api接口为：http://localhost:63300/api/Pms/TaskAdd 现在需要模拟api接口发送如下信息：{ "WareHouseCode": "原材料", "LocationCode": "", "MaterialId": "满托盘", "TargetWareHouseCode": "", "TargetLocationCode": "工位1" }

好的，您可以使用以下代码来模拟发送POST请求：

using System;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp
{
    class Program
    {
        static async Task Main(string[] args)
        {
            var requestBody = "{\"WareHouseCode\":\"原材料\",\"LocationCode\":\"\",\"MaterialId\":\"满托盘\",\"TargetWareHouseCode\":\"\",\"TargetLocationCode\":\"工位1\"}";
            var requestContent = new StringContent(requestBody, Encoding.UTF8, "application/json");
            var httpClient = new HttpClient();
            var response = await httpClient.PostAsync("http://localhost:63300/api/Pms/TaskAdd", requestContent);
            var responseContent = await response.Content.ReadAsStringAsync();
            Console.WriteLine(responseContent);
        }
    }
}

需要注意的是，这里的requestBody是您要发送的JSON字符串，需要根据实际情况进行修改。同时，如果您的接口需要进行身份验证，还需要在请求头中添加相应的身份验证信息。