![]() :) I can only surmise that is due to Global Warming of the threads. NET - How To Video Tutorials by Joe Bolen.Watch how to use the MaskedTextBox and ErrorProvider controls in Visual Basic. Will somehow become "unstable" or something to that effect. Please BEWARE that I have NO EXPERIENCE and NO EXPERTISE and probably onset of DEMENTIA which may affect my answers! Also, I've been told by an expert, that when you post an image it clutters up the thread and mysteriously, over time, the link to the image Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.ClickĮrrorProvider1.Icon = Icon.FromHandle(DirectCast(EPImage1, Bitmap).GetHicon())ĮrrorProvider1.Icon = Icon.FromHandle(DirectCast(EPImage2, Bitmap).GetHicon())ĮrrorProvider1.Icon = Icon.FromHandle(DirectCast(EPImage3, Bitmap).GetHicon())ĮrrorProvider1.SetIconAlignment(Button1, ErrorIconAlignment.MiddleRight)ĮrrorProvider1.SetIconPadding(Button1, 2)ĮrrorProvider1.BlinkStyle = .AlwaysBlinkĮrrorProvider1.SetError(Button1, ErrorInfo) Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.LoadĮPImage1 = Image.FromFile("C:\Users\John\Documents\Visual Studio 2012\Control - ErrorProvider - Change Icon\Stop.Ico")ĮPImage2 = Image.FromFile("C:\Users\John\Documents\Visual Studio 2012\Control - ErrorProvider - Change Icon\Warning.Ico")ĮPImage3 = Image.FromFile("C:\Users\John\Documents\Visual Studio 2012\Control - ErrorProvider - Change Icon\OK.Ico") I didn't try it but I would guess you could add the Icons as resources in your applications properties and create images of them from My.Resources.ResourceName instead of creating images of them from files. When the error icon is displayed, point at it with the mouse pointer to see the error text.How can I change an ErrorProvider's backcolor, perhaps as a way to indicate the severity of the error or to categorize the error?ĭo like Frank says. Type invalid (in this example, non-numeric) data into the first control, and then tab to the second. System::ComponentModel::CancelEventHandler (Visual C#, Visual C++) Place the following code in the form's constructor to register the event handler. System::ComponentModel::CancelEventArgs ^ e)ĮrrorProvider1->SetError(textBox1, "Not an integer value.") Releases all resources used by the Component. Creates an object that contains all the relevant information required to generate a proxy used to communicate with a remote object. Clears all settings associated with this component. System::Void textBox1_Validating(System::Object ^ sender, Gets a value indicating whether a control can be extended. Protected void textBox1_Validating (object sender,ĮrrorProvider1.SetError(textBox1, "Not an integer value.") Imports DevExpress.XtraTab Imports Imports Imports Public Class Validation Region ' Public Shared Methods' Public Shared Function FormIsValid(ByRef objForm As Form) As Boolean Dim Valid As Boolean True Validate(objForm, objForm. Private Sub TextBox1_Validating(ByVal Sender As Object, _īyVal e As ) Handles _ĮrrorProvider1.SetError(TextBox1, "Not a numeric value.") The second argument is the error text to display. The first argument of the SetError method specifies which control to display the icon next to. The following code tests the validity of the data the user has entered if the data is invalid, the SetError method is called. For more information, see How to: Create Event Handlers at Run Time for Windows Forms. ErrorProvider allows us to set an error message for any control on the form when the input is not valid. In order for this code to run properly, the procedure must be connected to the event. ![]() Select the first control and add code to its Validating event handler. To display an error icon when a control's value is invalidĪdd two controls - for example, text boxes - to a Windows Form.Īdd an ErrorProvider component to the form. You must have at least two controls on the form in order to tab between them and thereby invoke the validation code. You can use a Windows Forms ErrorProvider component to display an error icon when the user enters invalid data.
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