📄 ch13-02-02.aspx
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<%@ Import Namespace="System.IO" %>
<Html>
<Head>
<Title>Ch13-02-01.aspx 检查指定的文件是否存在</Title>
<Script Language="VB" Runat="Server">
Sub Button1_Click(Obj As Object, E As EventArgs)
Dim FileName As String = File1.Text
If Trim(File1.Text) = "" then
Label1.Text = "请输入文件名称！"
Exit Sub
End If
Dim Files As New FileInfo(FileName)
If Files.Exists Then
Label1.Text = "文件存在！"
Else
Label1.Text = "文件不存在！"
End if
End Sub
</Script>
</Head>
<Body>
<Form Runat="Server">
文件名称：
<asp:TextBox ID="File1" Columns="50"
Runat="Server" /><P>
<asp:Button ID="Button1" Text="检查"
OnClick="Button1_Click" Runat="Server" />
<asp:Label ID="Label1" BorderStyle="Double"
BorderColor="#FF0000" Runat="Server" />
</Form>
</Body>
</Html>
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