My code so far:
If newpound.Text.Length = 0 Then Else
Dim newpound1 As Integer
Static savedpound1 As Integer
savedpound.Text = newpound.Text
newpound1 = newpound1
savedpound1 = savedpound1
newpound.Clear()
End If
What can I put between Then and Else to ignore Dim newpound>newpound.clear?
If the text box is empty and it moves on to the next one.
I have a table with several columns that allow NULLs. How would I go about writing a SQL Query that will allow me to skip that column in an update if the value is "empty". Should I use a boolean flag letting the query know to update that value? I do something similar in a SELECT like this SELECT * FROM table WHERE (@boolFlag = 1 OR col1 = @col1Val)But trying to do that for an update has proven to be an exercise in futility. Ideally I'd be able to say skip this value if true, otherwise update over my 20ish columns. Right now I can't pass in DBNull.Value, so instead I'm being forced to insert "" which is converted into whitespace (for instance, my nvarchar(50) has 50 spaces).I'm using a SQL Server DB/Table and a DataSet in VB.NET, constructing my queries in VS2k8 if that matters.
View 1 RepliesHow to tell the program that if the field is empty to skip it and go to the next step. I have tried IsEmpty (but it tells me the variable IsEmpty was not declared), I have tried to use different If statements but in most cases I get the message
"Conversion from type 'DBNull' to type 'String' is not valid."
I tried using an integer variable and setting it to
'Test = CStr(dt.Rows(I)("socSecNumber")).Length'.
It works for the first step (which makes sense b/c socSecNumber is never empty), but when I set the 2nd and 3rd ones
(TestFName = CStr(dt.Rows(I)("firstName")).Length TestLName = CStr(dt.Rows(I)("lastName")).Length If TestFName > 0 And TestLName > 0 Then...)
Then I am back to getting the message
'Conversion from type 'DBNull' to type 'String' is not valid'.
I do not know anything about recordset and when I did try to use it it displayed the message something like 'get and set are no longer allowed'.
The entire function is below:
Private Sub BtnCreateLetter_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnCreateLetter.Click
Dim SSN As String = TxtBxSSN.Text
Dim dt As New DataTable()
[Code] .....
Is it possible to include something in the SELECT from table? Such as:
"SELECT * FROM" & Students & "WHERE" * NOT DBNull
or
I do not know if it is possible to use variables in the SELECT from table code but if it is I thought perhaps could make a variable named FieldContents and pass it to a function that would do something like:
"SELECT * FROM" & Students & "WHERE" * FieldContents LIKE '[A-Z]'
I am reading from a textfile. How can I skip a line if it's empty?
Or is it possible to delete at the beginning of ReadAllLines to remove this empy lines.
An empty line would be following:
text1
text2
"empty line"
text3
[Code]....
I have to check the folder path in such a way thatc:Poojadynamic_folderOutput.txtFrom Pooja folder how will I be able to move to the text file since the dynamic folder can be anything and I want to move inside the dynamic folder...
is there any way...
i tried this
Dim path As String
[code].....
I have a textbox that reads like so:
Line 1
Line 2
Line 3
[code]....
How can I use VB to loop through the textbox, deleting Lines 1, 2, and 3, skipping the fourth, and repeat? Or, rather, record every fourth line into a new textarea?
I am developing an app which has a TabControl and Several TabPages. However when I switch the taps to be dislayed on the side I am left with a large amount of empty space. I am unable to move the TabPage to remove the empty space.
View 1 RepliesI am running Visual Basic Express 2008. I realize this forum category is for VB6 or earlier, so please kindly inform me of where to post this if this is incorrect.This is actually the first forum I have joined ever because I can't figure it out on my own and can't find the code off the website. I am almost done, i I have a ComboBox and 4 text boxes. At the bottom it has CLEAR, UNDO CLEAR, COPY ALL TO CLIPBOARD & COPY SOLUTION which does so for the ComboBox and all 4 text boxes. The format like this (CORP is the ComboBox):
CORP - Workstation - Won't power on - HOSTNAME/USERNAME
PROBLEM/REQUEST:
started happening today
[code]....
