HtmlInputFile コンストラクタとは何？わかりやすく解説 Weblio辞書

<%@ Page Language="VB" AutoEventWireup="True"
 %>

<script runat="server">
 
  Sub Button1_Click(ByVal sender As
 Object, ByVal e As EventArgs)

    ' Get HtmlInputFile control from the Controls collection
    ' of the PlaceHolder control.
    Dim file As HtmlInputFile = _
       CType(Place.FindControl("File1"), HtmlInputFile)
 
    ' Make sure a file was submitted.
    If Text1.Value = "" Then
         
      Span1.InnerHtml = "Error: You must enter a file name."
      Return
          
    End If
 
    ' Save the file.
    If file.PostedFile.ContentLength > 0 Then

      Try
        
        file.PostedFile.SaveAs(("c:\temp\" & Text1.Value))
        Span1.InnerHtml = "File uploaded successfully to "
 & _
           "<b>c:\temp\" & Text1.Value &
 "</b> on the Web server."
        
      Catch exc As Exception
        
        Span1.InnerHtml = "Error saving file <b>c:\temp\"
 & _
           Text1.Value & "</b><br>"
 & exc.ToString() & "."
        
      End Try

    End If

  End Sub


  Sub Page_Load(ByVal sender As
 Object, ByVal e As EventArgs)

    ' Create a new HtmlInputFile control.
    Dim file As HtmlInputFile = New
 HtmlInputFile()
    file.ID = "File1"

    ' Add the control to the Controls collection of the
    ' PlaceHolder control.
    Place.Controls.Clear()
    Place.Controls.Add(file)

  End Sub
 
</script>

<html>
  <head>
    <title>HtmlInputFile Constructor Example</title>
  </head>

<body>
 
   <h3>HtmlInputFile Constructor Example</h3>
 
   <form enctype="multipart/form-data" 
         runat="server">
 
      Specify the file to upload:
      <asp:PlaceHolder id="Place"
                       runat="server"/> 
 
      <p>
      Save as file name (no path): 
      <input id="Text1" 
             type="text" 
             runat="server">
 
      </p>
      <p>
      <span id=Span1 
            style="font: 8pt verdana;" 
            runat="server" />

      </p>
      <p>
      <input type=button 
             id="Button1" 
             value="Upload" 
             onserverclick="Button1_Click" 
             runat="server">
 
      </p>
   </form>
 
</body>
</html>

<%@ Page Language="C#" AutoEventWireup="True" %>

<script runat="server">
  
  void Button1_Click(object sender, EventArgs e)
  {

    // Get the HtmlInputFile control from the Controls collection 
    // of the PlaceHolder control.
    HtmlInputFile file = (HtmlInputFile)Place.FindControl("File1");

    // Make sure a file was submitted.
    if (Text1.Value == "")
    {
      Span1.InnerHtml = "Error: You must enter a file name.";
      return;
    }

    // Save the file.
    if (file.PostedFile.ContentLength > 0)
    {
      try
      {
        
        file.PostedFile.SaveAs("c:\\temp\\" + Text1.Value);
        Span1.InnerHtml = "File uploaded successfully to " +
           "<b>c:\\temp\\" + Text1.Value + "</b> on the
 Web server.";
        
      }
      catch (Exception exc)
      {
        
        Span1.InnerHtml = "Error saving file <b>c:\\temp\\" +
           Text1.Value + "</b><br>" + exc.ToString() + ".";
        
      }
    }
  }

  void Page_Load(object sender, EventArgs e)
  {

    // Create a new HtmlInputFile control.
    HtmlInputFile file = new HtmlInputFile();
    file.ID = "File1";

    // Add the control to the Controls collection of the
    // PlaceHolder control.
    Place.Controls.Clear();
    Place.Controls.Add(file);

  }
 
</script>

<html>
  <head>
    <title>HtmlInputFile Constructor Example</title>
  </head>

  <body>
 
   <h3>HtmlInputFile Constructor Example</h3>
 
   <form enctype="multipart/form-data" 
         runat="server">
 
      Specify the file to upload:
      <asp:PlaceHolder id="Place" 
                       runat="server"/> 
 
      <p>
      Save as file name (no path): 
      <input id="Text1" 
             type="text" 
             runat="server">
 
      </p>
      <p>
      <span id=Span1 
            style="font: 8pt verdana;" 
            runat="server" />

      </p>
      <p>
      <input type=button 
             id="Button1" 
             value="Upload" 
             onserverclick="Button1_Click" 
             runat="server">
 
      </p>

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