使用ScriptManager对象解决
#region 运行客户端脚本
    /// <summary>
    /// 运行客户端脚本
    /// </summary>
    /// <param name="page">当前页对象</param>
    /// <param name="script">客户端脚本</param>
    public static void RunClientScript(Page page,string script,bool addScriptTag)
    {
        string key = Guid.NewGuid().ToString("N");
        if (!page.ClientScript.IsStartupScriptRegistered(key))
        {
            ScriptManager.RegisterStartupScript(page,page.GetType(), key, script,addScriptTag);
        }
    }
    public static void RunClientBlockScript(Page page, string script,bool addScriptTag)
    {
        string key = Guid.NewGuid().ToString("N");
        if (!page.ClientScript.IsClientScriptBlockRegistered(key))
        {
            ScriptManager.RegisterClientScriptBlock(page,page.GetType(), key, script,addScriptTag);
        }
    }
    #endregion

• javascript