And then due to the ticket entry system we use, I have a separate COPY SOLUTION button and that works just fine, but that would read as:
Dispatching tech
Now here's where I'm caught up on, I need to take a textbox where I don't use it because I don't have a use for it dependent on the issue of the person I'm working with and it'll look like this:
CORP - Windows - Password Reset - USERNAME
But, this is where I'm getting stuck, it keeps putting stuff like:
CORP - Windows - Password Reset - /USERNAME
or
- Windows - Password Reset - /USERNAME
[code]....
I am building an app. that needs some input from the user, the user will have to move a (selected textbox) by clicking a button. The TextBox will have to move 20 points down or up from corent location by clicking a button.
View 10 RepliesI created a button in my form which is used to add a new textbox.But before that, the button should identify if all the textboxes that have been created are empty.If there is an empty one, it would not add a new one.[code]
View 2 Repliesi have a next button that is enabled only after a textbox is filled its working fine but the problem when a user fills the textbox it will be enabled then clears the textbox it will stay enabled and he can proceed how to stop that ?
View 6 RepliesI'm trying to track down the cause of an annoying interface bug in an app that was ecently upgraded from VS2003 to VS2008 (the bug did not exist pre-migration).What happens is this :1) User clicks in textbox containing a date.2) User clears date3) User tries to move to another field, but can't. No error messages appear - it's as if the validation failed.Further info :1) The textbox's Text property is bound to a dataview which uses a datatable as its source. The bound field is a nullable datetime field with no constraints or default.2) The Validating event fires and the CancelEventArgs property is not set to Cancel. The Validated, LostFocus and Leave events all fire as well, going LostFocus > Leave > Validating3) I can't see any code changes relating to the control or the datasource with a couple of exceptions. The first is that this :
Me.txtRangeEnd.DataBindings.Add(New System.Windows.Forms.Binding("Text", Me.dvClientNos, "RangeEnd"))
has now changed to this :
[code].....
I have a form with a textbox, and i would like validation to occur so that a blank field is not allowed
e.Cancel = String.IsNullOrEmpty(TextBox.Text)
Does not always work, because it still allows me overwrite an existing field with blank spaces, and then update.
So, my application has multiple text boxes for entering different numbers. Only numbers..
One problem I've run into is that I get an error when a textbox is totally empty. If I throw at least a zero in there, it works fine.
How would I make a textbox display "0" when someone deletes everything in the text box? I don't want it to be empty, I just want it to show zero.
I have textbox that is empty and where the cursor is flashing and I wish to move to other textboxes.What happens is that the error message is displayed first and when I press OK, only then can I move to the other textboxes. How do I stop this happening. Am I missing some code.
DesterateDan
Private Sub salesInput_Validating(ByVal sender As Object, ByVal e As System.ComponentModel.CancelEventArgs) Handles salesInput.Validating
[code]....
Ive got a Form application in VB.NET.I have many text boxes on one form (about 20). Is there anyway to check them all at once to see if they are empty instead of writing out a massive line of code to check each one individually such as
If txt1.text = "" Or txt2.text="" Then
msgbox("Please fill in all boxes")
I'm using the following code to set the cursor automatically (important) to the first empty textbox on my form:
Private Sub FirstEmptyBox()
If TextBox1.Text = "" Then
TextBox1.Select()
[code].....
I am using VB.net to create a simple winform. I have the option to save the data I input on that form. I am trying to prevent the user not to save the data if textbox10 is empty. I tried the while loop but I go into an infinite loop. The code is below. The if statement gives the error but allows the user to save.
[Code]...
I started editing an existing code (basicaly to learn vb) without any real previous experience. Well let's get to the point;I have a form that gathers data from db ordering by user ID (on click count).I have one DataGridView with a list of user,some have data in db, some have not. I came so far that if I CLICK on a user that have data, all data is dissplayed in 6 dinamyc textboxes.If user has no data inly first (emty) row with 6 dinamyc textboxes is created.
