I am dynamically declaring types (using ModuleBuilder.DefineType() which are used to allow for strongly typed data sets from a CSV file. However when the user adds or alters a column definition I'd like to remove and rebuild the data type. How I drop and recreate a type - do I have to unload the whole assembly or how is it done?
View 3 Replies
my application adds fields to a table dynamically, is it possible to 'rebuild' a datatable or even change its SQL so that my grid picks up the new fields?
View 6 RepliesI have a delegate and its event in C# as below:
public delegate UsernameCredentials UsernameRequiredEventHandler( object sender, string endpoint );
public event UsernameRequiredEventHandler UsernameRequired;
On Converting the above code in VB.Net as follow :
Public Delegate Function UsernameRequiredEventHandler(ByVal sender As Object, ByVal endpoint As String) As UsernameCredentials
Public Event UsernameRequired As UsernameRequiredEventHandler
I am getting error on the above line saying that "Events cannot be declared with a delegate type that has a return type".I understand that this is not supported in VB.Net.
I am trying to use a checkbox that is dynamically declared in an .vb file that I am trying to write into my .aspx page. I am able to write a normal checkbox of <input type='checkbox /> from the .vb Class using Response.write, but it comes up blank when using <asp:Checkbox runat='server' />I need to pass whether or not the box is checked back to the server, because I am having to either approve something if one is checked, reject something if the other is checked or do nothing if neither are checked.
View 3 RepliesHow to remove dynamically declared text boxes from a form. The textboxes are declared as an array.[code]...
View 5 RepliesI have an object that I know was originally declared was an enum, but I need tothe specificnum type. I'm aware of the GetType method and it appears to work correctly, but I can't figure out how to go from there to a direct type comparison For reference types, you can use Typeof(object1) Is Class1, but this doesn't seem to work for value types.
View 3 Repliesi've got a custom integral type, and i want to be able to
Private Enum ENUM_Stuff As MyInteger
what i want to do: to know if there is anyway to make the above statement valid
I want to create an xml output for my code, in VB6 the XMLfile is declared as type XML, how is this done in VB.Net?
View 7 RepliesI have a server program. It logs all of the lines on the console textbox in their proper folder, named by their type: Logs\Year\Month\Day\Errors.txt There are about 7 types that it logs. All of these show up in the console window. However, I have check boxes that I want to toggle the types that show up in the console window on and off. For example if I want to hide the Error and System types, I want the rest of the types to show. I know I can do this simply, but if I re-check the boxes to show the System types as well with the others, I want it to show the logs in their proper place in the console window, and that I cannot figure out how to do.I am stuck on this problem and cannot figure it out. I know it involves much more than an If statement to display the types correctly in the right place on the console. Please help me out with some idea of what I need to do.
View 14 RepliesI am dynamically creating a table which places a dynamically created radiobuttonlist in each row.
I then want to display the results on the page when the submit button is clicked.
I am getting an error message stating that
'question1' is not declared
Why might this be happening?? I've included all my code below.
Code behind:
Sub Page_Load(ByVal Sender as Object, ByVal E as EventArgs)
For i As Integer = 1 To 3
Dim TableRow As New TableRow()
[Code]....
I have declared an array of text boxes created dynamically at run time. The textboxes are assigned some values by user. The text boxes are located in a Form so that once the user fills in the info and clicks the "ok" button, these values are passed at the back end and the form dissappears. However the user can bring back the form again by clicking another button.
The problem is that once the form reappears, the information previously provided in the form remains. Even the user clears the text boxes to provide new value, the text boxes at code behind do not receive these values.
Just wondering if its possible in VB.NET RegEx's if you can do conditional substitutions when rebuilding a string, in the sense that extra characters can be inserted if missing. I offer this bank account example, were we're trying to standardize a bank account into the format XX-XXXX-XXXXXXX-XXX, note the 3 XXX's in the suffix
[Code]...
Is it possible to declare a variable and to choose it's appropriate type during runtime?
it should be something like this (of course, the last line does not work):
'Determine what type of variable is needed later
Dim myVariableType As System.Type = System.Type.GetType("System.String", True, True)
'Create variable with needed type
Dim myVariable As myVariableType ' Should be a string variable in this case
I'm using LINQ to Entities to generate typed result sets in VB.Net. I've got a generic Report class as follows:
Public Class Report
Public Property Name As String
Public Property SQL As String
Public Property Type As String
End Class
Then in the calling scope I want to have code that does something like:
' create my data context
Dim context As New MyAppEntities
' get a report object out of a dropdown list
[Code]....
So far I'm finding that .Net won't let me set the type in the (Of Type) clause on the fly at runtime.
Does anyone know how to do this?
I've tried changing the Type property of the Report class to an object of type Type, but that doesn't work either.
BTW, I know there are alternative ways to accomplish the same thing, but I'm working with external constraints that make this what I've got to work with right now.
