【发布时间】：2021-04-16 22:21:04
【问题描述】：
我正在尝试构建一个系统，当用户可以登录时，会看到一个选项菜单，从菜单中选择一个，然后根据该选择转到另一个屏幕。
我以这个网站为起点： https://www.mindstick.com/blog/647/creating-a-simple-data-entry-application-using-asp-dot-net-mvc-4
但是，当我尝试使用输入按钮创建第二个屏幕时，系统永远不会返回到控制器，而是返回到登录屏幕。不知何故，在不执行任何控制器代码的情况下，它会显示“无效的用户名/密码”消息。
控制器：
using gcbTaxFormEntry.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using System.IO;
using System.Security.Cryptography;
using System.Text;
namespace gcbTaxFormEntry.Controllers
{
public class HomeController : Controller
{
private readonly ILogger<HomeController> _logger;
public HomeController(ILogger<HomeController> logger)
{
_logger = logger;
}
//
// GET: /Home/
public IActionResult Index()
{
return View();
}
public IActionResult Privacy()
{
return View();
}
[ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
public IActionResult Error()
{
return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
}
[HttpGet]
public ViewResult Staff() { return View(); }
[HttpGet]
public ViewResult PickLocation() { return View(); }
[HttpPost]
public ViewResult Index(AuthInfo AI)
{
if (AI.Uname == null || AI.Pword == null)
{
ModelState.AddModelError("LogOnError", "Invalid Username/Password");
return View("Index");
}
AI.Uname = AI.Uname.ToLower();
MySqlConnection myConnection = new();
MySqlCommand myCommand = new();
MySqlDataAdapter myAdapter = new();
string ErrorMessage = SQLdbOpen(myConnection, myCommand);
if (ErrorMessage != string.Empty)
{
ModelState.AddModelError("LogOnError", ErrorMessage);
return View("Index");
}
DataTable AuthInfo = new();
string PassHash = ComputeSha256Hash(AI.Uname + AI.Pword);
myCommand.CommandText = "SELECT * FROM gcb.auth WHERE " +
"uname = ?uname AND passhash = ?passhash";
myCommand.Parameters.AddWithValue("?uname", AI.Uname);
myCommand.Parameters.AddWithValue("?passhash", PassHash);
myAdapter.SelectCommand = myCommand;
myAdapter.Fill(AuthInfo);
myCommand.Parameters.Clear();
if (AuthInfo.Rows.Count != 1)
{
ModelState.AddModelError("LogOnError", "Invalid Username/Password");
return View("Index");
}
CommonInfo Common = new();
Common.Uname = AI.Uname;
Common.Firstname = Convert.ToString(AuthInfo.Rows[0]["Firstname"]);
Common.Lastname = Convert.ToString(AuthInfo.Rows[0]["Lastname"]);
DataTable AuthLocationInfo = new();
myCommand.CommandText = "SELECT * FROM gcb.authlocations " +
"join gcb.locationinfo on authlocations.locationnumber = locationinfo.locationnumber " +
"WHERE uname = ?uname";
myCommand.Parameters.AddWithValue("?uname", Common.Uname);
myAdapter.SelectCommand = myCommand;
myAdapter.Fill(AuthLocationInfo);
myCommand.Parameters.Clear();
myConnection.Close();
switch (AuthLocationInfo.Rows.Count)
{
case 0:
ModelState.AddModelError("LogOnError", "No Authorized Locations");
return View("Index");
case 1:
Common.LocationNumber = Convert.ToString(AuthLocationInfo.Rows[0]["LocationNumber"]);
Common.PrimaryName = Convert.ToString(AuthLocationInfo.Rows[0]["PrimaryName"]);
Common.Address = Convert.ToString(AuthLocationInfo.Rows[0]["Address"]);
Common.City = Convert.ToString(AuthLocationInfo.Rows[0]["City"]);
Common.County = Convert.ToString(AuthLocationInfo.Rows[0]["County"]);
Common.Area = Convert.ToString(AuthLocationInfo.Rows[0]["Area"]);
return View("ShowLocation", Common);
default:
return View("PickLocation", Common);
}
}
[HttpPost]
public ViewResult ShowLocation(CommonInfo Common)
{
string NextForm = Common.SelectedForm + "Form";
return View(NextForm, Common);
}
[HttpPost]
public ViewResult PickLocation(CommonInfo Common)
{
if (Common.LocationNumber == null)
{
ModelState.AddModelError("PickLocationMessage", "Invalid");
return View("PickLocation");
}
MySqlConnection myConnection = new();
MySqlCommand myCommand = new();
MySqlDataAdapter myAdapter = new();
string ErrorMessage = SQLdbOpen(myConnection, myCommand);
if (ErrorMessage != string.Empty)
{
ModelState.AddModelError("PickLocationMessage", ErrorMessage);
return View("PickLocation");
}
myCommand.Parameters.Clear();
DataTable LocationInfo = new();
myCommand.CommandText = "SELECT * FROM gcb.locationinfo WHERE " +
"LocationNumber = ? LocationNumber";
myCommand.Parameters.AddWithValue("?LocationNumber", Common.LocationNumber);
myAdapter.SelectCommand = myCommand;
myAdapter.Fill(LocationInfo);
if (LocationInfo.Rows.Count != 1)
{
myCommand.Parameters.Clear();
myConnection.Close();
ModelState.AddModelError("PickLocationMessage", "Invalid");
return View("PickLocation");
}
DataTable AuthLocations = new();
myCommand.CommandText = "SELECT * FROM gcb.authlocations WHERE " +
"uname = ?uname AND LocationNumber = ?LocationNumber";
myCommand.Parameters.AddWithValue("?uname", Common.Uname);
myAdapter.SelectCommand = myCommand;
myAdapter.Fill(AuthLocations);
myCommand.Parameters.Clear();
myConnection.Close();
if (AuthLocations.Rows.Count != 1)
{
myCommand.Parameters.Clear();
myConnection.Close();
ModelState.AddModelError("PickLocationMessage", "Not Authorized");
return View("PickLocation");
}
Common.PrimaryName = Convert.ToString(LocationInfo.Rows[0]["PrimaryName"]);
Common.Address = Convert.ToString(LocationInfo.Rows[0]["Address"]);
Common.City = Convert.ToString(LocationInfo.Rows[0]["City"]);
Common.County = Convert.ToString(LocationInfo.Rows[0]["County"]);
Common.Area = Convert.ToString(LocationInfo.Rows[0]["Area"]);
return View("ShowLocation", Common);
}
private static string ComputeSha256Hash(string rawData)
{
// Create a SHA256
using SHA256 sha256Hash = SHA256.Create();
// ComputeHash - returns byte array
byte[] bytes = sha256Hash.ComputeHash(Encoding.UTF8.GetBytes(rawData));
// Convert byte array to a string
StringBuilder builder = new();
for (int i = 0; i < bytes.Length; i++)
{
builder.Append(bytes[i].ToString("x2"));
}
return builder.ToString();
}
public string SQLdbOpen(MySqlConnection myConnection, MySqlCommand myCommand)
{
string ConnectionString = string.Empty;
string CSfilename = @"C:\users\mark\documents\mysql\ConnectionString.txt";
try
{
StreamReader cs = new(CSfilename);
while (!cs.EndOfStream)
{
ConnectionString += cs.ReadLine() + "; ";
}
cs.Close();
myConnection.ConnectionString = ConnectionString;
myConnection.Open();
myCommand.Connection = myConnection;
}
catch (MySqlException E)
{
return E.Message;
}
return string.Empty;
}
}
}
INDEX.cshtml 视图：
@model gcbTaxFormEntry.Models.AuthInfo
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<link href="~/css/site.css" rel="stylesheet" />
<meta name="viewport" content="width=device-width" />
