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檢查文件是否存在並更新表列

[英]Check if File exists and update the table column

我有一個表 [dbo].[Missing_MyFastor],其中包含以下信息。

sdukey                            srcDocPath                           docName            IsExists
44276482    \\172.17.22.159\images33\h_drive\2003\lrg03\    LRG03-FA35880406_280A-1P.TIF    0
44276483    \\172.17.22.159\images33\h_drive\2003\lrg03\    LRG03-FA35880429_280A-1P.TIF    0
44276484    \\172.17.22.159\images33\h_drive\2003\lrg03\    LRG03-FA35896269_280A-1P.TIF    0
44276485    \\172.17.22.159\images33\h_drive\2003\lrg03\    LRG03-FA35896271_280A-1P.TIF    0
44276486    \\172.17.22.159\images33\h_drive\2003\lrg03\    LRG03-FA35896276_280A-1P.TIF    0

我必須編寫 C# 腳本來檢查文件是否存在並更新 IsExists=1 如果存在。 否則忽略。 同時更新 where 子句應該在 sdukey 上。 我應該迭代每一行。 我需要幫助在每個迭代級別從 DataTable 獲取 sdukey 和文件路徑。

我的代碼:

#region Namespaces
using System;
using System.Data;
using Microsoft.SqlServer.Dts.Runtime;
using System.Windows.Forms;
using System.IO;
using System.Data.SqlClient;
#endregion

namespace ST_241de8cb1bbf41e9bfbfa9800831fe10
{
public void Main()
        {
SqlConnection con = new SqlConnection("Server=AZABCD001;Database=TRDDataMart;Trusted_Connection=True;");
            SqlCommand count = new SqlCommand("select count(1) from [dbo].[Missing_MyFastor]", con);
            SqlCommand query = new SqlCommand("with cte(Id,Folder_FileName) as (select  row_number() Over(order by sdukey asc) RN,CAST(srcDocPath AS VARCHAR)+docName as DN from  [dbo].[Missing_MyFastor]) select top 10 * from cte",con);
            con.Open();
            count.CommandTimeout = 0;
            int x = (int)count.ExecuteScalar();
            SqlDataAdapter da = new SqlDataAdapter(query);
            DataTable dataTable = new DataTable();
            da.Fill(dataTable);

            foreach(DataRow row in dataTable.Rows)
            {
                for (int j = 0; j < dataTable.Columns.Count; j++)
                {
                    Console.WriteLine(row[j].ToString() + " ");

                    string filepath = row[j].ToString();

                    if(File.Exists(filepath))
                    {   
                        string q= "update [dbo].[Missing_MyFastor] set IsExists=1 WHERE sdukey="+ row[j].ToString();
                        SqlCommand update = new SqlCommand(q, con);

                        update.ExecuteNonQuery();
                    }
                }

            }
            //int i = 0;
            //while(i<=x)
            //{

            //}            

            Dts.TaskResult = (int)ScriptResults.Success;
        }           
    }
}

您現在正在檢查每列值的路徑中是否存在文件(當然文件"44276482""\\172.17.22.159\images33\h_drive\2003\lrg03\""LRG03-FA35880406_280A-1P.TIF" , 或"0"存在)。

您需要從行中提取路徑和文件名列值,將它們組合成完整文件路徑,然后檢查完整文件路徑下的文件是否存在:

foreach (var row in dataTable.Rows)
{
    string path = row["srcDocPath"].ToString();
    string fileName = row["docName"].ToString();
    string filePath = Path.Combine(path, fileName);
    if (File.Exists(filePath))
    {
        string sduKey = row["sdukey"].ToString();
        // Now you have the sduKey of the row with an existing file.
        // Preferably store the keys in a list and update them all at once 
        // with a single command, instead of doing it separately in every iteration.
    }
}

您沒有在 select 查詢中返回sdukey ,因此請更改 select 查詢以包含它,如下所示:

with cte(Id, sdukey, Folder_FileName) as (select  row_number() Over(order by sdukey asc) RN, sdukey, CAST(srcDocPath AS VARCHAR(1000))+ docName as DN from  [dbo].[Missing_MyFastor]) select top 10 * from cte

獲得具有sdukey的結果集后,您可以在更新查詢和foreach中使用它:

foreach (DataRow row in dataTable.Rows)
  {
    string path = row["Folder_FileName"].ToString();              
    if (File.Exists(path))
      {
         string sduKey = row["sdukey"].ToString();
         string q = "update [dbo].[Missing_MyFastor] set IsExists=1 WHERE sdukey=" + sduKey.ToString();
         SqlCommand update = new SqlCommand(q, con);

         update.ExecuteNonQuery();
      }
   }

旁注:

在 select 查詢中,您使用cte只是為每一行分配唯一的 id,除了我看不到它有任何用途。 您可以檢查是否可以直接從查詢中返回表數據,如下所示 -

select sdukey, CAST(srcDocPath AS VARCHAR(1000))+ docName as Folder_FileName from  [dbo].[Missing_MyFastor]

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