我正在使用accepted solution here将Excel工作表转换为数据表。如果我有“完美”的数据，这可以正常工作，但如果我的数据中间有一个空白单元格，那么它似乎会在每列中放入错误的数据。
我认为这是因为在下面的代码中：
row.Descendants<Cell>().Count()
是已填充的单元格数（不是所有列）AND：
GetCellValue(spreadSheetDocument, row.Descendants<Cell>().ElementAt(i));
似乎找到下一个填充的单元格（不一定是该索引中的内容）所以如果第一列为空并且我调用ElementAt（0），它将返回第二列中的值。
这是完整的解析代码。
DataRow tempRow = dt.NewRow();
for (int i = 0; i < row.Descendants<Cell>().Count(); i++)
{
tempRow[i] = GetCellValue(spreadSheetDocument, row.Descendants<Cell>().ElementAt(i));
if (tempRow[i].ToString().IndexOf("Latency issues in") > -1)
{
Console.Write(tempRow[i].ToString());
}
}
答案 0 :(得分：42)
这是有道理的，因为Excel不会为null的单元格存储值。如果使用Open XML SDK 2.0 Productivity Tool打开文件并将XML遍历到单元级别，您将看到只有具有数据的单元格才会出现在该文件中。
您可以选择在要遍历的单元格区域中插入空白数据，或者以编程方式找出已跳过的单元格并适当调整索引。
我在单元格引用A1和C1中创建了一个带有字符串的excel文档示例。然后我在Open XML Productivity Tool中打开了excel文档，这里是存储的XML：
<x:row r="1" spans="1:3"
xmlns:x="http://schemas.openxmlformats.org/spreadsheetml/2006/main">
<x:c r="A1" t="s">
<x:v>0</x:v>
</x:c>
<x:c r="C1" t="s">
<x:v>1</x:v>
</x:c>
</x:row>
在这里，您将看到数据对应于第一行，并且只为该行保存了两个单元格的数据。保存的数据对应于A1和C1，并且不保存具有空值的单元格。
要获得所需的功能，您可以像上面那样遍历单元格，但是您需要检查Cell引用的值，并确定是否已跳过任何单元格。为此，您需要两个实用程序函数来从单元格引用中获取列名称，然后将该列名称转换为基于零的索引：
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', ' ' };
/// <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>
/// 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，您可以迭代单元格并检查单元格引用与columnIndex的比较。如果它小于那么你将空白数据添加到tempRow，否则只需读入单元格中包含的值。 （注意：我没有测试下面的代码，但一般的想法应该有帮助）：
DataRow tempRow = dt.NewRow();
int columnIndex = 0;
foreach (Cell cell in row.Descendants<Cell>())
{
// Gets the column index of the cell with data
int cellColumnIndex = (int)GetColumnIndexFromName(GetColumnName(cell.CellReference));
if (columnIndex < cellColumnIndex)
{
do
{
tempRow[columnIndex] = //Insert blank data here;
columnIndex++;
}
while(columnIndex < cellColumnIndex);
}
tempRow[columnIndex] = GetCellValue(spreadSheetDocument, cell);
if (tempRow[i].ToString().IndexOf("Latency issues in") > -1)
{
Console.Write(tempRow[i].ToString());
}
columnIndex++;
}
答案 1 :(得分：19)
这是IEnumerable的一个实现，它应该做你想要的，编译和单元测试的。
///<summary>returns an empty cell when a blank cell is encountered
///</summary>
public IEnumerator<Cell> GetEnumerator()
{
int currentCount = 0;
// row is a class level variable representing the current
// DocumentFormat.OpenXml.Spreadsheet.Row
foreach (DocumentFormat.OpenXml.Spreadsheet.Cell cell in
row.Descendants<DocumentFormat.OpenXml.Spreadsheet.Cell>())
{
string columnName = GetColumnName(cell.CellReference);
int currentColumnIndex = ConvertColumnNameToNumber(columnName);
for ( ; currentCount < currentColumnIndex; currentCount++)
{
yield return new DocumentFormat.OpenXml.Spreadsheet.Cell();
}
yield return cell;
currentCount++;
}
}
以下是它所依赖的功能：
/// <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)
{
// 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>
/// Given just the column name (no row index),
/// it will return the zero based column index.
