不刷新动态添加FileUpload

页面

 

     < tr >
         < td  align ="right"  style ="height: 48px" >
             < asp:Label  ID ="Label8"  runat ="server"  Text ="附　　件："  Width ="100%" ></ asp:Label ></ td >
         < td  align ="left"  colspan ="3"  style ="height: 48px" >
         < div  id ="MyFile"  style ="width:100%" >
             < asp:FileUpload  ID ="FileUpload1"  runat ="server"  Width ="80%"   />        
             </ div >
             < input  id ="btn_AddFile"  type ="button"  runat ="server"  value ="添加附件"   />
         </ td >
     </ tr >

.cs中

 

  protected   void  Page_Load( object  sender, EventArgs e)
     ... {
        //注册添加文件脚本
        this.Page.ClientScript.RegisterStartupScript(this.GetType(), "MyScript",
        "function addFile(btn)" +
        "{ var str = '<br><INPUT type="file" style="width:80%" NAME="File">'; " +
        " document.getElementById('MyFile').insertAdjacentHTML("beforeEnd",str); " +
        " btn.value='继续添加附件'" +
       "}", true);
        btn_AddFile.Attributes.Add("onClick", "addFile(this)");
}