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问题描述
我对C＃中的服务器端XSLX Excel文件的工作。在电子表格中，说有15列（单元）总的。在单电池列，一些值丢失。所以，第一行是我的头将正确地有15细胞。但我的数据行，部分细胞可能有空值，因此，开放的XML具有锯齿设置单元格的值。行1将具有完整15细胞，行2可能具有13细胞由于两个值都是空的。什么！我如何正确映射这些数据？它基本上都转移到左边，我的单元格的值是错误的。我在想什么？ 。好像他们正在开放XML术语坍塌
I'm working with xslx Excel file on the server side in C#. In a spreadsheet, say there are 15 columns (cells) total. In the rows of cells, some values are missing. So the first row is my header will properly have the 15 cells. But my data rows, some cells might have empty values, so Open XML has a "jagged" set of cells values. Row 1 will have the full 15 cells, Row 2 might have 13 cells since two of the values are empty. What! How do I map this data properly? It basically shifts everything to the left and my cell values are wrong. What am I missing? It seems like they are being "collapsed" in Open XML terminology.
WorkbookPart workbookPart = spreadSheetDocument.WorkbookPart;
IEnumerable<Sheet> sheets = spreadSheetDocument.WorkbookPart.Workbook.GetFirstChild<Sheets>().Elements<Sheet>();
string relationshipId = sheets.First().Id.Value;
WorksheetPart worksheetPart = (WorksheetPart)spreadSheetDocument.WorkbookPart.GetPartById(relationshipId);
Worksheet workSheet = worksheetPart.Worksheet;
SheetData sheetData = workSheet.GetFirstChild<SheetData>();
IEnumerable<Row> rows = sheetData.Descendants<Row>();
澄清：这是另一种方式来问这个问题。如果我想采取一个Excel文件的内容，并把它变成一个DataTable。我想数据的所有列正确排队。 ？我怎么能做到这一点。
CLARIFICATION: Here's another way to ask this question. What if I want to take the contents on an Excel file and put it into a DataTable. I want all the columns of data to line up correctly. How could I accomplish this?
这问法，比我在这里好：的
This question is asked better than I here: reading Excel Open XML is ignoring blank cells
推荐答案
你可以完成你想要的一种方法是找出最大的列索引所有的行，然后在所有的空单元格的值将填补空白。这将让你的所有列正确一字排开
One way you can accomplish what you want is to figure out the largest column index in all your rows and then fill in all the empty cell values will blanks. This will keep all your columns lined up properly.
下面是一个快速片段找出最大的列索引：
Here is a quick snippet to figure out the largest column index:
int? biggestColumnIndex = 0;
foreach (Row row in rows)
{
if (row.Descendants<Cell>().Any())
{
// Figure out the if this row has a bigger column index than the previous rows
int? columnIndex = GetColumnIndexFromName(((Cell)(row.LastChild)).CellReference);
biggestColumnIndex = columnIndex.HasValue && columnIndex > biggestColumnIndex ? columnIndex : biggestColumnIndex;
}
}
/// <summary>
/// Given just the column name (no row index), it will return the zero based column index.
/// Note: This method will only handle columns with a length of up to two (ie. A to Z and AA to ZZ).
/// A length of three can be implemented when needed.