<title>Login</title>
</head>
<body>
<h3 style="text-align: center"><img src=@Url.Content("/Images/Badge.jpg") width=200 height=200 /></h3>
<h1 style="text-align: center">Island of Montague</h1>
<h2 style="text-align: center">Gaming Control Board</h2>
<h3 style="text-align: center">Tax Form Entry System</h3>
<br />
@using (Html.BeginForm())
{
<table align="center">
<tr>
<td>Username :</td>
<td>@Html.TextBoxFor(m => m.Uname)</td>
</tr>
<tr>
<td>Password :</td>
<td>@Html.PasswordFor(m => m.Pword)</td>
</tr>
<tr>
<td> </td>
<td>@Html.ValidationMessage("LogOnError")</td>
</tr>
<tr>
<td></td>
<td><input type="submit" value="Login" /></td>
</tr>
<tr>
<td> </td>
<td> </td>
</tr>
<tr>
<td> </td>
<td> </td>
</tr>
<tr>
<td> </td>
<td>@Html.ActionLink("Meet Our Staff", "Staff")</td>
</tr>
</table>
}
</body>
</html>
“PickLocation”屏幕——如果用户被授权申请多个帐户，代码会转到此屏幕：
@model gcbTaxFormEntry.Models.CommonInfo
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<link href="~/css/site.css" rel="stylesheet" />
<meta name="viewport" content="width=device-width" />
<title>Pick Location</title>
</head>
<body>
<h1 style="text-align: center">
<img src=@Url.Content("/Images/Badge.jpg") width=80 height=80 />
Island of Montague
<img src=@Url.Content("/Images/Badge.jpg") width=80 height=80 />
</h1>
<h2 style="text-align: center">Gaming Control Board</h2>
<br />
<p style="text-align: center">Welcome @Model.Firstname @Model.Lastname (@Model.Uname)</p>
<br />
@using (Html.BeginForm())
{
<table align="center">
<tr>
<td>Account Number</td>
<td>@Html.TextBoxFor(m => m.LocationNumber)</td>
</tr>
<tr>
<td> </td>
<td>@Html.ValidationMessage("PickLocationMessage")</td>
</tr>
<tr>
<td></td>
<td><input type="submit" value="Select" /></td>
</tr>
</table>
}
</body>
</html>
ShowLocation.cshtml 屏幕：
@model gcbTaxFormEntry.Models.CommonInfo
@{
Layout = null;
}
<!DOCTYPE html>
<html>
<head>
<link href="~/css/site.css" rel="stylesheet" />
<meta name="viewport" content="width=device-width" />
<title>Show Location</title>
</head>
<body>
@using (Html.BeginForm())
{
<h1 style="text-align: center">
<img src=@Url.Content("/Images/Badge.jpg") width=80 height=80 />
Island of Montague
<img src=@Url.Content("/Images/Badge.jpg") width=80 height=80 />
</h1>
<h2 style="text-align: center">Gaming Control Board</h2>
<p style="text-align: center">Welcome @Model.Firstname @Model.Lastname (@Model.Uname)</p>
<p style="text-align: center"><b>Selected Location</b></p>
<table align="center" border="1">
<tr>
<td align="center">Account Number</td>
<td align="center">Primary Name</td>
<td align="center">Address</td>
<td align="center">City</td>
</tr>
<tr>
<td>@Html.TextBoxFor(m => m.LocationNumber, new { @readonly = "readonly" })</td>
<td>@Html.TextBoxFor(m => m.PrimaryName, new { @readonly = "readonly" })</td>
<td>@Html.TextBoxFor(m => m.Address, new { @readonly = "readonly" })</td>
<td>@Html.TextBoxFor(m => m.City, new { @readonly = "readonly" })</td>
</tr>
</table>
<br />
<table align="center">
<tr>
<td align="center"><b>Create A Draft Tax Form</b></td>
<td> </td>
<td align="center"><b>Review and File a Draft Tax Form</b></td>
</tr>
<tr>
<td align="center">
@Html.DropDownListFor(m => m.SelectedForm, new[]{
