HtmlInputFile.MaxLength Property
Gets or sets the maximum length of the file path for the file to upload from the client computer.
[Visual Basic] Public Property MaxLength As Integer [C#] public int MaxLength {get; set;} [C++] public: __property int get_MaxLength(); public: __property void set_MaxLength(int); [JScript] public function get MaxLength() : int; public function set MaxLength(int);
Property Value
The maximum length of the file path.
Remarks
Use this property to specify a limit for the number of characters that can be entered for the path to the file to upload.
Note Support for this property is browser dependent. Check with your browser to determine if it supports this property.
Example
[Visual Basic, C#, JScript] The following example demonstrates how to use the MaxLength property to limit the number of characters the file path may contain.
[Visual Basic] <%@ Page Language="VB" AutoEventWireup="True" %> <html> <head> <script language="VB" runat="server"> Sub Button1_Click(Source As Object, e As EventArgs) If Text1.Value = "" Then Span1.InnerHtml = "Error: you must enter a file name" Return End If If Not (File1.PostedFile Is Nothing) Then Try File1.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 'Button1_Click </script> </head> <body> <h3>HtmlInputFile Sample</h3> <form enctype="multipart/form-data" runat="server"> Select File to Upload: <input id="File1" type="file" maxlength="30" runat="server"/> <p> Save as filename (no path): <input id="Text1" type="text" runat="server"/> <p> <span id=Span1 style="font: 8pt verdana;" runat="server" /> <p> <input type=button id="Button1" value="Upload" OnServerClick="Button1_Click" runat="server"> </form> </body> </html> [C#] <%@ Page Language="C#" AutoEventWireup="True" %> <html> <head> <script language="C#" runat="server"> void Button1_Click(object Source, EventArgs e) { if (Text1.Value == "") { Span1.InnerHtml = "Error: you must enter a file name"; return; } if (File1.PostedFile != null) { try { File1.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(); } } } </script> </head> <body> <h3>HtmlInputFile Sample</h3> <form enctype="multipart/form-data" runat="server"> Select File to Upload: <input id="File1" type="file" maxlength="30" runat="server"/> <p> Save as filename (no path): <input id="Text1" type="text" runat="server"/> <p> <span id=Span1 style="font: 8pt verdana;" runat="server" /> <p> <input type=button id="Button1" value="Upload" OnServerClick="Button1_Click" runat="server"> </form> </body> </html> [JScript] <%@ Page Language="JScript" AutoEventWireup="True" %> <html> <head> <script language="JSCRIPT" runat="server"> function Button1_Click(source : Object, e : EventArgs){ if(Text1.Value == ""){ Span1.InnerHtml = "Error: you must enter a file name" return } if(File1.PostedFile != null){ try{ File1.PostedFile.SaveAs(("c:\\temp\\" + Text1.Value)) Span1.InnerHtml = "File uploaded successfully to <b>c:\\temp\\" + Text1.Value + "</b> on the Web server" }catch(exc : Exception){ Span1.InnerHtml = "Error saving file <b>c:\\temp\\" + Text1.Value + "</b><br>" + exc.ToString() } } } </script> </head> <body> <h3>HtmlInputFile Sample</h3> <form enctype="multipart/form-data" runat="server"> Select File to Upload: <input id="File1" type="file" maxlength="30" runat="server"/> <p> Save as filename (no path): <input id="Text1" type="text" runat="server"/> <p> <span id=Span1 style="font: 8pt verdana;" runat="server" /> <p> <input type=button id="Button1" value="Upload" OnServerClick="Button1_Click" runat="server"> </form> </body> </html>
[C++] No example is available for C++. To view a Visual Basic, C#, or JScript example, click the Language Filter button
in the upper-left corner of the page.
Requirements
Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family
See Also
HtmlInputFile Class | HtmlInputFile Members | System.Web.UI.HtmlControls Namespace