в 15:30, 26 мая 2010

2010-05-26T15:30:57Z

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2010-05-26T11:57:38Z

1 версия

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== Creating a File (C#)==



<source lang="csharp">
<%@ Page Language="c#" %>
<%@ Import Namespace = "System.IO" %>
<script language="c#" runat="Server">
public void CreateFile(object sender, EventArgs e)
{
StreamWriter myFileStream = null;
if(TextContent.Text.Trim().Length > 0)
{
try
{
myFileStream = File.CreateText(Server.MapPath(".\\Upload\\") + "test.txt");
myFileStream.WriteLine(TextContent.Text);
myFileStream.Close();
Output.Text = "File Successfully Created!";
}
catch (Exception exc)
{
Output.Text = "Error in Creating file. Error is " + exc.ToString();
}
finally
{
if(myFileStream != null)
myFileStream.Close();
}
}
else
{
Output.Text = "File not created, because you didn"t enter anything!";
}
}
</script>
<HTML>
<HEAD>
<title>Creating a File</title>
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<asp:Label ID="Msg" Runat="server" Text="Please enter some text: "></asp:Label><br>
<asp:TextBox ID="TextContent" Runat="server" TextMode="MultiLine" Rows="10" Columns="75"></asp:TextBox><br>
<asp:Button ID="Submit" Runat="server" Text="Submit" OnClick="CreateFile"></asp:Button>
<asp:Label ID="Output" Runat="server"></asp:Label>
</form>
</body>
</HTML></source>

== Creating a File (VB)==



<source lang="csharp">
<%@ Page Language="vb" Explicit="true" Strict="true" %>
<%@ Import Namespace = "System.IO" %>
<script language="vb" runat="Server">
Sub CreateFile(sender As Object, e As EventArgs)
If Trim(TextContent.Text).Length > 0 Then
Dim myFileStream As StreamWriter = Nothing
Try
myFileStream = File.CreateText(Server.MapPath(".\Upload\") & "test.txt")
myFileStream.WriteLine(TextContent.Text)
myFileStream.Close()
Output.Text = "File Successfully Created!"
Catch exc As Exception
Output.Text = "Error in Creating file. Error is " & exc.ToString()
Finally
If Not myFileStream Is Nothing Then
myFileStream.Close()
End If
End Try
Else
Output.Text = "File not created, because you didn"t enter anything!"
End If
End Sub
</script>
<HTML>
<HEAD>
<title>Creating a File</title>
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<asp:Label ID="Msg" Runat="server" Text="Please enter some text: "></asp:Label><br>
<asp:TextBox ID="TextContent" Runat="server" TextMode="MultiLine" Rows="10" Columns="75"></asp:TextBox><br>
<asp:Button ID="Submit" Runat="server" Text="Submit" OnClick="CreateFile"></asp:Button>
<asp:Label ID="Output" Runat="server"></asp:Label>
</form>
</body>
</HTML></source>

== Delete a file (C#)==



<source lang="csharp">
<%@ Import Namespace="System" %>
<%@ Import Namespace="System.IO" %>
<%@ Page Language="C#" %>
<script runat="server">
void Page_Load(Object Source, EventArgs E)
{
MessageLiteral.Text = "";
}

void DeleteFile(Object Source, EventArgs E)
{
FileInfo fileSource = new FileInfo(FileNameTextBox.Text);

try{
if (fileSource.Exists){
fileSource.Delete();
MessageLiteral.Text = "File has been deleted.";
}
else
MessageLiteral.Text = FileNameTextBox.Text + " does not exist.";
}
catch (Exception _Error){
MessageLiteral.Text = _Error.Message;
}
}
</script>
<html>
<head>
<title>Deleting a File</title>
</head>
<body>
<form runat="server">
<h4>Type Path/Name of file to delete it (disabled for live demo)
</h4>

<asp:TextBox id="FileNameTextBox" runat="server"></asp:TextBox>
 <asp:Button id="DeleteFileButton" onclick="DeleteFile" runat="server" Text="Delete File"></asp:Button>

<asp:Literal id="MessageLiteral" runat="server"></asp:Literal>

</form>
</body>
</html></source>

== Delete a file (VB)==



<source lang="csharp">
<%@ Import Namespace="System" %>
<%@ Import Namespace="System.IO" %>
<%@ Page Language="VB" %>
<script runat="server">
Public Sub Page_Load(Source As Object, E As EventArgs)
MessageLiteral.Text = ""
End Sub

Public Sub DeleteFile(Source As Object, E As EventArgs)
"Delete the file if it exists
Try
If File.Exists(FileNameTextBox.Text) Then
File.Delete(FileNameTextBox.Text)
MessageLiteral.Text = "File has been deleted."
Else
MessageLiteral.Text = FileNameTextBox.Text & " does not exist."
End If
Catch _Error As Exception
MessageLiteral.Text = _Error.Message
End Try

End Sub
</script>
<html>
<head>
<title>Deleting a File</title>
</head>
<body>
<form runat="server">
<h4>Type Path/Name of file to delete it (disabled for live demo)
</h4>

<asp:TextBox id="FileNameTextBox" runat="server"/>
 <asp:Button id="DeleteFileButton" onclick="DeleteFile" runat="server" Text="Delete File"></asp:Button>

<asp:Literal id="MessageLiteral" runat="server"></asp:Literal>

</form>
</body>
</html></source>

== Get file information (VB.net)==



<source lang="csharp">
<%@ Import Namespace="System.IO" %>
<script language="VB" runat="server">

sub Page_Load(Sender as Object, e as EventArgs)
dim f as new FileInfo(Server.MapPath("test.aspx"))
lblMessage.Text = "File information<br>" & _
"<b>Name: </b>" & f.Name & "<br>" & _
"<b>Path: </b>" & f.DirectoryName & "<br>" & _
"<b>Last access time: </b>" & f.LastAccessTime & _
"<br>" & _
"<b>Last write time: </b>" & f.LastWriteTime & _
"<br>" & _
"<b>Length: </b>" & f.Length & " bytes"
end sub
</script>
<html><body>
<asp:label id="lblMessage" runat=server/>
</body></html></source>

== Load file content to DropDownList (C#)==



<source lang="csharp">
<%@ Page Language="C#" Debug="true" %>
<script runat="server">
private void Page_Load(object sender, System.EventArgs e) {
string MyFileName;
System.IO.StreamReader ObjectStreamReader = null;
ArrayList FileLines = new ArrayList();
MyFileName = Page.MapPath("Data.txt");
try {
ObjectStreamReader = new System.IO.StreamReader (MyFileName);
while (ObjectStreamReader.Peek() > -1) {
FileLines.Add(ObjectStreamReader.ReadLine());
}
FileLines.Sort();
Label1.Text = "Select a title:";
DropDownList1.DataSource = FileLines;
DropDownList1.DataBind();
} catch (Exception ObjectError) {
Label1.Text = ObjectError.Message;
DropDownList1.Visible = false;
} finally {
if (ObjectStreamReader != null) {
ObjectStreamReader.Close();
}
}

}
</script>
<html>
<head>
</head>
<body>
<form runat="server">
<asp:Label id="Label1" runat="server"></asp:Label>
<asp:DropDownList id="DropDownList1" runat="server"></asp:DropDownList>
</form>
</body>
</html></source>

== Load file content to DropDownList (VB)==



<source lang="csharp">
<%@ Page Language="VB" Debug="true" %>
<script runat="server">
Sub Page_Load (Sender As Object, E As EventArgs)
Dim MyFileName as String
Dim ObjectStreamReader as System.IO.StreamReader
Dim FileLines as New ArrayList()
MyFileName = Page.MapPath("Data.txt")
Try
ObjectStreamReader = new System.IO.StreamReader (MyFileName)
While ObjectStreamReader.Peek() > -1
FileLines.Add(ObjectStreamReader.ReadLine())
End While
FileLines.Sort()
Label1.Text = "Select a title:"
DropDownList1.DataSource = FileLines
DropDownList1.DataBind()
Catch ObjectError as Exception
Label1.Text = ObjectError.Message
DropDownList1.Visible = False
Finally
If Not ObjectStreamReader Is nothing Then
ObjectStreamReader.Close()
End If
End Try
End Sub
</script>
<html>
<head>
</head>
<body>
<form runat="server">
<asp:Label id="Label1" runat="server"></asp:Label>
<asp:DropDownList id="DropDownList1" runat="server"></asp:DropDownList>
</form>
</body>
</html></source>

== Opening a File (C#)==



<source lang="csharp">
<%@ Page Language="c#" Explicit="true" Strict="true" %>
<%@ Import Namespace = "System.IO" %>
<script language="c#" runat="Server">
public void ReadFile(object sender, EventArgs e)
{
StreamReader FileStreamReader = null;
try
{
FileStreamReader = File.OpenText (Server.MapPath(".\\Upload\\") + "test.txt");
TextContent.Text = FileStreamReader.ReadToEnd();
FileStreamReader.Close();
OutputLabel.Text = "File Succesfully Read!";
}
catch (Exception exc)
{
OutputLabel.Text = "Error in Reading file. Error is " + exc.ToString();
}
finally
{
if(FileStreamReader!=null)
FileStreamReader.Close();
}
}
</script>
<html>
<head>
<title>Opening a File</title>
</head>
<body>
<form id="Form1" method="post" runat="server">
<asp:TextBox ID="TextContent" Runat="server" TextMode="MultiLine" Rows="10" Columns="75"></asp:TextBox><br>
<asp:Button ID="Submit" Runat="server" Text="Submit" OnClick="ReadFile"></asp:Button>
<asp:Label ID="OutputLabel" Runat="server"></asp:Label>
</form>
</body>
</html></source>

== Opening a File (VB)==



<source lang="csharp">
<%@ Page Language="vb" Explicit="true" Strict="true" %>
<%@ Import Namespace = "System.IO" %>
<script language="vb" runat="Server">
Sub ReadFile(ByVal sender As Object, ByVal e As EventArgs)
Dim FileStreamReader As StreamReader
Try
FileStreamReader = File.OpenText(Server.MapPath(".\Upload\") & "test.txt")
TextContent.Text = FileStreamReader.ReadToEnd()
FileStreamReader.Close()
OutputLabel.Text = "File Succesfully Read!"
Catch exc As Exception
OutputLabel.Text = "Error in Reading file. Error is " & exc.ToString()
Finally
If Not FileStreamReader Is Nothing Then
FileStreamReader.Close()
End If
End Try
End Sub
</script>
<html>
<head>
<title>Opening a File</title>
</head>
<body>
<form id="Form1" method="post" runat="server">
<asp:TextBox ID="TextContent" Runat="server" TextMode="MultiLine" Rows="10" Columns="75"></asp:TextBox><br>
<asp:Button ID="Submit" Runat="server" Text="Submit" OnClick="ReadFile"></asp:Button>
<asp:Label ID="OutputLabel" Runat="server"></asp:Label>
</form>
</body>
</html></source>

== Rename File==



<source lang="csharp">
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="Rename" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Rename File</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<h1>Rename File</h1>
<asp:Label ID="lblOldName" runat="server" Text="Old Name: "></asp:Label>
<asp:TextBox ID="txtOldName" runat="server"></asp:TextBox>
<br />
<asp:Label ID="lblNewName" runat="server" Text="New Name: "></asp:Label>
<asp:TextBox ID="txtNewName" runat="server"></asp:TextBox><br />
<br />
<asp:Button ID="btnBadRename" runat="server" OnClick="btnBadRename_Click" Text="Bad Rename" />
<asp:Button ID="btnGoodRename" runat="server" OnClick="btnGoodRename_Click" Text="Good Rename" /></div>
</form>
</body>
</html>
File: Default.aspx.cs
using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.IO;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
public partial class Rename : System.Web.UI.Page
{
protected void btnBadRename_Click(object sender, EventArgs e)
{
string appPath = Request.PhysicalApplicationPath;
string oldPath = Path.rubine(appPath, txtOldName.Text);
string newPath = Path.rubine(appPath, txtNewName.Text);
File.Move(oldPath, newPath);
}
protected void btnGoodRename_Click(object sender, EventArgs e)
{
string oldPath = Server.MapPath(txtOldName.Text);
string newPath = Server.MapPath(txtNewName.Text);
File.Move(oldPath, newPath);
}
}</source>

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ASP.NET Tutorial/File Directory/File - История изменений

в 15:30, 26 мая 2010

Admin: 1 версия