Convert C# (with Typed Events) To .NET?
Apr 22, 2010
I have an ASPX page (with VB Codebehind). I would like to extend the GridView class to show the header / footer when no rows are returned. I found a C# example online (link) (source). However, I cannot convert it to VB because it uses typed events (which are not legal in VB).
I have tried several free C# to VB.NET converters online, but none have worked.convert the example to VB.NET or provide an alternate method of extending the GridView class.Notes / Difficulties:
If you get an error with DataView objects, specify the type as System.Data.DataView and the type comparison could be the following: If data.[GetType]() Is GetType(System.Data.DataView) Then
Since the event MustAddARow cannot have a type in VB (and RaiseEvent event doesn't have a return value), how can I compare it to Nothing in the function OnMustAddARow()?
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Nov 28, 2009
I'm starting to learn ASP.NET MVC and since I work in a VB.NET shop I'm converting an example from C#. I'm trying to implement a strongly typed view and the example I'm looking at shows the following:
<tr>
<td>Name:</td>
<td><%=Html.TextBox(x => x.Name)%></td>
</tr>
I've come up with the following in VB.NET:
<tr>
<td>Name:</td>
<td><%=Html.TextBox((Function(x As Contact) x.Name).ToString)%></td>
</tr>
Is this conversion correct? This seems really cumbersome (I know, I know, VB.NET is more cumbersome than C#, but I have no choice in the matter).
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Aug 24, 2009
I have a fairly large project (Point of Sales) written in VB6. It has beenused successfully a 2 stores since 2001 (with updates of course).I would like to convert it to VB2008 (although I know about VB "fusion") just to keep it up to date and modernize it a bit.Since using the VB converter brings up such a lot of junk, I'm rewriting each module and form from scratch (although using as much of the original code as possible). One of the functions I'd like to retain is typing in a textbox, and converting each keystroke to upper case as it is typed.Here's the code I use in the VB6 version:
Private Sub txtDescription_KeyPress(KeyAscii As Integer)
Call EnterToTab(KeyAscii)
Char =
[code].....
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Mar 14, 2009
I am trying to make an app the will convert messages so if I type "ab" message box shows "zy"?
Public Class Form1
Private Function ggg(ByVal kinglatest) As Boolean
Dim newletter As String = ""
If kinglatest = "a" Then
newletter = "z"
End If
[Code] .....
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Apr 24, 2012
Possibly a dup but I tried googling and searching here before posting. Assume a 2 column table with columns Age (int) and EmpName (string) A datatable can be converted to IEnumerable by a simple dbTable.AsEnumerable() Now to perform any Linq you must know the column names since intellisense will not pick it up due the fact that AsEnumerable has returned a bunch of datarows that you can enumerate. I have used a small 2 col table but for tables with many columns it is a pain. So most of the time we try something like
[Code]...
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Aug 9, 2009
I create one typed dataset by dataset designer in VS2008. How can I change this dataset to shared typed dataset?
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Oct 13, 2011
I have been trying to implement the jQuery weekcalendar using .net. What I can't seem to figure out is why weekcalendar states events.events is undefined after I make an ajax call to a webmethod I created which returns JSON. Below is the relevant code:
[Code]...
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Aug 2, 2009
I want to make Keybord events and mouse events for learning and educational Purpose.
1. In Form any object like A "picture box" move by Arrow keys .
2. Picture Box Contain many Picture i want change Picture With next and Previos By Arrow keys.
3. I contain Voice of alphabet in Mp3.When i Press any button in textbox then its work.
4. Mouse Pointer Change My Own.
5. I click any Object or any thing By mouse its noice clicking sound like Tik Tik Tik.... Question No 3 is very hard to do . but not im possible
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Dec 31, 2010
I created a control that has picture box control docked within it. This control allows me to "animate" the image by swapping them out by setting the interval to swap them at. I want to use this control kind of like an animated icon within a application, but because the picture box is docked, the control I created won't respond to the events, MouseHover specifically. [Code]
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Dec 9, 2011
Once in a while, I can't see what I have typed until I move to the next line. Same thing if I try to backspace, the cursor doesn't move until I leave the line. I can fix the problem by closing VS and restarting it.
VS 2010/VB on XP SP3
Microsoft Visual Studio 2010
Version 10.0.30319.1 RTMRel
[Code]....
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Aug 5, 2011
I don't know how to use these events and get the appropriate values out of these events ....here is some code that I have copied from a website...
[code]
Private Function MouseHookProc(ByVal nCode As Integer, ByVal wParam As Integer, ByRef lParam As MSLLHOOKSTRUCT) As Integer
Try
If nCode >= 0 Then
Select Case wParam
[code]....
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Aug 21, 2009
Is there anyone who knows how to set a field value to a value that I typed? I have an Xtragrid, binded to sql database and I wanna set the dateedited column to todays date when user changes any field on the grid . Since I'm using devexpress I can't just type columnname and set the text to the value I wanted.
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Apr 18, 2011
I would like to define Sorted to be of type ErrorProviderMessageCollection, which is what unsortedCollection is defined as.
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Jun 25, 2010
I created a dataset in Visual Studio 2010 containing two tables: tblCategories and tblAnswers. tblCategories has two columns: CategoryNumber (AutoNumber and primary key) and CategoryName. tblAnswers has three columns: AnswerNumber (AutoNumber and primary key), Answer, and CategoryNumber. The CategoryNumber columns in each table are related. I have a command button which I want to use to add a record to the CategoryName column in tblCategories with the data typed in a textbox. When I try to access the dataset to add a new row(dataset.tblCategoriesDataTable.NewRow), the NewRow method isn't present. I've done some reading which suggests that I need a TableAdapter, but it seems like that is for connecting to an external file because I have to select a connection. I have no external SQL files or database. I want the user to be able to create a database within my program.