I 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 Repliesi have 2 mustinherit classes where one is a generic one:
'Visual Basic 2008 - .net 3.5 - Any CPU
Public MustInherit Class BaseObject
End Class
Public MustInherit Class BaseObjectList(Of T As {New, BaseObject})
Inherits List(Of T)
End Class[code]...........
i receive: "Type argument BaseObject is declared 'MustInherit' and does not satisfy the 'New' constraint for the type parameter"users would never enter data in the wrong form,files they choose to open would always exist and code would never have bugs.
I am using zedgraph to draw bar chart in my vb.net project. The bar base is Y (meaning all bars are horizontal). I have 9 fields for user to choose from, and once a user clicks a field, one corresponding bar will show. Of course, the user can click off the selected field to remove the corresponding bar item. I can do this. The basic idea is to get all bar items and set their visibility according to user's selection. My problems is that I want to have a textlabel next to each bar (this text label is different from legend)so I set the yAxis.Type=text. There are two problems:
1) When I add bars, I still need to specify x and y value. How do I set y value in this case to make sure bar ally perfect with its text?
2) As far as I know, I can add text labels by an array as the last line code shows. But obviously this only works for bar chart with fixed bars. In my case, the number of bars and also the order is changing based on user selection. How can I set text labels?
[code...]
The following is a screenshot of the problem: What can I do?
View 3 RepliesWhen I dynamically compile SilverLight 4.0 application using Microsoft.VisualBasic.VBCodeProvider, I get the following error.
Line: 118 ErrorCode: BC30002 Error: Type 'System.ComponentModel.Design.HelpKeyword' is not defined.
Line: 130 ErrorCode: BC30002 Error: Type 'System.ComponentModel.Design.HelpKeyword' is not defined.
Line: 141 ErrorCode: BC30002 Error: Type 'System.ComponentModel.Design.HelpKeyword' is not defined.
Line: 234 ErrorCode: BC30002 Error: Type 'System.ComponentModel.Design.HelpKeyword' is not defined.
I have this code.
Code:
Public Class Form1
Dim NPB As Button
Dim x As Integer
[code]....
As you can see, when I open a program from my menu, a new button will be created with text similar to this, "C:Program ". The button it self will not do anything. How can I create the method at the same time the button it is for is created? Also how can I change the text do that it gives me, for example, CCleaner.exe instead of the whole target path?
I can usually find the answers to most of my questions via the Google Gods, but not this time.I have a form that has a TabPageControl and on that page a collection of labels and text boxes via a usercontrol.
On the form I have a button that allows the user to create a new tabpage, when the code adds a new page, it automatically adds the UserControl collection. I can't get my head around how to access the objects on the newly created tabpage.
What I need to be able todo is take the index of the tabpage that has focus and translate that against the UerContol name, but I havn't a clue how to do it!
[Code]...
I am adding a grid of buttons to a form at run-time, and all of then use the same Handler.My question is : Is there any way I canadd the TextBox at run-time ?I know how to but without it on the form, the IDE isn't very happy about the "MyClick" Sub - TextBox1 is not declared......
' some logic here to make nice rows and Columns of buttons
' with different .Text and .Name
Me.Controls.Add(btn)
[code]....
I have an application that dynamically creates winforms.
Dim NewS As New Form
Dim NewT as new Timer
NewT.Interval = 5000
[Code].....
[code]...
I got some of the code from my other thread. I had over 100 textboxes, and I wanted a loop that got all of the text from the boxes, and copies it to clipboard.What is wrong with the syntax?
I am brand new to the programming scene and I beyond lost. My first excerises I got no problem, but I am having problems with calculations and names not being declared.I tried following the book, but I cannot seem to get rid of these few! [code]
View 1 Repliesok idk where i went wronge here this is the code and the error to this code is
"strPath" is not declared. it may be inaccesible due to its protection level.
Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click For Each Item As String In IO.Directory.GetFiles(strPath, "*.*", IO.SearchOption.AllDirectories)
[Code]...
When i use the code below i get the following error:Quote:
Name 'Cert_NoTextBox' is not declared
If Me.ActiveMdiChild.Text = "Form_Minor_Cert" Then
Form_Report_Minor.CertNo = Cert_NoTextBox.text
[code].....
I have an application that dynamically creates winforms.
Dim NewS As New Form
Dim NewT as new Timer
NewT.Interval = 5000
[code]......
I am trying to write a console app in VB Studio 2005 that writes the source code of a URL to a text file. I have added a reference to Microsoft Internet Transfer controls to my project but when my code first references Inet1 there is a compiler error. What am I missing?
View 10 RepliesI get the following error when trying to secure a password string.
'name ConvertToSecureString is not declared'
here is my code:
Dim
pswrd As SecureString = ConvertToSecureString(Me.TB_Password.Text)
Dim strcmd As String = "net use" & " " & Me.CB_Drive.Text & ":" & " " & "\" &
[Code]....
