WebService 不会将信息填充到 Winform 上的文本字段中

Question

我有一个挑战，我最近写了一个 Web 服务，它能够从 MSSQL Server 获取数据并显示在 xml 中。

看起来像这样

Customer.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

/// <summary>
/// Summary description for Customer
/// </summary>
public class Customer
{
    public string fullname { get; set; }
    public string address { get; set; }
    public string city { get; set; }
    public string state { get; set; }
    public string id_type { get; set; }
    public string id_number { get; set; }
    public string dob { get; set; }
    public string bvn { get; set; }
}

并使用它从 Web 服务检索数据如下：

FetchInformationBVNService.cs

public Customer GetCustomerNameWithBVN(string bvn_search)
{
    using (SqlConnection cn = new SqlConnection(constring))
    {
        cn.Open();
        string q = "select fullname,address,city,state,id_type,id_number,date_ofbirth,bvn from account_info where bvn =@bvn";
        using (SqlCommand cmd = new SqlCommand(q, cn))
        {
            cmd.Parameters.AddWithValue("@bvn", bvn_search);
            using (SqlDataReader rd = cmd.ExecuteReader())
            {
                if (rd.Read())
                {
                    return new Customer
                    {
                        fullname = rd["fullname"].ToString(),
                        address = rd["address"].ToString(),
                        city = rd["city"].ToString(),
                        state = rd["state"].ToString(),
                        id_type = rd["id_type"].ToString(),
                        id_number = rd["id_number"].ToString(),
                        dob = rd["date_ofbirth"].ToString(),
                        bvn = rd["bvn"].ToString()
                    };
                }return null;
            }
        }

    }
}

一切正常，在 IIS Express 上测试，不用担心。现在我创建了一个 Winform 我想使用相同的 Web 服务，以便它可以使用以下命名控件填充一些文本字段：fullname.Text、address.Text、city.Text state.Text,id_type.Text,id_number.Text,bvn.Text.

它根本就没有填充。我已经从 Solutions Explorer -> Add -> Service Reference -> Advanced -> Add Web Reference 添加了 Web Reference， 然后我将那里的引用重命名为 newAccountSearchByBVN 这给我们带来了到现在为止有这样的事情：

参考资料

**newAccountSearchByBVN.FetchInformationBVNService** 其中 newAccountSearchByBVN 是命名空间，FetchInformationBVNService 是服务。

现在我又做了类似的事情来检索以下信息：

    newAccountSearchByBVN.Customer cs = new newAccountSearchByBVN.Customer();
    newAccountSearchByBVN.FetchInformationBVNService nacc = new newAccountSearchByBVN.FetchInformationBVNService();

Still wont work..

问题是，如何检索信息并填充表单字段以显示数据库中的信息。

正在尝试从数据库填充数据

编辑： 现在我尝试像这样从 Web 服务填充数据：

    private void button5_Click(object sender, EventArgs e)
    {
        newAccountSearchByBVN.Customer cs = new newAccountSearchByBVN.Customer();
        newAccountSearchByBVN.FetchInformationBVNService nacc = new newAccountSearchByBVN.FetchInformationBVNService();
        string a = nacc.GetCustomerNameWithBVN(bvn_search.Text).ToString();

        bool check = bool.Parse(a);
        if (check)
        {
            cs.fullname = fullname.Text;
            cs.address = address.Text;
            cs.city = city.Text;
            cs.state = state.Text;
            cs.id_type = id_type.Text;
            cs.id_number = id_number.Text;

        }
}

Answer 1

一些变化：

 private void button5_Click(object sender, EventArgs e)
    {
        newAccountSearchByBVN.Customer cs; //no need to create new object, you'll be receiving it from server
        newAccountSearchByBVN.FetchInformationBVNService nacc = new newAccountSearchByBVN.FetchInformationBVNService();
        cs = nacc.GetCustomerNameWithBVN(bvn_search.Text); //instead of saving your Customer to string, save it to cs variable you already 
        if (cs != null) //check if you've received object, it's not null
        {
            //order was wrong. You want to populate text boxes, and you were taking data from text boxes here...
            fullname.Text = cs.fullname;
            address.Text = cs.address;
            city.Text = cs.city;
            state.Text = cs.state;
            id_type.Text = cs.id_type;
            id_number.Text = cs.id_number;

        }
}

额外提示，您应该考虑为正确的数据使用正确的类型。例如（id_type 和 id_number 不应该是 string，而是 int）

WebService 不会将信息填充到 Winform 上的文本字段中

WebService won't populate information into Textfield on Winform

c#

sql-server

web-services

web-reference