Page.IsStartupScriptRegistered(String) Page.IsStartupScriptRegistered(String) Page.IsStartupScriptRegistered(String) Page.IsStartupScriptRegistered(String) Method

Definición

Advertencia

Esta API está ya obsoleta.

Determina si el script de inicio del cliente se encuentra registrado con el objeto Page.Determines whether the client startup script is registered with the Page object.

public:
 bool IsStartupScriptRegistered(System::String ^ key);
[System.Obsolete("The recommended alternative is ClientScript.IsStartupScriptRegistered(string key). http://go.microsoft.com/fwlink/?linkid=14202")]
public bool IsStartupScriptRegistered (string key);
member this.IsStartupScriptRegistered : string -> bool
Public Function IsStartupScriptRegistered (key As String) As Boolean

Parámetros

key
String String String String

Clave de cadena del script de inicio que se va a buscar.The string key of the startup script to search for.

Devoluciones

Es true si el script de inicio está registrado; en caso contrario, es false.true if the startup script is registered; otherwise, false.

Ejemplos

En el ejemplo de código siguiente se muestra el RegisterStartupScript uso del método junto con IsStartupScriptRegistered el método.The following code example demonstrates the use of the RegisterStartupScript method in conjunction with the IsStartupScriptRegistered method. Si el ECMAScript escrito en el bloque de declaración de código todavía no se ha registrado, como IsStartupScriptRegisteredse determina en RegisterStartupScript , se realiza una llamada.If the ECMAScript written in the code declaration block has not already been registered, as determined by IsStartupScriptRegistered, then a RegisterStartupScript call is made.

<%@ Page Language="C#"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
  public void Page_Load(Object sender, EventArgs e)
  {
    String csname1 = "PopupScript";
    String csname2 = "ButtonClickScript";

    if (!IsClientScriptBlockRegistered(csname1))
    {
        String cstext1 = "<script type=\"text/javascript\">" +
            "alert('Hello World');</" + "script>";
        RegisterStartupScript(csname1, cstext1);
    }

    if (!IsClientScriptBlockRegistered(csname2))
    {
      StringBuilder cstext2 = new StringBuilder();
      cstext2.Append("<script type=\"text/javascript\"> function DoClick() {");
      cstext2.Append("Form1.Message.value='Text from client script.'} </");
      cstext2.Append("script>");
      RegisterClientScriptBlock(csname2, cstext2.ToString());
    }
  }
</script>
<html  >
  <head>
    <title>RegisterClientScriptBlock Example</title>
  </head>
  <body>
     <form id="Form1"
         runat="server">
        <input type="text" id="Message" /> <input type="button" value="ClickMe" onclick="DoClick()" />
     </form>
  </body>
</html>

<%@ Page Language="VB"  %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<script runat="server">
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
        Dim csname1 As String = "PopupScript"

        Dim csname2 As String = "ButtonClickScript"
    
        If Not IsClientScriptBlockRegistered(csname1) Then
            Dim cstext1 As String = "<script type=""text/javascript"">" & _
                "alert('Hello World');</" & "script>"
            RegisterStartupScript(csname1, cstext1)
        End If
    
        If Not IsClientScriptBlockRegistered(csname2) Then
            Dim cstext2 As New StringBuilder()
            cstext2.Append("<script type=""text/javascript""> function DoClick() {")
            cstext2.Append("Form1.Message.value='Text from client script.'} </")
            cstext2.Append("script>")
            RegisterClientScriptBlock(csname2, cstext2.ToString())
        End If
    End Sub
</script>
<html  >
  <head>
    <title>RegisterClientScriptBlock Example</title>
  </head>
  <body>
     <form id="Form1"
         runat="server">
        <input type="text" id="Message" /> <input type="button" value="ClickMe" onclick="DoClick()" />
     </form>
  </body>
</html>

Comentarios

Llame a este método antes Page.RegisterStartupScript de llamar a para evitar que se ensamble innecesariamente el script del lado cliente.Call this method before calling Page.RegisterStartupScript to avoid unnecessarily assembling the client-side script. Esto es especialmente importante si el script requiere una gran cantidad de recursos del servidor que crear.This is particularly important if the script requires a large amount of server resources to create.

El método IsStartupScriptRegistered está desusado.The IsStartupScriptRegistered method has been deprecated. Utilice el IsStartupScriptRegistered método en la ClientScriptManager clase.Use the IsStartupScriptRegistered method in the ClientScriptManager class.

Se aplica a

Consulte también: