how to solve “Validation of viewstate MAC failed” error while using form in ASP.NET?
Question
I'm trying to use a post method in a form using asp and C# , but Validation of viewstate MAC failed error happens here is my code :
<body>
<div class="clearfix">
<label>User Name : </label>
<input id="u" runat="server"/>
</div>
<div class="clearfix">
<label>Password : </label>
<input id="p" runat="server" />
</div>
<asp:Button runat="server" Text="Enter"/>
<label id="notificationLabel" />
</body>
i tried both adding machin key to web config that didnt work . just like this :
<machinekey validation="SHA1" validationkey="A1B2C3D4E5F6F6E5D4C3B2A1A1B2C3D4E5F6F6E5D4C3B2A1A1B2C3D4E5F6F6E5D4C3B2A1A1B2C3D4E5F6F6E5D4C3B2A1A1B2C3D4E5F6F6E5D4C3B2A1B2C3D4E5" decryption="Auto" decryptionkey="A1B2C3D4E5F6F6E5D4C3B2A1A1B2C3D4E5F6F6E5D4C3B2A1" />
also in admin.aspx page i added these but still not working :
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="admin.aspx.cs" Inherits="admin" EnableEventValidation="false" ViewStateEncryptionMode="Never" ViewStateMode="Disabled" EnableViewStateMac="false" EnableViewState="false" %>
1 answers
solution1
1 ACCPTED 2015-04-22 08:01:33
just add :
<pages enableViewStateMac="false" />
in the web config file .
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