日期:2014-05-18 浏览次数:20485 次
<%@ 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 dpFruit_SelectedIndexChanged(object sender, EventArgs e) { txtFruit.Text = dpFruit.SelectedItem.Text; } </script> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>Untitled Page</title> </head> <body> <form id="form1" runat="server"> <div> <asp:DropDownList ID="dpFruit" runat="server" AutoPostBack="true" OnSelectedIndexChanged="dpFruit_SelectedIndexChanged"> <asp:ListItem>苹果</asp:ListItem> <asp:ListItem>桔子</asp:ListItem> </asp:DropDownList> <asp:TextBox ID="txtFruit" runat="server"></asp:TextBox> </div> </form> </body> </html>
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也可以有javascript
onchange事件
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<asp:DropDownList ID="DropDownList1" onchange="test();" runat="server"> <asp:ListItem Text="a" Value="0"></asp:ListItem> <asp:ListItem Text="b" Value="1"></asp:ListItem> </asp:DropDownList> <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <script language="javascript" type="text/javascript"> function test() { document.getElementById("TextBox1").value = document.getElementById("DropDownList1").value; } </script>