ASP.NET Tutorial/File Directory/DirectoryInfo — различия между версиями

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Текущая версия на 11:57, 26 мая 2010

Binding a GridView to directory files (C#)

<%@ 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 Page_Load(object sender, EventArgs e)
    {
        foreach (System.IO.DriveInfo drive in System.IO.DriveInfo.GetDrives())
        {
            TreeNode node = new TreeNode();
            node.Value = drive.Name;
            if (drive.IsReady)
                node.Text = drive.Name + " - (free space: " + drive.AvailableFreeSpace + ")";
            else
                node.Text = drive.Name + " - (not ready)";
            this.TreeView1.Nodes.Add(node);
        }
    }
    private void LoadDirectories(TreeNode parent, string path)
    {
        System.IO.DirectoryInfo directory = new System.IO.DirectoryInfo(path);
        try
        {
            foreach (System.IO.DirectoryInfo d in directory.GetDirectories())
            {
                TreeNode node = new TreeNode(d.Name, d.FullName);
                parent.ChildNodes.Add(node);
                LoadDirectories(node, d.FullName);
            }
        }
        catch (System.UnauthorizedAccessException e)
        {
            parent.Text += " (Access Denied)";
        }
        catch (Exception e)
        {
            parent.Text += " (Unknown Error: " + e.Message + ")";
        }
    }
    protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
    {
        System.IO.DirectoryInfo directory = new System.IO.DirectoryInfo(this.TreeView1.SelectedNode.Value);
        this.GridView1.DataSource = directory.GetFiles();
        this.GridView1.DataBind();
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table>
            <tr>
                <td valign="top">
                   <asp:TreeView ID="TreeView1" 
                                 runat="server"
                                 OnSelectedNodeChanged="TreeView1_SelectedNodeChanged">
                   </asp:TreeView>
                </td>
                <td valign="top">
                    <asp:GridView ID="GridView1" 
                                  runat="server"
                                  AutoGenerateColumns="False" 
                                  GridLines="None" CellPadding="3">
                        <Columns>
                            <asp:BoundField DataField="Name" HeaderText="Name"
                                 HeaderStyle-HorizontalAlign="Left" 
                                 HeaderStyle-Font-Bold="true" />
                            <asp:BoundField DataField="Length" HeaderText="Size"
                                 ItemStyle-HorizontalAlign="Right" 
                                 HeaderStyle-HorizontalAlign="Right" 
                                 HeaderStyle-Font-Bold="true" />
                            <asp:BoundField DataField="LastWriteTime"
                                 HeaderText="Date Modified" 
                                 HeaderStyle-HorizontalAlign="Left" 
                                 HeaderStyle-Font-Bold="true" />
                        </Columns>
                    </asp:GridView>
                </td>                
            </tr>
        </table>
        
    </div>
    </form>
</body>
</html>


Binding a GridView to directory files (VB)

<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
        For Each drive As System.IO.DriveInfo In System.IO.DriveInfo.GetDrives()
            Dim node As TreeNode = New TreeNode()
            node.Value = drive.Name
            If (drive.IsReady) Then
                node.Text = drive.Name & " - (free space: " & drive.AvailableFreeSpace & ")"
                LoadDirectories(node, drive.Name)
            Else
                node.Text = drive.Name & " - (not ready)"
            End If
            Me.TreeView1.Nodes.Add(node)
        Next
        
        Me.TreeView1.CollapseAll()
        
    End Sub
    
    Private Sub LoadDirectories(ByVal parent As TreeNode, ByVal path As String)
        
        Dim directory As System.IO.DirectoryInfo = New System.IO.DirectoryInfo(path)
        
        Try
            For Each d As System.IO.DirectoryInfo In directory.GetDirectories()
            
                Dim node As TreeNode = New TreeNode(d.Name, d.FullName)
                parent.ChildNodes.Add(node)
                LoadDirectories(node, d.FullName)
            Next
        Catch ex As System.UnauthorizedAccessException
            parent.Text += " (Access Denied)"
        Catch ex As Exception
            parent.Text += " (Unknown Error: " + ex.Message + ")"
        End Try
    End Sub
    Protected Sub TreeView1_SelectedNodeChanged _
        (ByVal sender As Object, ByVal e As System.EventArgs)
        Dim directory As System.IO.DirectoryInfo = New System.IO.DirectoryInfo(Me.TreeView1.SelectedNode.Value)
        Me.GridView1.DataSource = directory.GetFiles()
        Me.GridView1.DataBind()
    End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table>
            <tr>
                <td>
                   <asp:TreeView ID="TreeView1" runat="server"
                        OnSelectedNodeChanged="TreeView1_SelectedNodeChanged">
                   </asp:TreeView>
                </td>
                <td>
                    <asp:GridView ID="GridView1" runat="server"
                         AutoGenerateColumns="False" GridLines="None" CellPadding="3">
                        <Columns>
                            <asp:BoundField DataField="Name" HeaderText="Name"
                                 HeaderStyle-HorizontalAlign="Left" 
                                 HeaderStyle-Font-Bold="true" />
                            <asp:BoundField DataField="Length" HeaderText="Size"
                                 ItemStyle-HorizontalAlign="Right" 
                                 HeaderStyle-HorizontalAlign="Right" 
                                 HeaderStyle-Font-Bold="true" />
                            <asp:BoundField DataField="LastWriteTime"
                                 HeaderText="Date Modified" 
                                 HeaderStyle-HorizontalAlign="Left" 
                                 HeaderStyle-Font-Bold="true" />
                        </Columns>
                    </asp:GridView>
                </td>                
            </tr>
        </table>
    
    </div>
    </form>
</body>
</html>


Manually enumerating directory files (C#)

<%@ 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 Page_Load(object sender, EventArgs e)
    {
        System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(@"C:\");
        
        foreach (System.IO.FileInfo file in dir.GetFiles("*.*"))
        {
            Response.Write(file.Name + "<BR>");
            Response.Write(file.LastWriteTime.ToString() + "<BR>");
            Response.Write(file.Attributes.ToString() + "<BR>");
        }
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    </div>
    </form>
</body>
</html>


Manually enumerating directory files (VB)

<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
        
        Dim dir As System.IO.DirectoryInfo = New System.IO.DirectoryInfo("C:\")
        
        For Each file As System.IO.FileInfo In dir.GetFiles("*.*")
            Response.Write(file.Name & "<BR>")
            Response.Write(file.LastWriteTime.ToString() & "<BR>")
            Response.Write(file.Attributes.ToString() & "<BR>")
        Next
    End Sub
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
    
    </div>
    </form>
</body>
</html>
Источник — «http://nfex.ru/index.php?title=ASP.NET_Tutorial/File_Directory/DirectoryInfo&oldid=2994»