/// </summary>
/// <param name="columnName">Column Name (ie. A or AB)</param>
/// <returns>Zero based index if the conversion was successful; otherwise null</returns>
public static int? GetColumnIndexFromName(string columnName)
{
int? columnIndex = null;
string[] colLetters = Regex.Split(columnName, "([A-Z]+)");
colLetters = colLetters.Where(s => !string.IsNullOrEmpty(s)).ToArray();
if (colLetters.Count() <= 2)
{
int index = 0;
foreach (string col in colLetters)
{
List<char> col1 = colLetters.ElementAt(index).ToCharArray().ToList();
int? indexValue = Letters.IndexOf(col1.ElementAt(index));
if (indexValue != -1)
{
// The first letter of a two digit column needs some extra calculations
if (index == 0 && colLetters.Count() == 2)
{
columnIndex = columnIndex == null ? (indexValue + 1) * 26 : columnIndex + ((indexValue + 1) * 26);
}
else
{
columnIndex = columnIndex == null ? indexValue : columnIndex + indexValue;
}
}
index++;
}
}
return columnIndex;
}
然后调用 InsetCellsForCellRange 方法后，你有最大的列索引，以填补所有空白单元格与空白单元格。然后在你的数据读取和他们都应该排队。 （所有辅助方法都低于 InsetCellsForCellRange 法）
Then call the InsetCellsForCellRange method after you have the biggest column index to fill in all the empty cells with blank cells. Then read in your data and they should all line up. (All helper methods are below the InsetCellsForCellRange method)
/// <summary>
/// Inserts cells if required for a rectangular range of cells
/// </summary>
/// <param name="startCellReference">Upper left cell of the rectangle</param>
/// <param name="endCellReference">Lower right cell of the rectangle</param>
/// <param name="worksheetPart">Worksheet part to insert cells</param>
public static void InsertCellsForCellRange(string startCellReference, string endCellReference, WorksheetPart worksheetPart)
{
uint startRow = GetRowIndex(startCellReference);
uint endRow = GetRowIndex(endCellReference);
string startColumn = GetColumnName(startCellReference);
string endColumn = GetColumnName(endCellReference);
// Insert the cells row by row if necessary
for (uint currentRow = startRow; currentRow <= endRow; currentRow++)
{
string currentCell = startColumn + currentRow.ToString();
string endCell = IncrementCellReference(endColumn + currentRow.ToString(), CellReferencePartEnum.Column);
// Check to make sure all cells exist in the range; if not create them
while (!currentCell.Equals(endCell))
{
if (GetCell(worksheetPart, currentCell) == null)
{
InsertCell(GetColumnName(currentCell), GetRowIndex(currentCell), worksheetPart);
}
// Move the reference to the next cell in the range
currentCell = IncrementCellReference(currentCell, CellReferencePartEnum.Column);
}
}
}
/// <summary>
/// Given a cell name, parses the specified cell to get the row index.
/// </summary>
/// <param name="cellReference">Address of the cell (ie. B2)</param>
/// <returns>Row Index (ie. 2)</returns>
public static uint GetRowIndex(string cellReference)
{
// Create a regular expression to match the row index portion the cell name.
Regex regex = new Regex(@"\d+");
Match match = regex.Match(cellReference);
return uint.Parse(match.Value);
}
/// <summary>
/// Given a cell name, parses the specified cell to get the column name.
/// </summary>
/// <param name="cellReference">Address of the cell (ie. B2)</param>
/// <returns>Column Name (ie. B)</returns>
public static string GetColumnName(string cellReference)
{
// Create a regular expression to match the column name portion of the cell name.
Regex regex = new Regex("[A-Za-z]+");
Match match = regex.Match(cellReference);
return match.Value;
}
/// <summary>
/// Increments the reference of a given cell. This reference comes from the CellReference property
/// on a Cell.
/// </summary>
/// <param name="reference">reference string</param>
/// <param name="cellRefPart">indicates what is to be incremented</param>
/// <returns></returns>
public static string IncrementCellReference(string reference, CellReferencePartEnum cellRefPart)
{
string newReference = reference;
if (cellRefPart != CellReferencePartEnum.None && !String.IsNullOrEmpty(reference))
{
string[] parts = Regex.Split(reference, "([A-Z]+)");
if (cellRefPart == CellReferencePartEnum.Column || cellRefPart == CellReferencePartEnum.Both)
{
List<char> col = parts[1].ToCharArray().ToList();
bool needsIncrement = true;
int index = col.Count - 1;
do
{
// increment the last letter
col[index] = Letters[Letters.IndexOf(col[index]) + 1];
// if it is the last letter, then we need to roll it over to 'A'
if (col[index] == Letters[Letters.Count - 1])
{
col[index] = Letters[0];
}
else
{
needsIncrement = false;
}
} while (needsIncrement && --index >= 0);
// If true, then we need to add another letter to the mix. Initial value was something like "ZZ"
if (needsIncrement)
{
col.Add(Letters[0]);
}
parts[1] = new String(col.ToArray());
}
if (cellRefPart == CellReferencePartEnum.Row || cellRefPart == CellReferencePartEnum.Both)
{
// Increment the row number. A reference is invalid without this componenet, so we assume it will always be present.
