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[英]Xamarin form - how to upload and retrieve image using sql server web api
[英]How to work Xamarin with SQL Server using Web API
我正在嘗試使用 Web API 使用 Xamarin 連接到 SQL Server,但我不知道我做錯了什么,這是我的代碼,
Webapi 控制器
public class LoginController : ApiController
{
UserEntities db = new UserEntities();
[HttpPost]
[ActionName("XAMARIN_REG")]
// POST: api/Login
public HttpResponseMessage Xamarin_reg(string username, string password)
{
Login login = new Login();
login.username = username;
login.password = password;
db.Logins.Add(login);
db.SaveChanges();
return Request.CreateResponse(HttpStatusCode.Accepted, "Successfully Created");
}
[HttpGet]
[ActionName("XAMARIN_Login")]
// GET: api/Login/5
public HttpResponseMessage Xamarin_login(string username, string password)
{
var user = db.Logins.Where(x => x.username == username && x.password == password).FirstOrDefault();
if (user == null)
{
return Request.CreateResponse(HttpStatusCode.Unauthorized, "Please Enter valid UserName and Password");
}
else
{
return Request.CreateResponse(HttpStatusCode.Accepted, "Success");
}
}
}
xamarin 活動
public class MainActivity : Activity
{
EditText txtusername;
EditText txtPassword;
Button btncreate;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
// Create your application here
SetContentView(Resource.Layout.Main);
txtusername = FindViewById<EditText>(Resource.Id.txtsaveusername);
txtPassword = FindViewById<EditText>(Resource.Id.txtsavepassword);
btncreate = FindViewById<Button>(Resource.Id.btnsavecreate);
btncreate.Click += Btncreate_Click;
}
private async void Btncreate_Click(object sender, EventArgs e)
{
Login log = new Login();
log.username = txtusername.Text;
log.password = txtPassword.Text;
HttpClient client = new HttpClient();
string url = "http://localhost:54445/api/Login/";
var uri = new Uri(url);
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
HttpResponseMessage response;
var json = JsonConvert.SerializeObject(log);
var content = new StringContent(json, Encoding.UTF8, "application/json");
response = await client.PostAsync(uri, content);
if (response.StatusCode == System.Net.HttpStatusCode.Accepted)
{
var errorMessage1 = response.Content.ReadAsStringAsync().Result.Replace("\\", "").Trim(new char[1]
{
'"'
});
Toast.MakeText(this, errorMessage1, ToastLength.Long).Show();
}
else
{
var errorMessage1 = response.Content.ReadAsStringAsync().Result.Replace("\\", "").Trim(new char[1]
{
'"'
});
Toast.MakeText(this, errorMessage1, ToastLength.Long).Show();
}
}
}
我想在不使用 azure 的本地 sql 服務器上工作,此代碼應該將用戶名和密碼保存到我的本地 sql 服務器,但是當我單擊按鈕保存它時,給我這個錯誤
System.Net.Http.HttpRequestException: An error occurred while sending the request
像這樣編輯您的 WebApiConfig.cs 文件並更改路由模板,
路由模板:“api/{controller}/{action}/{id}”
希望它有效。
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