Im trying to save a structure that consists of regular variables, some of my own structures and rectangles. Now while all the other data types get saved/loaded nicely the rect information is lost, why is that?
save sub:
Dim ForSaving As SaveDat
Dim file_num As Integer = FreeFile()
ForSaving.OVIRect = ESpec.OVIRect
[code]....
how to make a new structure somewhat, but what I need to know is how I can do something like, GetItemByName without having to do a loop when I have a list of my structure type. What I mean by this is if I had a structure like this:
[Code]...
I have a User defined table type(UDTT) in Sql 2008 I am writing VB Code to send data to Stored procedure that uses it as a parameter I have found that the datatable i build in VB has have columns in same order as udtt when passing it to SQl from VB Currently I have this roughly
In SQL Server
Create type table my_table
Field1 varchar(10)
Field2 varchar(10)
[Code]....
I'm having a problem that's driving me crazy; I can't understand how to convert the XML structure into a class structure (that I want to use to hydrate a XML document).
The XML document looks like this:
xml
<?xml version="1.0" encoding="utf-8"?>
<artists xmlns:opensearch="http://a9.com/-/spec/opensearch/1.1/" xmlns="http://www.spotify.com/ns/music/1">
[code]....
[code]i need to save this info to a xml file to view it later.i can have from 1 to 50 pieces..
View 3 RepliesIs the integer data type is structure? And if yes what is the original code of it?
View 2 RepliesI have create a structure type array. sort the array so i can display the sorted array in a listbox. I want to be able to either sort by last name or the student with the highest score. Here's what I have so far:
Structure student
Dim firstName As String
Dim lastName As String
[Code]....
I heard about the IComparer thing but I didn't know how to implement it into my project.
i've got a little problem with List(on T) variables.
[code]...
It works perfectly fine. Does anyone know what the problem is?
I epochly failed creating an array structure. How would I build it like I tried to do with values for each data type.
Structure PovertyGuidelines
Dim Id As Decimal
Dim NumberOfPersons As Decimal
Dim AnnualIncome As Decimal
End Structure
Private Data(20) As PovertyGuidelines
Private Id(,) As Decimal = {{1D, 2D, 3D}}
Private NumberOfPersons(,) As Decimal = {{6D, 9D, 7D}}
Private AnnualIncome(,) As Decimal = {{24000D, 32000D, 27000D}}
I have a structure like this:
Code:
Public Structure Interval
Public temp As Double
[Code].....
'I want to be able to add to the array like an ArrayList though... 'after assigning values, like this:
interval(0).add
I'm about to start translating my vb.net application, and I don't want to use the default methods provided by Visual Studio to do so. I need my application to be very light, and it nearly doubles it size to use the resources option.Therefore, I'm planning to use some thing like a class, of which I would have one instance per language. Since I don't want to distribute language files as separate files (I'd rather have them hard-coded), I would like to find an easy way to check if every field of the class is initialized. I was thinking of something like an Interface, where I would do something like this:
Public Interface Language
Dim HelloMsg As String
Dim GoodbyeMsg As String
End Interface
[code]....
It's obviously not the right way to do it (although I could use properties instead of vars), but I was wondering whether the was a way to have the compiler check that everything is translated and warn about it if not.
I found out that you cannot set the array size for a structure when you are making it, i.e
[Code]...
I have to fix this by making a variable with type made by Structure bullet and then redimming it, i.e
[Code]...
This means for every variable with the bullet type i create i have to redim. Is there a way i can set the size of .mesh with .capacity for every single variable created with the bullet type automatically?
I have to create an array of structure type in VB.net. but I am getting error while marshaling this error. I have to pass this array of structure type in to Dll function.
Code:
Structure declaration:
<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Ansi)> _
Public Structure dx_entry
<MarshalAs(UnmanagedType.ByValTStr, SizeConst:=10)> _
Public dx As String
[Code] .....
I am getting the following error:
An unhandled exception of type 'System.ArgumentException' occurred in Audit_Demo_2307.exe
Additional information: Type dx_entry[] can not be marshaled as an unmanaged structure; no meaningful size or offset can be computed.
I've got this Function:
Public Class QueryStringUtil
Public Shared Function GetQueryStringValue(Of T As Structure)(ByVal queryStringVariable As String) As T
Dim queryStringObject As Nullable(Of T) = Nothing
If queryStringVariable <> Nothing Then
If HttpContext.Current.Request.QueryString(queryStringVariable) IsNot Nothing Then
queryStringObject = CTypeDynamic(Of T)(queryStringVariable)
End If
End If
Return queryStringObject
End Function
End Class
When I try to call it like this:
Dim intTest As Integer = QueryStringUtil.GetQueryStringValue(Of Integer)("stuff")
Dim stringTest As String = QueryStringUtil.GetQueryStringValue(Of String)("stuff")
Dim datetimeTest As DateTime = QueryStringUtil.GetQueryStringValue(Of DateTime)("stuff")
stringTest gives me the error:
'String' does not satisfy the 'Structure' constraint for type parameter 'T'.
