Page.RegisterStartupScript(String, String) 方法

定义

命名空间:
System.Web.UI
程序集:
System.Web.dll

注意

The recommended alternative is ClientScript.RegisterStartupScript(Type type, string key, string script). http://go.microsoft.com/fwlink/?linkid=14202

在页面响应中发出客户端脚本块。

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

参数

key
String

标识脚本块的唯一键。

script
String

将发送到客户端的脚本的内容。

属性
ObsoleteAttribute

示例

下面的代码示例演示如何 RegisterStartupScript 将该方法与该方法结合使用 IsStartupScriptRegistered 。 如果代码声明块中编写的 ECMAScript 尚未根据方法确定 IsStartupScriptRegistered 进行注册，则 RegisterStartupScript 进行调用。

<%@ 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>

注解

与RegisterClientScriptBlock该方法类似，该方法RegisterStartupScript在对象的Page元素的结束标记<form runat= server>之前发出脚本。 请务必在参数中指定的<script>脚本块字符串周围包括开始和结束script元素。

由于此方法使用键来标识脚本块，因此每次请求其他服务器控制实例请求脚本块时，都不必向输出流发出脚本块

具有相同 key 参数值的任何脚本块都被视为重复项。

注释

请记住，在脚本中包含 HTML 注释标记，以便在请求浏览器不支持脚本时不会呈现它。

方法 RegisterStartupScript 已弃用。 RegisterStartupScript请改用ClientScriptManager类中的方法。

适用于

另请参阅