/// </summary>
/// <param name="columnName">Column Name (ie. A or AB)</param>
/// <returns>Zero based index if the conversion was successful</returns>
/// <exception cref="ArgumentException">thrown if the given string
/// contains characters other than uppercase letters</exception>
public static int ConvertColumnNameToNumber(string columnName)
{
Regex alpha = new Regex("^[A-Z]+$");
if (!alpha.IsMatch(columnName)) throw new ArgumentException();
char[] colLetters = columnName.ToCharArray();
Array.Reverse(colLetters);
int convertedValue = 0;
for (int i = 0; i < colLetters.Length; i++)
{
char letter = colLetters[i];
int current = i == 0 ? letter - 65 : letter - 64; // ASCII 'A' = 65
convertedValue += current * (int)Math.Pow(26, i);
}
return convertedValue;
}
把它扔进课堂并尝试一下。
答案 2 :(得分：15)
这是Waylon's answer的略微修改版本，也依赖于其他答案。它将他的方法封装在一个类中。
我改变了
IEnumerator<Cell> GetEnumerator()
到
IEnumerable<Cell> GetRowCells(Row row)
这是类，你不需要实例化它，它只是作为一个实用程序类：
public class SpreedsheetHelper
{
///<summary>returns an empty cell when a blank cell is encountered
///</summary>
public static IEnumerable<Cell> GetRowCells(Row row)
{
int currentCount = 0;
foreach (DocumentFormat.OpenXml.Spreadsheet.Cell cell in
row.Descendants<DocumentFormat.OpenXml.Spreadsheet.Cell>())
{
string columnName = GetColumnName(cell.CellReference);
int currentColumnIndex = ConvertColumnNameToNumber(columnName);
for (; currentCount < currentColumnIndex; currentCount++)
{
yield return new DocumentFormat.OpenXml.Spreadsheet.Cell();
}
yield return cell;
currentCount++;
}
}
/// <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)
{
// Match the column name portion of the cell name.
var regex = new System.Text.RegularExpressions.Regex("[A-Za-z]+");
var match = regex.Match(cellReference);
return match.Value;
}
/// <summary>
/// Given just the column name (no row index),
/// it will return the zero based column index.
/// </summary>
/// <param name="columnName">Column Name (ie. A or AB)</param>
/// <returns>Zero based index if the conversion was successful</returns>
/// <exception cref="ArgumentException">thrown if the given string
/// contains characters other than uppercase letters</exception>
public static int ConvertColumnNameToNumber(string columnName)
{
var alpha = new System.Text.RegularExpressions.Regex("^[A-Z]+$");
if (!alpha.IsMatch(columnName)) throw new ArgumentException();
char[] colLetters = columnName.ToCharArray();
Array.Reverse(colLetters);
int convertedValue = 0;
for (int i = 0; i < colLetters.Length; i++)
{
char letter = colLetters[i];
int current = i == 0 ? letter - 65 : letter - 64; // ASCII 'A' = 65
convertedValue += current * (int)Math.Pow(26, i);
}
return convertedValue;
}
}
现在，您可以通过这种方式获取所有行的单元格：
// skip the part that retrieves the worksheet sheetData
IEnumerable<Row> rows = sheetData.Descendants<Row>();
foreach(Row row in rows)
{
IEnumerable<Cell> cells = SpreedsheetHelper.GetRowCells(row);
foreach (Cell cell in cells)
{
// skip part that reads the text according to the cell-type
}
}
它将包含所有单元格，即使它们是空的。
答案 3 :(得分：5)
请参阅我的实施：
Row[] rows = worksheet.GetFirstChild<SheetData>()
.Elements<Row>()
.ToArray();
string[] columnNames = rows.First()
.Elements<Cell>()
.Select(cell => GetCellValue(cell, document))
.ToArray();
HeaderLetters = ExcelHeaderHelper.GetHeaderLetters((uint)columnNames.Count());
if (columnNames.Count() != HeaderLetters.Count())
{
throw new ArgumentException("HeaderLetters");
}
IEnumerable<List<string>> cellValues = GetCellValues(rows.Skip(1), columnNames.Count(), document);
//Here you can enumerate through the cell values, based on the cell index the column names can be retrieved.
使用此类收集HeaderLetters：
private static class ExcelHeaderHelper
{
public static string[] GetHeaderLetters(uint max)
{
var result = new List<string>();
int i = 0;
var columnPrefix = new Queue<string>();
string prefix = null;
int prevRoundNo = 0;
uint maxPrefix = max / 26;
while (i < max)
{
int roundNo = i / 26;
if (prevRoundNo < roundNo)
{
prefix = columnPrefix.Dequeue();
prevRoundNo = roundNo;
}
string item = prefix + ((char)(65 + (i % 26))).ToString(CultureInfo.InvariantCulture);
if (i <= maxPrefix)
{
columnPrefix.Enqueue(item);
}
result.Add(item);
i++;
}
return result.ToArray();
}
}
辅助方法是：
private static IEnumerable<List<string>> GetCellValues(IEnumerable<Row> rows, int columnCount, SpreadsheetDocument document)
{
var result = new List<List<string>>();
foreach (var row in rows)
{
List<string> cellValues = new List<string>();
var actualCells = row.Elements<Cell>().ToArray();
int j = 0;
for (int i = 0; i < columnCount; i++)
{
if (actualCells.Count() <= j || !actualCells[j].CellReference.ToString().StartsWith(HeaderLetters[i]))
{
cellValues.Add(null);
}
else
{
cellValues.Add(GetCellValue(actualCells[j], document));
j++;
}
}
result.Add(cellValues);
}
return result;
}
private static string GetCellValue(Cell cell, SpreadsheetDocument document)
{
bool sstIndexedcell = GetCellType(cell);
return sstIndexedcell
? GetSharedStringItemById(document.WorkbookPart, Convert.ToInt32(cell.InnerText))
: cell.InnerText;
}
private static bool GetCellType(Cell cell)
{
return cell.DataType != null && cell.DataType == CellValues.SharedString;
}
private static string GetSharedStringItemById(WorkbookPart workbookPart, int id)
{
return workbookPart.SharedStringTablePart.SharedStringTable.Elements<SharedStringItem>().ElementAt(id).InnerText;
}
该解决方案处理共享单元项目（SST索引单元格）。
答案 4 :(得分：2)
所有好例子。这是我正在使用的那个，因为我需要跟踪所有行，单元格，值和标题以进行关联和分析。
ReadSpreadsheet方法打开一个xlxs文件并浏览每个工作表，行和列。由于值存储在引用的字符串表中，因此我还明确地使用每个工作表。还使用了其他类：DSFunction和StaticVariables。后者保留使用的参数值，例如引用的'quotdouble'（quotdouble =“\ u0022”;）和'crlf'（crlf =“\ u000D”+“\ u000A”;）。
下面包含相关的DSFunction方法GetIntColIndexForLetter。它返回与字母名称对应的列索引的整数值，例如（A，B，AA，ADE等）。这与参数'ncellcolref'一起使用，以确定是否已跳过任何列，并为每个缺失的列输入空字符串值。
我还在临时存储在List对象中之前对值进行了一些清理（使用Replace方法）。
随后，我使用列名的哈希表（Dictionary）来提取不同工作表中的值，关联它们，创建规范化值，然后创建在我们的产品中使用的对象，然后将其存储为XML文件。这些都没有显示出来，但却是使用这种方法的原因。
public static class DSFunction {
/// <summary>
/// Creates an integer value for a column letter name starting at 1 for 'a'
/// </summary>
/// <param name="lettstr">Column name as letters</param>
/// <returns>int value</returns>
public static int GetIntColIndexForLetter(string lettstr) {
string txt = "", txt1="";
int n1, result = 0, nbeg=-1, nitem=0;
try {
nbeg = (int)("a".ToCharArray()[0]) - 1; //1 based
txt = lettstr;
if (txt != "") txt = txt.ToLower().Trim();
while (txt != "") {
if (txt.Length > 1) {
txt1 = txt.Substring(0, 1);
txt = txt.Substring(1);
}
else {
txt1 = txt;
txt = "";
}
if (!DSFunction.IsNumberString(txt1, "real")) {
nitem++;
n1 = (int)(txt1.ToCharArray()[0]) - nbeg;
result += n1 + (nitem - 1) * 26;
}
else {
break;
}
}
}
catch (Exception ex) {
txt = ex.Message;
}
return result;
}
}
public static class Extractor {
public static string ReadSpreadsheet(string fileUri) {
string msg = "", txt = "", txt1 = "";
int i, n1, n2, nrow = -1, ncell = -1, ncellcolref = -1;
Boolean haveheader = true;
Dictionary<string, int> hashcolnames = new Dictionary<string, int>();
List<string> colvalues = new List<string>();
try {
if (!File.Exists(fileUri)) { throw new Exception("file does not exist"); }
using (SpreadsheetDocument ssdoc = SpreadsheetDocument.Open(fileUri, true)) {
var stringTable = ssdoc.WorkbookPart.GetPartsOfType<SharedStringTablePart>().FirstOrDefault();
foreach (Sheet sht in ssdoc.WorkbookPart.Workbook.Descendants<Sheet>()) {
