System.ArgumentOutOfRangeException:“索引和长度必须引用该字符串内的位置。 Arg_ParamName_Name”

Question

代码如下：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Management;
using System.IO;
namespace demo5
{
    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
                String DeviceName;
                Console.WriteLine("请输入你要查询的分区代码：");
                DeviceName = Console.ReadLine();
                SelectQuery selectQuery = new SelectQuery(string.Format("select * from win32_logicaldisk WHERE DeviceID ='{0}'",DeviceName.Substring(0,2)));
                ManagementObjectSearcher searcher = new ManagementObjectSearcher(selectQuery);
                ManagementObjectCollection diskcollection = searcher.Get();
                if (diskcollection != null && diskcollection.Count > 0)
                {
                    HardDiskPartition harddisk = null;
                    harddisk = new HardDiskPartition();
                    foreach (ManagementObject disk in searcher.Get()) //ManagementObject mobj in wmifind.Get()
                    {
                        harddisk.FreeSpace = Convert.ToDouble(disk["FreeSpace"]) / (1024 * 1024 * 1024);
                        harddisk.SumSpace = Convert.ToDouble(disk["Size"]) / (1024 * 1024 * 1024);
                        harddisk.PartitionName = disk["DeviceID"].ToString();                        // Console.WriteLine(("{0}  总空间：{1} GB,剩余:{2} GB", harddisk.PartitionName,harddisk.SumSpace, harddisk.FreeSpace);
                        Console.Write("{0}总空间：{1} GB,剩余:{2} GB", harddisk.PartitionName, Math.Round(harddisk.SumSpace), Math.Round(harddisk.FreeSpace));                    Console.ReadKey();
                }
                }
           
            //WqlObjectQuery wmiquery = new WqlObjectQuery("SELECT * FROM Win32_LogicalDisk WHERE DeviceID = 'C:'");
           
        }      
    }
    
}
在    String DeviceName;
                Console.WriteLine("请输入你要查询的分区代码：");
                DeviceName = Console.ReadLine();
                SelectQuery selectQuery = new SelectQuery(string.Format("select * from win32_logicaldisk WHERE DeviceID ='{0}'",DeviceName.Substring(0,2)));这一步就给我提示这个问题，难道是这个查询语句里的条件值必须得是方法中传参，不能这样子直接赋值的么

Answer 1

你检查下你DeviceName的长度有没有2，在SelectQuery selectQuery = new SelectQuery(string.Format("select * from win32_logicaldisk WHERE DeviceID ='{0}'",DeviceName.Substring(0,2)));这句前，加console.writeline(DeviceName.length)