Display A Value Of A Variable, Type Into A Textbox?
May 26, 2010i want to display a value of a variable, type into a textbox.
for example
num=1234
varx=763
i=23
[Code].....
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Store Values To A Double-type Variable, And Ask To Display It On The Screen, There Seems To Always Be A Discrepancy?
Mar 16, 2010Whenever I store values to a double-type variable, and ask to display it on the screen, there seems to always be a discrepancy, for example, I entered 7.416 to a textbox and assigned it to a double. When i ask for it to be displayed, it used to be that the 7.416 is returned to me. But just a few days ago, when I debugged my program again, it returns numbers like 7.4159987.......[code]....
View 7 RepliesDisplay The Contents Of A Variable In A Textbox
Oct 3, 2009Does variable total have to be converted back to string ie..Cstr(total) in order for the result of total to be displayed in the text box txtdisplay? I notice It will work if I convert it to string or If I leave total a double it will still display the result as a double. what is the correct programming practice? [code]
View 1 RepliesTextBox To Display Options When Type Something In?
Sep 18, 2011I want my textBox1 to display options when i type something in. For example: I type "@" and a list of autocomplete suggestions should show up, sayin "@gmail.com", "@Hotmail.com", "@Live.com" and so on. I have tried entering a collection in the property "AutoCompleteCustomSource".
[Code]...
VS 2008 Calculate And Display Unknown Variable In Another TextBox
Jan 1, 20121.prompt a text string in 0 to 20 characters and then pass it as a input parameter to a Boolean-valued Function to check if the string is symmetric or not. Display the result.
2.The Einstein's equation E=mc2 relates three variables, E, m, and c. create four TextBoxes, two for the names of variables (E, m, c) and the other two for the values of corresponding variables. Based on the entered names and values, calculate and display the unknown variable in another TextBox.
Cast Array In Object Variable To Type In System.Type Variable?
Apr 14, 2010I have this function:
Public Sub DoStuff(ByVal type as System.Type, ByVal value as Object)
End Sub
The 'value' argument is always an array of the same type as 'type'. How can I loop through the values of the array?
I'd like to be able to do something like this:
DoStuff(GetType(Integer), New Integer(){1,2,3})
Public Sub DoStuff(ByVal type as System.Type, ByVal value as Object)
//Strongly types arr as Integer()
[Code].....
Cast A Variable To A Type Represented By Another Type Variable?
Oct 10, 2009I'm aware that questions like this have been asked before and I doubt it's possible, but I just wanted to make 100% sure that it isn't.In VB.net or C# (either language, it doesn't matter), I want to cast a variable to a type represented by another Type variable. Here's an example of the kind of code that would be needed in C#:
Object castMe = new Foo();
Type castTo = typeof(Foo);
Foo beenCast = (castTo.GetRepresentedType())castMe;
[code].....
Program Function - Says, "The Type For Variable [variable] Will Not Be Inferred Because It Is Bound To A Field
May 18, 2012Public Class Form1
Dim x, c, number(0 To 19) As Integer
Dim s As Integer
[CODE]...
The variables in the brackets [example] do not actually have brackets in them in the original code. These are where the issues are. For both variables, it says, "The type for variable [variable] will not be inferred because it is bound to a field in an enclosing scope. Either change the name of [variable], or use the fully qualified name (for example, 'Me.[variable]' or 'MyBase.[variable]')." Now, I'm not entirely sure if this is a stupid question or not, as I'm used to VB '98 because that's what we use in my programming class at High School. let me know why this won't work.
-Note: The intention of this program is to continually loop the generation of numbers for this list until I tell it to stop. Button1 ends the program, Button2 generates the list one time only, Button3 is supposed to loop the generation of the list, and Button4 is supposed to end the loop, but not the program.
Variable Naming Conventions To Illustrate Variable Type And Where Variables Are Declared
Aug 24, 2009I am looking for a good resource on variable naming conventions to illustrate variable type and where variables are declared. So I will have public variables, Private variables, private or local variables. I also may want to declare variables with the same name in different class code (i.e. in the code behind different forms). I am assuming good coding would dicatate a prefix for declaration location.
View 4 RepliesWrite A Variable To A File That Has A Different Type Than The Function Assigned To The Variable
Sep 17, 2011I have the following code that I am using to parse out a test file. I am getting variable conversion error in Sub Main() when I assign file = Read(). The return value of Read() is a TextFieldParser type. How do I assign the proper variable type to "file" so I can write the output to a text file?
Function Read()
Using MyReader As New FileIO.TextFieldParser("C:UsersColinDesktopParse_Me.txt")
Dim currentRow As String
[Code].....
