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IValidator.Validate Método

Definición

Cuando la implementa una clase, evalúa la condición que comprueba y actualiza la propiedad IsValid.

public:
 void Validate();
public void Validate ();
abstract member Validate : unit -> unit
Public Sub Validate ()

Ejemplos

Importante

Este ejemplo tiene un cuadro de texto que acepta datos proporcionados por el usuario, lo que puede suponer una amenaza para la seguridad. De forma predeterminada, ASP.NET Web Pages valida que los datos proporcionados por el usuario no incluyen elementos HTML ni de script. Para más información, consulte Información general sobre los ataques mediante scripts.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
  <head>
    <title>IValidator Example demonstrating IsValid & ErrorMessage</title>
<script language="C#" runat="server">

     void Button_Click(Object sender, EventArgs e)
     {
        // Generating the random number.
        Random rand_s = new Random();
        myCompareValidate.ValueToCompare = rand_s.Next(1, 10).ToString();

        // Setting the ErrorMessage.
        myCompareValidate.ErrorMessage="Try Again!!";
        myCompareValidate.Validate();

        // Check for Validity of control.
        if ((myCompareValidate.IsValid) && (myTextBox.Text != ""))
        {
           labelOutput.Text = "You guessed correctly!!";
           labelOutput.ForeColor = System.Drawing.Color.Blue;
        }
        else
        {
           labelOutput.Text =  "You guessed poorly";
           labelOutput.ForeColor = System.Drawing.Color.Black;
        }

        labelOutput.Text += "<br /><br />" + "The number is: " +
           myCompareValidate.ValueToCompare;
     }

  </script>
</head>
    <body>
      <form runat="server" id="myForm">
        <h3>IValidator Example demonstrating IsValid & ErrorMessage</h3>
        <h5>Guess!! a number between 1 and 10 :</h5>
        <asp:TextBox id="myTextBox" runat="server" />
        <asp:CompareValidator id="myCompareValidate"
             ControlToValidate="myTextBox" ValueToCompare="0"
             EnableClientScript="False" Type="Integer" Text="*"
             runat="server" />
        <br />
        <asp:Button Text="Submit" OnClick="Button_Click" runat="server" />
        <br />
        <asp:Label id="labelOutput" runat="server" />
        <br />
        <asp:ValidationSummary id="Summary1" runat="server" />
     </form>
  </body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
   <head>
    <title>IValidator Example demonstrating IsValid & ErrorMessage</title>
<script language="VB" runat="server">

         Sub Button_Click(sender As [Object], e As EventArgs)
            ' Generating a random number.
            Dim rand_s As New Random()
            myCompareValidate.ValueToCompare = rand_s.Next(1, 10).ToString()

            ' Set the ErrorMessage.
            myCompareValidate.ErrorMessage = "Try Again!!"
            myCompareValidate.Validate()

            ' Check for Validity of control.
            If myCompareValidate.IsValid And myTextBox.Text <> "" Then
               labelOutput.Text = "You guessed correctly!!"
               labelOutput.ForeColor = System.Drawing.Color.Blue
            Else
               labelOutput.Text = "You guessed poorly"
               labelOutput.ForeColor = System.Drawing.Color.Black
            End If

            labelOutput.Text += "<br /><br />" + "The number is: " + _
               myCompareValidate.ValueToCompare
         End Sub 'Button_Click

  </script>
</head>
    <body>
       <form runat="server" id="myForm">
          <h3>IValidator Example demonstrating IsValid & ErrorMessage</h3>
          <h5>Guess!! a number between 1 and 10:</h5>
          <asp:TextBox id="myTextBox" runat="server" />
          <asp:CompareValidator id="myCompareValidate"
               ControlToValidate="myTextBox" ValueToCompare="0"
               EnableClientScript="False" Type="Integer" Text="*"
               runat="server" />
          <br />
          <asp:Button Text="Submit" OnClick="Button_Click" runat="server" />
          <br />
          <asp:Label id="labelOutput" runat="server" />
          <br />
          <asp:ValidationSummary id="Summary1" runat="server" />
       </form>
    </body>
</html>

Se aplica a

Consulte también