数据表到列表<数据表>

时间:2018-08-09 10:56:04

标签: c# list datatable datarow datacolumn

我创建了一个数据表列表:

List<DataTable> dataTableList = new List<DataTable>();

我用列创建了一个临时数据表:

DataTable tmp = new DataTable();
tmp.Columns.Add("SenderCostCenter" , typeof(String));
tmp.Columns.Add("ActivityType" , typeof(String));
tmp.Columns.Add("Quantity" , typeof(String));
tmp.Columns.Add("Unit", typeof(String));
tmp.Columns.Add("Costcnter" , typeof(String));
tmp.Columns.Add("InternalOrder" , typeof(String));
tmp.Columns.Add("WBSElement" , typeof(String));
tmp.Columns.Add("SalesOrder", typeof(String));
tmp.Columns.Add("SalesOrderItem" , typeof(String));
tmp.Columns.Add("Text" , typeof(String));

然后我导入了一些数据并用它填充了tmp DataTable

我在一个循环中重复创建了tmp个DataTable 13次。
此循环在另一个循环内和外部循环内,在内循环之后,我想用tmp数据表填充DataTable列表。
这是我的代码:

dataTableList[fs1].Columns.Add("SenderCostSender" , typeof(String));
dataTableList[fs1].Columns.Add("ActivityType", typeof(String));
dataTableList[fs1].Columns.Add("Quantity", typeof(String));
dataTableList[fs1].Columns.Add("Unit", typeof(String));
dataTableList[fs1].Columns.Add("Costcenter", typeof(String));
dataTableList[fs1].Columns.Add("InternalOrder", typeof(String));
dataTableList[fs1].Columns.Add("WBSElement", typeof(String));
dataTableList[fs1].Columns.Add("SalesOrder", typeof(String));
dataTableList[fs1].Columns.Add("SalesOrderItem", typeof(String));
dataTableList[fs1].Columns.Add("Text" , typeof(String));
dataTableList[fs1] = tmp;

fs1是要遍历DataTableList的外部循环变量。


数据导入工作正常,但是当程序到达dataTableList[fs1].Columns.Add("SenderCostSender" , typeof(string));时,我遇到了System.ArgumentOutOfRangeException错误。

谢谢您的帮助。



这是完整的方法:(List<dataTable>是全局的)

 using (var fbd = new FolderBrowserDialog())
            {
                //Folder-Browser-Dialog öffnen
                DialogResult result = fbd.ShowDialog();
                if (result == DialogResult.OK && !string.IsNullOrWhiteSpace(fbd.SelectedPath))
                {
                    //Menge an Excel-Daten rausfinden
                    string[] files = System.IO.Directory.GetFiles(fbd.SelectedPath , "*.xlsx");
                    for (int fs1=0;fs1<=files.Length;fs1++)
                    {
                        //Excel Import
                        Microsoft.Office.Interop.Excel.Application application = new Microsoft.Office.Interop.Excel.Application();
                        Microsoft.Office.Interop.Excel.Workbook workbook = application.Workbooks.Open(files[fs1]);
                        Microsoft.Office.Interop.Excel._Worksheet _Worksheet = workbook.Sheets[1];
                        Microsoft.Office.Interop.Excel.Range range = _Worksheet.UsedRange;

                        //Neues DataTable 
                        DataTable tmp = new DataTable();
                        tmp.Columns.Add("SenderCostCenter" , typeof(String));
                        tmp.Columns.Add("ActivityType" , typeof(String));
                        tmp.Columns.Add("Quantity" , typeof(String));
                        tmp.Columns.Add("Unit", typeof(String));
                        tmp.Columns.Add("Costcnter" , typeof(String));
                        tmp.Columns.Add("InternalOrder" , typeof(String));
                        tmp.Columns.Add("WBSElement" , typeof(String));
                        tmp.Columns.Add("SalesOrder", typeof(String));
                        tmp.Columns.Add("SalesOrderItem" , typeof(String));
                        tmp.Columns.Add("Text" , typeof(String));

                        //DataTable füllen
                        for (int fs2 = 24; fs2 <= range.Rows.Count; fs2++)
                        {
                            //DataRow erstellen & füllen
                            DataRow dataRow = tmp.NewRow();
                            dataRow[0] = Convert.ToString(range.Cells[fs2, 2].Value2);
                            dataRow[1] = Convert.ToString(range.Cells[fs2, 3].Value2);
                            dataRow[2] = Convert.ToString(range.Cells[fs2, 4].Value2);
                            dataRow[3] = Convert.ToString(range.Cells[fs2, 5].Value2);
                            dataRow[4] = Convert.ToString(range.Cells[fs2, 6].Value2);
                            dataRow[5] = Convert.ToString(range.Cells[fs2, 7].Value2);
                            dataRow[6] = Convert.ToString(range.Cells[fs2, 8].Value2);
                            dataRow[7] = Convert.ToString(range.Cells[fs2, 9].Value2);
                            dataRow[8] = Convert.ToString(range.Cells[fs2, 10].Value2);
                            dataRow[9] = Convert.ToString(range.Cells[fs2, 11].Value2);
                            tmp.Rows.Add(dataRow);
                        }

                        //tmp DataTable in die Globale DataTable-List kopieren
                        dataTableList[fs1].Columns.Add("SenderCostSender" , typeof(String));
                        dataTableList[fs1].Columns.Add("ActivityType", typeof(String));
                        dataTableList[fs1].Columns.Add("Quantity", typeof(String));
                        dataTableList[fs1].Columns.Add("Unit", typeof(String));
                        dataTableList[fs1].Columns.Add("Costcenter", typeof(String));
                        dataTableList[fs1].Columns.Add("InternalOrder", typeof(String));
                        dataTableList[fs1].Columns.Add("WBSElement", typeof(String));
                        dataTableList[fs1].Columns.Add("SalesOrder", typeof(String));
                        dataTableList[fs1].Columns.Add("SalesOrderItem", typeof(String));
                        dataTableList[fs1].Columns.Add("Text" , typeof(String));
                        dataTableList[fs1] = tmp;
                    }
                }
            }
        }

1 个答案:

答案 0 :(得分:0)

DataTable   d = new DataTable();         
List<DataTable> l = new List<DataTable>();
l.Add(d);