BUT THE POINT IS (my question to you) - I have a button that simultaneously adds a row of dinamyc textboxes bellow and multiplyies textbox04 (name is clickcount & 4) and textbox05 and displays the result in textbox06.I want to add a messagebox that shows if textbox04 & 05 are empty and in that case exits sub. Here is my code so far:
Private Sub Button1_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'Reset warnings[code].......
Adding a records with ms access.if my form load is empty in my textbox and press ok button will show a message box "Records Failled".I'll try to run it and i got an error "Data type mismatch in criteria expression." [code]
View 10 RepliesHow to Move one Textbox to another Textbox with Enter Key.
View 1 RepliesHow do I fill a textbox with text if it is empty? I am using VB.NET.
View 4 RepliesI have an ASP.Net 2.0 textbox which I need to be validated as having some content, but where whitespace alone is valid input. A required field validator seems to reject a pure whitespace input as invalid. A regular expression validator won't fire at all on empty content. Is there a simpler way round this than using a custom validator control?
View 1 Repliesi have a form with 4 text boxes on them when the user selects add the information from the textboxes saves to my database im just wondering does anyone know how i would make an error message appear if one of the textboxes was blank and stop the new data being saved until all textboxes have data in them?i did write the following peice of code but it did not work Private Sub Button1_Click(ByVal sender As System.Object, ByVal e_
[Code]...
When im using a loop in my program and i'm trying to use an Error Provider to pop up whenever a textbox in my groupbox is empty for some reason I cannot get it to work, can anyone tell me what i'm doing wrong?
For Each ctrl As Control In GroupBox1.Controls
If TypeOf ctrl Is TextBox Then
If CType(ctrl, TextBox).Text = "" Then
[CODE].............
I'm not receiving any type of error, it's just that when a textbox is blank the error provider is not doing anything.
how I can allow the program to exit while the textbox is empty but I can't figure out how it works really..it will not allow me to exit,enter, or tab out of the textbox while its empty.
Private Sub gradeTextBox_KeyPress(sender As Object, e As System.Windows.Forms.KeyPressEventArgs) Handles gradeTextBox.KeyPress
Select Case e.KeyChar
Case "0" To "9", vbBack, vbCr
e.Handled = False
[code]....
I am using VB.net to create a simple winform. I have the option to save the data I input on that form. I am trying to prevent the user not to save the data if textbox10 is empty. I tried the 'while' loop but I go into an infinite loop. The code is below. The 'if' statement gives the error but allows the user to save.
While Len(Me.techniciansTextBox.Text) = 0
MessageBox.Show("Please Enter a Technician To continue")
End While
i have a user name, password and a calendar button which when click, a calendar appear and insert the date selected into the date textbox field, and a submit button. After, i key in value for user name and password and click on the calendar button, the password textbox field because empty. So how can i going to stop the password textbox field to become empty when i click i the calendar button?? i set visible calendar only when click on the button
[Code]...
I'm using visual basic to code a program to help with weights and center of balance on aircrafts, as I'm my unit's new air load planner. The math isn't hard to do, it's just that much of it is trial and error, and redoing all the arithmetic over and over again until the aircraft's C/B is in acceptable limits can eat some time up. So, since i'm trying to learn programming I thought this might be a good way to use it for a real-world scenario.
[Code]...
I have a SelectedIndexChanged function, as shown below;
Code:
Private Sub CmbPayMethod_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CmbPayMethod.SelectedIndexChanged
Call Oracleview()[code].....
What I want to do is that, if the text in textbox TxtOracleNo is the same after IndexChange, i.e., a user changes from BACS to Cheque and vice versa and the Text in TxtOracleNo has not changed meaning it doesn't exit, then a message box is prompted as
Code:
MsgBox ("Enter new Oracle number")
Also, it will be nice if TxtOracleNo textbox will be empty if oracle_no is not present in TblOracleNos. Presently, if it is not available it retains the previous value.