Xamarin只言片语2——Xamarin下的web api操作
在很多時候，我們是希望手機app是要和服務端關聯，并獲取服務端的數據的，本篇博文我們看一下在xmarin下，怎么和用web api的方式與服務端連接并獲取數據。
首先看web api的開發，本實例是用Visual Studio 2013 with update 4開發
然后創建一個實體類City
public?class?City
?{
?????public?int?Code
?????{?get;?set;?}
?????public?string?Name
?????{?get;?set;?}
?}
再創建一個WebApiController
????[RoutePrefix("api")]
public?class?TestController?:?ApiController
{
????[HttpGet]
????[Route("citys")]//通過路由設計為citys
????public?IHttpActionResult?GetCitys()
????{
????????var?citys?=?new?List<City>()?{
????????new?City(){?Code=1,Name="北京"},
????????new?City(){Code=2,Name="天津"}
????????};
????????return?Json(citys);//通過Json方式返回數據
????}
?
????[HttpPost]//設定請求方式為get請求
????[Route("login")]//通過路由設計為citys
????public?IHttpActionResult?SaveUser(string?UserName,?string?Password)
????{
????????if?(UserName?==?"aaa"?&&?Password?==?"bbb")
????????{
????????????return?Ok(1);
????????}
????????else
????????{
????????????return?Ok(0);
????????}
????}
}
并鍵一點是要把webapi項目布署到IIS上，本例訪問地址是：http://192.168.1.106/api
Android端
創建一個Android的空項目。
右擊項目，“管理Nuget程序包”，查Restsharp for Android，并安裝
新建一個窗體，axml如下：
<?xml?version="1.0"?encoding="utf-8"?>
<LinearLayout?xmlns:android="http://schemas.android.com/apk/res/android"
????android:orientation="vertical"
????android:layout_width="fill_parent"
????android:layout_height="fill_parent">
????<Button
????????android:text="確定"
????????android:layout_width="match_parent"
????????android:layout_height="wrap_content"
????????android:id="@+id/But1"?/>
????<EditText
????????android:inputType="textMultiLine"
????????android:layout_width="match_parent"
????????android:layout_height="wrap_content"
????????android:id="@+id/username"?/>
????<EditText
????????android:inputType="textMultiLine"
????????android:layout_width="match_parent"
????????android:layout_height="wrap_content"
????????android:id="@+id/password"?/>
????<Button
????????android:text="確定"
????????android:layout_width="match_parent"
????????android:layout_height="wrap_content"
????????android:id="@+id/But2"?/>
</LinearLayout>
后端代碼如下：
using?System;
using?Android.App;
using?Android.Content;
using?Android.Runtime;
using?Android.Views;
using?Android.Widget;
using?Android.OS;
using?RestSharp;
using?System.Net;
using?System.Collections.Generic;?
namespace?WebApiAndroid
{
????[Activity(Label?=?"WebApiAndroid",?MainLauncher?=?true,?Icon?=?"@drawable/icon")]
????public?class?MainActivity?:?Activity
????{
????????protected?override?void?OnCreate(Bundle?bundle)
????????{
????????????base.OnCreate(bundle);?
????????????SetContentView(Resource.Layout.Main);?
????????????Button?but1?=?FindViewById<Button>(Resource.Id.But1);
????????????Button?but2?=?FindViewById<Button>(Resource.Id.But2);
????????????EditText?username_et?=?FindViewById<EditText>(Resource.Id.username);
????????????EditText?password_et?=?FindViewById<EditText>(Resource.Id.password);
????????????but1.Click?+=?delegate
????????????{
????????????????RestClient?client?=?new?RestClient(@"http://192.168.1.106/api/");
????????????????RestRequest?request?=?new?RestRequest(@"citys",?Method.GET);
????????????????client.ExecuteAsync(request,?resp?=>
????????????????{
????????????????????if?(resp.StatusCode?==?HttpStatusCode.OK)
????????????????????{
????????????????????????var?v?=?resp.Content;
????????????????????????var?citys?=?SimpleJson.DeserializeObject<List<City>>(v);
????????????????????????RunOnUiThread(()?=>?Toast.MakeText(this,?"獲取成功!"?+?citys.Count,?ToastLength.Short).Show());
????????????????????}
????????????????????else
????????????????????{
????????????????????????RunOnUiThread(()?=>?Toast.MakeText(this,?"獲取失敗："?+?resp.StatusCode.ToString(),?ToastLength.Short).Show());
????????????????????}
????????????????});?
