Question

我正在使用存储过程检索的数据填充下拉列表（ComboBox）。

DataTable dtCustomer = da.ExecuteProcedureWithRS("pCustomerList_s", p, parms); //get data
foreach (DataRow dr in dtCustomer.Rows) //loop through DataTable rows
{
    CustomerNameBox.Items.Add(dr[1]); //add customer name to combobox
}

这很容易。但是，每行的第0位是客户的ID，我也想跟踪它，并与CustomerNameBox中的名称相关联。

一位同事提到我可以再次下拉，隐藏它，然后执行以下操作：

foreach (DataRow dr in dtCustomer.Rows) //loop through DataTable rows
{
    CustomerIDBox.Items.Add(dr[0]); //add customer ID to combobox
    CustomerNameBox.Items.Add(dr[1]); //add customer name to combobox    
}

然后，我可以通过从NameBox中获取名称及IDBox中的ID来将名称与ID 1：1匹配 - 例如var id = CustomerIDBox.Items[16]; var name = CustomerNameBox.Items[16]

这对我来说似乎是个蠢货。我知道我可以使用Dictionary<string, int>或类似的方法存储键值对，但是否有某种方法可以使用单个ComboBox本地存储ID和名称？

Answer 1

试试这样：

其中 “键”和“值”是数据表中的列名

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Management;

namespace SystemInfo
{
    class wmiObject
    {
        static osDetails Program()
        {

            ManagementObjectCollection osDetailsCollection = getWMIObject("SELECT OSType, caption FROM Win32_OperatingSystem");
            osDetails Details = new osDetails();

            foreach (ManagementObject mo in osDetailsCollection)
            {
                Details.OSName = mo["Caption"].ToString();

            }

            osDetailsCollection = getWMIObject("SELECT Description, NumberOfLogicalProcessors, L3CacheSize from Win32_Processor");

            foreach (ManagementObject mo in osDetailsCollection)
            {
                Details.NumberOfLogicalProcessors = mo["NumberOfLogicalProcessors"].ToString();
                Details.L3CacheSize = mo["L3CacheSize"].ToString();
                Details.Description = mo["Description"].ToString();

            }
            ;

            return Details;
        }

        static ManagementObjectCollection getWMIObject(string query)
        {
            ManagementObjectSearcher objOSDetails = new ManagementObjectSearcher(query);
            ManagementObjectCollection osDetailsCollection = objOSDetails.Get();
            return osDetailsCollection;

        }

        class osDetails
        {
            public string Description;
            public string OSName;
            public string NumberOfLogicalProcessors;
            public string L3CacheSize;
        }

    }


}

OR with Loop

Severity    Code    Description Project File    Line
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   41
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   18
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   20
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   26
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   28
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   29
Error   CS7069  Reference to type 'Component' claims it is defined in 'System', but it could not be found   SystemInfo  C:\Users\Luke\Documents\GitHub\lgDns\lgDns\SystemInfo\SystemInfo\osDetails.cs   30

如何使用单个ComboBox存储ID和名称？

1 个答案: