文件删除代码：
<table border="1">
            <tr>
                <td colspan="2" style="color: #660066;">
                    删除文件：
                </td>
            </tr>
            <tr>
                <td style="font-size: 10pt">
                    请输入要删除文件的路径：
                </td>
                <td style="width: 158px">
                    <asp:TextBox ID="FileTextBox" runat="server"></asp:TextBox>
                </td>
               
            </tr>
            <tr>
                <td colspan="2">
                    <asp:Label ID="MsgLabel" runat="server" ForeColor="red"></asp:Label>
                </td>
            </tr>
            <tr>
                <td align="center" colspan="2">
                    <asp:Button ID="ExistButton" runat="server" Text="删除" OnClick="ExistButton_Click"  />
                </td>
            </tr>
        </table>

using System.IO;

public partial class Delete : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

}
    protected void ExistButton_Click(object sender, EventArgs e)
    {
        try
        {
            if (!File.Exists(FileTextBox.Text))
            {
                MsgLabel.Text = "该文件不存在";
            }
            else
            {
                File.Delete(FileTextBox.Text);
                MsgLabel.Text = "删除文件成功！";
            }
        }
        catch (Exception ee)
        {
            MsgLabel.Text = "操作失败！ 失败的原因是：" + ee.ToString();
        }
    }
}

2：读取文件详细信息：
<table border="1">
            <tr>
                <td colspan="2" style="color: #660066;">
                    获取文件的基本信息：
                </td>
            </tr>
            <tr>
                <td style="font-size: 10pt">
                    请输入要查看文件的路径：
                </td>
                <td style="width: 158px">
                    <asp:TextBox ID="FileNameTextBox" runat="server"></asp:TextBox>
                </td>
               
            </tr>
            <tr>
                <td colspan="2">
                    <asp:Label ID="MsgLabel" runat="server" ForeColor="red"></asp:Label><br/>
                    <asp:Label ID="DirLabel" runat="server"></asp:Label><br/>
                    <asp:Label ID="LengthLabel" runat="server" Text="Label"></asp:Label><br/>
                    <asp:Label ID="CreationTimeLabel" runat="server" Text="Label"></asp:Label><br/>
                    <asp:Label ID="LastWriteTimeLabel" runat="server" Text="Label"></asp:Label><br/>
                    <asp:Label ID="AttributesLabel" runat="server" Text="Label"></asp:Label>
                </td>
            </tr>
            <tr>
                <td align="center" colspan="2">
                    &nbsp;<asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="确定" /></td>
            </tr>
        </table>

using System.IO;

public partial class FileInfo : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

}

protected void Button1_Click(object sender, EventArgs e)
    {
        try
        {
            System.IO.FileInfo fi1 = new System.IO.FileInfo(FileNameTextBox.Text);

if (!fi1.Exists)
            {
                MsgLabel.Text = "该文件不存在！";
                DirLabel.Visible = false;
                LengthLabel.Visible = false;
                CreationTimeLabel.Visible = false;
                LastWriteTimeLabel.Visible = false;
                AttributesLabel.Visible = false;
            }
            else
            {
                MsgLabel.Text = "获取文件信息成功！内容如下：";
                DirLabel.Visible = true;
                LengthLabel.Visible = true;
                CreationTimeLabel.Visible = true;
                LastWriteTimeLabel.Visible = true;
                AttributesLabel.Visible = true;
                DirLabel.Text = "文件所在位置：" + fi1.DirectoryName;
                LengthLabel.Text = "文件大小：" + fi1.Length + "字节";
                CreationTimeLabel.Text = "文件创建时间：" + fi1.CreationTime;
                LastWriteTimeLabel.Text = "文件最近修改时间：" + fi1.LastWriteTime;
                AttributesLabel.Text = "文件属性：" + fi1.Attributes;
            }
        }
        catch (Exception ee)
        {
            MsgLabel.Text = "获取文件信息失败！失败原因：" + ee.ToString();
        }
    }
}