dim pvalue as datetime pvalue = (Date.Now.AddHours(3), Date.Now.AddMinutes(2))
above code getting error of ')' expected
No Error MessageBox.show(Date.Now.AddHours(3), Date.Now.AddMinutes(2))
when I create a listview item programmatically and add listitems I get error "The object variable or with block-variable is not set".This occurs only when the listitems are added on another place then where the listview is created.
View 7 RepliesToday I investigated a logical bug in our software and figured out that this is related to the way VB.NET thread variables inside a loop.Let's say I have the following code:
Dim numbers As New List(Of Integer) From {1, 2, 3, 4, 5}
For Each number As Integer In numbers
Dim isEven As Boolean
[code]....
The problem is that isEven is declared but not assigned.In this specific case, it would be correct to write dim isEven as Boolean = false but I haven't done this.In VB.NET, a variable that is declared inside a for loop keeps its value for the next itaration. This is by design: [URL]but this is also dangerous pitfall for programmers.
However, until now, I haven't been aware of this problem/behaviour. Until now.Most of our code base is C# anyway, which doesn't allow the use of an uninitialized variable, so there is no problem. But we have some legacy code that is written in VB.NET that we have to support. So the best thing would be to generate a warning or even an error in this specific case.But even with Option Explicit / Option Strict this does not generate a warning / an error.Is there a way make this a compile time error or maybe a way to check this with FxCop?
been racking my brains on this one for a long time, and I've finally decided to ask the question. I had sevaral fields on a vb.net form which need to come together
[Code]...
I am using a function that is provided by the maker of an IO device that I'm using and the call for this device turns on and off the 16 ports on the IO device by sending the value true or false to the board. The call is as follows:
[Code]...
here's the snippet of my code that im trying to solve since last week...
icePayment.aspx If (Left(Request.Form("return_url"), 7) <> "http://") Then
errorInput = errorInput & "Invalid return URL path! <BR>" errorExist = True
Response.Redirect("InvalidUrlError.aspx")
Else
[Code]...
I am trying to do a really simple function (atleast it was simple in 6.0)... what I want to do is have two forms. One with a textbox, and one with a button and a textbox (we'll call this one form2). When I add a value to form2 and click the button I want the text to appear in form1's textbox.
My code in form2 is...
' on event button1_click...
form1.textbox1.text = me.textbox1.text
("me" being form2)
Anyways, how to pass a value from one form to another.
I am trying to create what I am sure is a simple program to add hours to convert UTC time. I want to type in a UTC time and have it convert for every state in Australia. [Code] Now that works fine however when the conversion goes past "midnight" it then shows the date and time. I have tried about 50 different things but cannot get it to remove the date when the converted time passes midnight. [Code] The string was not recognized as a valid DateTime. There is an unknown word starting at index 18.
View 8 RepliesI am getting the error:"Range variable 'sender' hides a variable in an enclosing block or a range variable previously defined in the query expression."for this
Imports System.Data.SqlClient
Imports System.Linq
Public Class Form1
[code]....
I can select any other item from the table without the error. "sender" has the same properties as "receiver" in the SQL table.
I have a variable that gets a value in a js function. I need to get its value as a double into a vb.net variable. I have tried putting the variable into a label then grabbing it from the label in vb.net as shown in the code below:
[Code]...
Dim SecondName As String = SecondNameTxtBox.text()Is the above statement a correct one?Here I want to assign the value of the text box into tat "SecondName".If it's wrong, please tell me the correct way to write this statement.
View 1 Replieshow to pass value from database to a variable.
This is my query:
Dim it As String = "Mouse"
Dim itNo As String
SELECT * FROM tblITEquipmentName WHERE equipmentName LIKE '" & it & "%'"
I would like to get the ItEquipmentNo and pass it to variable itNo
i have 2 forms -> form 1 and form 2
in form 1 -> 1 button
in form 2 -> 1 textbox and 1 button
when I click button in form 1, it will show the form 2..how can i pass the variable (data from textbox in form 2) into a variable in form 1 after clicking the button in form 2 ?
this is the linkbutton
<asp:LinkButton runat="server" ID="linkId" OnClick="doSomething(10)">ID
</asp:LinkButton>
and this is my sub
[code].....
I know in VBA you could pass an entire form as a varible. Since using global variables are not advised in .net 2008, is there anyway to do this ?
View 9 RepliesNot sure how to do this sub that passes a variable that is used in a Dim.
fill_in_field("main_form.WebBrowser1")
Sub fill_in_field(ByRef WebBrowser As String)
Dim ElementCollection1 As HtmlElementCollection = WebBrowser.Document.GetElementsByTagName("input")
End Sub
Dim ElementCollection1 As HtmlElementCollection = WebBrowser & "Document.GetElementsByTagName("input")"
This is what I would like.
Dim ElementCollection1 As HtmlElementCollection = main_form.WebBrowser1.Document.GetElementsByTagName("input")
is there a way i can do like this in vb.net
[Code]...
what i want is that idx keeps incrementing after each line, without incrementing it on a seperate line.
