Question

我尝试将一个字符串[]添加到List

代码：

foreach (int software_id in softwarelist)
{
    String sqlstring = "SELECT SoftwareName, Task_idn_Install, Task_idn_Deinstall, KZ, ParameterFeld FROM TUI_Software WHERE Sw_idn = '" + software_id + "'";
    SqlCommand cmd1 = new SqlCommand(sqlstring, con);
    SqlDataReader result_sw_info = cmd1.ExecuteReader();

    if (result_sw_info.HasRows)
    {
        result_sw_info.Read();

        softwarename = result_sw_info[0].ToString();
        task_idn_install = result_sw_info[1].ToString();
        task_idn_deinstall = result_sw_info[2].ToString();
        indicator = result_sw_info[3].ToString();
        parameter = result_sw_info[4].ToString();

        string[] software_data = new string[] {sw_id, softwarename, task_idn_install, task_idn_deinstall, indicator, parameter };

        softwarelist_insert.Add(software_data);
    }
    result_sw_info.Close();
}

因此，softwarelist_insert中的键以0开头。但是如何在foreach中添加带有关键software_id的software_data。因为我想使用software_id标识列表中的arrys。

Answer 1

使用System.Collections.Generic Dictionary<string, string[]>代替List<string[]>。

var softwarelist_insert = new Dictionary<string, string[]>();
...
softwarelist_insert.Add(software_id, software_data);

更好的是，使用强类型对象而不是字符串[]。

public class SoftwareData {
  public string SoftwareName { get; set; }
  public string TaskIdnInstall { get; set; }
  ...
}

然后

var softwarelist_insert = new Dictionary<string, SoftwareData>();
...
var = new SoftwareData {
  SoftwareName = result_sw_info[0].ToString(),
  TaskIdnInstall = result_sw_info[1].ToString(),
}
softwarelist_insert.Add(software_id, data);

Answer 2

您可以创建自己的类型并向其添加数据。首先创建一个这样的类

public class softwarelist_insert_class
{
  public string ID {get;set;}
  public List<string>softwarelist_insert{get;set;}
}

然后您可以创建此类型的列表变量

List<softwarelist_insert_class> variable_name=new List<softwarelist_insert_class>();

然后你可以像这样添加数据：

List<string> software_data = List<string> {sw_id, softwarename, task_idn_install, task_idn_deinstall, indicator, parameter };

variable_name.Add({id,software_data});

使用特定键将数组添加到List

2 个答案: