Question

C# 在文本框中输入任意字符串，而后倒序输出？

如何在C#中的文本框里面输入任意字符串，而后倒序输出？谢谢

Answer 1

直接给出代码,如下:
aspx页中放置三个控件
<form name="form1" runat="server">
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" /><br />
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
</form>
aspx.cs页中添加Button1按钮的单击事件
protected void Button1_Click ( object sender , EventArgs e ) {
string text = TextBox1.Text;
string output = string.Empty;
for ( int i = text.Length ; i > 0 ; i-- ) {
output += text.Substring( i - 1 , 1 );
}
Label1.Text = output;
}
最后结果输出到Label1

Answer 2

直接给出代码,如下:
aspx页中放置三个控件
<form
name="form1"
runat="server">
<asp:TextBox
ID="TextBox1"
runat="server"></asp:TextBox>
<asp:Button
ID="Button1"
runat="server"
OnClick="Button1_Click"
Text="Button"
/><br
/>
<asp:Label
ID="Label1"
runat="server"
Text="Label"></asp:Label>
</form>
aspx.cs页中添加Button1按钮的单击事件
protected
void
Button1_Click
(
object
sender
,
EventArgs
e
)
{
string
text
=
TextBox1.Text;
string
output
=
string.Empty;
for
(
int
i
=
text.Length
;
i
>
0
;
i--
)
{
output
+=
text.Substring(
i
-
1
,
1
);
}
Label1.Text
=
output;
}
最后结果输出到Label1

Answer 3

将textBox的值赋给一个List然后用List的一个Reverse()方法就可以将他们到过来

Answer 4

for ( int i = text.Length - 1 ; i >= 0 ; i-- ) {
output += text[i];
}
简化一下楼上的

Answer 5

string s = "123456";
char[] aArr = s.toCharArray();
Array.Reserve(aArr);
Response.Write new string(aArr);