Question

我想使用linq，其中条件多值由数组字符串为split(',') 我列出了文件夹中数据文件的数据。（不在数据库中）

代码c＃

public List<sFile> GettingFiles(string path)
{
    //Read File in folder
    List<sFile> allfile = new List<sFile>(); 
    DirectoryInfo di = new DirectoryInfo(path);
    FileInfo[] fileinfo = di.GetFiles("*.*");

    foreach (FileInfo item in fileinfo)
    {
        allfile.Add(new sFile
        {
            FileName = item.Name,
            Seq = int.Parse(item.Name.Substring(12, item.Name.Length - 12)),
            PmnCode = item.Name.Substring(7, item.Name.Length - 12),
            Path = item.DirectoryName,
            Size = formatSize(item.Length),
            SizeInt = int.Parse(item.Length.ToString())
        });
    }
    return allfile;
}

public void btnQuery_Click(object sender, EventArgs e)
{
    List<sFile> allFiles = GettingFiles(path); //List file in Folder
    string pmnCode = txtPMNCode.Text.ToString(); //AAAA, BBBBB, CCCCC, DDDDD
    string[] subPmnCode = pmnCode.Split(',');
    string totalPmnCode = string.Empty;

    foreach (string item2 in subPmnCode)
    {
        var queryData = from d in allFiles.AsQueryable()
                    where (d.PmnCode.Contains(item2))
                    select d;                       

        //Add Column
        DataTable dt = new DataTable();
        dt.Columns.Add(enmField.NAME.ToString());
        dt.Columns.Add(enmField.SIZE.ToString());
        dt.Columns.Add(enmField.MODIFY_DATE.ToString());
        dt.Columns.Add(enmField.PATH.ToString());

        DataRow myRow = dt.NewRow();

        foreach (sFile item in queryData.ToList())
        {
             myRow = dt.NewRow();
             myRow[enmField.NAME.ToString()] = item.FileName.Trim();
             myRow[enmField.SIZE.ToString()] = item.Size.Trim();
             myRow[enmField.MODIFY_DATE.ToString()] = item.Date;
             myRow[enmField.PATH.ToString()] = item.Path.Trim() + "\\" + item.FileName.Trim();
     dt.Rows.Add(myRow);
        }

        gvDetail.DataSource = dt;
        gvDetail.DataBind();
    }
}

示例数据

Pmn Code
AAAAA
BBBBB
CCCCC
DDDDD

我想查询pmn_code的条件是AAAAA，BBBBB，DDDDD 我想要显示数据

var queryData = from d in allFiles.AsQueryable()
                where (d.PmnCode.Contains("AAAAA") &&
                d.PmnCode.Contains("BBBBB") &&
                d.PmnCode.Contains("DDDDD")
)
                select d;

但我不能通过结果查询数组字符串。我如何使用数组linq？

请帮帮我。谢谢提前;）

Answer 1

也许你可以试试：

var queryData = from p in allFiles.AsQueryable()
                where subPmnCode.Any(val => p.PmnCode.Contains(val))
                select p;

Answer 2

docker stop $(docker ps -q)
docker rm $(docker ps -a -q)

检查d是否与subPmnCode数组中的任何元素匹配。我使用trim来确保我们忽略通过使用逗号分隔符将字符串拆分为数组而生成的空格

LINQ：我怎样才能通过数组字符串使用条件多值的用户？

2 个答案: