Excel匯入和匯出
阿新 • • 發佈：2022-11-29
基於WebApi介面
呼叫：
try { MES.BLL.extend.TEST_PROJECT_EXTEND MaterialBLL = new MES.BLL.extend.TEST_PROJECT_EXTEND(); result = MaterialBLL.QueryAllocationproduct(identificationproduct); string[] Cellnames = new string[] { "產品名稱", "產品型號", "型別", "版本號", "生產資料名稱", "上傳時間" }; AllocationList = MaterialBLL.DataExcelToList(result.Tables[0]); DataTable dt = ExcelHelper.ListToDataTable(AllocationList); ExcelHelper.ExportExcel(dt, Cellnames); }
ListToDataTable：
public static DataTable ListToDataTable<T>(List<T> entitys) {//檢查實體集合不能為空 if (entitys == null || entitys.Count < 1) { return new DataTable(); } //取出第一個實體的所有Propertie Type entityType = entitys[0].GetType(); PropertyInfo[] entityProperties = entityType.GetProperties();//生成DataTable的structure //生產程式碼中，應將生成的DataTable結構Cache起來，此處略 DataTable dt = new DataTable("dt"); for (int i = 0; i < entityProperties.Length; i++) { //dt.Columns.Add(entityProperties[i].Name, entityProperties[i].PropertyType); dt.Columns.Add(entityProperties[i].Name); } //將所有entity新增到DataTable中 foreach (object entity in entitys) { //檢查所有的的實體都為同一型別 if (entity.GetType() != entityType) { throw new Exception("要轉換的集合元素型別不一致"); } object[] entityValues = new object[entityProperties.Length]; for (int i = 0; i < entityProperties.Length; i++) { entityValues[i] = entityProperties[i].GetValue(entity, null); } dt.Rows.Add(entityValues); } return dt; }
方法體：
//匯出 public static void ExportExcel(DataTable dt, string[] Cellnames) { if (dt != null) { Microsoft.Office.Interop.Excel.Application excel = new Microsoft.Office.Interop.Excel.Application(); if (excel == null) { return; } //設定為不可見，操作在後臺執行，為 true 的話會開啟 Excel excel.Visible = false; //開啟時設定為全屏顯式 //excel.DisplayFullScreen = true; //初始化工作簿 Microsoft.Office.Interop.Excel.Workbooks workbooks = excel.Workbooks; //新增加一個工作簿，Add（）方法也可以直接傳入引數 true Microsoft.Office.Interop.Excel.Workbook workbook = workbooks.Add(Microsoft.Office.Interop.Excel.XlWBATemplate.xlWBATWorksheet); //同樣是新增一個工作簿，但是會彈出儲存對話方塊 //Microsoft.Office.Interop.Excel.Workbook workbook = excel.Application.Workbooks.Add(true); //新增加一個 Excel 表(sheet) Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets[1]; //設定表的名稱 worksheet.Name = dt.TableName; try { //建立一個單元格 Microsoft.Office.Interop.Excel.Range range; int rowIndex = 1; //行的起始下標為 1 int colIndex = 1; //列的起始下標為 1 // worksheet.Cells[1, 1] = "列名1"; // worksheet.Cells[1, 2] = "列名2"; for (int i = 0; i < Cellnames.Length; i++) { worksheet.Cells[rowIndex, colIndex + i] = Cellnames[i]; } //設定列名 for (int i = 0; i < dt.Columns.Count; i++) { //設定第一行，即列名 //worksheet.Cells[rowIndex, colIndex + i] = dt.Columns[i].ColumnName; //獲取第一行的每個單元格 range = worksheet.Cells[rowIndex, colIndex + i]; //設定單元格的內部顏色 range.Interior.ColorIndex = 33; //字型加粗 range.Font.Bold = true; //設定為黑色 range.Font.Color = 0; //設定為宋體 range.Font.Name = "Arial"; //設定字型大小 range.Font.Size = 12; //水平居中 range.HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter; //垂直居中 range.VerticalAlignment = Microsoft.Office.Interop.Excel.XlVAlign.xlVAlignCenter; } //跳過第一行，第一行寫入了列名 rowIndex++; //寫入資料 for (int i = 0; i < dt.Rows.Count; i++) { for (int j = 0; j < dt.Columns.Count; j++) { worksheet.Cells[rowIndex + i, colIndex + j] = dt.Rows[i][j].ToString(); } } //設定所有列寬為自動列寬 //worksheet.Columns.AutoFit(); //設定所有單元格列寬為自動列寬 worksheet.Cells.Columns.AutoFit(); //worksheet.Cells.EntireColumn.AutoFit(); //是否提示，如果想刪除某個sheet頁，首先要將此項設為fasle。 excel.DisplayAlerts = false; //儲存寫入的資料，這裡還沒有儲存到磁碟 workbook.Saved = true; //設定匯出檔案路徑 //string path = HttpContext.Current.Server.MapPath("Export/"); string path = "D:\\debugMES\\API\\WebAPIMes\\Export\\"; //設定新建檔案路徑及名稱 string savePath = path + DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss") + ".xlsx"; //建立檔案 FileStream file = new FileStream(savePath, FileMode.CreateNew); //關閉釋放流，不然沒辦法寫入資料 file.Close(); file.Dispose(); //儲存到指定的路徑 workbook.SaveCopyAs(savePath); //還可以加入以下方法輸出到瀏覽器下載 FileInfo fileInfo = new FileInfo(savePath); OutputClient(fileInfo); } catch (Exception ex) { } finally { workbook.Close(false, Type.Missing, Type.Missing); workbooks.Close(); //關閉退出 excel.Quit(); //釋放 COM 物件 Marshal.ReleaseComObject(worksheet); Marshal.ReleaseComObject(workbook); Marshal.ReleaseComObject(workbooks); Marshal.ReleaseComObject(excel); worksheet = null; workbook = null; workbooks = null; excel = null; GC.Collect(); } } }
網頁下載：
public static void OutputClient(FileInfo file) { HttpContext.Current.Response.Buffer = true; HttpContext.Current.Response.Clear(); HttpContext.Current.Response.ClearHeaders(); HttpContext.Current.Response.ClearContent(); HttpContext.Current.Response.ContentType = "application/vnd.ms-excel"; //匯出到 .xlsx 格式不能用時，可以試試這個 //HttpContext.Current.Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"; HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}.xlsx", DateTime.Now.ToString("yyyy-MM-dd-HH-mm"))); HttpContext.Current.Response.Charset = "GB2312"; HttpContext.Current.Response.ContentEncoding = Encoding.GetEncoding("GB2312"); HttpContext.Current.Response.AddHeader("Content-Length", file.Length.ToString()); HttpContext.Current.Response.WriteFile(file.FullName); HttpContext.Current.Response.Flush(); HttpContext.Current.Response.Close(); }
匯入（Winform驗證）：
呼叫如果為：true不加表頭Cellnames
private void btn_imp_Click(object sender, EventArgs e)
{
string[] Cellnames = new string[] { "產品名稱", "產品型號", "型別", "版本號", "生產資料名稱", "上傳時間" };
GetDataFromExcelByCom(Cellnames, true);
}
方法體：
System.Data.DataTable GetDataFromExcelByCom(string[] Cellnames, bool hasTitle = false ) { OpenFileDialog openFile = new OpenFileDialog(); openFile.Filter = "Excel(*.xlsx)|*.xlsx|Excel(*.xls)|*.xls"; openFile.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop); openFile.Multiselect = false; if (openFile.ShowDialog() == DialogResult.Cancel) return null; var excelFilePath = openFile.FileName; Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application(); Microsoft.Office.Interop.Excel.Sheets sheets; object oMissiong = System.Reflection.Missing.Value; Microsoft.Office.Interop.Excel.Workbook workbook = null; System.Data.DataTable dt = new System.Data.DataTable(); try { if (app == null) return null; workbook = app.Workbooks.Open(excelFilePath, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong, oMissiong); sheets = workbook.Worksheets; //將資料讀入到DataTable中 Microsoft.Office.Interop.Excel.Worksheet worksheet = (Microsoft.Office.Interop.Excel.Worksheet)sheets.get_Item(1);//讀取第一張表 if (worksheet == null) return null; int iRowCount = worksheet.UsedRange.Rows.Count; int iColCount = worksheet.UsedRange.Columns.Count; //生成列頭 for (int i = 0; i < iColCount; i++) { //var name = "column" + i; var name = Cellnames[i]; if (hasTitle) { var txt = ((Microsoft.Office.Interop.Excel.Range)worksheet.Cells[1, i + 1]).Text.ToString(); if (!string.IsNullOrWhiteSpace(txt)) name = txt; } while (dt.Columns.Contains(name)) name = name + "_1";//重複行名稱會報錯。 dt.Columns.Add(new DataColumn(name, typeof(string))); } //生成行資料 Microsoft.Office.Interop.Excel.Range range; int rowIdx = hasTitle ? 2 : 1; for (int iRow = rowIdx; iRow <= iRowCount; iRow++) { DataRow dr = dt.NewRow(); for (int iCol = 1; iCol <= iColCount; iCol++) { range = (Microsoft.Office.Interop.Excel.Range)worksheet.Cells[iRow, iCol]; dr[iCol - 1] = (range.Value2 == null) ? "" : range.Text.ToString(); } dt.Rows.Add(dr); } dt1 = dt; dataGridView1.DataSource = dt; return dt; } catch { return null; } finally { workbook.Close(false, oMissiong, oMissiong); System.Runtime.InteropServices.Marshal.ReleaseComObject(workbook); workbook = null; app.Workbooks.Close(); app.Quit(); System.Runtime.InteropServices.Marshal.ReleaseComObject(app); app = null; } }