Error Message Box Vb.net
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How to create an error message box for an empty text box: VB 2010 Express up vote 2 down vote favorite I am taking VB this semester, and while it is not required for this particular assignment, I am curious how I can create a MessageBox error if a text box is left empty. We just covered using the Try/Catch statement, and I have successfully created MessageBoxes for text boxes whose text is only numeric. For example, a user must enter a name, and two numeric amounts. I am trying to create an error if the Name text box is left empty, stop the program from calculating the two amounts and return the insertion point to the Name text box. Is there an easier way to do this? The If/Then statement I currently have does not stop the program from calculating (I am just starting out so go easy on me): Private Sub CalculateButton_Click(sender As System.Object, e As System.EventArgs) Handles CalculateButton.Click 'Declare Variables Dim SellingPrice, CostValue, Commission As Decimal 'Test to see if a name was provided the NameTextBox If NameTextBox.Text = "" Then MessageBox.Show("Please enter a Salesperson's name", "No entry", MessageBoxButtons.OK, MessageBoxIcon.Error) With NameTextBox .Focus() .SelectAll() End With End If 'Test if Numerical data was entered for SellingPriceTextBox Try 'Convert Selling Price SellingPrice = Decimal.Parse(SellingPriceTextBox.Text) 'Test if Numerical data was entered for CostValueTextBox Try 'Convert Cost Value CostValue = Decimal.Parse(CostValueTex
resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards Events Community Magazine Forums Blogs Channel 9 Documentation APIs and reference Dev centers Retired content Samples We’re sorry. The content you requested has been removed. You’ll be auto redirected in 1 second. Exception and Error Handling in Visual Basic Structured Exception Handling in Visual Basic Exception Handling Tasks (Visual Basic) Exception Handling Tasks (Visual Basic) How to: Display an Exception's Message in Visual Basic How to: Display an Exception's Message in Visual Basic How to: Display an http://stackoverflow.com/questions/18862674/how-to-create-an-error-message-box-for-an-empty-text-box-vb-2010-express Exception's Message in Visual Basic How to: Catch an Exception in Visual Basic How to: Throw an Exception in Visual Basic How to: Implement I/O Try...Catch Blocks in Visual Basic How to: Test Code with a Try…Catch Block in Visual Basic How to: Clean up Resources with a Try…Finally Block in Visual Basic How to: Filter Errors in a Catch Block in Visual Basic https://msdn.microsoft.com/en-us/library/cbc51cdy(v=vs.100).aspx How to: Display an Exception's Message in Visual Basic How to: Create New Exception Classes in Visual Basic How to: Check an Exception's Inner Exception (Visual Basic) TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. How to: Display an Exception's Message in Visual Basic Visual Studio 2010 Other Versions Visual Studio 2008 Visual Studio 2005 The exception object includes a number of properties that help identify the code location, the type, the Helpfile URL, and the reason for the exception. One of these, the Message property, describes the current exception.To display the string associated with an exceptionUse the Message property to display information about the current exception. This example catches a WebException and displays the associated message. VB Copy Try Throw New System.Net.WebException Catch ex As System.Net.WebException MsgBox("An exception occurred:" & vbCrLf & ex.Message) End Try See AlsoTasksHow to: Catch an Exception in Visual BasicHow to: Throw an Exception in Visual BasicHow to: Test Code with a Try…Catch Block in Visual BasicHow to: Check an Exception's Inner Exception (Visual Basic)Trou
Выбрать другой язык можно в списке ниже. Learn more You're viewing YouTube in Russian. You can change https://www.youtube.com/watch?v=J4LGh02Txh4 this preference below. Закрыть Да, сохранить http://www.visual-basic-tutorials.com/beginner/Message-Box-Dialog.html Отменить Закрыть Это видео недоступно. Очередь просмотраОчередьОчередь просмотраОчередь Удалить всеОтключить Загрузка... Очередь просмотра Очередь __count__/__total__ How To: Make an Error Message Box in Visual Basic 2010 Express|HD| error message ihackedurgames ПодписатьсяПодписка оформленаОтменить подписку205205 Загрузка... Загрузка... Обработка... Добавить в Хотите сохраните это видео? Войдите в аккаунт и добавьте его в плейлист. Войти Поделиться Ещё Пожаловаться Пожаловаться на видео? Выполните вход, чтобы сообщить о неприемлемом контенте. error message box Войти Статистика 5 800 просмотров 13 Понравилось? Войдите в аккаунт, чтобы поставить отметку. Войти 14 2 Не понравилось? Войдите в аккаунт, чтобы поставить отметку. Войти 3 Загрузка... Загрузка... Загрузка... Оценка становится доступна после аренды видео- В данный момент эта функция недоступна. Повторите попытку позже. Дата загрузки: 28 окт. 2011 г.Make an Error Message Box in Visual Basic 2010 Express Категория Наука и техника Лицензия Стандартная лицензия YouTube Ещё Свернуть Загрузка... Реклама Автовоспроизведение Если функция включена, то следующий ролик начнет воспроизводиться автоматически. Следующее Visual Basic - Error Handling with the "Try Catch" block - Продолжительность: 9:15 PJG Creations Ltd - IT Consultan
MessageBox dialog and demonstrates how you can use it in your Visual Basic applications. MessageBox is one of these built-in dialog boxes that help you to provide a rich user interface in your front-end applications. As a developer you will use this dialog pretty often as it lets you to display custom messages to your users and accept their input regarding the choice that they have made. It's very flexible and provide many properties and methods that enable you to customize them to suit your needs. You can customize it to display a variety of icons with your messages and choose which buttons to display while still maintaining the standard look of Windows Forms application. The MessageBox suports the following standard icons: MEMBER ICON Asterisk Information Icon Information Information Icon Error Error Icon Hand Error Icon Stop Error Icon Exclamation Exclamation Icon Warning Exclamation Icon Question Question Icon None Will not display any icon It also supports the following combinations of buttons: MEMBER DESCRIPTION AbortRetryIgnore Abort, Retry, and Ignore buttons OK an OK button OKCancel OK and Cancel buttons RetryCancel Retry and Cancel buttons YesNo Yes and No buttons YesNoCancel Yes, No, and Cancel buttons To display the message box you call its Show method which by the way, cannot be inherited because it's shared so the only way to change the default MessageBox behaviour is using windows hooks. MessageBox.Show( "The username or password you entered is incorrect", _ "Login Error", MessageBoxButtons.OKCancel, MessageBoxIcon.Stop) Get the message box response clicked by user: You can get the response of the message box clicked by the user (Yes, No, Cancel, etc) by using the following code: Dim msgRslt As MsgBoxResult = MsgBox("Are you 21 years old or older?.", MsgBoxStyle.YesNo) If msgRslt = MsgBoxResult.Yes Then MsgBox("You are welcome to join.") ElseIf msgRslt = MsgBoxResult.No Then MsgBox("You must be at least 21 years old to join.") End If Previous Lesson | Next Lesson Share This Please enable JavaScript to view the comments powered by Disqus. Subscribe Get updates to your email. More TutorialsSystem Tray - Notification Area - Visual Basic .NETWrite to a Text File - Visual Basic .NETChanging Controls Properties in Visual Basic .NETDo Until Loop in Visual Basic .NETVisual Basic .NET CommentsOpenFileDialog in Visual Basic .NET Fu