Choose The 'blank' Value, It Will Not Let Me Past That Field
Aug 7, 2009
I have a combo box defined as a drop down list for a numeric field and have possible values under items. One of the values I have is a blank value (at the top of the items list) in case the user needs to leave the value as null. However, when I choose the 'blank' value, it will not let me past that field. I tried changing the 'data source update mode' to 'Never' and it let me past the field but then of course it won't save ANY of the values I choose.Is there any easy way around this without having to change the field to a string? I have several like this.
View 10 Replies
ADVERTISEMENT
Jun 22, 2010
am new to VB.net i know VB
i created a button on the form
private void button1_Click(object sender, EventArgs e)
{
[code].....
View 2 Replies
May 7, 2010
i am using vb.net 2005 and ms access, i have a column called accountnumber in ms access. i want to enter 14 digit number in that column, i am confused to choose which data type, because longint cannot accept more than -2,147,483,648 to 2,147,483,647.
View 6 Replies
Aug 13, 2011
I want to add a blank value to a field in access database with vb 2008 command.
Problem 1: Here is my code, it shows conversion to string not possible errors
Private Sub btnRedThrow_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnRedThrow.Click
Dim dbCnct As New DBUtills
[Code]....
notice the fifth and last value is empty. But it is not being added into the database, how do I do that?
Problem 2: Why does an additional field from my access database disappear even after I manually created the field?? (access database 2003 version, extension is .mdb) I'm using visual studio 2008
View 1 Replies
Oct 27, 2009
Dont know what happened but on every form whichever control is related with an image in the resource is not displaying image. I mean the background image field in every control is blank...
View 1 Replies
Mar 8, 2011
I'm doing a simple calculator program calculating Pennies, Nickels, Dimes and Quarters. I made a Try-Catch statement so that if the user enters letters into the text boxes, they get an error message. However, if the user leaves one field blank, the error message still pops up. What's the code so that I can get Visual Basic to recognize that an empty field is the same as 0 so that that message doesn't pop up? [Code]. What do I need to add to it to get that Error Message to stop showing when the user doesn't enter a value into one of the text boxes?
View 7 Replies
Dec 31, 2009
I'm using the ErrorProvider in VB.Net (2005) which is associated with a BindingSource that is bound to a custom object that I have created. This custom object contains a date field that has a "Date" data type that. I am using a "TextBox" to bind the date field in my form. My issue is, whenever the TextBox loses focus and is blank, "String not recognized as a valid DateTime" is displayed by the ErrorProvider and the focus can't be changed to any other control on the Form. It's good that the ErrorProvider validates entries on Date fields by default (I didn't set up my custom object to display this particular error for the date), but it should allow blank values. I want the user to be able to have a blank date with no error message displayed. How can this be done using a Date field bound to a TextBox?
View 2 Replies
May 30, 2010
I have a field called PODate & TextBox txtPODate.text. It saves/updates fine when the txtPODate is filled. But when the txtPODate is blank, it throws an error. The problem is that I can't enter date for each record unless I got Purchase requisition converted into Purchase Order. Once it is converted to PO, I need to enter the date to update that filed. So, how can I make my program to accept blank date field.
View 6 Replies
Sep 12, 2009
I have a date field bound to a textbox. If I make any changes to the textbox, I get "stuck" in the field unless I put a valid date value. All I want to do is set the date textbox to blank and move on to the next field, but I can't. I am eternally "stuck" in the field unless I put a valid date value.
[url]..
I did several hours of research, but looks like there is really no solution to this problem... Is this true?
View 2 Replies
Jun 20, 2008
Using VB2008, Access
I have 2 fields defined as date/time (short date).
I need to store dates fields which may at times be blank (null), how do I go about that?
I tried using:date.minvalue and that stores the value of 12/30/1899. I would like the field to be blank until the user enters a valid date.
View 10 Replies
May 4, 2009
How can I get this to happen? I googled around and it seems setting the CUSTOM FORMAT to " " when the field is null will work but not for a BOUND datetimepicker.
View 12 Replies
May 18, 2010
i just got it in the internet and edited it..
Dim xlApp As Microsoft.Office.Interop.Excel.Application
Dim xlWorkBook As Microsoft.Office.Interop.Excel.Workbook
Dim xlWorkSheet As Microsoft.Office.Interop.Excel.Worksheet[code]....
what I want to do is have a column name in the excel worksheet which is not included in the code..i'm getting the data from a datagridview but it only shows the data in the excel.. i also want the field name of these data to be shown..another, as you can see in the code given, the directory is fixed.. what do i have to do to choose a directory to save my work? and also, i have many gridviews and whenever i'm exporting my work to the excel worksheet, it always overwrites my work.. i want to choose the directory to save, also show the field names, and make a separate worksheet for every gridview..
