Image validations for file upload using regular expression validator in asp.net
In this article, we are validating the image type
for file upload using asp.net validator, for this we have use the regular
expression validator.
ValidationExpression="^
([0-9a-zA-Z_\-~ :\\])+( .jpg|.JPG|.jpeg|.JPEG|.bmp|.BMP|.gif|.GIF|.png|.PNG)$"
Source code:-
<%@
Page Language="C#" AutoEventWireup="true" CodeFile="imageuploader.aspx.cs" Inherits="imageuploader"
%>
<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title> validate
image using file upload </title>
</head>
<body>
<form id="form1" runat="server">
<div>
<fieldset style="width: 350px;">
<legend>How to
validate image using file upload</legend>
<asp:FileUpload ID="FileUpload1" runat="server" />
<br />
<asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server"
ControlToValidate="FileUpload1"
ErrorMessage="only jpeg,jpg,gif,bmp image allow" ForeColor="Red"
ValidationExpression="^([0-9a-zA-Z_\-~ :\\])+(.jpg|.JPG|.jpeg|.JPEG|.bmp|.BMP|.gif|.GIF|.png|.PNG)$"></asp:RegularExpressionValidator>
</fieldset>
</div>
</form>
</body>
</html>
Out-put:-
For More:-
Image validations for file upload using java script
Image validations for file upload using regular expression validator in asp.net
Reviewed by NEERAJ SRIVASTAVA
on
1:56:00 PM
Rating:
Reviewed by NEERAJ SRIVASTAVA
on
1:56:00 PM
Rating:
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