Page.RegisterHiddenField(String, String) Page.RegisterHiddenField(String, String) Page.RegisterHiddenField(String, String) Page.RegisterHiddenField(String, String) Method

定義

警告

此 API 現已淘汰。

允許伺服器控制項自動在表單上登錄隱藏欄位。Allows server controls to automatically register a hidden field on the form. 在呈現 Page 伺服器控制項時,會將此欄位傳送到 HtmlForm 物件。The field will be sent to the Page object when the HtmlForm server control is rendered.

public:
 virtual void RegisterHiddenField(System::String ^ hiddenFieldName, System::String ^ hiddenFieldInitialValue);
[System.Obsolete("The recommended alternative is ClientScript.RegisterHiddenField(string hiddenFieldName, string hiddenFieldInitialValue). http://go.microsoft.com/fwlink/?linkid=14202")]
public virtual void RegisterHiddenField (string hiddenFieldName, string hiddenFieldInitialValue);
abstract member RegisterHiddenField : string * string -> unit
override this.RegisterHiddenField : string * string -> unit
Public Overridable Sub RegisterHiddenField (hiddenFieldName As String, hiddenFieldInitialValue As String)

參數

hiddenFieldName
String String String String

要呈現的隱藏欄位之唯一名稱。The unique name of the hidden field to be rendered.

hiddenFieldInitialValue
String String String String

要在隱藏表單中發出的值。The value to be emitted in the hidden form.

範例

下列程式碼範例會使用RegisterHiddenField方法來協助建立 ECMAScript 程式碼,並傳遞給要求的瀏覽器。The following code example uses the RegisterHiddenField method to help create ECMAScript code that is passed to the requesting browser. 隱藏欄位的名稱會設定為myHiddenField ,而且其值會設定為「歡迎使用 Microsoft!」The name of the hidden field is set to myHiddenField and its value is set to "Welcome to Microsoft!" RegisterStartupScript使用者按一下頁面myHiddenField上的按鈕時,方法會呼叫值。The RegisterStartupScript method calls the myHiddenField value when the user clicks a button on the page.

重要

這個範例有一個隱藏欄位,這是潛在的安全性威脅。This example has a hidden field, which is a potential security threat. 根據預設,您應該驗證隱藏欄位的值,就像是文字方塊的值一樣。By default, you should validate the value of a hidden field as you would the value of a text box. ASP.NET 網頁會驗證使用者輸入不包含腳本或 HTML 元素。ASP.NET Web pages validate that user input does not include script or HTML elements. 如需詳細資訊,請參閱 Script Exploits Overview (指令碼攻擊概觀)。For more information, see Script Exploits Overview.

void Page_Load(Object sender, EventArgs e) 
{ 
   String scriptString = "<script language=\"JavaScript\"> function doClick() {";
   scriptString += "document.write('<h4>' + myForm.myHiddenField.value+ '</h4>');}<";
   scriptString += "/" + "script>";
      
   RegisterHiddenField("myHiddenField", "Welcome to Microsoft!"); 
   
   RegisterOnSubmitStatement("submit", "document.write('<h4>Submit button clicked.</h4>')"); 
   
   RegisterStartupScript("startup", scriptString);
} 

     Dim scriptString As String = "<script language=""JavaScript""> function doClick() {"
scriptString += "document.write('<h4>' + myForm.myHiddenField.value+ '</h4>');}<"
scriptString += "/" + "script>"
   
RegisterHiddenField("myHiddenField", "Welcome to Microsoft!")

RegisterOnSubmitStatement("submit", "document.write('<h4>Submit button clicked.</h4>')")

RegisterStartupScript("startup", scriptString)

備註

RegisterHiddenField 方法已被取代。The RegisterHiddenField method has been deprecated. 在類別中使用RegisterHiddenField方法 ClientScriptManagerUse the RegisterHiddenField method in the ClientScriptManager class.

適用於

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