Server | client | Controls remember to use JavaScript frequently when using ASP. For example, verify the form, delete the confirmation, and so on. asp.net is server-side, our JavaScript has lost its application space. However, after some groping, in fact asp.net use JavaScript is very simple.
Let's first introduce the attributes properties of WebControl. (HTMLControl almost, no longer repeated), attributes is a collection of arbitrary attributes (rendering only) that do not correspond to the properties of the control. For example, a plain form control
<input type= "button" name= "button" value= "button" onclick= "Clickevent ()" >
The Type,name,button here are the properties of the button, the onclick button clicks after the event. These can be set by the attributes attribute set in asp.net.
Here's an example of verification of a login form.
<%@ Page language= "C #"%>
<script runat= "Server" >
void Page_Load (Object sender, EventArgs e)
{
Add Client onclick Event
button1.attributes["OnClick"]= "return Checkform ()";
}
</script>
<script language= "JavaScript" >
function Checkform ()
{
Verifying the Javascipt function of a form
if (document.all.username.value== "")
{
Alert ("Please fill in User name");
return false;
}
else if (document.all.password.value== "")
{
Alert ("Please fill in the password");
return false;
}
return true;
}
</script>
<body>
<form runat= "Server" >
<br/>
<table height= "Width=" >
<tbody>
<tr>
<td>
User name </td>
<td>
<asp:textbox id= "Username" runat= "Server" ></asp:TextBox>
</td>
</tr>
<tr>
<td>
Password </td>
<td>
<asp:textbox id= "PassWord" runat= "Server" textmode= "PassWord" ></asp:TextBox>
</td>
</tr>
<tr>
<td>
</td>
<td>
<asp:button id= "Button1" runat= "server" text= "login" ></asp:Button>
</td>
</tr>
</tbody>
</table>
</form>
</body>
is not back to the familiar method:)
