日期:2014-05-18  浏览次数:20462 次

DropDownList的问题:当我选中一个下拉选项时,选中值出现在旁边的TEXT框中
DropDownList的问题:当我选中一个下拉选项时,选中值出现在旁边的TEXT框中

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要不要刷新页面?
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C# code

<%@ 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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C# code
<%@ 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 r…

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HTML code
<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>