parts[2] = (int.Parse(parts[2]) + 1).ToString();
}
newReference = parts[1] + parts[2];
}
return newReference;
}
/// <summary>
/// Returns a cell Object corresponding to a specifc address on the worksheet
/// </summary>
/// <param name="workSheetPart">WorkSheet to search for cell adress</param>
/// <param name="cellAddress">Cell Address (ie. B2)</param>
/// <returns>Cell Object</returns>
public static Cell GetCell(WorksheetPart workSheetPart, string cellAddress)
{
return workSheetPart.Worksheet.Descendants<Cell>()
.Where(c => cellAddress.Equals(c.CellReference))
.SingleOrDefault();
}
/// <summary>
/// Inserts a new cell at the specified colName and rowIndex. If a cell
/// already exists, then the existing cell is returned.
/// </summary>
/// <param name="colName">Column Name</param>
/// <param name="rowIndex">Row Index</param>
/// <param name="worksheetPart">Worksheet Part</param>
/// <returns>Inserted Cell</returns>
public static Cell InsertCell(string colName, uint rowIndex, WorksheetPart worksheetPart)
{
return InsertCell(colName, rowIndex, worksheetPart, null);
}
/// <summary>
/// Inserts a new cell at the specified colName and rowIndex. If a cell
/// already exists, then the existing cells are shifted to the right.
/// </summary>
/// <param name="colName">Column Name</param>
/// <param name="rowIndex">Row Index</param>
/// <param name="worksheetPart">Worksheet Part</param>
/// <param name="cell"></param>
/// <returns>Inserted Cell</returns>
public static Cell InsertCell(string colName, uint rowIndex, WorksheetPart worksheetPart, Cell insertCell)
{
Worksheet worksheet = worksheetPart.Worksheet;
SheetData sheetData = worksheet.GetFirstChild<SheetData>();
string insertReference = colName + rowIndex;
// If the worksheet does not contain a row with the specified row index, insert one.
Row row;
if (sheetData.Elements<Row>().Where(r => r.RowIndex == rowIndex).Count() != 0)
{
row = sheetData.Elements<Row>().Where(r => r.RowIndex == rowIndex).First();
}
else
{
row = new Row() { RowIndex = rowIndex };
sheetData.Append(row);
}
Cell retCell = row.Elements<Cell>().FirstOrDefault(c => c.CellReference.Value == colName + rowIndex);
// If retCell is not null and we are not inserting a new cell, then just skip everything and return the cell
if (retCell != null)
{
// NOTE: if conditions are not combined because we want to skip the parent 'else when the outside 'if' is true.
// if retCell is not null and we are inserting a new cell, then move all existing cells to the right.
if (insertCell != null)
{
// Get all the cells in the row with equal or higher column values than the one being inserted.
// Add the cell to be inserted into the temp list and re-index all of the cells.
List<Cell> cells = row.Descendants<Cell>().Where(c => String.Compare(c.CellReference.Value, insertReference) >= 0).ToList();
cells.Insert(0, insertCell);
string cellReference = insertReference;
foreach (Cell cell in cells)
{
// Update the references for the rows cells.
cell.CellReference = new StringValue(cellReference);
IncrementCellReference(cellReference, CellReferencePartEnum.Column);
}
// actually insert the new cell into the row
retCell = row.InsertBefore(insertCell, retCell); // at this point, retCell still points to the row that had the insertReference
}
}
// Else retCell is null, this means no cell exists at the specified location so we need to put a new cell in that space.
// If a cell was passed into this method, then it will be inserted. If not, a new one will be inserted.
else
{
// Cells must be in sequential order according to CellReference. Determine where to insert the new cell.
// Sequencial order can't be string comparison order, has to be Excel order ("A", "B", ... "AA", "BB", etc)
Cell refCell = null;
foreach (Cell cell in row.Elements<Cell>())
{
string cellColumn = Regex.Replace(cell.CellReference.Value, @"\d", "");
if (colName.Length <= cellColumn.Length && string.Compare(cell.CellReference.Value, insertReference, true) > 0)
{
refCell = cell;
break;
}
}
// Insert cell parameter is supplied, otherwise, create a new cell
retCell = insertCell ?? new Cell() { CellReference = insertReference };
row.InsertBefore(retCell, refCell);
}
return retCell;
}
//Other missing pieces
public enum CellReferencePartEnum
{
None,
Column,
Row,
Both
}
private static List<char> Letters = new List<char>() { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', ' ' };
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