????????????};?
????????????but2.Click?+=?delegate
????????????{
????????????????RestClient?client?=?new?RestClient(@"http://192.168.1.106/api/");
????????????????RestRequest?request?=?new?RestRequest(@"login",?Method.POST);
????????????????//輸入參數
????????????????request.AddParameter("UserName",?username_et.Text,?ParameterType.QueryString);
????????????????request.AddParameter("Password",?password_et.Text,?ParameterType.QueryString);
????????????????//上傳結果回調函數
????????????????client.ExecuteAsync(request,?resp?=>
????????????????{
????????????????????if?(resp.StatusCode?==?HttpStatusCode.OK)
????????????????????{
????????????????????????var?v?=?resp.Content;
????????????????????????if?(v?==?"1")
????????????????????????{
????????????????????????????RunOnUiThread(()?=>?Toast.MakeText(this,?"登錄成功",?ToastLength.Short).Show());
????????????????????????}
????????????????????????else
????????????????????????{
????????????????????????????RunOnUiThread(()?=>?Toast.MakeText(this,?"登錄失敗："?+?resp.StatusCode.ToString(),?ToastLength.Short).Show());
????????????????????????}
????????????????????}
????????????????????else
????????????????????{
????????????????????????RunOnUiThread(()?=>?Toast.MakeText(this,?"獲取失敗："?+?resp.StatusCode.ToString(),?ToastLength.Short).Show());
????????????????????}
????????????????});?
????????????};
????????}
????}?
????public?class?City
????{
????????public?int?Code
????????{?get;?set;?}?
????????public?string?Name
????????{?get;?set;?}?
????}
}
IPhone端
對于IOS開發，也是同樣的，在Visual Studio中新建一個IPhone的應用。
這時要求連接一Mac作為Build Host
這里我設置的是我的mac系統
同時打開Mac上的xamarin.ios build host，開始配對
在開發端輸入mac端生成的pin碼
開始配對，這里要注意你的visual studio所在的windows要與?build host所在的mac處于同一個局域網內。
?
右鍵IOS項目，打開nuget，安裝Restsharp for ios
還有另一個辦法來添加RestSharp引用，打開下面網址
https://github.com/restsharp/RestSharp
下載程序包
重新編譯RestSharp.IOS，并把bin目錄中生成(最好是Release下)的RestSharp.IOS.dll引用到當前的IOS項目中。
打開IOS項目中的MainStoryboard.storyboard，添加兩個按鈕MyBut1和MyBut2，和兩個文本框，分別是UserName_TB和Password_TB
后臺Controller中的代碼如下：
using?System;
using?System.Drawing;?
using?Foundation;
using?UIKit;
using?RestSharp;
using?System.Net;
using?System.Collections.Generic;?
namespace?WebApiIPhone
{
????public?partial?class?RootViewController?:?UIViewController
????{
????????public?RootViewController(IntPtr?handle)
????????????:?base(handle)
????????{
????????}?
????????public?override?void?DidReceiveMemoryWarning()
????????{
????????????base.DidReceiveMemoryWarning();
????????}?
????????#region?View?lifecycle?
????????public?override?void?ViewDidLoad()
????????{
????????????base.ViewDidLoad();?
????????????MyBut1.TouchUpInside?+=?MyBut1_TouchUpInside;
????????????MyBut2.TouchUpInside?+=?MyBut2_TouchUpInside;
????????}
?
