The assigned value is not one of the values. Gets or sets a value indicating when the error icon flashes. The rate, in milliseconds, at which the error icon should flash. Gets or sets the rate at which the error icon flashes. and, you should use instead of setting and individually. Provides a method to set both the and at run time. Typically, this is a to be monitored for errors.Ī collection within the to monitor for errors. specified by is the container object for the data-bound controls to associate the error provider with.Ī data set based on the interface to be monitored for errors. Initializes a new instance of the class attached to a container. The container of the control to monitor for errors. specified is the container object for the data-bound controls to associate the error provider with. Initializes a new instance of the class attached to an implementation. ||An icon that consists of an exclamation point in a circle with a red background| Initializes a new instance of the class and initializes the default settings for, , and the. :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_Winforms/Classic ErrorProvider Example/VB/source.vb" id="Snippet1"::: :::code language="csharp" source="~/snippets/csharp//ErrorProvider/Overview/source.cs" id="Snippet1"::: :::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms/Classic ErrorProvider Example/CPP/source.cpp" id="Snippet1":::
ERRORPROVIDER CLEAR HOW TO
The following code example shows how to use the with a and to indicate a data error to the user. :::code language="vb" source="~/snippets/visualbasic/VS_Snippets_Winforms//VB/errorproviderexample.vb" id="Snippet1"::: :::code language="csharp" source="~/snippets/csharp//ErrorBlinkStyle/Overview/errorproviderexample.cs" id="Snippet1"::: :::code language="cpp" source="~/snippets/cpp/VS_Snippets_Winforms//CPP/errorproviderexample.cpp" id="Snippet1"::: The method is called with or without appropriate error text during a control's event, depending upon the content in the control. The example sets error icon options using the and properties and the and methods. The example creates a that contains a control, a control, and a control, each validating its content, and an for each control. The following code example demonstrates using the class to notify the user of a data entry error. To make your application accessible when using this component, you must provide an additional, accessible feedback mechanism. > The component does not provide built-in support for accessibility clients. When using with data-bound controls, you must specify the, either in the constructor or by setting the property. Typically, you use in association with data-bound controls. When the mouse hovers over the icon, a ToolTip appears showing the error description string. The icon flashes in the manner specified by, at the rate specified by. If an error description string is specified for the control, an icon appears next to the control. presents a simple mechanism for indicating to the end user that a control on a form has an error associated with it. (You can set the error to the control by name, or generically by using the sender argument.Provides a user interface for indicating that a control on a form has an error associated with it. If the input is not valid, we set the error shown by the ErrorProvider (the e.Message is generally the same as the Message parameter of any exception that has been thrown). We also clear any errors in the ErrorProvider (not sure of the best way to use this control, but this works). In that event handler, we check if the input is valid (don't know what all that does, but it works - play with it) and, if so, cast the value to the correct data type in order to use for some purpose. The example shows us setting the type of data which should be entered into the text box and then subscribing to the corresponding event. It's really useful when combined with the above data validation method. The ErrorProvider is a WinForms control that allows you to show a red exclamation mark with an error message tooltip next to a control. When the mask is blank, you can accept input just like you can with a TextBox.
What you should be aware of, though, is that the Mask is *not* required.
If you want to read about the MaskedTextBox, it's all on MSDN. If you do this, as well as subscribe to the TypeValidationCompleted event, on the form Load event, you can handle user validation inside your TypeValidationCompleted event handler. The trick is to set the ValidatingType of the MaskedTextBox control to the type of data you want to get from the user. I just discovered that the MaskedTextBox control allows you to set the type of data which should be entered in the control and helps you do the validation of that data when necessary.
0 kommentar(er)
