In VB.NET, I have a LinkButton that, when clicked, creates a report. We want to disable this functionality based on whom is logged into the system. I have a session variable to indicate whether this should be visible or not but when I set idLinkButton.visible = False, it has no effect. Any ideas on what I need to do to be able to turn this on and off?
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I have a linkbutton inside datalist1 item template field, i want when user click on linkbutton then its text would be "enable" and if the linkbutton text is "enable" and panel1 will be visible then again on linkbutton click event linkbutton text would be "disable"and panel1 will be hidden...
View 1 RepliesI have a vb.net application that, when a short cut is pressed, a window pops up. I also would like to make it completely invisible, unless the short cut is pressed. In the default class that houses my code for noticing the short cut and coordinating the events of the short cut, I have placed the following code:
Me.ShowInTaskbar = False
I have isolated this code as the issue. The issue is that my application does not work when it is not shown in the taskbar. This is only the default form - for the pop up window I have a separate class. How can I create a workaround for hiding the window in the taskbar and hiding it in general?
Btw, this is my hotkey code:
Public Const MOD_ALT As Integer = &H1
Public Const WM_HOTKEY As Integer = &H312
Public Declare Function RegisterHotKey Lib "user32" (ByVal hwnd As IntPtr, ByVal id As Integer, ByVal fsModifiers As Integer, ByVal vk As Integer) As Integer
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Assume you have controls A, B, C, D and E all with a Visibility property. You also have states 1,2,3,4,5 and 6 in which various combinations of your controls would be displayed. Currently this is being handled by switch statements for each state: i.e.
Select Case PageState
case "1"
a.visible = false
b.visible = true
[code]....
As you can imagine, this becomes a pain as every state needs a show/hide statement for each control. How can I refactor this so that adding controls and/or states becomes trivial?My first instinct is to extend the control and add a collection of states that it should display for but this sounds like overkill.
Edit:I was deliberately vague in my question in case this has other implications. In my current instance the "controls" in question are ASP Panels. Does that change anything?
I want to put a print functionality on my system. Ive found tools on vs 2010 that are related in printing functionality, can you help me modify those?
View 2 RepliesI have computers joined to a domain. I'm writing a desktop application that ask for a username and password to authenticate user against Active Directory.Sometimes, user uses this application on the computer that is not joined to the domain.I'm using .NET 3.5, System.DirectoryServices, and System.DirectoryServices.AccountManagement. Code sample how to authenticate users:
Private Function ValidateExternalUser(ByVal username As String, ByVal password As String) As Boolean
Using context As PrincipalContext = New PrincipalContext(ContextType.Domain, "your_domain_here")
Return context.ValidateCredentials(username, password, ContextOptions.Negotiate)
[code]....
I want to know how to check if user is already logged in on domain computer, then I don't have to ask them log into the application again.
Update:If it can't be done with System.DirectoryServices.AccountManagemen, is there any way to do it?
When connecting to data I always like to use the Configuration methods:
2005
Dim settings As ConnectionStringSettings = _
onfigurationManager.ConnectionStrings("csCambra_2")
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I have had several occasions recently to access a specific class several times over a relatively small time frame.So I've been storing the value of the class in Session and trying to access it on page load, if it's not available creating a new instance and storing that in session.
So instead of constantly replicating the same code for different classes on different pages I'm trying to create an extension method to do this for me.
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I'm stuck on what to do when I make my new instance of my class (it would have to have a New() sub)
I'm not sure where to go from here... or even if this is the best way to do it.
I'm quite new to VB.net (and VS 2008), so I'm afraid my question might be basic, but I'm not sure how to solve it.I have a winform with three textbox fields and a button. All textbox fields must be filled before the user can click the button to continue. To this end I would like to disable the button as long as there is at least one empty textbox.
If I had only one textbox field, it would be easy for me to do. In the Textbox1_Leave event I would check if Textbox1.Text is not empty and if so, set Button1.Enabled = True.But what should I do if I have three textboxes? Have three event handlers, one for each textbox? Or is there a way I'm not familiar with?
My datagridview consists of Three columns.
1st column is Datagridviewcolumn
2nd column is datagridviewcheckboxcolumn
3st column is Datagridviewcolumn
so 3rd column i made as readonly.so i need to enable the 3rd column cell based on the checkbox check properry
so i am generating datagridview column dynamically and populating values in the datagridview dynamically.so my need is after populating the value if i check the check box the current row of the 3rd column cell has to be enabled. so how to do this. please show me some sample code if there any. please
I am trying to put in scripts for google analytics in my code. But I want it to run only if the environment is production and not in dev or qa. This javascript runs at page load itself and I am confused how to make it run conditionally. My app is an asp.net app.
Javascript is always confusing to me. There are many other javascripts in the page and I just need to disable this one. Had it been a .net code/function I would check for the environment and conditionally run the function. But I am confused about how to accomplish this type of functionality with javascript
What i am trying to is create a function were by a user when he logs in, based on the rights given to them they can either use certain buttons . I no i have to use the enable and disable function.[code]if username is true and user_name is Sales then enable x y z buttons. i been trying looking around and reading and found the following which i cannot get to work with my system but they follow a similiar patten to what i want to achieve.[code]
View 1 Replieseach of the ToolStripMenuItems has more than 20 ChildItems and each of these ChildItems have more than 30 ChildItems.In my form I havea login form and each user must log in.I want to know that how can I check my UserAccess Table with these MenuItems and ChildItems names and if the user does not have the MenuItem or ChildItem name in UserAccess Table, the MenuItem or ChildItem must be disabled.
