Greetings to all of you!!
Currently I am working on Payment gateway integration with my ASP.NET application, in which I have to post few form variables to Payment Gateway page using GET method. When I do it using simple HTML page using form controls to hold the values and post it to external payment gateway page then everything is working fine. When I am trying to do it from inside of my ASP.NET c# application, I am getting error :
Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.
On checking the Query string which is getting posted to external payment gateway page from my asp.net c# page there is an additional
__VIEWSTATE variable appended to my desired query string which holds the variable values I want to post to the payment gateway page. I have made
EnableViewState="false" , EnableEventValidation="false",EnableViewStateMac="false" to <%Page%> directives in ASPX page and added
this.EnableViewState = false in overridden onLoad method in code behind. For your reference adding the code snippets below:
ASPX page:
<body>
<%--<form id="pgform" name="pgform" action="http://172.21.24.71:3000/_layouts/TATA_AIG_Portal/EWallet_BillDesk_Dummy.aspx" method="post" runat="server"> --%>
<form id="pgform" name="pgform" action="http://103.253.36.55:8082/PaymentGateway.aspx"
method="get" target="_blank" runat="server">
<asp:HiddenField ID="mid" runat="server"></asp:HiddenField>
<asp:HiddenField ID="mtrxid" runat="server"></asp:HiddenField>
<asp:HiddenField ID="mitem" runat="server"></asp:HiddenField>
<asp:HiddenField ID="amount" runat="server"></asp:HiddenField>
<script type="text/javascript">
document.pgform.submit();
//alert("connector fired");
</script>
</form>
</body>
protected override void OnLoad(EventArgs e)
{
this.EnableViewState = false;
base.OnLoad(e);
}
protected void Page_Load(object sender, EventArgs e)
{
byte[] EncrKeyStream = Encoding.UTF8.GetBytes("nlxcK}~MWgf1WxrT");
if (Request.QueryString["c"] != null)
{
string qry = ConvertHexToString(Request.QueryString["c"]);
string strApplicationNo = qry.Split('|')[0];
string strTxnAmount = "1";
string mtrxId = "TAIGMI" + strApplicationNo;
string mItem = "TATAAIG MOTOR INSURANCE";
string encmtrxId = EncryptDecrypt.Encrypt(mtrxId, EncrKeyStream);
string encmItem = EncryptDecrypt.Encrypt(mItem, EncrKeyStream);
string encAmount = EncryptDecrypt.Encrypt(strTxnAmount, EncrKeyStream); ;
mid.Value = "TATAAIG_DEV";
mtrxid.Value = encmtrxId;
mitem.Value = encmItem;
amount.Value = encAmount;
}
}
Please help me in this regard. I really need this solution now it's been quite few hours & I am unable to find one solution. Requesting your help.
Thanks in advance.
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