TextBox.CausesValidation Property
Important
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Gets or sets a value indicating whether validation is performed when the TextBox control is set to validate when a postback occurs.
public:
virtual property bool CausesValidation { bool get(); void set(bool value); };[System.Web.UI.Themeable(false)]
public virtual bool CausesValidation { get; set; }[<System.Web.UI.Themeable(false)>]
member this.CausesValidation : bool with get, setPublic Overridable Property CausesValidation As Booleantrue if validation is performed when the TextBox control is set to validate when a postback occurs; otherwise, false. The default value is false.
- Attributes
Use the CausesValidation property to determine whether validation is performed on both the client and the server when a TextBox control is set to validate when a postback occurs. Page validation determines whether the input controls associated with a validation control on the page all pass the validation rules specified by the validation control.
By default, a TextBox control does not cause page validation when the control loses focus. To set the TextBox control to validate when a postback occurs, set the CausesValidation property to true and the AutoPostBack property to true.
When the value of the CausesValidation property is set to true, you can also use the ValidationGroup property to specify the name of the validation group for which the TextBox control causes validation.
This property cannot be set by themes or style sheet themes. For more information, see ThemeableAttribute and ASP.NET Themes and Skins.
| Product | Versions |
|---|---|
| .NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
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