如何解决MVC HtmlHelpers遇到Razor问题
| 我正在使用一个非营利性捐赠平台，并且是第一次使用MVC。我大部分都掌握了它，但是现在我遇到了一个我不知道该如何解决的问题。我使用的是AthorizeNet.Helpers类，当我从示例中添加代码时，它在大多数情况下都可以工作，除了它采用表格并将其放在标签上方，但是将表格字段放在正确的位置。我正在尝试弄清楚如何在正确的位置呈现标记。@using AuthorizeNet.Helpers;
@using (Html.BeginSIMForm(\"http://127.0.0.1:4768\",1.99M,\"xxx_key\",\"yyy_key\",true))
{
@Html.Raw(Html.CheckoutFormInputs(true))
@Html.Hidden(\"order_id\",\"1234\")
<input type = \"submit\" value = \"Pay\" />
}
<form action = \'https://test.authorize.net/gateway/transact.dll\' method = \'post\'>
<input type = \'hidden\' name = \'x_fp_hash\' value = \'6bef386eaa89944efd62b47b86042910\' \\>
<input type = \'hidden\' name = \'x_fp_sequence\' value = \'117\'\\>
<input type = \'hidden\' name = \'x_fp_timestamp\' value = \'xxx_key\' \\>
<input type = \'hidden\' name = \'x_login\' value = \'yyy_key\' \\>
<input type = \'hidden\' name = \'x_amount\' value = \'1.99\' \\>
<input type = \'hidden\' name = \'x_relay_url\' value = \'http://127.0.0.1:4768\' \\>
<input type = \'hidden\' name = \'x_relay_response\' value = \'TRUE\' \\>
</form><!DOCTYPE html>
<html>
<body>
<h2>Payment Information</h2>
<div style = \'border: 1px solid #990000; padding:12px; margin-bottom:24px; background-color:#ffffcc;width:300px\'>Test Mode</div>
<div style = \'float:left;width:250px;\'>
<label>Credit Card Number</label>
<div id = \'CreditCardNumber\'>
<input type = \'text\' size = \'28\' name = \'x_card_num\' value = \'4111111111111111\' id = \'x_card_num\'/>
</div>
</div>
<div style = \'float:left;width:70px;\'>
<label>Exp.</label>
<div id = \'CreditCardExpiration\'>
<input type = \'text\' size = \'5\' maxlength = \'5\' name = \'x_exp_date\' value = \'0116\' id = \'x_exp_date\'/>
</div>
</div>
<div style = \'float:left;width:70px;\'>
<label>CCV</label>
<div id = \'CCV\'>
<input type = \'text\' size = \'5\' maxlength = \'5\' name = \'x_card_code\' id = \'x_card_code\' value = \'123\' />
</div>
</div><input id=\"order_id\" name=\"order_id\" type=\"hidden\" value=\"1234\" /> <input type = \"submit\" value = \"Pay\" />
解决方法
当直接为输出流编写的辅助程序是为ASP.NET MVC 1编写的时，通常会发生此类问题（并且使用附带的帮助程序大多数时候都直接写入输出流）。在ASP.NET MVC 1中，可以使用以下命令写入输出流：
htmlHelper.ViewContext.HttpContext.Response.Output
htmlHelper.ViewContext.Writer
namespace AuthorizeNet.Helpers -> CheckoutFormBuilders.cs
using System.IO;
HttpResponseBase to TextWriter
HttpResponseBase _response; to TextWriter _response;
public SIMForm(TextWriter response,string returnUrl,decimal amount,string apiLogin,string transactionKey)
:this(response,returnUrl,amount,apiLogin,transactionKey,true){}
public SIMForm(TextWriter response,string transactionKey,bool isTest) {
_response = response;
_amount = amount;
_apiLogin = apiLogin;
_transactionkey = transactionKey;
_returnUrl = returnUrl;
_isTest = isTest;
OpenForm();
}
helper.ViewContext.HttpContext.Response
helper.ViewContext.Writer
public static SIMForm BeginSIMForm(this HtmlHelper helper,string transactionKey) {
return new SIMForm(helper.ViewContext.Writer,true);}
public static SIMForm BeginSIMForm(this HtmlHelper helper,bool isTest) {
return new SIMForm(helper.ViewContext.Writer,isTest);}
<br />
<input type = \"submit\" value = \"Pay\" style=\"position:relative; top:35px;\" />
public static class MyAuthNetHelper
{
public const string TEST_URL = \"https://test.authorize.net/gateway/transact.dll\";
public const string LIVE_URL = \"https://secure.authorize.net/gateway/transact.dll\";
public static string ApiLogin
{
get { return ConfigurationManager.AppSettings[\"AuthNetAPILogin\"]; }
}
public static string TransactionKey
{
get { return ConfigurationManager.AppSettings[\"AuthNetAPITransactionKey\"]; }
}
public static string ReturnUrl
{
get { return ConfigurationManager.AppSettings[\"AuthNetReturnUrl\"]; }
}
public static string ThanksUrl
{
get { return ConfigurationManager.AppSettings[\"AuthNetThanksUrl\"]; }
}
public static bool TestMode
{
get { return bool.Parse(ConfigurationManager.AppSettings[\"AuthNetTestMode\"]); }
}
public static string GatewayUrl
{
get { return TestMode ? TEST_URL : LIVE_URL; }
}
public static MvcHtmlString AuthNetDirectPostFields(this HtmlHelper helper,decimal amount)
{
var seq = Crypto.GenerateSequence();
var stamp = Crypto.GenerateTimestamp();
var fingerPrint = Crypto.GenerateFingerprint(TransactionKey,ApiLogin,seq.ToString(),stamp.ToString());
var str = new StringBuilder();
str.Append(helper.Hidden(\"x_fp_hash\",fingerPrint));
str.Append(helper.Hidden(\"x_fp_sequence\",seq));
str.Append(helper.Hidden(\"x_fp_timestamp\",stamp));
str.Append(helper.Hidden(\"x_login\",ApiLogin));
str.Append(helper.Hidden(\"x_amount\",amount));
str.Append(helper.Hidden(\"x_relay_url\",ReturnUrl));
str.Append(helper.Hidden(\"x_relay_response\",\"TRUE\"));
return MvcHtmlString.Create(str.ToString());
}
}
<form id=\"paymentForm\" method=\"POST\" action=\"@MyAuthNetHelper.GatewayUrl\" class=\"form-horizontal offset1\">
@Html.AuthNetDirectPostFields(PutYourAmountHere)
...
</form>
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