View 3 Replies
Dec 20, 2011
I am currently working on a family project which is based on "Who Wants To Be A Millionaire?" show. There is a huge diffrence between the show and my project. My project is a christmas edition and the goal is not to get money or something, since I will not add it... Erhmm... Let me get to the point. I have already designed a layout and scripted some things. I have about thirty questions but I do not want them to always spawn in the same array, if you know what I mean. I want the program to randomly choose one of those thirty questions and NEVER choose the same question in the same program run. By the way, there are four options on my project: A, B, C and D. I have got everything, I just need a code.
View 3 Replies
Jan 6, 2009
I have 2 richtextboxes how can i identify in which richtextbox the data is to be paste /copy /cut
View 5 Replies
Feb 14, 2011
I have an "application" that consists of a form Form1, with the following code behind it:
Public Class Form1
Dim xDown As Integer, yDown As Integer
Dim g As Graphics = Me.CreateGraphics
Dim p As Pen = New Pen(Color.Black, 1)
Dim r As New Rectangle
[Code]...
View 7 Replies
Dec 31, 2011
my Dos Command ..
"""""
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim openFileDialog1 As New OpenFileDialog()
openFileDialog1.Filter = "deb filesFiles|*.deb"
[code].....
when my btn click then "tempfile" copy ok but its delete before my shell command execute....So How I Can Delete "tempfile" After my Shell command ececute...
View 1 Replies
Oct 4, 2009
in my text file i have lines like this
------------------------------------------------------------------------------
AGILENT ICT FIXTURE WIRING REPORT Fri Sep 18 01:53:22 2009
E:/jobs/celestica/i-test/4091760-1003/fixture/wires
------------------------------------------------------------------------------
Fixture Type : Agilent SimPlate Express
[code]....
and output 2 should look like this
0.0 28 Blue (2 02.50 03.0) WX_EN_H 132111 -71225 0 0
View 2 Replies
Sep 1, 2009
How do I make my program know that time is passing and interact with it? Currently I'm trying to use a method like this:
Imports System.Globalization
Private Sub CurrentTime_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CurrentTime.Tick
Dim date_info As DateTimeFormatInfo = _
CultureInfo.CurrentCulture.DateTimeFormat()
ToolStripLabel1.Text = Now.ToString(date_info.ShortTimePattern)
End Sub
That sets the current time to ToolStripLabel1.Text it looks like: 10:25 PM. Then I made another timer, realizing I couldn't interact with Toolstriplabel1.text because the time contains " : and PM", and this timer does this:
Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick
TextBox48.Text = Val(ToolStripLabel1.Text)
End Sub
Basically it takes the value of toolstriplabel1 which would be "10" it gives a variable 1-12 in accordance with the current time. Then I have another timer that handles the main process, and in My.settings I have a variable:
My.settings.12hourspassed
So I was going to use My.settings.12hourspassed as a variable such as My.settings.12hourspassed = My.settings.12hourspassed + 1 - whenever the time (textbox48.text) goes to 12.
Private Sub Timer_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer.Tick
If Val(TextBox48.Text) = 12 Then My.settings.12hourspassed = My.settings.12hourspassed + 1
If Val(TextBox48.Text) = 12 Then TextBox48.Text = "1"
End Sub
The problem is that I cant do textbox48.text = "1" because another timer is making it the value of the current time.. So whenever textbox48.text = 12 it constantly does: My.settings.12hourspassed = My.settings.12hourspassed + 1...
I know that this method completely skips an hour and such.. accuracy isnt all that huge. Any way to tick off whenever 12 hours have passed? and if the program is turned off a way to compare the current date with the date the program turned off at to see how much time has passed while the program is off?
View 14 Replies
Nov 5, 2010
Dim Test_Output As System.Byte = 0
Try
For test_value As System.Byte = 0 To 255
Test_Output = test_value
Next test_value
Catch ex As Exception
MsgBox("Exception occurred: " & vbNewLine & "Test_Output is: " & Test_Output.ToString & vbNewLine & ex.Message)
End Try
View 7 Replies
Feb 2, 2012
I am trying loop though this month until past six months using vb.net and get the the month as integer and year only and pass this to my sql statement. but cannot seem to figure it out..so far i got this :
Dim dtNow As DateTime = DateTime.Now
Dim pastSixMonths As DateTime = dtNow.AddMonths(-6)
For i As Integer = dtNow.Month To pastSixMonths.Month
Next
View 1 Replies
Sep 10, 2009
I tried to accomplish this via a MailMessage.Headers.Set call, in VB.net. See below:
Dim objMail As MailMessage
Dim objSMTPClient As SmtpClient
objMail = New MailMessage()
objSMTPClient = New SmtpClient()
[Code]...
