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Payfort Integration with Asp.Net MVC from server side

Currently, We are assigning the values in the below form and post the data to payfort. Which works fine!!
<form method="post" action="https://sbcheckout.payfort.com/FortAPI/paymentPage" id=form1 name=form1>
<input type="hidden" name="signature" />
<input type="hidden" name="command" />
<input type="hidden" name="merchant_reference" />
<input type="hidden" name="amount" />
<input type="hidden" name="access_code" />
<input type="hidden" name="merchant_identifier" />
<input type="hidden" name="currency" />
<input type="hidden" name="language" />
<input type="hidden" name="customer_email" />
<input type="hidden" name="payment_option" />
<input type="hidden" name="order_description" />
<input type="hidden" name="return_url" />
But when we post the data throw above method it shows the credential information to others
Is there any way that we can post the data to payfort from our controller and redirect to posted URL ?

You can use: https://github.com/payfort/payfort-dotnet-sdk/
this is official dotnet SDK from payfort

Yes you can post data to payfort using .Net Client library https://github.com/payfort/start.net
steps to call payfort.
1) Generate card Token
pass open key and card detail.
2) create charge using card token
3) capture charge amount

Asp.Net Change Value Without runat server

I want to set a value. But i can't use runat server on form. Because this form is a post form to paypal.
I closed runat form and i create a new form;
</form>
<form name="_xclick" action="https://www.paypal.com/tr/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="business" value="info2#gundogdubisiklet.com">
<input type="hidden" name="currency_code" value="TRY">
<input type="hidden" name="item_name" value="Gündoğdu Bisiklet E-Ticaret">
<input type="hidden" name="amount" value="12">
<input type="submit" border="0" name="submit" value="Şimdi Öde" alt="PayPal - Online ödeme yapmanın daha güvenli ve kolay yolu!">
</form>
So i cant set the amount value on c#.

Ohh how can i forget. I used like this;
<input type="text" name="amount" value="<%= SepetToplam().ToString() %>" />

Getting an "The recipient of this payment is Unregistered" error when trying to use PayPal "Buy Now" button

I'm trying to get my Buy Now button in PayPal Sandbox to work. However when I make a purchase using it, it does not show up on my business transaction overview. And in the personal account, it shows as "Unclaimed" and "The recipient of this payment is Unregistered". Here is the ASP.NET code I'm using for the button:
<form action="https://www.sandbox.paypal.com/cgi-bin/webscr" method="post" target="_top">
<input type="hidden" name="cmd" value="_xclick" />
<input type="hidden" name="notify_url" value="censored" />
<input type="hidden" name="item_name" value="Aktivt kontigent" />
<input type="hidden" name="item_number" value="1" />
<input type="hidden" name="amount" value="240" />
<input type="hidden" name="tax_rate" value="25" />
<input type="hidden" name="undefined_quantity" value="0" />
<input type="hidden" name="currency_code" value="USD" />
<input type="hidden" name="handling" value="5" />
<input type="hidden" name="business" value="censored" />
<asp:ImageButton ID="btnPayNow" runat="server" ImageUrl="~/images/btn_buynowCC_LG.gif" PostBackUrl="https://www.sandbox.paypal.com/cgi-bin/webscr"/>
</form>
I know I'm using the right business ID, because my Business name appears on the checkout page on PayPal. And the IPN is also working, I can see that on my server. However the transaction does not appear on seller account, and the personal account is having this weird status. Does anyone know how to fix this please?
Thank you in advance.

The problem with this was my e-mail was not veryfied. It worked after that.

paypal donation button integration in asp.net c#

it is required to integrate the paypal donation button in asp.net c# web form, on clicking the donate button an email should be sent to the receiver with capturing the details of the donor like donor name, occupation, address and donation amount etc.
Please any help from anyone will be appreciated.
thanks

First u go through with Paypal Documentaion... It is best source for to learn all the things which u require.
Paypal SDK Documentation
DOnation of paypal using Asp.Net : Custom Control
How to Use Paypal SDK.. Sample applicaiton.

Use this code for asp.net page for a simple donation button
<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_xclick">
<input type="hidden" name="business" value="myemail">
<input type="hidden" name="item_name" value="Item name">
<input type="hidden" name="item_number" value="Item ID">
<input type="hidden" name="amount" value="12.00">
<input type="hidden" name="buyer_credit_promo_code" value="">
<input type="hidden" name="buyer_credit_product_category" value="">
<input type="hidden" name="buyer_credit_shipping_method" value="">
<input type="hidden" name="buyer_credit_user_address_change" value="">
<input type="hidden" name="no_shipping" value="0">
<input type="hidden" name="no_note" value="1">
<input type="hidden" name="currency_code" value="USD">
<input name="cbt" value="Click here to confirm the payment" type="hidden"/>
<input type="hidden" name="lc" value="US">
<input type="hidden" name="bn" value="PP-BuyNowBF">
<input name="CANCELURL" value='<%=errorurl %>' type="hidden"/>
<input name="return" value='<%=url %>' type="hidden"/>
<input type="image" src="https://www.paypal.com/en_US/i/btn/btn_paynowCC_LG.gif" border="0" name="submit" alt="Make payments with PayPal - it's fast, free and secure!">
<img alt="" border="0" src="https://www.paypal.com/en_US/i/scr/pixel.gif" width="1" height="1">
</form>
'errorurl' and return url 'url' can be defined from codeback.
Also you can avoid unwanted parameters from the code.
You can set a custom image in the 'img' tag of the code.
Create a button of your own by using this link
https://www.paypal.com/cgi-bin/webscr?cmd=_donate-intro-outside

Resources mentioned are pretty good. To go through a live-setup example, you can visit this LINK and learn how you can achieve the same on your website.
NOTE: PayPal is integrated within a website, and doesn't offer a one-click solution like Web-API.

ASP.NET Photo API (Shutterfly, etc . .)

I have a website with all my photos, I would like people to be able to click on my pictures and order prints, etc through a third party service (Shutterfly, etc). Does anyone have any best practices or code examples of doing this in C#, ASP.NET?

I have no idea if this information is still up to date, but here is a description of the Shutterfly API. The API seems to consist in a simple HTTP form post with embedded name-value pairs.
Example:
<form action="http://www.shutterfly.com/c4p/UpdateCart.jsp" method="post">
<input type="hidden" name="addim" value="1">
<input type="hidden" name="protocol" value="SFP,100">
<input type="hidden" name="pid" value="C4P">
<input type="hidden" name="puid" value="AFFL">
<input type="hidden" name="imnum" value="1">
<input type="hidden" name="imraw-1" value="http://images.partner.com/foo/12345.jpg">
<input type="hidden" name="imrawheight-1" value="1800">
<input type="hidden" name="imrawwidth-1" value="1200">
<input type="hidden" name="imthumb-1" value="http://images.partner.com/foo/12345_thumb.jpg">
<input type="hidden" name="imthumbheight-1" value="150">
<input type="hidden" name="imthumbwidth-1" value="100">
<input type="hidden" name="returl" value="http://www.partner.com/alice">
<input type="submit" value="Submit">
</form>
It should not be a difficult task to write some C# wrapper for it.