Any additional feedback? Note The exceptions to this are when the control with focus is another button — in that case, the button with the focus will be clicked — or a multiline text box, or a custom control that traps the ENTER key. Submit and view feedback for This product This page. View all page feedback. Just wait and set the value of DialogResult when it's validated, not every time. Patrick: It does not mean you set the dialogresult value. When you press the cancel button the framework does that for you, that, changes the DialogResult 's state for you.
Try it. But it still means that the DialogResult on the form is set to that of the Button, even if you don't set it explicitly yourself, which leads to a few extra calls that should be unnecessary.
And as a side note, if you have DialogResult set on the button you don't need to call this. Close on the form. You can set the DialogResult property of your form in your validation code instead. Patrick Patrick 17k 5 5 gold badges 68 68 silver badges 83 83 bronze badges.
I was trying this approuch previously however this code doesn't work. If I click Ok button and validation returns true nothing happen, however if I click button Ok once more, form close itself. Does it not go into validation?
When you are done validating, can you not set DialogResult of the form to DialogResult. OK and have the Form close itself? I mean that form does't close even if validation returns true. Unofrtunatelly I can't resign from seting DialorResult. OK — exMode.
But when the validation returns true, why can't you set the value of DialogResult? I do not understand what you mean by "I can't resign from seting", would you please rephrase? I set the dialogResult. CreateParams cp. All Rights Reserved. Gets or sets the button control that is clicked when the user presses the ESC key. Gets or sets the border style of the form. This is because we want to put the stress on the server, with most of the logic placed in it, which would finally lead to a single reusable server class.
IDefaultButtonsRule also provides the Key property, which should uniquely identify the rule within all the rules added to the server, so that it can be referenced later. Note that ApplyRule event provides ApplyRuleEventArgs as argument, which exposes three properties: button control reference and two Boolean flags, first indicating whether accept or cancel button is affected, and second property specifying whether default button should be set to new value or reset to previous value.
Another class is FocusListButtonsRule, which operates on a given list control and sets accept button when list control is focused and item is selected. It also sets accept button to null when list control is focused but no item is selected. That will ensure that manager object finds out all clients contained in the form, and collects all rules from them. Further on, it subscribes to ControlAdded and ControlRemoved events on all contained controls, so that all clients dynamically added to the form may be recognized later at run time and questioned to register their rules as well.
This strategy ensures that using this manager is quite simple, while all the complex details are hidden within its internal logic. The following section will provide an example which demonstrates how easy it is to use this complete architecture on a practical case.
Example We will demonstrate use of classes presented in this article on an example of a form which contains couple of controls. One of the child controls is a user control which further on has its own child controls. The following picture shows the form. Text box with associated button is used to enter path to the file. List box controls with two associated buttons are actually a single user control which operates on its own.
Rules for AcceptButton and CancelButton property values on the form are these:. To implement these rules, one would have to handle Enter and Leave events on the text box and to modify the user control in order to implement similar logic in it. Instead of doing so, programmer might plan these activities in advance, and then to implement IDefaultButtonsClient interface both in the form and in the user control. In addition, form had to instantiate the default buttons manager object and to provide it with reference to self as the last line in the constructor - this ensures that all child controls have already been created, which simplifies rules registration code reducing it to total of three lines of code in this case.
Result of this modification is that AcceptButton property on the form is now a function of particular contents of the form, as well as of currently focused control.
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