我有一个包含单列和多行的Excel工作表，如：
000500114673HY340216-00 CT TAPING WORK DTYPE-OSKF 245 TWB.T H/C 37990110000250000100
我正在尝试通过我的C＃代码创建一个新的Excel文件，但没有得到所需的结果。在我的新Excel文件中，我需要六列，每列分配一个特定范围，例如第一列12，第二列20等等（也包括空格）。我使用text to column方法，但我无法将其解析为固定宽度。我的代码示例是：
xlAppNew = new Application();
xlAppNew.DisplayAlerts = true;
workbooks = xlAppNew.Workbooks;
workbook = workbooks.Open(@filepath, 0, true, 1, "", "", true,
Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t",
false, false, 0, true, 1, 0);
xlWorkSheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets.get_Item(1);
((Range)xlAppNew.Cells[1, 1]).EntireColumn.TextToColumns(Type.Missing,
Microsoft.Office.Interop.Excel.XlTextParsingType.xlFixedWidth,
Microsoft.Office.Interop.Excel.XlTextQualifier.xlTextQualifierNone,
Type.Missing, Type.Missing, Type.Missing, true, Type.Missing,
Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing,
Type.Missing);
我认为问题在于第四个最后一个参数，我无法正确提供的fieldinfo对象，我也使用了数组对象，但它产生了错误。我从这个问题4945621中获得了帮助。但那里没有提供确切的解决方案。
答案 0 :(得分：2)
实际上，我要做的是首先将DAT文件转换为Excel，然后通过我的C＃代码将其划分为固定数量的列。因此，在我的第一步中，我所做的是将DAT文件转换为具有单列和给定行数的Excel文件作为临时Excel文件。
xlAppNew1 = new Application();
xlAppNew1.DisplayAlerts = true;
workbooks1 = xlAppNew1.Workbooks;
workbook1 = workbooks1.Open(@filepath, 0, true, 1, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
xlAppNew1.ActiveWorkbook.SaveAs(@filepathNew, -4143, "", "", false, false, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange,
missing, missing, missing, missing, missing);
现在确保关闭你创建的COM对象的所有实例，否则会造成很多问题。其次在另一个函数中我打开了我的临时Excel文件，并且数据集中的所有数据然后与Range对象的帮助和以下方法：
range = range.get_Resize(range.Rows.Count, 9);
string[,] saRet = new string[range.Rows.Count, 9];
range.set_Value(Missing.Value, saRet);
整个代码有点像这样：
xlAppNew = new Application();
xlAppNew.DisplayAlerts = true;
workbooks = xlAppNew.Workbooks;
workbook = workbooks.Open(@filepathnew, 0, true, 1, "", "", true, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "\t", false, false, 0, true, 1, 0);
xlWorkSheet = (Microsoft.Office.Interop.Excel.Worksheet)workbook.Worksheets.get_Item(1);
if (getExtension.ToLower() == ".xls")
connString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + filepath_second + ";Extended Properties=\"Excel 8.0;HDR=YES;IMEX=1;\"";
else
connString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filepath_second + ";Extended Properties=Excel 12.0 Xml;HDR=Yes;IMEX=1;";
OleDbConnection con = new OleDbConnection(connString);
con.Open();
System.Data.DataTable dtSheet = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
string tname = dtSheet.Rows[0]["TABLE_NAME"].ToString();
OleDbDataAdapter ad = new OleDbDataAdapter(@"Select * FROM [" + tname + "];", con);
DataSet dset = new DataSet();
ad.Fill(dset);
range = xlWorkSheet.UsedRange;
range = range.get_Resize(range.Rows.Count, 9);
//Create an array.
string[,] saRet = new string[range.Rows.Count, 9];
//Fill the array.
for (int iRow = 0; iRow < range.Rows.Count - 1; iRow++)
{
for (int iCol = 0; iCol < 9; iCol++)
{
switch (iCol)
{
case 0:
saRet[iRow, iCol] = dset.Tables[0].Rows[iRow][0].ToString().Substring(3, 9);//iRow.ToString() + "|" + iCol.ToString();
break;
case 1:
saRet[iRow, iCol] = dset.Tables[0].Rows[iRow][0].ToString().Substring(12, 4);
break;
case 2:
saRet[iRow, iCol] = dset.Tables[0].Rows[iRow][0].ToString().Substring(16, 18);
break;
case 3:
saRet[iRow, iCol] = dset.Tables[0].Rows[iRow][0].ToString().Substring(34, 8);
break;
case 4:
saRet[iRow, iCol] = dset.Tables[0].Rows[iRow][0].ToString().Substring(42, 4);
break;
case 5:
saRet[iRow, iCol] = dset.Tables[0].Rows[iRow][0].ToString().Substring(46, 18);
break;
case 6:
saRet[iRow, iCol] = dset.Tables[0].Rows[iRow][0].ToString().Substring(64, 40);
break;
case 7:
saRet[iRow, iCol] = dset.Tables[0].Rows[iRow][0].ToString().Substring(104, 3);
break;
case 8:
saRet[iRow, iCol] = dset.Tables[0].Rows[iRow][0].ToString().Substring(107, 5);
break;
}
}
}
//Set the range value to the array.
range.set_Value(Missing.Value, saRet);
FieldInfo myf = typeof(MyNewService).GetField("saRet");//Fieldinfo object is also an important part
//**********************
((Range)xlAppNew.Cells[1, 1]).EntireColumn.TextToColumns(Type.Missing, Microsoft.Office.Interop.Excel.XlTextParsingType.xlFixedWidth, Microsoft.Office.Interop.Excel.XlTextQualifier.xlTextQualifierNone, Type.Missing, Type.Missing, Type.Missing, true, Type.Missing, Type.Missing, Type.Missing, myf, Type.Missing, Type.Missing, Type.Missing);
xlAppNew.ActiveWorkbook.SaveAs(@temp_path, -4143, "", "", false, false, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, missing, missing, missing, missing, missing);
希望能帮助他人节省时间。谢谢。