■ SqlMapper 클래스의 GetRowParser 확장 메소드를 사용해 제네릭 타입 데이터의 .CSV 파일을 생성하는 방법을 보여준다.
▶ MainForm.cs
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using System; using System.Collections.Generic; using System.Data; using System.Data.OleDb; using System.IO; using System.Text; using DevExpress.Utils; using DevExpress.XtraEditors; using DevExpress.XtraGrid.Views.Grid; using Dapper; namespace TestProject { /// <summary> /// 메인 폼 /// </summary> public partial class MainForm : XtraForm { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 연결 /// </summary> private OleDbConnection connection; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainForm() /// <summary> /// 생성자 /// </summary> public MainForm() { InitializeComponent(); this.connection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=nwind.mdb"); this.gridView.InitializeView ( true, // Multi Select GridMultiSelectMode.CellSelect, // Grid Multi Select Mode DrawFocusRectStyle.CellFocus, // Draw Focus Rect Style true, // Show Indicator true, // Show Column Headers true, // Allow Column Moving true, // Allow Column Resizing true, // Allow Filter true, // Allow Sort false, // Allow Cell Merge EditorShowMode.Default, // Editor Show Mode false // Editable ); this.gridView.OptionsBehavior.AutoPopulateColumns = true; this.gridControl.DataSource = Order.GetOrderList(this.connection); this.gridView.BestFitColumns(); this.createButton.Click += createButton_Click; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 생성하기 버튼 클릭시 처리하기 - createButton_Click(sender, e) /// <summary> /// 생성하기 버튼 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void createButton_Click(object sender, EventArgs e) { string sql = "SELECT * FROM Orders"; WriteFile(this.connection, sql, null, 500, "D:\\", "Sample"); } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 헤더 라인 쓰기 - WriteHeaderLine(writer, rowDictionary) /// <summary> /// 헤더 라인 쓰기 /// </summary> /// <param name="writer">스트림 라이터</param> /// <param name="rowDictionary">행 딕셔너리</param> private void WriteHeaderLine(StreamWriter writer, IDictionary<string, object> rowDictionary) { int x = 0; foreach(KeyValuePair<string, object> keyValuePair in rowDictionary) { if(x > 0) { writer.Write(","); } if(x < rowDictionary.Count - 1) { writer.Write(keyValuePair.Key); } else { writer.WriteLine(keyValuePair.Key); } x++; } } #endregion #region 데이터 라인 쓰기 - WriteDataLine(writer, rowDictionary) /// <summary> /// 데이터 라인 쓰기 /// </summary> /// <param name="writer">스트림 라이터</param> /// <param name="rowDictionary">행 딕셔너리</param> private void WriteDataLine(StreamWriter writer, IDictionary<string, object> rowDictionary) { int x = 0; foreach(KeyValuePair<string, object> keyValuePair in rowDictionary) { if(x > 0) { writer.Write(","); } object valueObject = keyValuePair.Value; if(valueObject == null) { #region 값 객체가 NULL인 경우 처리한다. if(x < rowDictionary.Count - 1) { writer.Write(string.Empty); } else { writer.WriteLine(string.Empty); } #endregion } else { Type valueObjectType = valueObject?.GetType(); if(valueObjectType == typeof(DateTime)) { #region 값 객체 타입이 DateTime인 경우 처리한다. DateTime valueDateTime = (DateTime)valueObject; if(x < rowDictionary.Count - 1) { writer.Write(valueDateTime.ToString("yyyy-MM-dd HH:mm:ss")); } else { writer.WriteLine(valueDateTime.ToString("yyyy-MM-dd HH:mm:ss")); } #endregion } else if(valueObjectType == typeof(DateTime?)) { #region 값 객체 타입이 DateTime?인 경우 처리한다. DateTime? valueDateTime = (DateTime?)valueObject; if(valueDateTime.HasValue) { if(x < rowDictionary.Count - 1) { writer.Write(valueDateTime.Value.ToString("yyyy-MM-dd HH:mm:ss")); } else { writer.WriteLine(valueDateTime.Value.ToString("yyyy-MM-dd HH:mm:ss")); } } else { if(x < rowDictionary.Count - 1) { writer.Write(string.Empty); } else { writer.WriteLine(string.Empty); } } #endregion } else if(valueObjectType == typeof(string)) { #region 값 객체 타입이 string인 경우 처리한다. string valueString = (string)valueObject; if(valueString == null) { if(x < rowDictionary.Count - 1) { writer.Write(string.Empty); } else { writer.WriteLine(string.Empty); } } else { if(x < rowDictionary.Count - 1) { writer.Write($"\"{valueString.Replace("\r", string.Empty).Replace("\n", string.Empty)}\""); } else { writer.WriteLine($"\"{valueString.Replace("\r", string.Empty).Replace("\n", string.Empty)}\""); } } #endregion } else { #region 값 객체 타입이 기타인 경우 처리한다. if(x < rowDictionary.Count - 1) { writer.Write(valueObject); } else { writer.WriteLine(valueObject); } #endregion } } x++; } } #endregion #region 파일 쓰기 - WriteFile(connection, sql, condition, lineCountPerFile, saveDirectoryPath, fileName) /// <summary> /// 파일 쓰기 /// </summary> /// <param name="connection">연결</param> /// <param name="sql">SQL</param> /// <param name="condition">조건</param> /// <param name="lineCountPerFile">파일당 라인 수</param> /// <param name="saveDirectoryPath">저장 디렉토리 경로</param> /// <param name="fileName">파일 확장자가 없는 파일명</param> private void WriteFile(IDbConnection connection, string sql, object condition, int lineCountPerFile, string saveDirectoryPath, string fileName) { using(IDataReader reader = connection.ExecuteReader(sql, condition)) { int lineCount = 0; StreamWriter writer = null; try { while(reader.Read()) { int rest = lineCount % lineCountPerFile; if(rest == 0) { writer?.Dispose(); int sequence = lineCount / lineCountPerFile + 1; string actualFileName = $"{fileName}_{sequence}.csv"; string actualFilePath = Path.Combine(saveDirectoryPath, actualFileName); writer = new StreamWriter(actualFilePath, false, Encoding.UTF8); } var rowParser = reader.GetRowParser<dynamic>(); var row = rowParser(reader); IDictionary<string, object> rowDictionary = row as IDictionary<string, object>; if(rest == 0) { WriteHeaderLine(writer, rowDictionary); } WriteDataLine(writer, rowDictionary); lineCount++; } if(lineCount == 0) { string actualFileName = $"{fileName}_1.csv"; string actualFilePath = Path.Combine(saveDirectoryPath, actualFileName); writer = new StreamWriter(actualFilePath, false, Encoding.UTF8); } } finally { writer?.Dispose(); } } } #endregion } } |
