Excel阅读器无理由返回空值c＃

我用我的代码来读取Excel文件中的值有一个小问题。 我使用一个循环来读取每行的单元格和每个单元格的单元格。

excel文件中的第152行正确读取，但在第153行之后，每个单元格只能得到空值。

这是我的代码：

public DataTable parseExcelFile(string path,bool firstLineHeader) { DataTable values = new DataTable("Impayés"); Excel.Application appExcel = new Excel.Application(); Excel.Workbook wb = appExcel.Workbooks.Open(path, Type.Missing, Type.Missing, Type.Missing, Type.Missing,Type.Missing, Type.Missing, Type.Missing, Type.Missing,Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing); Excel.Worksheet sheet = (Excel.Worksheet)wb.Sheets["Feuil1"]; Excel.Range excelRange = sheet.UsedRange; bool premiere = firstLineHeader; foreach (Excel.Range row in excelRange.Rows) { if (!premiere) { int rowNumber = row.Row;//Récupération du numéro de ligne //Récupération des valeurs des cellules de la ligne en cours string groupe = Convert.ToString(row.Range["A" + rowNumber.ToString()].Value); if (groupe == null) MessageBox.Show("Eh c'est vide ! (Ligne "+ rowNumber.ToString() + ")"); string sousgroupe = Convert.ToString(row.Range["B" + rowNumber.ToString()].Value); string codeapporteur = Convert.ToString(row.Range["C" + rowNumber.ToString()].Value); string apporteur = Convert.ToString(row.Range["D" + rowNumber.ToString()].Value); string dossier = Convert.ToString(row.Range["E" + rowNumber.ToString()].Value); string siren = Convert.ToString(row.Range["F" + rowNumber.ToString()].Value); string client = Convert.ToString(row.Range["G" + rowNumber.ToString()].Value); string adresse = Convert.ToString(row.Range["H" + rowNumber.ToString()].Value); string localite = Convert.ToString(row.Range["I" + rowNumber.ToString()].Value); string cp = Convert.ToString(row.Range["J" + rowNumber.ToString()].Value); string ville = Convert.ToString(row.Range["K" + rowNumber.ToString()].Value); string telephone = string.Format("{0:00}{1:00}{2:00}{3:00}{4:00}", row.Range["L" + rowNumber.ToString()].Value, row.Range["M" + rowNumber.ToString()].Value,row.Range["N" + rowNumber.ToString()].Value,row.Range["O" + rowNumber.ToString()].Value,row.Range["P" + rowNumber.ToString()].Value); string etat = Convert.ToString(row.Range["Q" + rowNumber.ToString()].Value); string bic = Convert.ToString(row.Range["R" + rowNumber.ToString()].Value); string iban = Convert.ToString(row.Range["S" + rowNumber.ToString()].Value); RIB rib = new RIB(bic, iban); string domiciliationrib = Convert.ToString(row.Range["T" + rowNumber.ToString()].Value); string bienfinance = Convert.ToString(row.Range["U" + rowNumber.ToString()].Value); decimal mt_ht_fi = Convert.ToDecimal(row.Range["V" + rowNumber.ToString()].Value); decimal mt_ech = Convert.ToDecimal(row.Range["W" + rowNumber.ToString()].Value); string dateapp = Convert.ToString(row.Range["X" + rowNumber.ToString()].Value) + "/" + Convert.ToString(row.Range["Y" + rowNumber.ToString()].Value) + "/" + Convert.ToString(row.Range["Z" + rowNumber.ToString()].Value); string terme = Convert.ToString(row.Range["AA" + rowNumber.ToString()].Value); string premiereech = Convert.ToString(row.Range["AB" + rowNumber.ToString()].Value) + "/" + Convert.ToString(row.Range["AC" + rowNumber.ToString()].Value) + "/" + Convert.ToString(row.Range["AD" + rowNumber.ToString()].Value); string derniereech = Convert.ToString(row.Range["AE" + rowNumber.ToString()].Value) + "/" + Convert.ToString(row.Range["AF" + rowNumber.ToString()].Value) + "/" + Convert.ToString(row.Range["AG" + rowNumber.ToString()].Value); int nbimp = MyConverter.ToInt(Convert.ToString(row.Range["AH" + rowNumber.ToString()].Value)); decimal mt_imp_1 = Convert.ToDecimal(row.Range["AI" + rowNumber.ToString()].Value); string dateimpaye1 = Convert.ToString(row.Range["AJ" + rowNumber.ToString()].Value) + "/" + Convert.ToString(row.Range["AK" + rowNumber.ToString()].Value) + "/" + Convert.ToString(row.Range["AL" + rowNumber.ToString()].Value); int motifimpaye1 = MyConverter.ToInt(Convert.ToString(row.Range["AM" + rowNumber.ToString()].Value)); string dateimpaye2 = Convert.ToString(row.Range["AN" + rowNumber.ToString()].Value) + "/" + Convert.ToString(row.Range["AO" + rowNumber.ToString()].Value) + "/" + Convert.ToString(row.Range["AP" + rowNumber.ToString()].Value); int motifimpaye2 = MyConverter.ToInt(Convert.ToString(row.Range["AQ" + rowNumber.ToString()].Value)); string dateimpaye3 = Convert.ToString(row.Range["AR" + rowNumber.ToString()].Value) + "/" + Convert.ToString(row.Range["AS" + rowNumber.ToString()].Value) + "/" + Convert.ToString(row.Range["AT" + rowNumber.ToString()].Value); int motifimpaye3 = MyConverter.ToInt(Convert.ToString(row.Range["AU" + rowNumber.ToString()].Value)); DataRow dr = values.Rows.Add(groupe, sousgroupe, codeapporteur, apporteur, dossier, siren, client, adresse, localite, cp, ville, telephone, etat, bic, iban, domiciliationrib, bienfinance, mt_ht_fi, mt_ech, dateapp, terme, premiereech, derniereech, nbimp, mt_imp_1, dateimpaye1, motifimpaye1, dateimpaye2, motifimpaye2, dateimpaye3, motifimpaye3); } else { foreach (Excel.Range eRange in row.Range["A1:AU1"].Cells) { if (eRange.Value != "TEL2" && eRange.Value != "TEL3" && eRange.Value != "TEL4" && eRange.Value != "TEL5" && eRange.Value != "Col_21" && eRange.Value != "Col_22" && eRange.Value != "Col_25" && eRange.Value != "Col_26" && eRange.Value != "Col_28" && eRange.Value != "Col_29") values.Columns.Add(eRange.Value); } premiere = false; } } return values; } 

这是我的Excel文件的示例行：

Answer 1

尝试删除第152行，或者在文档中向上或向下移动它，并查看错误是否在该行之后。

如果您将该行移动到145，然后程序停在145行，那么我们发现问题的来源：这是数据。 该行可能有一个无效或不可读的字符，并使程序崩溃。 这应该是一个十进制或整数的行中的一个字母。

另外，每次运行循环时，都会实例化所有的string，小数和整数。 你应该在循环之前声明它们，然后在循环中设置它们的值。 这是一个很好的做法。