View 16 RepliesHow to enable / disable menu items based on allowed security roles specified for an item.
View 6 RepliesIs there any way to disable a system device from VB.NET. Such as a device that needs to be enabled/disabled quickly and or uninstalled.
View 1 RepliesI would like to disable some or all system sounds for a .NET 3.5 application.
I cannot find anything around System.Media.SystemSounds that turns off sound settings that the user has chosen via the control panel.
How do I go about enabling or disabling a system device as its done in Device Manager?On the right click / Properties menu there is the option " Device Usage "
View 3 RepliesIs there any way to enable/disable system restore using ManagementClass? I have this code but it does not work (on Windows 7 anyway), any ideas?
Dim oScope As New Management.ManagementScope("\localhost
ootdefault")
Dim oPath As New Management.ManagementPath("SystemRestore")
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I want to disable the clock so no one can edit the time.
View 6 Repliesi want to set the system date of my a client pc based on the system date where the sql server reside.In short i want to sysncronize the date between the client and server.I have a working code in vb6 but i dont know how to do it in vb 2008.
dim RstDate As ADODB.Recordset
Set RstDate = New ADODB.Recordset
RstDate.Open "SELECT GETDATE() as ServerDate ", CnAP
[code]....
I have linked my vb.net application with mysql database but i am having a problem inserting data from the vb forms into the relevant fields in the database...
View 1 RepliesI've written a pretty good browser in vb.net (it's in the "Share your Project" forum). I now want to give users and other developers the ability to extend/add buttons & functions to it. Can anyone suggest to me a good way of implementing this bearing in mind that I've never tried to do anything like this before? (so basically a way of implementing a plug-in based system. I was planning on these being small snippets of code which my application has the ability to compile.)
View 5 RepliesWhat I want to do is basically have a column that ranks the users so if there were 10 people it would rank the person with the highest sales 10 and the second highest 9 and so on. Theres not always going to be 10 employees
I am using a stored procedure along with a sqldatasource to connect to my stored procedure. To get all the data for each agent, then I am using functions like
Dim TotalSales As Decimal = 0.0
Function GetTotalSales(ByVal Price As Decimal) As Decimal
TotalSales += Price
[Code]....
and then some how sort the array list and print the index of the agents sales total?
MSDN: Int32 values are represented in 31 bits, with the thirty-second bit used as a sign bit. Positive values are represented by using sign-and-magnitude representation. Negative values are in two's complement representation. Isn't it true that the representation of positive values using sign-and-magnitude system is identical to the representation of positive values using two's complement system? So shouldn't it have been rewritten as: "Int32 values (regardless of positive or negative) are represented in two's complement representation",
View 1 RepliesI am trying to convert a vb6 program based off of the coordinate system. VB.net does not seem to recognize any of it.
View 2 RepliesI am in the process of developing an application for one of my clients. I am not going into the details of the applications, but brief facts of the same. The application is divided into two tiers (actually three, but the third tier is the database (SQL SERVER) so that is not included). The top tier (or first tier) is a web application (ASP.NET) where the users shall log into the system and use the application. This web application will also access the Database directly. One important activity the users shall do is uploading excel files with various information to the server. Web Application once the upload is successful shall enter the details in the in Database about the upload along with an ID and save the excel file at a location in the server.The Second tier is a VB.NET Application which will run in the server. The application will connect the database and retrieve the list of excel file uploaded by the web application and start processing one excel file after another based on ID. The processing that will be done is very simple: read the excel file, check for certain parameters, do some calculations and insert the whole details into the database. (say some 100 records per excel file)
The server in which the VB.NET Application (Second tier) runs is hosting a serious of services and application which shall run simultaneously including the Database (SQLSERVER), web server. The Database also host tables and database for various other applications. In order to help in the smooth functioning of the system, it has been decided that the VB.NET shall do the processing activity only when the server is idle (including CPU usage is idle). I have searched the Net and found API to get the system Idle status. But the real question is how to pause the processing activity when the system switch from idle mode and continue when it is again back to idle mode. Please note that I am talking about system being idle because no other application is executing any activity except the VB.NET Application.
I have asked questions about this before but my program has came to cross roads where I require more flexibility in my security procedures.At the moment I generate a specific key based on certain details about the system, and I hash this data to file, which ensures it will only run on this system.
However it has now got to the point where I have a need for providing keys which will carry settings for the program within the key. So that if a customer wants an update its the matter of sending an updated key, which will allow certain areas of the program to be unlocked/locked.Obviously I can no longer use the hash, as it can't be decrypted. I am looking to use key encryption system, which will allow to encrypt data within a license key. But obviously it brings the problem of where to store Crypt & decrypt key within the program.
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how to restict the input of a user if im going to accept account e.g.,
View 7 RepliesI have the following Hyperlink as a button:-
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It causes a postback but only executes the onload and prerender sections of code. It totally ignores the following function signature:- Protected Sub loginButton_Click(ByVal sender As Object, ByVal e As EventArgs)
i just don't understand how come my code doesn't work when according to every tutorial that i find in the web, i am actually doing the right thing
<%@ Page Language="VB" MasterPageFile="~/AppMaster.master" Title="Results" AutoEventWireup="true"%>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="ceTe.DynamicPDF" %>
<%@ Import Namespace="ceTe.DynamicPDF.PageElements" %>
<%@ Import Namespace="MySql.Data" %>
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