Verification and Validation Upload File Type and File Size - ASP .Net
Check file size and file type before upload - with C#
In the previous articles I explained about How to Call Asp.Net WebMethod using Ajax jQuery in Web Application?, C# GridView - How to change Cell Color based on different values? and many more.
In this post I will explain the functionality to upload the image by using asp:FileUpload control in asp .net, before uploading the file if you want to check or validate the file extension, file size and the allow to upload. Find the source code below:-
Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Check file size and
file type before upload - with C#</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
Browse Image: - <asp:FileUpload runat="server" ID="upFile" CssClass="EU_FileUpload" />
</ContentTemplate>
</asp:UpdatePanel>
<br />
<asp:Button ID="btnSave" runat="server" Text="Validate" OnClick="btnSave_Click" />
<asp:Label ID="lblMsg" runat="server" Text=""></asp:Label>
</div>
</form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.UI;
using
System.Web.UI.WebControls;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
lblMsg.Text = string.Empty;
}
protected void btnSave_Click(object sender, EventArgs e)
{
ValidateFileUpload();
}
// validating file size
public void
ValidateFileUpload()
{
try
{
if (upFile.HasFile)
{
Int32 maxFileSize =
1024000;
Int32 fileSize =
upFile.PostedFile.ContentLength;
if (fileSize >
maxFileSize)
{
lblMsg.Text = String.Format("Max. File
size exceeded {0} KB", maxFileSize / 1024);
}
else
{
if
(CheckFileType(upFile.FileName))
{
String filePath = "~/UploadImages" + upFile.FileName;
upFile.SaveAs(MapPath(filePath));
ScriptManager.RegisterStartupScript(this, this.GetType(), "OptStatus", "<script>alert('File
Uploaded Successfully!');</script>", false);
}
else
{
ScriptManager.RegisterStartupScript(this, this.GetType(), "OptStatus", "<script>alert('Invalid
Image File!');</script>", false);
}
}
}
}
catch (Exception ex)
{
throw;
}
}
// To check file type
public bool CheckFileType(String fileName)
{
try
{
switch (Path.GetExtension(fileName).ToLower())
{
case ".gif":
case ".png":
case ".jpg":
case ".jpeg":
return true;
default:
return false;
}
}
catch (Exception ex)
{
throw;
}
}
}
Download the source code click here
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Verification and Validation Upload File Type and File Size - ASP .Net
Reviewed by Ravi Kumar
on
1:57 PM
Rating:
Reviewed by Ravi Kumar
on
1:57 PM
Rating:
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