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<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
protected void Button1_Click(object sender, EventArgs e)
{
this.TextBox1.Text = "happy new year!";
}
protected void Button2_Click(object sender, EventArgs e)
{
this.TextBox1.Text = "happy new year!happy new year!";
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>無標題頁</title> <script language="javascript" type="text/javascript"> // <!CDATA[
function TextBox1_onkeydown()
{
if(event.keyCode==13)
{
__doPostBack("Button2","");
}
} // ]]>
</script>
</head>
<body>
<form id="form1" runat="server" >
<div>
<asp:TextBox ID="TextBox1" onkeydown="return TextBox1_onkeydown()" runat="server"></asp:TextBox>
<br />
<asp:Button ID="Button1" runat="server" Text="Button1" OnClientClick="return confirm('are you true?')" OnClick="Button1_Click" />
<br />
<asp:Button ID="Button2" runat="server" Text="Button2" OnClick="Button2_Click" />
<asp:DropDownList ID="DropDownList1" Width="0px" runat="server" AutoPostBack="True"> </asp:DropDownList>
</div>
</form>
</body>
</html>
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此頁面有一個文字框和兩個按鈕 ,
第一個按鈕點擊後彈出確認框,
如果使用者點擊確定後再回傳給伺服器,
如果點擊取消則不回傳給伺服器,
第二個銨鈕則直接提交給伺服器,
當使用者在文字框按下加車鍵時,
觸發button2的單擊事件,提交回伺服器執行,
更改文字框的值. 要做到這一點需要將一個dropdownList控制項加入到此頁面,
並將autopostback屬性設為true,
這樣做的原因是會在頁面上自動產生__dopostBack()函數,
以方便我們在javascript中調用.
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