IValidator.IsValid Vlastnost

Definice

Obor názvů:
System.Web.UI
Sestavení:
System.Web.dll

Při implementaci třídou získá nebo nastaví hodnotu určující, zda uživatel zadaný obsah v zadaném ovládacím prvku projde ověření.

public:
 property bool IsValid { bool get(); void set(bool value); };
public bool IsValid { get; set; }
member this.IsValid : bool with get, set
Public Property IsValid As Boolean

Hodnota vlastnosti

Boolean

trueje-li obsah platný; v opačném případě . false

Příklady

Important

Tento příklad obsahuje textové pole, které přijímá vstup uživatele, což je potenciální bezpečnostní hrozba. Ve výchozím nastavení ASP.NET webové stránky ověřují, že vstup uživatele neobsahuje skripty ani elementy HTML. Další informace naleznete v tématu Přehled zneužití skriptů.

<!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>

Platí pro

Viz také