I want to know if it's possible to retrieve the variables name from when it was passed into a certain function. For example, if I call parseId(myId) to a function with the signature parseId(id), i can obviously retrieve the value of 'id'. However, is there any way I can retrieve 'myId' as a string (without passing it as another value)? Specifically in vb.net, but I'm interested in how it would work in any given language.
View 3 RepliesI have a public variable that I declared in form1 of an application. I am trying to call that variable in form2 and then pass that variable in a sql query. If I declare:
Public Class Form1
Public payPeriodStartDate, payPeriodEndDate As Date
How then to I declare that variable in form2 and how to I pass it to my sql query.
Here is the code I have for form1: [Code]
and when I debug this form, no data will appear. I'm sure that it's something wrong with how I'm either calling the variable in form2 or in the query. Can anyone offer any assistance on this?
I have 2 dropdownlists, one is State and the second is City. I am trying to create it so, when a user clicks the State, the second dropdownlist is populated with City names from a datatable.[code]
View 3 Repliespassing a variable to a sub procedure by reference. Not sure I understand how it works. Here is the code.
Private Sub bntcompute_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles bntcompute.Click
Dim x, y As Double
getnumbers(x, y)
displaysum(x, y)
[code]....
Is the newly modified variable actually being Passed back? and If so where in the statement is it passed back. is it being passed back to the call getnumbers or is it passed back to the statement displaysum?
I'm using MVC2 with jquery.I'm trying to open a partial view in a jquery Dialog container, passing an itemID of an object to be deleted.What I'm doing to accomplish this is passing in an action that renders a view to jquery, which I can get to work without variables.f I try to pass in the ID of the object to be deleted, the action doesn't even trigger.
Here's my jquery code:
$(function () {
var itemToDelete
[code].....
Doing a small project where I would like to be able to print the results of certain calculations. I want to open a new form where the data can be neatly presented and printed. I just can't seem to make the data get passed along to the new form when I open it..
[Code]...
Do you just need to format the date? Such as msgbox(New Date(2010, 1, 1).ToString("yyyy-MM"))
Or do you need a hashtable:
[Code]...
I have a useform set up to have a user input value, and I would like to pass that value to a module. I have made the variable public along with the subroutine that I am trying to use the variable in. I have a message box display the value of the variable in the subroutine and the value is 0, even though I have inputted a value in the userform.
[YearForm]
Option Explicit
Public Sub UserForm_Click()
Me.intYear.Integer = Year
Module1.OpenFile Year
[Code] .....
I have a form with a list box. I'm calling it as a dialog. I can get the result of which button was pressed (OK/Cancel) but how do I get the value chosen from the list?
Dim frmCreateCSVFile As New CreateCSVFile
frmCreateCSVFile.dtpFirstEndDate.Value = dtpFirstEndDate.Value
frmCreateCSVFile.dtpLastEndDate.Value = dtpLastEndDate.Value
[code]......
I'm trying to pass value from form1 to form2, while both form is open.
Using New (Dim frm as new form2) only works when the form2 is not loaded yet. what if both forms already open?
PS: I don't want to use module since there will be a lot variable to pass and i don't want to maintain such large collection of variable in module.
I use VB .NET 2002 (academic version) I have created an MS Access database to be populated with vaules extracted from dBase files. Some numerical values can be null - ie where no data was recorded in the dBase file. Relevant field properties in MS Access mdb table are set to "Not Required" as follows - dt0 is the name in code of the Access table "AllData":
With dt0.Columns
.Append("Date", DataTypeEnum.adDate)
colTest.Name = "Ch1Deg"
[CODE]...
Using an INSERT INTO command I can send a null value to the field:
SQLMdb = "INSERT INTO [AllData]" " ([Date],[Ch1Deg])" & _
" VALUES ('" & dDate1 & "',null)
My problem is how to pass a variable which sometimes takes the value System.DBNull.
If I use SQLMdb = "INSERT INTO [AllData]" " ([Date],[Ch1Deg])" & _
" VALUES ('" & dDate1 & "','" & dDeg & "')
Then when dDeg is numeric then there is no problem and the table is populated. When data is missing and dDeg takes the value System.DBNull then it's a no go! The error message is "Data type mismatch in criteria expression."
Is there a way round this with VB .NET 2002 or do I need to upgrade to a later version which has nullable data types, eg nullable integers and doubles etc?
Is there a way to call or pass a variable to another sub? I'm trying to reterive a variable (or even a field name) in somethign like this:
Private Sub PrintPageHandler(ByVal sender As Object, ByVal args As Printing.PrintPageEventArgs)
args.Graphics.DrawString(RS("field1"), New Font("arial", 8), Brushes.Black, 5, 5)
[Code].....
I am trying to work with classes and variables and don't seem to understand some behavior that is going on.
first off the class
Public Class csSession
Public ID As Integer
Public Name As String
End Class
Usage and behavior (example code)
Dim S1 as new csSession
Dim S2 as new csSession
S1.ID = 1
S1.Name = "1st Session"
S2 = S1
S2.ID = 99
When I assign S2 = S1 all the values of S1 passes to S2 but also there is a "link" or bond between the two variables now. If I change the values of S2 this automatically changes the values of S1!! Why does this happen and how can I prevent it? I just want to pass the variables values contained S1 to S2.