Statically Type Local Variable To Be Static Type Of Expression On Right Had Side Of Assignment?
Dec 22, 2009E.g. how do I get VB.Net to statically type a local variable to be the static type of the expression on the right had side of the assignment?
View 1 RepliesExplicit Conversion - Convert The Variable D From Double Type To Integer Type And Store The Result As 132
Oct 22, 2009I want to use explicit conversion (CType function in VB.NET) to convert the variable d from double type to integer type and store the result as 132.
Imports System.Console
Module Module1
Sub Main()
[CODE]...
This is my code. But Visual Basic tells me an error: Error1Type 'i' is not defined.C:\Users\mihaispr\Desktop\Conversie explicita\Conversie explicita\Module1.vb1922Conversie explicita
C# - Copy Object Of Type AA To An Empty Variable Of Type BB?
Feb 15, 2010Writing an asp.net mvc app and i have something like this...
Public Class AA
'... has some variables...
End Class
Public Class BB
[code]....
So, now in my program, i just want to copy object of type AA to an empty variable of type BB?it makes sense to do this, as i expect all the fields in AA type object to be copied to the newly created BB type object, and the ExtraVariable in the BB type object i would (will) just assign a value to it later (after the copy) on my own time!!I know copying BB type to AA type would not be appropriate as there would be lost data!But im trying to copy AA to BB, I've used both DirectCast and CType to do this, and i keep getting "unable to cast" error!
Note: I'm using vb.net (but can read c#, no problems)
Declare A C# Variable Into An HTML Type Variable?
Dec 2, 2009What's the C# equivalent of
<% dim name %>
so you can use it for web forms in PayPal API integration?
VS 2010 Custom Type Array / List With Adding Items And Specifying Custom Type Variable
Jun 21, 2011I recently downloaded VB 2010 Express so i am quite new to the language, but i have worked with dark basic, which seems to b very similar.Anyway, my problem is that i cannot seem to correctly set out my array of a custom type/class. i am trying to create two arrays, one of available entities and another of selected entities of which the user selects the entities to be dealt with in irrelevant ways. i have creates a button (called test) which adds some entities to the available list and all the entities come back the same value but they shouldnt be as you'll c in the code. i have run the step into command a found that "available.item(#).Name = " will change all of the entity's names.As of current i am working with lists as the array kept asking for a 'new' statement but i couldnt figure out where to put it.[code]
View 7 RepliesType 140 Characters In Asp.net Textbox With Multiline Characters Will Be Decreased As I Type In Textbox
Dec 13, 2010I wanna type 140 characters in asp.net textbox with multiline when i type in textbox then the characters will be decreaded means if i type two characters in textbox then in label the available characters will be shown is 138..using vb.net
View 1 RepliesForms :: Display Picture In Picturebox1 - Shows This Message, Unable To Cast Object Of Type 'System.DBNull' To Type 'System.Byte[]'?
Dec 24, 2009Now I want to display picture in picturebox1.To do this I use this codes, but it does not display picture
on this line: Dim arrPicture() As Byte = CType(dt2.Rows(0)("img_path"), Byte())
it shows this message,
Unable to cast object of type 'System.DBNull' to type 'System.Byte[]'.[code]......
Checkboxes And 1 Textbox In Webform If I Type In Textbox 1,2 Then Checkbox1 & 2 Will Be Checked?
Nov 13, 2010I have 4 checkboxes and 1 textbox in webform if i type in textbox 1,2 then checkbox1 & 2 will be checked !
directly after if i type 3,4 in textbox then the all 4 checkboxes will be checked But i want the checkbox will be checked accorcding to the data displayed in text box ..if textbox1.text =1,2 then only checkbox1 and checkbox2 will be checked and others are remain unchecked ...
and if i checked checkbox3 and checkbox4 then only 3 and 4 will be checked and others are unchecked...
how to do that in page load event I want to do this with 50000 checkboxes ..and more.... which displayed in my webform
[Code]...
But if i type 1,2 in textbox then checkbox 1 and 2 would be checked and agin i type 3,4 then checkbox1,2,3 and 4 all the checkbox will be checked ...but i want ...what everi type in text box only that checkboxes will be checked and others will remain unchecked.....
Transferring Variable From Textbox To Another Form's Textbox?
Nov 7, 2010QuoteImports System.Data.OleDb
Public Class admin
Inherits System.Windows.Forms.Form
Dim mypath = Application.StartupPath & "\db1.accdb"
Dim connection As New OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=d:\db1.accdb;Persist Security Info=False;")
[Code]...
