ASP.NET Lable hidden 隱藏 取值 給值

 Lable hidden 隱藏 取值 給值

make hidden

document.getElementById('<%= lbl.ClientID%>').style.visibility = "hidden"; 

make visible

document.getElementById('<%= lbl.ClientID%>').style.visibility = "visible";

取值:var Label_text=document.getElementById('test_label').innerHTML;

給值:document.getElementById('test_label').innerHTML = ids;

這樣也抓值可以

      document.getElementById("<%=txtPatNo.ClientID %>").value = str_value;
 if (document.getElementById("<%=lblMsg.ClientID %>").innerText == "請輸入xxx"){
                               document.getElementById("<%=btnQuery.ClientID %>").onclick();}

如果是前台的值要讓後台使用，Lable這樣抓不到，要改用
<input type="hidden" id="abc" runat='server' />

給值後 
document.getElementById("ContentPlaceHolder1_abc").value = document.getElementById('ContentPlaceHolder1_FileUpload1').value;

後台就能抓abc.Value;