Inherited from Label. Gets or sets the tab index of the Web server control. Gets the name of the control tag. Gets or sets a reference to the template that contains this control. Gets or sets the text displayed in the validation control when validation fails.
Gets or sets the text displayed when the mouse pointer hovers over the Web server control. Gets the unique, hierarchically qualified identifier for the server control. Gets or sets the name of the validation group to which this validation control belongs. Gets or sets the view-state mode of this control. Gets or sets a value that indicates whether a server control is rendered as UI on the page.
Gets or sets the width of the Web server control. AddedControl Control, Int AddParsedSubObject Object. ApplyStyle Style. ApplyStyleSheetSkin Page. Applies the style properties defined in the page style sheet to the control. Begins design-time tracing of rendering data. BuildProfileTree String, Boolean. Verifies whether the specified control is on the page and contains validation properties. Deletes the control-state information for the server control's child controls.
Deletes the view-state information for all the server control's child controls. CopyBaseAttributes WebControl. Binds a data source to the invoked server control and all its child controls. DataBind Boolean. Binds a data source to the server control's child controls. Determines whether the validation control can perform client-side validation. Enables a server control to perform final clean up before it is released from memory.
Ends design-time tracing of rendering data. Creates an identifier for controls that do not have an identifier assigned. Equals Object. Determines whether the specified object is equal to the current object. Inherited from Object. Called during the validation stage when ASP. NET processes a Web Form. FindControl String. FindControl String, Int Sets input focus to a control. Gets the client ID of the specified control.
GetControlValidationValue String. Gets the value associated with the specified input control. Gets design-time data for a control. Serves as the default hash function. GetRouteUrl Object. Gets the URL that corresponds to a set of route parameters.
GetRouteUrl String, Object. Gets the URL that corresponds to a set of route parameters and a route name. Determines if the server control contains any child controls. Returns a value indicating whether events are registered for the control or any child controls. Determines if the server control holds only literal content. LoadControlState Object. LoadViewState Object. Loads the previously saved state for the control. MapPathSecure String.
Retrieves the physical path that a virtual path, either absolute or relative, maps to. MergeStyle Style. OnDataBinding EventArgs. OnInit EventArgs. OnLoad EventArgs. OnPreRender EventArgs. OnUnload EventArgs. My goal is to validate controls without any code! With Validator , you drop it to a form and enter the validation rules for a TextBox or a ComboBox just like using the ToolTip component. I got the afflatus from the following article but implement a different approach.
I suggest you read it:. First, create a new Windows Forms application, and follow these steps to use the Validator component:. If you have strong named Validator assembly and has added it to the GAC, you can choose it in the ". NET Framework components" list. Or else, in the example, click the "Browse" button and locate your Validator.
Drag the Validator which has been added by the first step, and drop it on the form. Its property window should be like:. Now we will assume that there are three TextBox es and one Submit button on the form.
Configure validation info for the controls. The Format event on a data binding can be used to reformat incoming data to comply with the mask, and the Parse event can be used to reformat outgoing data to comply with the specifications of the data field.
If you want full programmatic control over validation, or need complex validation checks, you should use the validation events that are built into most Windows Forms controls. Each control that accepts free-form user input has a Validating event that will occur whenever the control requires data validation.
In the Validating event-handling method, you can validate user input in several ways. For example, if you have a text box that must contain a postal code, you can do the validation in the following ways:. If the postal code must belong to a specific group of zip codes, you can do a string comparison on the input to validate the data entered by the user. If the postal code must be in a specific form, you can use regular expressions to validate the data entered by the user.
For more information about regular expressions, see. If the postal code must be a valid United States Zip code, you could call a Zip code Web service to validate the data entered by the user.
The Validating event is supplied an object of type CancelEventArgs. If you determine that the control's data isn't valid, cancel the Validating event by setting this object's Cancel property to true. If you don't set the Cancel property, Windows Forms will assume that validation succeeded for that control and raise the Validated event.
For a code example that validates an email address in a TextBox , see the Validating event reference. Validation is useful when you have bound your controls to a data source, such as a database table. By using validation, you can make sure that your control's data satisfies the format required by the data source, and that it doesn't contain any special characters such as quotation marks and back slashes that might be unsafe.
When you use data binding, the data in your control is synchronized with the data source during execution of the Validating event. If you cancel the Validating event, the data won't be synchronized with the data source. If you have custom validation that takes place after the Validating event, it won't affect the data binding.
For example, if you have code in a Validated event that attempts to cancel the data binding, the data binding will still occur. Here is an example which uses some ValidateEmail function to check if the text is an e-mail address, sets the background to some red?
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more. Simplest way to perform data validation for fields on Windows Forms Ask Question. Asked 9 years, 1 month ago. Active 2 years, 4 months ago. Viewed 97k times.
K 1, 4 4 gold badges 23 23 silver badges 30 30 bronze badges. When user clicks Calculate, you can check whether the required fields contain required values in expected ranges. If not you can "Show" message accordingly, instructing the user to enter correct values. I'll add a code sample in a minute. CRoshanLG that is what i am doing right now! Was looking for some other way to do it. For instance, take the validation controls we have in ASP.
I feel the validation controls, since they are positioned right next to the input controls help the user immediately understand what he's doing wrong and thereby give him a better experience.
Also no code is run, which saves unnecessary processsing time — R. Add a comment.
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