完成ASP.NET页面加载后运行javascript函数

Question

I need to run a javascript function from ASP.NET code behind AFTER the page is completed.

I've used this code so far but it returns "undefined" because the hidden field is not filled with the value when javascript function is fired.

What should I do? Thanx in advance.

ASPX:

  <asp:HiddenField runat="server" ID="ColorHiddenField" ClientIDMode="Static" Value="0" />

Javascript:

    function HandleColors() {
        alert($('#<%= ColorHiddenField.ClientID %>').val());
    }

Code Behind:

  ColorHiddenField.Value = item.Color;
  ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "script", "HandleColors();", true);

Answer 1

尝试下面的代码，它使用jQuery document.ready在页面加载后运行你的脚本：

ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "script", "$(function () { HandleColors(); });", true);

Answer 2

使用RegisterStartupScript而不是RegisterClientScriptBlock之类的

ScriptManager.RegisterStartupScript(this, this.GetType(), "script", "HandleColors();", true);

Answer 3

try with jquery document ready.

$( document ).ready(function() {
   alert($('#<%= ColorHiddenField.ClientID %>').val());
});