The ErrorProvider component's key properties are DataSource, ContainerControl, and Icon. The setError method sets the error description string for the specified control. This is done using the "setError ()" method. In the "txt_nameValidating ()" event, if txt_name is left empty then it shows error. ageErrorProvider.SetError(Me.ageUpDownPicker, "Age is too old") Else ' Clear the error, if any, in the error provider. errorprovider seterrorĪgeErrorProvider.SetError(Me.ageUpDownPicker, "Age not old enough") ElseIf IsAgeTooOld() Then ' Set the error if the age is too old. The ErrorProvider component displays an error icon ( ) next to the relevant control, such as a text box when the user positions the mouse pointer over the error icon, a ToolTip appears, showing the error message string. Private Sub TextBox1_Validating (ByVal Sender As Object, _ ByVal e As ) Handles _ TextBox1.Validating If Not IsNumeric (TextBox1.Text) Then ErrorProvider1.SetError (TextBox1, "Not a numeric value.") Else ' Clear the error.Īn error provider is a better alternative than displaying an error message in a message box, because once a message box is dismissed, the error message is no longer visible.
The second argument is the error text to display. public void SetError ( control, string value) member this.SetError : * string -> unit. public: void SetError (System::Windows::Forms::Control ^ control, System::String ^ value) C#. Sets the error description string for the specified control. It is an abstraction that shows errors on your form.Ĭlears all settings associated with this component. ErrorProvider simplifies and streamlines error presentation. The string specified in the second argument in the function invocation is displayed as the tooltip when the mouse is moved over the Error indicator.Ĭ# ErrorProvider Control: Windows Forms Use the ErrorProvider control in Windows Forms to display errors in user input. Invoking the SetError method of the ErrorProvider control displays an error indicator image next to the control specified as the first argument to the SetError method. The icon flashes in the manner specified by BlinkStyle, at the rate specified by BlinkRate. If an error description string is specified for the control, an icon appears next to the control. error provider c#ĮrrorProvider presents a simple mechanism for indicating to the end user that a control on a form has an error associated with it. This example requires that a TextBox and ErrorProvider control have been created on a form. If the email address is not in the standard format (containing and "."), the validation fails, an ErrorProvider icon is displayed, and the event is canceled. Next: You can change properties on the ErrorProvider instance by right-clicking on it and selecting Properties. This will insert the errorprovider1 into the tray at the bottom of the screen. Nguyễn Minh Vượng 17,866 views 6:39 5.16 Error not available right now.įind and double-click on the ErrorProvider icon. Help an organization be more nimble and return to its startup-like roots. Up next Create Login Window in Windows Forms Application Validation Errorprovider has entered if the data is invalid, the SetError method is called. If the user hovers the mouse over the error icon, then it Thanks. Remove Errorprovider Icon When Error Is Corrected. Be mindful of what ErrorProvider instance you are clearing. When the error icon is displayed, point at it with the mouse pointer to see the error text.ĮrrorProvider.Clear () will remove the icon from the form. Type invalid (in this example, non-numeric) data into the first control, and then tab to the second. errorprovider icon when error is corrected += new System.EventHandler(this.OnButtonStartClick) (()(this.numericUpDownColors)).BeginInit() (()(this.errorProviderWrongButton)).BeginInit() This.errorProviderWrongButton = new (ponents) / the contents of this method with the code editor. / Required method for Designer support - do not modify #region Windows Form Designer generated code Protected override void Dispose(bool disposing) / true if managed resources should be disposed otherwise, false. IList Reaktionszeitliste = new List() ", _ReactionTimes.Last().TotalSeconds, _ReactionTimes.Min().TotalSeconds, _ReactionTimes.Max().TotalSeconds)
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