I have a class clsContextPopUpMenu to create a ContextMenuStrip with some basic functions (e.g.copy) that I can use in different controls. [code] A broader question is that when should I dispose objects/resource by myself? Of course, gc collector is not a magician to release all available memory. Can I always dispose objects/resource in Dispose Sub as shown above?
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I looked at the Dispose() method in System.Data.SqlClient.SqlTransaction (using a decompiler):
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Why does everyone say in forums that it is Rolling back in the dispose? Where does it rollback?
I have a VB file that imports System.IO, but only uses it is a couple of places.My co-workers and I were wondering if there is a small performance boost if we just use System.IO explicitly were we need it (IE., System.IO.MemoryStream) instead of importing it.
View 2 RepliesI want to pick a value from a DateTimePicker in 'MM/dd/yyyy hh:mm tt' format, add 00 as second with it, store it in a DateTime variable and save it to database. Suppose if I pick the value 05/28/2010 9:25 AM or 05/28/2010 9:25:34 AM from the DateTimePicker, it'll be stored in the variable and saved to database as 05/28/2010 9:25:00 AM irrespective of what value is chosen from the DateTimePicker for second. I'm using the following statement but it's getting failed during the format conversion while storing it in the DateTime variable generating an error.[code]
View 3 RepliesI want to pick a value from a DateTimePicker in 'MM/dd/yyyy hh:mm tt' format, add 00 as second with it, store it in a DateTime variable and save it to database. Suppose if I pick the value 05/28/2010 9:25 AM or 05/28/2010 9:25:34 AM from the DateTimePicker, it'll be stored in the variable and saved to database as 05/28/2010 9:25:00 AM irrespective of what value is chosen from the DateTimePicker for second. I'm using the following statement but it's getting failed during the format conversion while storing it in the DateTime variable generating an error.
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I know this is random but is there a way to specify that a property explicitly does not need to be inherited? So you can have two sub classes and one object will have that property and the other doesn't?
View 2 RepliesPublic Sub VMClim(ByVal table, ByVal tabname$, ByVal tableno) tabname$ has the error all arguements must be explicitly typed, what does it mean?
View 3 RepliesIs there a way to get an enum to explicitly cast to it's base type?If I have something like this:
Code:
Public Enum Packets As Byte
Stuff = &H0
End Enum
I have to do
Code:
Dim test As Byte = CByte(Packets.Stuff)
Rather than
Code:
Dim test As Byte = Packets.Stuff
I don't see why that's the way it works, since you know that the enum will always have values of the base type.
In VBA from Access 2003 I was able to employ the following :Form.Controls(" in here I am able to use a string variable holding the name of the control I want to reference ").property= etc.Is this kind of thing possible in VB .netI have a listview control to which I am adding 'errors' and the tag property of each item hold a string that is the name of the control I want to set the focus to when they double click on the listview item. So I want to do something like this :<listviewitem.tag>.focus()and have the string interpreted as a control name.
View 5 RepliesWhile running the code I've included below I receive the error "EntityCommandExecutionException was unhandled by user code.I'm then told to look at the inner exception for details...and there I see under Data:"In order to evaluate an indexed property, the property must be qualified and the arguments must be explicitly supplied by the user."And under Inner Exception --> Message:"A transport-level error has occurred when receiving results from the server.[code]
View 2 RepliesI want to place 24 check boxes on a form. I want to enable drag and drop for each and place the code to handle the drop on a customized check box, then create each check box from the custom check box. I understand how to create the custom check box, my dillemma is I would like to be able to drop the new control on the form using the form designer IDE.
View 2 RepliesAt the top of my form, I have a status strip with the common "Window" dropdown that is seem in many commerical and Windows Applications. What I am attempting to do is the same that can be done in VB2010 itself. In Visual Basic, clicking the Window Dropdown allows you to choose which window is active. My whole point on this is that they are using a customized Image.Here is an image example from a program called Paint.NETIn the area of the dropdown, you can clearly see that the "Checked" images are customized. For example, Tools is showing the hammer with the glass button frame over it.What I want to know is how would I achieve this customized image set? I already know I would need at least 2 images, one for checked, one for unchecked.
View 5 RepliesI have a FolderBorwserDialog named fbdProfileDirectory and would like to start the dialog at a specific folder (other than the System.Environment.SpecialFolder options). I would like it to start in a file at "C:\Browser\". The program has created this folder and copied contents from a separate directory already. Is there a way to start FolderBrowserDialog, or a similar dialog box at a specific folder?
View 1 RepliesIs it possible to build customized Designers in Visual Studio, for example to mimic the Designer function of the stock Settings template, for classes whose instance variables change drastically from project to project?
View 1 RepliesUPDATED: Feel like this shouldn't be that complicated, but I think I just don't know the proper name for what I'm trying to do. I'm dealing with an ASP.net project. The concept is pretty simple: I have a library that supplies some ecomm functions. One class in the libary contains functions around calculating tax. One class in the library revolves around the cart header. This class is consumed by a web project.
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Suppose I have a Microsoft Expression Blend. Is it possible to create a custom control (such as a button) in MSE Blend and then import it to visual basic 2010?For example, I want to create a custom shape button (different from what is available in the toolbox in VB2010) (like for example a pen-shaped button) in MSE Blend. Can I import it to VB2010 to be used with Windows Forms Projects? If yes, how?
View 1 RepliesI'm attempting to create a customized dictionary object, because I want to add some code to the Add routine, and I can't just inherit because Add is not overridable.
So I'm creating a class that implements IDictionary. Already I am confused, because Dictionary implements a lot of interfaces, listed below:
Implements IDictionary(Of TKey, TValue), ICollection(Of KeyValuePair(Of TKey, TValue)), _
IEnumerable(Of KeyValuePair(Of TKey, TValue)), IDictionary, ICollection, _
IEnumerable, ISerializable, IDeserializationCallback
But IDictionary inherits ICollection and IEnumerable, so why implement all three (and don't they have overlapping methods)?
#2, when I implement IDictionary, the code fills in two Add methods (one for the ICollection add of a keyvaluepair, one for the Idictionary method). Apparently both these add methods are required for Idictionary, yet a regular dictionary (which implements IDictionary) only has one Add method that I can see. I actually would like to have only one Add method if possible. Why am I being asked to make two (and that's before all the other interfaces have been added)?
I am creating a windows application for my company. in the master file i will enter the number of items we are getting from the customer. and in the next page i have to enter the details of each item. For that i have created a datagrid which has one autogenerate number field and the remaining fields must be editable. So that when i enter all the values in the datagrid, it has to go and save in the data base.
View 3 RepliesI have placed a background image on my windows application form and when tab stops to a particular button it's color is changed and looks awkward...Can anyone tell me that how can I set some customized color for tabstop or set its value to null????I've tried the answer from BalaR i.e. button.ShowFocusCues = falase in load event of the form but it says that it can't be used like this and it is protected
View 1 RepliesI have a series of 12 individual projects developed under a single solution. Now I want to create a Setup Project for installation of these projects. I want to have single setup.exe as output which should install either 1 one of these 12 projects based on the user selection.Whenever user tries to install these by clicking setup.exe, he must be provided the option of selecting the project and then installation should proceed installing the corresponding exe.
View 1 RepliesIn my program's properties, I customized my application icon, which I also set on the main form's icon property. If I look in my bin/Release folder or if I run my program I see my customized icon. If I right-click and select Send to -> Desktop on Windows XP, I see a shortcut with my ICON on the desktop. If I do the same thing on Windows 7, I get the default ugly icon. What should I do to get my custom icon on Windows 7 when I make a shortcut from my main EXE?
View 1 RepliesI have created a customized list (by implementing IList) where I added a few special methods. Sometimes (but not always), I only want to expose this list as read-only. To do this for normal lists, I use the Collections.ObjectModel.ReadOnlyCollection wrapper, which works fine typically. But it seems by passing my customized list through this wrapper, my added methods are no longer visible, which defeats the whole purpose of having this customized list object in the first place. How can I create a read-only version of a customized list?
View 2 RepliesI have created a customized control in which i have used some different property names. For eg. if the actual property name in the base class is "Text", i have used the name "CtlText" by internally implementing the "text" property with some additional checks. Now i want the user to use only "CtlText" property during coding. Currently the user is able to see 2 property with same functionalities.
Is there anyway i can surpress the using of a property during runtime?In design time we can hide it using the "Browsable" attribute, but i need to hide the same during runtime also.
I just wanted to ask you. basically, how to make OPENVPN like the one existing now. I do have a working openVPN certificates, but i wanted to run it on my own customized client. i tried searched by its on a different programming language, there's one but still its not on .net.
View 2 RepliesI have an ASP.Net(VB.Net) project which has various modules/functionality. I want to give users the freedom to set their own default startup page.
I don't know how to get a head-start implementing this feature.
Also, I am NOT using MVC
Im new to this .NET programmin...i just need to know some basic stuff abt readin data from excel..I just use ("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + p_fileUrl + ";Extended Properties='Excel 8.0;Mode=Read;IMEX=1;'") to read data.in a particular column,first ten or below cells hav no values and the rest has values.
View 4 RepliesI am creating a windows application for my company. in the master file i will enter the number of items we are getting from the customer. and in the next page i have to enter the details of each item. For that i have created a datagrid which has one autogenerate number field and the remaining fields must be editable. So that when i enter all the values in the datagrid, it has to go and save in the data base.
View 2 RepliesI have a table in ms access. I need it to be imported to the Datagridview in vb 2010 in customized format . The below shown is my access table.
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| ID | Names player | Sports |
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| 1 | aleksy | rugby |
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I need the output in desired format as shown in image2. Check the attachment. This should work for any number of records.
I've been working with System.Drawing for awhile and like to think I have a good handle on it; I've created classes that draw grids, write text in gridboxes and rectangles, convert rectangles to circles, fill areas with color, etc. What I don't have is any sense of artistry at all, and I don't have the slightest clue how one would use System.Drawing to draw a rectangle and then color/slope the edges so that it looks like a System.Windows.Forms.Button would, or how to make it look like it's inset deeper than the surrounding Form, like setting a Panel's BorderStyle to Fixed3D.
View 3 RepliesI'm having issues on where to begin on the next step in my Visual Studio 2010 project.
Here's my original code:
Private Sub Form1_KeyDown(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs) Handles Me.KeyDown
If e.KeyCode = Windows.Forms.Keys.VolumeUp Then Shell("C:USBRelayUSBRelay.exe -c:3 -r:1#1")
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