ValidatorCollection.Contains(IValidator) 方法

定义

命名空间:

System.Web.UI

程序集:

System.Web.dll

确定指定的验证服务器控件是否包含在页的 ValidatorCollection 集合内。

public:
 bool Contains(System::Web::UI::IValidator ^ validator);

public bool Contains (System.Web.UI.IValidator validator);

member this.Contains : System.Web.UI.IValidator -> bool

Public Function Contains (validator As IValidator) As Boolean

参数

validator

IValidator

要检查的验证服务器控件。

返回

Boolean

如果验证服务器控件位于集合中，则为 true；否则为 false。

示例

下面的代码示例演示如何使用 Contains 方法。

Controls.Add(myForm);
myForm.Controls.Add(myLabel1);
myForm.Controls.Add(myTextBox);
myForm.Controls.Add(myButton);
this.Validators.Add(myRequiredFieldValidator);
myForm.Controls.Add(myLabel);

// Remove the RequiredFieldValidator.
if(Validators.Contains(myRequiredFieldValidator))
{
   this.Validators.Remove(myRequiredFieldValidator);
   Response.Write("RequiredFieldValidator is removed from ValidatorCollection<br>");
   Response.Write("ValidatorCollection count after removing the Validator: "+Validators.Count+"<br>");
}
else
{
   Response.Write("ValidatorCollection does not contain RequiredFieldValidator");
}

 Controls.Add(myForm)
 myForm.Controls.Add(myLabel1)
 myForm.Controls.Add(myTextBox)
 myForm.Controls.Add(myButton)
 Me.Validators.Add(myRequiredFieldValidator)
 myForm.Controls.Add(myLabel)

' Remove the RequiredFieldValidator.
 If Validators.Contains(myRequiredFieldValidator) Then
    Me.Validators.Remove(myRequiredFieldValidator)
    Response.Write("RequiredFieldValidator is removed from ValidatorCollection<br>")
    Response.Write("ValidatorCollection count after removing the Validator: " + Validators.Count.ToString() + "<br>")
 Else
    Response.Write("ValidatorCollection does not contain RequiredFieldValidator")
 End If

另请参阅

• IValidator
• Validators