To be clear: I am not doing this with malicious intent. I am working on an e-mail integration component that utilizes both UIDs and a "Last processed" date to locate the first new e-mail to integrate. I want to test cases where multiple e-mails have the exact same date/time - as the e-mail integration module should handle those situations flawlessly. If I could simply fake the date this way, I could send as many e-mails as I wanted that matches a certain date/time, rather than trying to send them with an automated script - hoping they will all be received within the same second.
View 2 Replies
Dec 19, 2009
how to allow copy and past in the grid veiw.
View 4 Replies
Oct 2, 2009
in my text file i have lines like this
------------------------------------------------------------------------------
AGILENT ICT FIXTURE WIRING REPORT Fri Sep 18 01:53:22 2009
E:/jobs/celestica/i-test/4091760-1003/fixture/wires
------------------------------------------------------------------------------
Fixture Type : Agilent SimPlate Express
[Code]...
but this code remove all the heading and writ in another file. I want to keep the oroginal file in original format but without the line which dont follow the pattern.
View 8 Replies
Oct 5, 2011
We have a demo program that was written and compiled in May of 2006, last used successfully during the summer of 2009. This program is stored on the development PC and a laptop, both WinXP PRO.The developement tool was VB 2005 Express Edition.Now we have revisited the demo program since there is a possibility of restarting the project. Today the demo program fails on both machines with the error - Input past end of file.
Unfortunately the original developer is no longer on staff or available to question. This leaves us to wonder if a Windows Update may have broken the once working code. Could this be possible and what update is the culprit?
View 8 Replies
Nov 13, 2009
I am working on tis program that excepts user input and does some mathematical calculations. When the user clicks on the button btnExit, to quit the program, the program saves all the values that were entered and stores them into a text file called values.txt. Then when the user opens the program again, all the values are there. The problem is that when I run the program, sometimes it gives me this error:
EndOfStreamException was unhandled by user code Input Past End of File I don't know what could be the problem. Here is my code to save the values and load the values:Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnExit.Click
[Code]...
When I try to comment them out, the program runs fine and I enter the values in. Then when I quit the program, I uncomment these lines and run the program again. It runs fine.and all the values that were entered before, are there. So I have no idea what could be the problem.
View 4 Replies
Jul 22, 2010
So here is an example of a program im trying to interact with. I read up on sendmessage and findwindow functions but don't understand exactly how to communicate past finding the window
Im trying to click that selected item in that listbox. First i found the main window hwnd and now im trying to figure how to find the information needed to be able and click that selected item in the listbox.
[Code]...
View 1 Replies
Mar 6, 2009
I'm trying to make this program which compares the difference between any date in the past and the system date, showing how many days have elapsed since that date. This is the layout I've created so far, the two date boxes currently show the system date so even if I change the system date, both those boxes will adjust to show it as well. I want to try and make the system date a box without a drop down arrow and so you cannot edit the box at all. The box below is fine how it is as the user can enter any date they desire. And the text box at the bottom needs to show the difference between the system date and the inputted date.
View 9 Replies
Aug 8, 2010
Is it possible to copy a control that is on the form but also runs off th the form because it is bigger than the form and screen? If I have the height and width of an area I want to copy that runs off the form, any way to grab it? The form will not be minimized and will be the focused program. When i click a button I want to do this. Either copy to clipboard or even just save as an image. I can even have the handle to the control if that is needed.
View 1 Replies
Feb 24, 2010
I've got a usercontrol that's a simple rectangle with three labels on it. It's essentially triggered to give a caption to an image when the mouse is moved over it. As I feared, adding the control to the form (or any container on the form) restricts drawing the control to the region defined by the container. I tried increasing the region of the form and the container, but it still didn't draw outside the container.
So my question is: Is there a way to make the control display partially inside the container/form and partially outside it, or is there a better object type that will do what I want?
[cod]e...
View 4 Replies
Jul 29, 2011
I have a form where a user can choose an election date. One of the most frequent errors users make is entering the incorrect due dates of reports. Therefore, I am attempting to generate the report due dates in the application using the report guidelines. For instance, reports are due 32 and 15 days prior to the election and 30 and 60 days after an election.
I know the following won't work but you get the jest of what I am attempting to do. I am assuming I will need to break down the month, day and year somehow before I subtract or add the days to the date to get the actual report date.
[code]...
View 3 Replies