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Sep 28, 2009
Name: RyDeR (RyDeR is what I typed in the Textbox) Age: 17 (17 is what I typed in the Textbox) But now I have another Textbox but I want that this textbox automatic changes with what I type in the first boxes. Example:
His name is 'RyDeR' He's '17' years old
.. Like this and if I type something else, it must change to in last textbox.
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Oct 24, 2009
How would i get the last letter the user typed in?
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Apr 15, 2011
Yesterday I was at an interview where my interviewer (who admittedly didn't claim to be an expert on the subject) stated that "VB.NET is more weakly typed then C#" - (At the same time he couldn't recall an example). This statement seemed incorrect to me (particularly given that both languages use the same framework libraries for their types) and I advised as such and that perhaps he was confused with the option to turn Option Strict or Option Infer on/off.
At the same time I know that VB.NET has situations where it will do type coercion - leading to occasionally unexpected results (although I also cant recall under what conditions) - (Actually I think I just remembered that it was mainly when performing arithmetic operations with different types - whereas other languages will force you to be explicit (?) ).
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Nov 19, 2009
Is there a way to easily prevent spaces from being typed in, particularly in the column I have called Name?
For some reason, all attempts that I have tried have failed!
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Jun 23, 2011
i want to create a console app that looks for specific commands that are imputed, such as "download [URL]
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Apr 1, 2012
What is a code that I can use for my program to do something when the user types a certain word into a rich text box?
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Sep 12, 2011
I've got a typed dataset. I bind the data with a binding source to a form with arround 200 textboxes, dataedits and so on. Everything works fine with one exception:In my database I have empty DateTimes (DBNull.Value). And when they get bound to a DateEdit-Control, I get the following exceptions:
A first chance exception of type 'System.InvalidCastException' occurred in Microsoft.VisualBasic.dll
A first chance exception of type 'System.Data.StrongTypingException' occurred in myTestDLL.dll
I tried to change the NullValue-Property in the DataSet-Desinger to something else as 'Throw Exception', but it doesn't work for a DateTime. For other types like Integer or String it works fine.I dont know a nice solution (right now I fill the empty dates with some dummy date and make it invisible in the DateEdit-Control, but this is very uncool) and I hope to find some help here.
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Apr 30, 2010
I have a DB application that I've created using the Datasources wizard. A particular insert requires that two inserts must be done at the same time meaning that it has got to use transaction. how to use transaction in this situation.Only performance counts!
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May 25, 2010
How do i use a while loop and MID$ function instead of the split function?i'm trying to have the input (textbox) compared to a list(array) in a text document?
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Jan 8, 2010
I have the following code compiles without issue. Of course, I get an invalid cast xception when executing the Dim C As IDoThingsC = GetThing_C(). Am I missing something?Would you ever want to return an object that does not meet the interface requirement for a function return value?
Public Class ClassA
Public Sub DoThings_A()
Debug.Print("Doing A things...")
[code].....
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Apr 7, 2009
I'm looking for a the shortest/aseist way in VB.NET (or C# but using VB.NET at the moment) to get the string value of a method's name dynamically given the method call.For instance, I have a class like this:
Public Class Blah
Public Sub Foo()
End Sub
End Class
Now Foo is a strongly-typed cover for a dynamic setting and I have an event handler that will fire when the setting changes and return the string name of the setting that changed.
I'd like to be able to switch/select on this string and have a case based on the Foo() method. To do this I need to able to get the string name of the Foo method from the method call itself (i.e. somehow GetMethodName(blahInstance.Foo())).
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Apr 16, 2011
Is there a way to let only certain chars be added to a datagridview cell? like '1234567890'?
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Jul 18, 2010
I'm wanting to have some datatables that are just used temporarily, mainly for creating and listing friendly versions of data that will be easier for the user to read in drop-down combos etc.
I would like them to be strongly typed to pick-up bugs at design-time. However I'm struggling to know how to achieve this. Do I need to create a custom class and inherit from DataTable and build the columns in the class constructor?I don't need a Dataset, just a DataTable?
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Apr 20, 2009
Firstly here's the code and i will explain my problem underneath. [code...]
Now as you can see I have a variable that holds a value member of the combo box Products which is the productID of the current product selected. Then it searchers through the products datatable and once its found the correct product or not it stores the answer in slectedproductrow. next I test to see if selected product row has found the product if it has i then see if the product has already been added to the order by seraching the the customer current order datatable if it hasn't it adds the current information to the order by using selected product row.
Now the problem i get is when i add the same product it still adds the information again as currentorderrow comes back as nothing everytime even if the product has been added before but if it was in the table which it should be it should skip that bit and just go to add the current qtys toghther.Also if i go to add a diffrent product it overwrites the the other one. So i can't store the customer order. Its like i can't store more than one row. By the way I have a datagrid and can see the product get over wrriten.
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Jan 8, 2012
How can I disable letters from being typed into listbox?I know I can use maskedlistbox and easily select what can be put into it, but then if I use that can I set a limit to 2 units only?
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Jul 23, 2009
Public Sub VMClim(ByVal table, ByVal tabname$, ByVal tableno) tabname$ has the error all arguements must be explicitly typed, what does it mean?
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