1、创建一个HttpClientHelper类声明HttpClient只读
public static class HttpClientHelper
{
private static readonly HttpClient client = new HttpClient();
public static async Task<HttpResponseMessage> PostAsync(string url, HttpContent content)
{
return await client.PostAsync(url, content);
}
}
2、调用方法，此处有三个参数其中一个为byte[]
public async Task<string> CallWebApiAsync(string url)
{
byte[] filecontent = FileContent(textBox2.Text);
string str = Convert.ToBase64String(filecontent);
var data = new { dataCode = textBox3.Text, dataContent = str, pwd= textBox4.Text }; // 你的数据模型
var json = JsonConvert.SerializeObject(data); // 将对象序列化为JSON字符串
var content = new StringContent(json, Encoding.UTF8, "application/json");
string responseBody = "";
try
{
var response = await HttpClientHelper.PostAsync(url, content);
response.EnsureSuccessStatusCode(); // 确保响应是成功的状态码（200-299）
responseBody = await response.Content.ReadAsStringAsync(); // 获取响应内容
//Console.WriteLine(responseBody); // 处理响应内容
}
catch (HttpRequestException ex)
{
//MessageBox.Show($"Error: {ex.Message}");
//Console.WriteLine(e.Message); // 处理异常情况
responseBody= ex.Message;
}
return responseBody;
}
3、调用上边的方法
private async void button1_Click(object sender, EventArgs e)
{
await CallWebApiAsync(textBox1.Text);
}