为什么以下代码显示错误?请更正一下:
protected void Button1_Click(object sender, EventArgs e)
{
if (RadioButtonList1.SelectedIndex='0')
{
Response.Redirect("page1.aspx");
}
else if (RadioButtonList1.SelectedIndex='1')
{
Response.Redirect("page2.aspx");
}
else if (RadioButtonList1.SelectedIndex='2')
{
Response.Redirect("page3.aspx");
}
}
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我的设计代码是:
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:RadioButtonList ID="RadioButtonList1" runat="server">
<asp:ListItem>item1</asp:ListItem>
<asp:ListItem>item2</asp:ListItem>
<asp:ListItem>item3</asp:ListItem>
</asp:RadioButtonList></div>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
</form>
</body>
</html>
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因为SelectedIndex是一个整数,而不是一个字符.摆脱单引号.并且=是一个赋值运算符,而不是比较.
将其更改为
if (RadioButtonList1.SelectedIndex == 0)
{
Response.Redirect("page1.aspx");
}
else if (RadioButtonList1.SelectedIndex == 1)
{
Response.Redirect("page2.aspx");
}
else if (RadioButtonList1.SelectedIndex == 2)
{
Response.Redirect("page3.aspx");
}
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SelectedIndex是一个int,而不是一个字符串:
if (RadioButtonList1.SelectedIndex == 0)
{
Response.Redirect("page1.aspx");
}
else if (RadioButtonList1.SelectedIndex == 1)
{
// and so on
}
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