????????void?MyBut2_TouchUpInside(object?sender,?EventArgs?e)
????????{
????????????RestClient?client?=?new?RestClient(@"http://192.168.1.106/api/");
????????????RestRequest?request?=?new?RestRequest(@"login",?Method.POST);
????????????//輸入參數
????????????request.AddParameter("UserName",?UserName_TB.Text,?ParameterType.QueryString);
????????????request.AddParameter("Password",?Password_TB.Text,?ParameterType.QueryString);
????????????//上傳結果回調函數
????????????client.ExecuteAsync(request,?resp?=>
????????????{
????????????????if?(resp.StatusCode?==?HttpStatusCode.OK)
????????????????{
????????????????????var?v?=?resp.Content;
????????????????????if?(v?==?"1")
????????????????????{
????????????????????????InvokeOnMainThread(delegate
????????????????????????????{
????????????????????????????????var?alert?=?new?UIAlertView("提示",?"登錄成功：",?new?AlertDelegate(),?"確定");
????????????????????????????????alert.Show();
????????????????????????????});
????????????????????}
????????????????????else
????????????????????{
????????????????????????InvokeOnMainThread(delegate
????????????????????????????{
????????????????????????????????var?alert?=?new?UIAlertView("提示",?"登錄失敗：",?new?AlertDelegate(),?"確定");
????????????????????????????????alert.Show();
????????????????????????????});
????????????????????}
????????????????}
????????????????else
????????????????{
????????????????????InvokeOnMainThread(delegate
???????????????????{
???????????????????????var?alert?=?new?UIAlertView("提示",?"登錄成功："?+?resp.StatusCode.ToString(),?new?AlertDelegate(),?"確定");
???????????????????????alert.Show();
???????????????????});?
????????????????}
????????????});
????????}?
????????void?MyBut1_TouchUpInside(object?sender,?EventArgs?e)
????????{
????????????RestClient?client?=?new?RestClient(@"http://192.168.1.106/api/");
????????????RestRequest?request?=?new?RestRequest(@"citys",?Method.GET);
????????????client.ExecuteAsync(request,?resp?=>
????????????{
????????????????if?(resp.StatusCode?==?HttpStatusCode.OK)
????????????????{
????????????????????var?v?=?resp.Content;
????????????????????var?citys?=?SimpleJson.DeserializeObject<List<City>>(v);
?
????????????????????InvokeOnMainThread(delegate
????????????????????{
????????????????????????var?alert?=?new?UIAlertView("提示",?"獲取成功："?+?citys.Count,?new?AlertDelegate(),?"確定");
????????????????????????alert.Show();
????????????????????});?
????????????????}
????????????????else
????????????????{
????????????????????InvokeOnMainThread(delegate
????????????????????{
????????????????????????var?alert?=?new?UIAlertView("提示",?"獲取失敗！",?new?AlertDelegate(),?"確定");
????????????????????????alert.Show();
????????????????????});
????????????????}
????????????});?
????????}?
????????public?override?void?ViewWillAppear(bool?animated)
????????{
????????????base.ViewWillAppear(animated);
????????}?
????????public?override?void?ViewDidAppear(bool?animated)
????????{
????????????base.ViewDidAppear(animated);
????????}?
????????public?override?void?ViewWillDisappear(bool?animated)
????????{
????????????base.ViewWillDisappear(animated);
????????}?
????????public?override?void?ViewDidDisappear(bool?animated)
????????{
????????????base.ViewDidDisappear(animated);
????????}?
????????#endregion?
????????public?class?AlertDelegate?:?UIAlertViewDelegate
????????{
????????????public?override?void?Clicked(UIAlertView?alertview,?nint?buttonIndex)
????????????{
????????????????if?(buttonIndex?==?0)
????????????????{
????????????????????//確定處理代碼
????????????????}
????????????????else
????????????????{
????????????????????//取消處理代碼
????????????????}
????????????}
????????}?
????}?
????public?class?City
????{
????????public?int?Code
????????{?get;?set;?}
????????public?string?Name
????????{?get;?set;?}?
????}
}
這時你會發現，Android和IOS中的請求RestSharp的代碼是一致的。
效果如下：
Demo下載
本文轉自桂素偉51CTO博客，原文鏈接：?http://blog.51cto.com/axzxs/1620497，如需轉載請自行聯系原作者
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