C# datatable 导出到Excel
datatable导出到Excel
/// <summary> /// 将DataTable导出为Excel文件(.xls) /// </summary> /// <param name="dt">要导出的DataTable</param> public static void ErrorCrd_ExportToExcel(DataTable dt) { if (dt == null) return; Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application(); if (xlApp == null) { Msg.Warning("无法创建Excel对象，可能您的电脑未安装Excel"); return; } System.Windows.Forms.SaveFileDialog saveDia = new SaveFileDialog(); saveDia.Filter = "Excel|*.xls"; saveDia.Title = "导出为Excel文件"; if (saveDia.ShowDialog() == System.Windows.Forms.DialogResult.OK && !string.Empty.Equals(saveDia.FileName)) { Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks; Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet); Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1 Microsoft.Office.Interop.Excel.Range range = null; long totalCount = dt.Rows.Count; long rowRead = 0; float percent = 0; string fileName = saveDia.FileName; //写入标题 for (int i = 0; i < dt.Columns.Count; i++) { worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName; range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1]; //range.Interior.ColorIndex = 15;//背景颜色 range.Font.Bold = true;//粗体 range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter;//居中 //加边框 range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); //range.ColumnWidth = 4.63;//设置列宽 //range.EntireColumn.AutoFit();//自动调整列宽 //r1.EntireRow.AutoFit();//自动调整行高 } //写入内容 for (int r = 0; r < dt.DefaultView.Count; r++) { for (int i = 0; i < dt.Columns.Count; i++) { worksheet.Cells[r + 2, i + 1] = dt.DefaultView[r][i]; range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[r + 2, i + 1]; range.Font.Size = 9;//字体大小 //加边框 range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); range.EntireColumn.AutoFit();//自动调整列宽 } rowRead++; percent = ((float)(100 * rowRead)) / totalCount; System.Windows.Forms.Application.DoEvents(); } range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin; if (dt.Columns.Count > 1) { range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin; } try { workbook.Saved = true; workbook.SaveCopyAs(fileName); } catch (Exception ex) { Msg.ShowError("导出文件时出错,文件可能正被打开！ " + ex.Message); return; } workbooks.Close(); if (xlApp != null) { xlApp.Workbooks.Close(); xlApp.Quit(); int generation = System.GC.GetGeneration(xlApp); System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp); xlApp = null; System.GC.Collect(generation); } GC.Collect();//强行销毁 #region 强行杀死最近打开的Excel进程 System.Diagnostics.Process[] excelProc = System.Diagnostics.Process.GetProcessesByName("EXCEL"); System.DateTime startTime = new DateTime(); int m, killId = 0; for (m = 0; m < excelProc.Length; m++) { if (startTime < excelProc[m].StartTime) { startTime = excelProc[m].StartTime; killId = m; } } if (excelProc[killId].HasExited == false) { excelProc[killId].Kill(); } #endregion Msg.ShowInformation("导出成功!"); } }
Excel 数据导出（引）
using System; using System.Data; using System.Data.OleDb; namespace ZFSoft.Joint { public class ExcelIO { private int _ReturnStatus; private string _ReturnMessage; /// <summary> /// 执行返回状态 /// </summary> public int ReturnStatus { get { return _ReturnStatus; } } /// <summary> /// 执行返回信息 /// </summary> public string ReturnMessage { get { return _ReturnMessage; } } public ExcelIO() { } /// <summary> /// 导入EXCEL到DataSet /// </summary> /// <param name="fileName">Excel全路径文件名</param> /// <returns>导入成功的DataSet</returns> public DataTable ImportExcel(string fileName) { //判断是否安装EXCEL Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application(); if (xlApp == null) { _ReturnStatus = -1; _ReturnMessage = "无法创建Excel对象，可能您的计算机未安装Excel"; return null; } //判断文件是否被其他进程使用 Microsoft.Office.Interop.Excel.Workbook workbook; try { workbook = xlApp.Workbooks.Open(fileName, 0, false, 5, "", "", false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "", true, false, 0, true, 1, 0); } catch { _ReturnStatus = -1; _ReturnMessage = "Excel文件处于打开状态，请保存关闭"; return null; } //获得所有Sheet名称 int n = workbook.Worksheets.Count; string[] SheetSet = new string[n]; System.Collections.ArrayList al = new System.Collections.ArrayList(); for (int i = 1; i <= n; i++) { SheetSet[i - 1] = ((Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[i]).Name; } //释放Excel相关对象 workbook.Close(null, null, null); xlApp.Quit(); if (workbook != null) { System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook); workbook = null; } if (xlApp != null) { System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp); xlApp = null; } GC.Collect(); //把EXCEL导入到DataSet DataSet ds = new DataSet(); DataTable table = new DataTable(); string connStr = " Provider = Microsoft.Jet.OLEDB.4.0 ; Data Source = " + fileName + ";Extended Properties=Excel 8.0"; using (OleDbConnection conn = new OleDbConnection(connStr)) { conn.Open(); OleDbDataAdapter da; string sql = "select * from [" + SheetSet[0] + "$] "; da = new OleDbDataAdapter(sql, conn); da.Fill(ds, SheetSet[0]); da.Dispose(); table = ds.Tables[0]; conn.Close(); conn.Dispose(); } return table; } /// <summary> /// 把DataTable导出到EXCEL /// </summary> /// <param name="reportName">报表名称</param> /// <param name="dt">数据源表</param> /// <param name="saveFileName">Excel全路径文件名</param> /// <returns>导出是否成功</returns> public bool ExportExcel(string reportName, System.Data.DataTable dt, string saveFileName) { if (dt == null) { _ReturnStatus = -1; _ReturnMessage = "数据集为空！"; return false; } bool fileSaved = false; Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application(); if (xlApp == null) { _ReturnStatus = -1; _ReturnMessage = "无法创建Excel对象，可能您的计算机未安装Excel"; return false; } Microsoft.Office.Interop.Excel.Workbooks workbooks = xlApp.Workbooks; Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet); Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1];//取得sheet1 worksheet.Cells.Font.Size = 10; Microsoft.Office.Interop.Excel.Range range; long totalCount = dt.Rows.Count; long rowRead = 0; float percent = 0; worksheet.Cells[1, 1] = reportName; ((Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, 1]).Font.Size = 12; ((Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, 1]).Font.Bold = true; //写入字段 for (int i = 0; i < dt.Columns.Count; i++) { worksheet.Cells[2, i + 1] = dt.Columns[i].ColumnName; range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[2, i + 1]; range.Interior.ColorIndex = 15; range.Font.Bold = true; } //写入数值 for (int r = 0; r < dt.Rows.Count; r++) { for (int i = 0; i < dt.Columns.Count; i++) { worksheet.Cells[r + 3, i + 1] = dt.Rows[r][i].ToString(); } rowRead++; percent = ((float)(100 * rowRead)) / totalCount; } range = worksheet.get_Range(worksheet.Cells[2, 1], worksheet.Cells[dt.Rows.Count + 2, dt.Columns.Count]); range.BorderAround(Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous, Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin, Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic, null); if (dt.Rows.Count > 0) { range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].ColorIndex = Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic; range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].LineStyle = Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous; range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideHorizontal].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin; } if (dt.Columns.Count > 1) { range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].ColorIndex = Microsoft.Office.Interop.Excel.XlColorIndex.xlColorIndexAutomatic; range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].LineStyle = Microsoft.Office.Interop.Excel.XlLineStyle.xlContinuous; range.Borders[Microsoft.Office.Interop.Excel.XlBordersIndex.xlInsideVertical].Weight = Microsoft.Office.Interop.Excel.XlBorderWeight.xlThin; } //保存文件 if (saveFileName != "") { try { workbook.Saved = true; workbook.SaveCopyAs(saveFileName); fileSaved = true; } catch (Exception ex) { fileSaved = false; _ReturnStatus = -1; _ReturnMessage = "导出文件时出错,文件可能正被打开！ " + ex.Message; } } else { fileSaved = false; } //释放Excel对应的对象 if (range != null) { System.Runtime.InteropServices.Marshal.ReleaseComObject(range); range = null; } if (worksheet != null) { System.Runtime.InteropServices.Marshal.ReleaseComObject(worksheet); worksheet = null; } if (workbook != null) { System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook); workbook = null; } if (workbooks != null) { System.Runtime.InteropServices.Marshal.ReleaseComObject(workbooks); workbooks = null; } xlApp.Application.Workbooks.Close(); xlApp.Quit(); if (xlApp != null) { System.Runtime.InteropServices.Marshal.ReleaseComObject(xlApp); xlApp = null; } GC.Collect(); return fileSaved; } } }