ASP.NET HtmlInputFile Control
 Complete HTML Control Reference
Definition and Usage
The HtmlInputFile control is used to control an <input type="file"> element. In HTML, this
element is used to upload a file to the server.
Properties
| Property |
Description |
| Accept |
List of acceptable MIME types |
| Attributes |
Returns all attribute name and value pairs of the element |
| Disabled |
A Boolean value that indicates whether or not the control
should be disabled. Default is false |
| id |
A unique id for the element |
| MaxLength |
The maximum number of characters allowed in this element |
| Name |
The name of the element |
| PostedFile |
Gets access to the posted file |
| runat |
Specifies that the element is a server control. Must
be set to "server" |
| Size |
The width of the element |
| Style |
Sets or returns the CSS properties that are applied to the
control |
| TagName |
Returns the element tag name |
| Type |
The type of the element |
| Value |
The value of the element |
| Visible |
A Boolean value that indicates whether or not the control
should be visible |
Example 1
In the following example we declare one HtmlInputFile
control, one HtmlInputButton
control, and three HtmlGeneric controls in an .aspx file (remember to embed the controls
inside an HtmlForm control). When the submit button is triggered, the submit subroutine is executed. The
file name and file type are displayed on the page, while the file itself is
uploaded to the c directory on the server:
<script runat="server">
Sub submit(Sender as Object, e as EventArgs)
fname.InnerHtml=MyFile.PostedFile.FileName
clength.InnerHtml=MyFile.PostedFile.ContentLength
MyFile.PostedFile.SaveAs("c:\uploadfile.txt")
End Sub
</script>
<html>
<body>
<form method="post"
enctype="multipart/form-data" runat="server">
<p>
Select file to upload to server:
<input id="MyFile" type="file" size="40" runat="server">
</p>
<p>
<input type="submit" value="Upload!" OnServerclick="submit"
runat="server">
</p>
<p>
<div runat="server">
FileName: <span id="fname" runat="server"/><br />
ContentLength: <span id="clength" runat="server"/> bytes
</div>
</p>
</form>
</body>
</html>
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