new SelectListItem() { Text = "NGC-01 Monthly Gross Revenue Report", Value = "NGC01" },
new SelectListItem() { Text = "NGC-02 Annual Fee for Games", Value = "NGC02" },
new SelectListItem() { Text = "NGC-04 Annual Fee for Slots", Value = "NGC04" },
new SelectListItem() { Text = "NGC-11 Live Entertainment Tax Report", Value = "NGC11" },
new SelectListItem() { Text = "NGC-12 Live Entertainment Tax Report", Value = "NGC12" },
new SelectListItem() { Text = "NGC-14 Quarterly State License Fee (Restricted)", Value = "NGC14" },
new SelectListItem() { Text = "NGC-15 Quarterly State License Fee (Non-Restricted)", Value = "NGC15" },
new SelectListItem() { Text = "NGC-16 Holiday or Special Event Application", Value = "NGC16" },
new SelectListItem() { Text = "NGC-17 Standard Financial Statement", Value = "NGC17" },
new SelectListItem() { Text = "NGC-17A Standard Financial Statement for SRO", Value = "NGC17A" },
new SelectListItem() { Text = "NGC-18 Report of Quarterly Expired Slot Machine Wagering Vouchers", Value = "NGC18" },
new SelectListItem() { Text = "NGC-19M Manufacturer of Interactive Gaming Systems License", Value = "NGC19M" },
new SelectListItem() { Text = "NGC-19O Operator of Interactive Gaming License", Value = "NGC19O" },
new SelectListItem() { Text = "NGC-19P Interactive Gaming Service Provider License", Value = "NGC19P" },
new SelectListItem() { Text = "NGC-20 Racing Information Disseminators Monthly Report (Info)", Value = "NGC20" },
new SelectListItem() { Text = "NGC-20A Racing Information Disseminators Monthly Report", Value = "NGC20A" },
new SelectListItem() { Text = "NGC-21D Distributor's License", Value = "NGC21D" },
new SelectListItem() { Text = "NGC-21M Manufacturer's License", Value = "NGC21M" },
new SelectListItem() { Text = "NGC-21P Operator of a Pari-Mutuel System License", Value = "NGC21P" },
new SelectListItem() { Text = "NGC-25 Operator of a Slot Machine Route License", Value = "NGC25" },
new SelectListItem() { Text = "NGC-25I Operator of a Inter-Casino Linked System License", Value = "NGC25I" },
new SelectListItem() { Text = "NGC-25O Operator of a Mobile Gaming System License", Value = "NGC25O" },
new SelectListItem() { Text = "NGC-27 Opeartor of an Information Service License", Value = "NGC27" },
new SelectListItem() { Text = "NGC-30 Monthly Gross Revenue Statistical Report Gaming Salon", Value = "NGC30" },
new SelectListItem() { Text = "NGC-31 Monthly Gross Revenue Statistical Report", Value = "NGC31" },
new SelectListItem() { Text = "NGC-32 Track Handle and Win Report", Value = "NGC32" },
new SelectListItem() { Text = "NGC-36 Slot Route Operator Informational Report", Value = "NGC36" },
new SelectListItem() { Text = "NGC-PMT-1 Pari-Mutuel Wagering Tax", Value = "NGCPMT1" },
new SelectListItem() { Text = "ER101 Monthly Condensed Financial Statements", Value = "ER101" },
}, "Choose a Tax Form")
</td>
<td> </td>
<td align="center">Imagine a Dropdown box here</td>
</tr>
</table>
<table align="center">
<tr>
<td>@Html.ValidationMessage("ShowLocationMessage")</td>
</tr>
<tr>
<td><input type="submit" value="Go" /></td>
</tr>
</table>
}
</body>
</html>
什么会导致系统无法正确处理 PickLocation 屏幕或 ShowLocation 屏幕上的提交按钮？
另外，我想知道我是否应该使用“表单身份验证”来执行此操作。你能指出我正确的方向吗？
【问题讨论】：
标签： c# html asp.net-mvc