WebApi代码：
public class ValuesController : ApiController
{ Entities db=new Entities(); // GET api/values
public IEnumerable<Person> Get()
{
return db.Person;
} // GET api/values/5
public Person Get(int id)
{
return db.Person.FirstOrDefault(o => o.id == id);
} // POST api/values
public void Post([FromBody]Person value)
{
// People peple =(People) JsonConvert.DeserializeObject(value);
if (db.Person.FirstOrDefault(o => o.id == value.id) == null)
{
db.Person.Add(value);
}
db.SaveChanges();
} // PUT api/values/5
public void Put(int id, [FromBody]Person value)
{
var query = db.Person.FirstOrDefault(o => o.id == id);
if (query != null)
{
query.Name = value.Name;
}
db.SaveChanges();
} // DELETE api/values/5
public void Delete(int id)
{
var query = db.Person.FirstOrDefault(o => o.id == id);
if (query != null)
{
db.Person.Remove(query);
db.SaveChanges();
} }
}
Winform的基本代码：
private Uri url = new Uri("http://localhost:18827/api/values");
/// <summary>
/// 增
/// </summary>
private async void button1_Click(object sender, EventArgs e)
{
People people = new People();
people.Id = new Random().Next(, );
people.Name = "李" + people.Id;
string data = JsonConvert.SerializeObject(people);
//创建一个处理序列化的DataContractJsonSerializer
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(People));
MemoryStream ms = new MemoryStream();
serializer.WriteObject(ms, people);
//一定要在这设定Position
ms.Position = ;
HttpContent content = new StreamContent(ms);//将MemoryStream转成HttpContent
//一定要设定Header
content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");
HttpClient client = new HttpClient();
//由HttpClient发出Post Method
HttpResponseMessage response = await client.PostAsync(url, content);
if (response.IsSuccessStatusCode)
{
}
else
{
}
}
/// <summary>
/// 删除
/// </summary>
private async void button2_Click(object sender, EventArgs e)
{
HttpClient client = new HttpClient();
//由HttpClient发出Delete Method
HttpResponseMessage response = await client.DeleteAsync(url +"/1");
if (response.IsSuccessStatusCode)
{
MessageBox.Show("成功");
}
}
//修改
private async void button3_Click(object sender, EventArgs e)
{
//创建一个处理序列化的DataContractJsonSerializer
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(People));
MemoryStream ms = new MemoryStream();
//将资料写入MemoryStream
serializer.WriteObject(ms, new People() { Id = , Name = "Hello ni" });
//一定要在这设定Position
ms.Position = ;
HttpContent content = new StreamContent(ms);//将MemoryStream转成HttpContent
content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/json");
HttpClient client = new HttpClient();
//由HttpClient发出Put Method
HttpResponseMessage response = await client.PutAsync(url + "/1", content);
if (response.IsSuccessStatusCode)
{
MessageBox.Show("成功");
}
}
/// <summary>
/// 获取所有
/// </summary>
private void button4_Click(object sender, EventArgs e)
{
using (WebClient client = new WebClient())
{
client.Headers["Type"] = "GET";
client.Headers["Accept"] = "application/json";
client.Encoding = Encoding.UTF8;
client.DownloadStringCompleted += (senderobj, es) =>
{
if (es.Result != null)
{
var test = JsonConvert.DeserializeObject<People[]>(es.Result);
dataGridView1.DataSource = test;
}
};
client.DownloadStringAsync(url);
}
}