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using System;
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using System.Collections.Generic;
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using System.Data;
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using System.IO;
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using System.IO.MemoryMappedFiles;
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using System.Text;
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using WorkData.Entity;
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#region 文件说明
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/*-----------------------------------------------------
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* 版权所有 （c） 2024 jdfcd
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* CLR版本 4.0.30319.42000
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* 命名空间 DQ.Construction.NewLook.Utility
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*
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* 创建者：pnpe
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* 电子邮件：pnpe@qq.com
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* 创建时间：2024/12/31 10:38:45
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*/
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#endregion 文件说明
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namespace WellWorkDataUI
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{
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public class ResultDataInfo
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{
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public int Code { get; set; }
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public string Msg { get; set; }
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public object Data { get; set; }
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}
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public class LasHelper
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{
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//读取las
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public static ResultDataInfo LasFileToDataTable(ref DataTable table, string filename, string charset, int rowindex)
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{
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ResultDataInfo result = new ResultDataInfo();
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List<string> columnNames = new List<string>();
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try
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{
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long length = new FileInfo(filename).Length;
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using (MemoryMappedFile mmf = MemoryMappedFile.CreateFromFile(filename, FileMode.Open, Guid.NewGuid().ToString()))
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using (MemoryMappedViewStream stream = mmf.CreateViewStream(0, length))
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using (StreamReader reader = new StreamReader(stream, Encoding.GetEncoding(charset)))
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{
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int lineindex = 0;
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bool isReadHeader = false;
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bool isReadBody = false;
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string strLine = string.Empty;
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while (!reader.EndOfStream)
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{
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string str = reader.ReadLine();
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if (string.IsNullOrWhiteSpace(str))
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{
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continue;
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}
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else if (str.StartsWith("~C") || str.StartsWith("~Curve"))
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{
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isReadHeader = true;
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continue;
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}
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else if (!isReadHeader)
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{
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continue;
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}
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else if (str.StartsWith("~A") || str.StartsWith("~Ascii"))
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{
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isReadBody = true;
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table.Columns.Clear();
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if (columnNames.Count == 0)
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{
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result.Code = 0;
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result.Msg = $"文件{filename}列读取失败,已跳过文件,{Environment.NewLine}";
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return result;
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}
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//说明表头写完了
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for (int i = 0; i < columnNames.Count; i++)
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{
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table.Columns.Add(columnNames[i]);
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}
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continue;
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}
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if (isReadHeader && !isReadBody)
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{
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//判断表头，对于小数点处理和冒号处理
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string colName = str.Replace(":", string.Empty);
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colName = colName.Split('.')[0];
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if (colName.StartsWith("#"))
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{
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continue;
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}
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colName = colName.Trim().ToUpper();
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if (!columnNames.Contains(colName))
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{
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columnNames.Add(colName);
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}
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else
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{
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//存在重复列名
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table.Columns.Clear();
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result.Code = 0;
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result.Msg = $"文件{filename}存在重复列名{colName},已跳过文件,{Environment.NewLine}";
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return result;
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}
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continue;
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}
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strLine = str;
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string trimString = string.Join(",", strLine.Split(Constants.StringSplit.EmptySeparator, StringSplitOptions.RemoveEmptyEntries));
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string[] array = trimString.Split(Constants.StringSplit.Separator, StringSplitOptions.None);
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if (array.Length != columnNames.Count)
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{
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continue;
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}
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if (array.Length > 0)
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{
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table.Rows.Add(array);
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}
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lineindex++;
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}
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}
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}
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catch (Exception e)
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{
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result.Code = 0;
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result.Msg = e.Message;
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Console.WriteLine(e.ToString());
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}
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result.Code = 1;
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return result;
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}
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/// <summary>
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/// las文件转List<WellCurve>
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/// </summary>
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public static IEnumerable<WellCurve> LasFileToList(string jh, string filename, string charset)
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{
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if (!File.Exists(filename))
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{
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yield break;
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}
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using (MemoryMappedFile mmf = MemoryMappedFile.CreateFromFile(filename, FileMode.Open, Guid.NewGuid().ToString()))
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using (MemoryMappedViewStream stream = mmf.CreateViewStream(0, new FileInfo(filename).Length))
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using (StreamReader reader = new StreamReader(stream, Encoding.GetEncoding(charset)))
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{
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List<string> columnNames = new List<string>();
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bool isReadHeader = false;
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bool isReadBody = false;
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while (!reader.EndOfStream)
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{
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string str = reader.ReadLine();
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if (string.IsNullOrWhiteSpace(str))
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{
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continue;
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}
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if (str.StartsWith("~C") || str.StartsWith("~Curve"))
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{
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isReadHeader = true;
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continue;
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}
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else if (!isReadHeader)
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{
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continue;
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}
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else if (str.StartsWith("~A") || str.StartsWith("~Ascii"))
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{
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isReadBody = true;
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if (columnNames.Count == 0)
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{
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throw new Exception($"文件{filename} 列名为空！");
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}
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continue;
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}
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if (isReadHeader && !isReadBody)
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{
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string colName = str.Replace(":", string.Empty);
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colName = colName.Split('.')[0];
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if (colName.StartsWith("#"))
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{
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continue;
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}
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colName = colName.Trim().ToUpper();
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if (!columnNames.Contains(colName))
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{
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columnNames.Add(colName);
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}
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else
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{
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throw new Exception($"文件{filename} 存在重复列名：{colName}");
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}
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continue;
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}
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// 数据体
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string trimString = string.Join(",", str.Split(Constants.StringSplit.EmptySeparator, StringSplitOptions.RemoveEmptyEntries));
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string[] array = trimString.Split(Constants.StringSplit.Separator, StringSplitOptions.None);
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if (array.Length != columnNames.Count)
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{
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continue;
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}
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if (!double.TryParse(array[0], out double depth))
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{
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continue;
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}
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var dic = new Dictionary<string, string>();
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for (int i = 1; i < array.Length; i++)
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{
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dic[columnNames[i]] = array[i];
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}
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yield return new WellCurve
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{
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JH = jh,
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DEPTH = depth,
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ColumnValues = dic,
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};
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}
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}
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}
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}
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}
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