Step 1 The first step is to drag the button control onto the Windows Form from the toolbox as shown below. Step 2 Once the Button has been added, go to the properties window by clicking on the Button control. Congrats, you now have your first basic Windows Form in place. When working with windows form, you can add events to controls. An event is something that happens when an action is performed. Probably the most common action is the clicking of a button on a form.
In C Windows Forms, you can add code which can be used to perform certain actions when a button is pressed on the form. The below example will showcase an event for the Listbox control. So whenever an item is selected in the listbox control, a message box should pop up which shows the item selected. Step 1 Double click on the Listbox in the form designer.
By doing this, Visual Studio will automatically open up the code file for the form. And it will automatically add an event method to the code. This event method will be triggered, whenever any item in the listbox is selected. Above is the snippet of code which is automatically added by Visual Studio, when you double-click the List box control on the form. One you make the above changes, and run the program in Visual Studio you will see the following output. From the output, you can see that when any item from the list box is selected, a message box will pops up.
This will show the selected item from the listbox. Again this follows the same philosophy. Just double click the button in the Forms Designer and it will automatically add the method for the button event handler.
Then you just need to add the below code. Once you click the Submit button, a message box will pop, and it will correctly show you what you entered in the user details section. Probably the best example is when we see the Windows Explorer itself. The folder structure in Windows Explorer is like a tree-like structure.
Step 1 The first step is to drag the Tree control onto the Windows Form from the toolbox as shown below. Step 2 The next step is to start adding nodes to the tree collection so that it can come up in the tree accordingly. Step 3 The next step is to start adding the child nodes to the tree collection. Kith Black. Kith Black Kith Black 1 3 3 bronze badges. Did this not help you if you are saying that you researched it [ code.
Can you explain the scenario, where you need this in service for client, or standalone. Also provide the snippet of code which you have tried already. The link you've posted doesn't exist.
Add a comment. Active Oldest Votes. Considering you need a standalone application for windows authentication. The LoginView's templates can be defined from the Designer or the declarative markup. From Visual Studio's Designer, expand the LoginView's smart tag, which lists the configured templates in a drop-down list. The LoginName control , as its name implies, displays the name of the currently logged in user. Internally, the LoginName control simply outputs the User. Name property.
After making these additions to the LoginView's templates, the markup should look similar to the following:. With this addition to the Site. Figure 15 shows the Default. The "Welcome back, Jisun" message is repeated twice: once in the master page's navigation section on the left via the LoginView control we just added and once in the Default.
Because we added the LoginView to the master page, it can appear in every page on our site. However, there may be web pages where we don't want to show this message. One such page is the login page, since a link to the login page seems out of place there. Since we placed the LoginView control in a ContentPlaceHolder in the master page, we can override this default markup in our content page.
Open Login. Since we have not explicitly defined a Content control in Login. To override the default markup for the LoginContent ContentPlaceHolder, simply right-click on the region in the Designer and choose the Create Custom Content option from the context menu.
When using Visual Studio the ContentPlaceHolder includes a smart tag that, when selected, offers the same option. This adds a new Content control to the page's markup and thereby allows us to define custom content for this page. You could add a custom message here, such as "Please log in…", but let's just leave this blank.
NET page. In Visual Studio , however, creating custom content copies the master page's default content into the newly created Content control.
If you are using Visual Studio , then, after creating the new Content control make sure to clear out the content copied over from the master page. Figure 17 shows the Login. In Step 3 we looked at building a login page to log a user in to the site, but we have yet to see how to log a user out. In addition to methods for logging a user in, the FormsAuthentication class also provides a SignOut method. The SignOut method simply destroys the forms authentication ticket, thereby logging the user out of the site.
Offering a log out link is such a common feature that ASP. NET includes a control specifically designed to log a user out. A "Login" LinkButton is rendered for anonymous users, whereas a "Logout" LinkButton is displayed to authenticated users.
Clicking the "Login" LinkButton causes a postback, from which a redirect is issued to the login page. SignOff method and then redirects the user to a page. The page the logged off user is redirected to depends on the LogoutAction property, which can be assigned to one of the three following values:. You may be curious as to why a redirect is performed here. If the user wants to remain on the same page, why the need for the explicit redirect?
The reason is because when the "Logoff" LinkButton is clicked, the user still has the forms authentication ticket in their cookies collection. Consequently, the postback request is an authenticated request. Therefore, an explicit redirect causes the browser to re-request the page.
By the time the browser re-requests the page, the forms authentication ticket has been removed and therefore the incoming request is anonymous.
Let's add a LoginStatus control to the master page and configure it to use the Redirect option to send the user to a page that displays a message confirming that they have been signed out. Start by creating a page in the root directory named Logout. Don't forget to associate this page with the Site. Next, enter a message in the page's markup explaining to the user that they have been logged out.
Next, return to the Site. Figure 18 shows Default. Note that the left column displays the message, "Welcome back, Jisun" along with a link to log out. Clicking the log out LinkButton causes a postback, signs Jisun out of the system, and then redirects her to Logout.
As Figure 19 shows, by the time Jisun reaches Logout. Consequently, the left column shows the text "Welcome, stranger" and a link to the login page.
Figure 18 : Default. Figure 19 : Logout. I encourage you to customize the Logout. The reason is because the "Login" LinkButton rendered by the LoginStatus control the one beneath "Hello, stranger" sends the user to the login page passing the current URL in the ReturnUrl querystring parameter.
In short, if a user who has logged out clicks this LoginStatus's "Login" LinkButton, and then logs in, they will be redirected back to Logout. In this tutorial we started with an examination of the forms authentication workflow and then turned to implementing forms authentication in an ASP. NET application. Forms authentication is powered by the FormsAuthenticationModule, which has two responsibilities: identifying users based on their forms authentication ticket, and redirecting unauthorized users to the login page.
NET Framework's FormsAuthentication class includes methods for creating, inspecting, and removing forms authentication tickets. IsAuthenticated property and User object provide additional programmatic support for determining whether a request is authenticated and information about the user's identity.
There are also the LoginView, LoginStatus, and LoginName Web controls, which give developers a quick, code-free way for performing many common login-related tasks. We will examine these and other login-related Web controls in greater detail in future tutorials.
This tutorial provided a cursory overview of forms authentication. We did not examine the assorted configuration options, look at how cookieless forms authentication tickets work, or explore how ASP.
NET protects the contents of the forms authentication ticket. Scott works as an independent consultant, trainer, and writer. He can be reached at mitchell 4GuysFromRolla.
This tutorial series was reviewed by many helpful reviewers. Lead reviewer for this tutorial was This tutorial series was reviewed by many helpful reviewers.
Interested in reviewing my upcoming MSDN articles? If so, drop me a line at mitchell 4GuysFromRolla. Previous Next. Search related threads.
Remove From My Forums. Answered by:. Archived Forums. Visual C. Sign in to vote. Can you anyone pls. Getting error when i use SQL server Authentication.
0コメント