Display Queried Results In Textbox Where Criteria In Another Textbox 1 Form
Jun 21, 2010I have a database I am creating with about 50 users over a network. There are about 6 groups of users and these users are spread across 10 branches. I want to block/allow users from particular forms and views. For example I want branch users forms to be filtered by their branch number but depending on the group they are in they can only see some forms. i.e. 50 users, 10 branches, each branch has about 5 ppl of where 1 is in group A and 4 are in group B. I want all users that belong to branch 1 to see the information they enter, but Group B enter data but cannot approved or delete, and group A can enter, approve and delete. So then. On my login form I have the user type his/her username but the i want LEAVE function to update 2 textbox where I have named GroupName and BranchNo. Basically to run a query and look for the username and return in one textbox that user's groupname and the other textbox the user's branch no. This information will be used to filter forms and block the user from certain controls. This is the code I have so far but still can't figure how to display the results.
Private Sub UsernameTextBox_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles UsernameTextBox.Leave
'Make Connection to database
[Code].....
It keeps highlighting the BranchNumber and UserGroup and giving error "Value of type 'String' cannot be converted to System.Data.OledbCommand
Unable To Cast Object Of Type 'System.String' To Type 'System.Windows.Forms.TextBox'
Jun 12, 2011Unable to cast object of type 'System.String' to type 'System.Windows.Forms.TextBox'.
View 12 RepliesCan't Copy Paste Cut Code - Gives Error "Unable To Cast Object Of Type 'Public_Information_System_Remake.PIS' To Type System.Windows.Forms.TextBox"
Mar 31, 2011same errors or something related to System.windows.forms. Unable to cast object of type 'Public_Information_System_Remake.PIS' to type 'System.Windows.Forms.TextBox'.
[Code]...
Casting To A Variable Type?
Jun 22, 2009i have a property (items) that i want to use for either a checkedlistbox or a standard listbox depending on the value of another property.
heres the code i wrote that doesn't work:
[Code]...
Change The Type Of Variable?
Mar 6, 2010In some part of my code i need to redefine the type of variable that was defined with a different type at the beginning
dim T as new MyClass
...
redefine T as ( MyClass2)
i do not want to do something like
dim T
t= new MyClass
.....
t= new MyClass 2
Create Something 'OF' A Variable's Type?
Sep 17, 2009I have some code like:
Lookup(Of String)("Testing")
Lookup(Of Integer)("Testing")
And both of those Lookups work great. What I'm trying to is call the appropriate LookUp based on the type of another variable. Something that would look like...
Lookup(Of GetType(MyStringVariable))("Testing")
I've tried to Google this but I'm having a hard time coming up with an appropriate search.
Declare The Type Of A Variable?
Mar 17, 2009What's the main problem if I don't declare the type of a variable? Like, Dim var1 versus Dim var1 as Integer.
View 6 RepliesTextbox Countdown That Will Display Text In A Textbox In Days?
Jul 21, 2009I need code for a textbox countdown that will display text in a textbox in days.
View 13 RepliesAssign The Value To Multiple Variable Of Same Type In .net?
Nov 22, 2006I want to Assign the Value to Multiple Variable of same type in .net and that to in one line of Code.
View 6 RepliesCheck The Final Type Of A Variable?
Sep 6, 2010I have a BaseClass, a DerivedClass1 and a DerivedClass2 from a third party library. DerivedClass1 and DerivedClass2 both inherit from BaseClass.There's a ContainerClass, from the same library, with a member variable ActiveItem, which can be of DerivedClass1 or DerivedClass2, so it is declared as BaseClass.I want to know if ActiveItem is of DerivedClass1, as it can change in runtime without notice.If I do
Dim isDerivedClass1 as boolean = TypeOf(oject.ActiveItem) Is DerivedClass1
then I get a compile time error, telling me that ActiveItem can never be of DerivedClass1 type.I have tried several combinations of GetType and TypeOf but it doesn't seem possible to check this. I have also tried to declare an auxiliary DerivedClass1 variable and comparing their types, but haven't got any luck either.
Edit:The following code doesn't compile in vs2005 SP1.
Public Class Base
Public x As Integer
End Class
Public Class Derived1
[code]....
Define A Type For Each Session Variable?
Sep 18, 2011Im trying to grasp session varibles, i understand what they are etc but i would like to know how to define a type for each session variable.Iv written it like this
Session("Title") = txtTitleContent.Text
How can i tell it what type of value is going to be in it, because at the moment im only playing about with strings, but what if i have an integer and want to pass it back to the back end to save it will throw an error saying "conversion from string to integer is not valid" should i use Cint to deal with this?
