if a creation date is older than six days???

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Jun 22, 2010

i need to get date from database table and compare it either it today or tomoe..after that need to compare time.I got table where the format is 'datetime' contains like = 4/11/2010 12:00:00AM'....so i need to get the date only...how to do that?...when get the date ...ithen i need to compare a time.

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Jun 18, 2009

Is there a way to compare two dates (which include time) ignoring the time? I have a 1/1/2009 8:00am and 1/1/2009 9:00am and I just want to know if it is the same day, without any care to what time it is. I know I can convert the date and compare the strings, but is there another way?

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Mar 6, 2009

I want to compare just the date part (and Not the time) of two VB.NET Date objects.Is there a way to do that?

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Sep 21, 2011

My application is in VS2008 coded in vb.net.I have a table with three columns FromDate,Todate and Schedule.FromDate and ToDate will have date values whereas Schedule will have a any of these values(weekly,Monthly,Yearly) In my Form i have given some provision to the user to check the records.

My requirement is The currentdate that is Today's date should be compared with the values of Fromdate and ToDate.First it should be check whether Schedule value is Weekly or Monthly or Yearly.If it is weekly than it should check the record in between fromDate to ToDate with a increment of one week.That means it should first check the first value of fromDate than add 7 days to the value and then again check from fromDate and this should continue till it reaches Todate.

[Code]...

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How To Compare Two Date Values In Two Different Columns Of A Table

Sep 21, 2011

My application is in VS2008 coded in vb.net.I have a table with three columns.FromDate,Todate and Schedule.FromDate and ToDate will have date values whereas Schedule will have a any of these values(weekly,Monthly,Yearly)

In my Form i have given some provision to the user to check the records.My requirement is The currentdate that is Today's date should be compared with the values of Fromdate and ToDate.First it should be check whether Schedule value is Weekly or Monthly or Yearly.If it is weekly than it should check the record in between fromDate to ToDate with a increment of one week.That means it should first check the first value of fromDate than add 7 days to the value and then again check from fromDate and this should continue till it reaches Todate.

[Code]...

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Jul 30, 2009

Is this the correct way to get a datetime value using a sql datareader:
existingETA = existproformaReader.GetDateTime(0)
I want to assign the value to a date variable and compare it to another date variable.

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Feb 17, 2012

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Feb 2, 2009

how data is stored in a DB vs how it is displayed in a DataGridView, but i cant come up with a solution to my problem ...I have a DGV being filled by a Datatable. I have set the DGV Date column to format as "yyyy-MM-dd" and it shows that accordingly.

DataGridView1.Columns(9).DefaultCellStyle.Format = "yyyy-MM-dd"

I also have a sub that USED to take the DataTable that filled the DGV and used it to generate a CSV file. But since i had modified how the date was displayed in the DGV i decided to change the CSV Export to use the DGV instead of the DataTable.

Dim writer As System.IO.StreamWriter
writer = File.CreateText(PathToSaveFile)
For intRows As Integer = 0 To DGV.Rows.Count - 1

[code]....

My issue is that even though i changed the VIEW in the DGV to show me the date how i want it, the CSV does not take the displayed date when it writes the lines, it seems to still take the DB date, and then displays it as "dd/MM/yyyy". how am i supposed to tell the CSV Sub to change how the date is displayed in this file ?

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Feb 23, 2009

I've got a data entry form with 3 date fields which can be null.When I open up the form the fields display as today's date when the value is null.I want to be able to display to the user that the value is null and not some spurious or misleading value.Any ideas on how I can do this?

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Apr 20, 2012

I have a FormView where I pull data from one table (MS Access), and then insert it (plus more data) into another table. I'm having issues with the dates.The first table has two date fields: date_submitted and date_updated. In some records, date_updated is blank. This causes me to get a data mismatch error when attempting to insert into the second table.It might be because I'm databinding the date_updated field from the first table into a HiddenField on the FormView. It then takes the value from the HiddenField and attempts to insert it into the second table:

Dim hfDateRequestUpdated As HiddenField = FormView1.FindControl("hfDateRequestUpdated")
myDateRequestUpdated = hfDateRequestUpdated.Value
'... It then attempts to insert myDateRequestUpdated into the database.

[code].....

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Dec 8, 2009

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Private Sub Command1_Click()

Dim date1 As Date

Dim label1 As Date[code]...........

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Mar 14, 2011

I have a simple If..Then like so:

If rhcexists.First.SignatureDate > Date.Today.AddMonths(-6) Then
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rhcexists is a simple query to the Entity Model:

[code].....

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Sep 29, 2009

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Apr 22, 2009

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[Code]...

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[code].....

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[Code]....

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I try to make a WFA for filling, reading etc. to a database. I want to compare 2 dates (actually 1 date is changed by 42 days) that are chosen by a user through a datetimepicker. After comparing the 2 dates the "newest" date has to show up in a non editable textbox. This Is my code (of course I have 2 subs for the datetimepickers as well).

Private Sub AwbdatumTextBox_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AwbdatumTextBox.TextChanged
Dim DatumbinnenkomstDateTimePicker As DateTime

[code]....

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Public Module Globaldefinitons
Public a As Short
...
Public zz10 As Double

[Code]...

I need to change the module into a class with non-shared fields. This means, each and every of these thousands of references needs to reference the instance of that class:

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Class Foo
ReadOnly name As String
Public Sub New(name As String, dependentUpon As Foo)
Me.name = name

[code]....

The output of New Bar() is:

Dependent created. Dependent upon nothing.
Independent created. Dependent upon nothing.

It seems fields are initialized in the same order as they appear in the source code, which (a) leads to an unexpected result, and (b) seems a little puzzling, given that one is normally not permitted to read from uninitialized variables in .NET, yet that seems to be working fine above.I would've expected VB.NET to be smart enough to initialize referenced fields first, and only then those that reference it; i.e. I'd have liked to see this output instead:

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