c# - 从 C# Windows 窗体调用 PHP Web 服务

Question

我正在尝试将 C# Windows 窗体的用户名、密码和软件 token 编号验证为 MySQL 数据库中的值。

我的 C# 代码:

 private void btnlogin_Click(object sender, EventArgs e)
    {
        if (String.IsNullOrEmpty(txtusername.Text))
        {
            MessageBox.Show("Please insert username");
        }

        if (String.IsNullOrEmpty(txtpassword.Text))
        {
            MessageBox.Show("Please insert password");
        }

        var username = txtusername.Text;
        var password = txtpassword.Text;
        string Token = "28956";
        var SoftwareToken = token;
        WebRequest request = WebRequest.Create("https://mydomain.com.au/Verification.php?username=username&password=password&Token=SoftwareToken");
        request.Method = "GET";
        WebResponse response = request.GetResponse();
        Console.WriteLine(((HttpWebResponse)response).StatusDescription);
        Stream dataStream = response.GetResponseStream();
        // Open the stream using a StreamReader for easy access.  
        StreamReader reader = new StreamReader(dataStream);
        // Read the content.  
        var responseFromServer = reader.ReadToEnd();
        responseFromServer.ToArray();
        /*I have tried:
        responseFromServer.ToArray();(because result on php page is an array.
  I have tried responseFromServer.ToString();*/
        MessageBox.Show(responseFromServer);
    }

我的 PHP 代码(Web 服务):

<?php
// Database Structure 
require_once('connect.php');

//Get password from the database for the user
$stmtus = $conn->prepare("SELECT password from `Users` where `email` = :Username");
$stmtus->bindParam(':Username', $username);
$username= $_GET['username'];;
$stmtus -> execute();
$password = $stmtus->fetch();

$un = $_GET['username'];
$pw = $_GET['password'];
$ust = $_GET['Token'];

if(password_verify($pw, $password[0])){
    $stmt = $conn->prepare("SELECT 
    COUNT(Token) AS cnt FROM `SoftwareToken` 
    LEFT JOIN User ON iduser = SoftwareToken.Consultant 
    WHERE Token = '$ust' 
    AND username = '$un'");
    $stmt->bindValue(':Username', $un);
    $stmt->bindValue(':Token', $ust);
    $stmt->execute();
    $result= array();
    while($SToken= $stmt->fetch(PDO::FETCH_OBJ)){
    array_push($result, $SToken->cnt);  
    }
echo json_encode($result);

}

$conn = null;

?>

我正在努力了解如何从 C# 应用程序调用 Web 服务，如何将变量从 C# 应用程序传递到 Web 服务，以及如何将 json_encode 从 Web 服务返回到 C# 应用程序。

我不是全职程序员，这是我第一次接触 Web 服务。如果对如何改进其中任何一个代码有任何建议，我将不胜感激。

更新

我已在协助下更新了我的代码。当我运行带有变量的 php 代码时，它会运行并给我一个 $result(数组)。数字答案 1.

当我测试我的代码以在 MessageBox 中显示结果时，MessageBox 是空的。为什么？

Answer 1

当然，您可以从 C# 调用 WebService。 系统中有一个内置的类。

单向:

WebRequest request = WebRequest.Create("http://localhost:8080/?username=john");
request.Method="GET";
WebResponse response = request.GetResponse();

其他方式:

HttpClient client = new HttpClient();
client.BaseAddress = new Uri("http://localhost:8080/");
HttpResponseMessage response = await client.PostAsJsonAsync( "api/user", userName);
response.EnsureSuccessStatusCode();