ASP.NET後臺輸出js

1、使用RegisterClientScriptBlock輸出js代碼塊

 StringBuilder sb = new StringBuilder();
  sb.Append("<input type=\"text\" id=\"txtGo\" name=\"txtGo\" style=\" width:30px\" >");
                sb.Append("<input type=\"button\" id=\"btnGo\" name=\"btnGo\" value=\"跳轉\" onclick=\"pagego();\" >");

 string scriptstrs = "";
                scriptstrs += "function pagego(){";
                scriptstrs += " var val = document.getElementById('txtGo').value;";
                scriptstrs +=" if (val >"+PageCount+") {alert('不能大於'+"+PageCount+");}";
                scriptstrs += "else {window.location.href = 'WordManager.aspx?page='+val;}}";
                if (!Page.ClientScript.IsClientScriptBlockRegistered(this.GetType(), "keys"))
                {

                    Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "keys", scriptstrs, true);

                }

 

2、使用 RegisterStartupScript輸出一次性使用的js代碼

      

  string scriptstrs = "<script>alert('歡迎光臨！');</script>";
        if (!Page.ClientScript.IsStartupScriptRegistered(this.GetType(),"welcome"))
        {
            Page.ClientScript.RegisterStartupScript(this.GetType(), "welcome", scriptstrs);
        }

 

3、使用RegisterClientScriptInclude後臺輸出已有js文件

首先建立 js文件test.js

if (!Page.ClientScript.IsClientScriptIncludeRegistered(this.GetType(), "keys"))//判斷keys是否已註冊過
{
   Page.ClientScript.RegisterClientScriptInclude("keys", "testjs.js");     
} 

4、運用Response.Write("<script>alert('ww');</script>"); 方式也可輸出簡單js代碼（不建議）