I want our other developers to not worry about having to convert a class to a structure or some stuff like that when they call this function. I just want them to be able to put a standard type in the (Of T) and have it work. I don't mind writing in extra calculations to achieve that. The other problem is I also need the function to be able to return an actual null value, so I kind of need the queryStringObject as Nullable(Of T). Which means I have to have T as Structure otherwise it tells me that won't work. So looks like if I change what T is I need to run some calculation to delcare the var as nullable or not.
I tried overloading this method so that one returns T and one returns Nullable(Of T) like so:
Public Shared Function GetQueryStringValue(Of T As Class)(ByVal queryStringVariable As String) As T
Public Shared Function GetQueryStringValue(Of T As Structure)(ByVal queryStringVariable As String) As Nullable(Of T)
And naturally it's telling me it can't do that since they just differ by return types. Is there anyway to overload this? I really don't want to have two functions.
Given a rectangle of width w and height h. and a coordinate x,y in that rectangle I would like to identify which triangle I am within.
i.e. the function should take parameters(x,y) and return a,b,c,d or a zero based number representing that triangle index i.e. (0=A,1=B,2=C,3=D) if they are in that order.
I think this would be something like >= the formula of the red line and >= the formula of the green line?
I'd like to implement this in VB.NET
How to Save DataTable Structure And Data Into A Datatbase Table..
View 7 RepliesI have a database table of company information.It's about 50 records and contains things like company id, company name, address, phone number, shipping rate1, shipping rate2,etc.I want to load that table into a structure that I can quickly search within my code.I want to search by id to find the company, and then use the company's data to update some records.My lazy way has always been to add a listbox for each piece of data, then do an indexof on the id, then access the same index on the other listboxes.[code]
View 6 RepliesThis code is to draw rectangle. How can I draw rectangle divided to four rectangle or more
e.Graphics.DrawRectangle(Pens.Coral, 50, 200, 30, 40)
I'M creating a kind of photo viewer, and I cannot figure out how to orient the scroll buttons with the photos I want to draw because they all are different sizes.This is really hard to explain so please ask questions if you don't understand.I'M thinking if i could draw every photo on a single rectangle and then the scroll bars will position that rectangle up or down. but is there a way to make a rectangle inside another one so it only shows inside that rectangle?
View 10 Replieshow to save data (for example some text that user type [as password etc]) and save that password on same location where is application. After saving I want to have also Load option so we can load saved data.
View 7 RepliesLet's say I have a rectangle that has been defined like the following :
Dim rectA as Rectangle
rectA = New Rectangle(0, 0, 100, 600)
When I want to dispose it what do I do.
[code].....
I have this
Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
lblText.Text = rectangle1.X
If e.KeyCode = Keys.Right Then
rectangle1.X = rectangle1.X + 5
[Code] .....
And the text changes but the ractangle doesn't move... What can I do?
I have this code where I'm wanting to draw text inside a defined rectangle and if it's too wide I want it to be slit onto multiple lines and if it's too tall, I was it to only paint what it can which right now it's not cutting it off it continues on below the bottom border. Here's my
Dim NotesRect As New RectangleF(mMargins.Left + LeftIndent, m_PagePositionSingle, mMargins.Right, mMargins.Bottom)
e.Graphics.DrawString(NotesString, m_ItemFont, Brushes.Black, NotesRect, New StringFormat(StringFormatFlags.FitBlackBox Or StringFormatFlags.LineLimit))
So; I've drawn this rectangle vb Dim zr As New Rectangle(100, 100, 100, 100)e.Graphics.DrawRectangle(Pens.Red, zr)
View 4 RepliesI have a number of rectangles using powerpacks 3.0 named r1, r2 etc. how to loop through these?
View 2 RepliesDoes anyone know how to take screen shot in a rectangle? And save it as a bitmap?
View 2 RepliesI have a panel (A) which has movable panels (B) inside of it. How can I get a rectangle that contains all of the child panels (B)?
I tried to loop through the controls in the panel and get their x y height and width, find the highest, most to the right, most to the left, and lowest and put those numbers into a rectangle, but no luck.
I've drawing text to a rectangle, say for example "ABCDEFGHIJKLMNOPQRSTUVWXYZ123456789",That should be centered (which it is), but be on one line, not clipped like this:
"ABCDEFGHIJKLMNOPQR
STUVWXYZ123456789"
my String Format is:
With sfFormat
.Alignment = StringAlignment.Center
.LineAlignment = StringAlignment.Center
.Trimming = StringTrimming.Character
.FormatFlags = StringFormatFlags.NoClip
End With
It doesn't even have to trim it, like I have in my code, but it won't even stay on one line.
I draw text (comment on item in an invoice ) inside a rectangle.
[Code]...
I have no problem, the text appear on several lines and it is well wrapped. But if the text is too long to be drawn inside the rectangle, I need to draw the text not drawn in another rectangle (on another page). How can I know the text not drawn in the first rectangle ? I think it is more difficult to use MeasureString because the text is wrapped.
I am working on a graphics application. If there were, for example, 3 rectangles in the picturebox. If you were to right click one of them a contextmenu would pop up. In the context menu you are able to click a button called Fill. When you click fill the selected rectangle gets filled in with the colour white. The rectangles are drawn by the user.
View 2 Replies