nrow = 0;
foreach (Row ssrow in ((WorksheetPart)(ssdoc.WorkbookPart.GetPartById(sht.Id))).Worksheet.Descendants<Row>()) {
ncell = 0;
ncellcolref = 0;
nrow++;
colvalues.Clear();
foreach (Cell sscell in ssrow.Elements<Cell>()) {
ncell++;
n1 = DSFunction.GetIntColIndexForLetter(sscell.CellReference);
for (i = 0; i < (n1 - ncellcolref - 1); i++) {
if (nrow == 1 && haveheader) {
txt1 = "-missing" + (ncellcolref + 1 + i).ToString() + "-";
if (!hashcolnames.TryGetValue(txt1, out n2)) {
hashcolnames.Add(txt1, ncell - 1);
}
}
else {
colvalues.Add("");
}
}
ncellcolref = n1;
if (sscell.DataType != null) {
if (sscell.DataType.Value == CellValues.SharedString && stringTable != null) {
txt = stringTable.SharedStringTable.ElementAt(int.Parse(sscell.InnerText)).InnerText;
}
else if (sscell.DataType.Value == CellValues.String) {
txt = sscell.InnerText;
}
else txt = sscell.InnerText.ToString();
}
else txt = sscell.InnerText;
if (txt != "") txt1 = txt.ToLower().Trim(); else txt1 = "";
if (nrow == 1 && haveheader) {
txt1 = txt1.Replace(" ", "");
if (txt1 == "table/viewname") txt1 = "tablename";
else if (txt1 == "schemaownername") txt1 = "schemaowner";
else if (txt1 == "subjectareaname") txt1 = "subjectarea";
else if (txt1.StartsWith("column")) {
txt1 = txt1.Substring("column".Length);
}
if (!hashcolnames.TryGetValue(txt1, out n1)) {
hashcolnames.Add(txt1, ncell - 1);
}
}
else {
txt = txt.Replace(((char)8220).ToString(), "'"); //special "
txt = txt.Replace(((char)8221).ToString(), "'"); //special "
txt = txt.Replace(StaticVariables.quotdouble, "'");
txt = txt.Replace(StaticVariables.crlf, " ");
txt = txt.Replace(" ", " ");
txt = txt.Replace("<", "");
txt = txt.Replace(">", "");
colvalues.Add(txt);
}
}
}
}
}
}
catch (Exception ex) {
msg = "notok:" + ex.Message;
}
return msg;
}
}
答案 5 :(得分：2)
字母代码是基本编码26，因此这应该可以将其转换为偏移量。
// Converts letter code (i.e. AA) to an offset
public int offset( string code)
{
var offset = 0;
var byte_array = Encoding.ASCII.GetBytes( code ).Reverse().ToArray();
for( var i = 0; i < byte_array.Length; i++ )
{
offset += (byte_array[i] - 65 + 1) * Convert.ToInt32(Math.Pow(26.0, Convert.ToDouble(i)));
}
return offset - 1;
}
答案 6 :(得分：1)
好吧，我不是这方面的专家，但其他答案对我来说似乎过度杀人，所以这是我的解决方案：
// Loop through each row in the spreadsheet, skipping the header row
foreach (var row in sheetData.Elements<Row>().Skip(1))
{
var i = 0;
string[] letters = new string[15] {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O" };
List<String> cellsList = new List<string>();
foreach (var cell in row.Elements<Cell>().ToArray())
{
while (cell.CellReference.ToString()[0] != Convert.ToChar(letters[i]))
{//accounts for multiple consecutive blank cells
cellsList.Add("");
i++;
}
cellsList.Add(cell.CellValue.Text);
i++;
}
string[] cells = cellsList.ToArray();
foreach(var cell in cellsList)
{
//display contents of cell, depending on the datatype you may need to call each of the cells manually
}
}
希望有人觉得这很有用！
答案 7 :(得分：1)
您可以使用此函数从传递标题索引的行中提取单元格：
public static Cell GetCellFromRow(Row r ,int headerIdx) {
string cellname = GetNthColumnName(headerIdx) + r.RowIndex.ToString();
IEnumerable<Cell> cells = r.Elements<Cell>().Where(x=> x.CellReference == cellname);
if (cells.Count() > 0)
{
return cells.First();
}
else {
return null;
}
}
public static string GetNthColumnName(int n)
{
string name = "";
while (n > 0)
{
n--;
name = (char)('A' + n % 26) + name;
n /= 26;
}
return name;
}
答案 8 :(得分：0)
我无法拒绝优化Amurra回答的子程序，以消除对正则表达式的需求。
第一个函数实际上并不需要，因为第二个函数可以接受单元格引用（C3）或列名称（C）（但仍然是一个很好的辅助函数）。索引也是基于一个（仅因为我们的实现使用一个基于行的方式与Excel直观匹配）。
/// <summary>
/// Given a cell name, return the cell column name.
/// </summary>
/// <param name="cellReference">Address of the cell (ie. B2)</param>
/// <returns>Column Name (ie. B)</returns>
/// <exception cref="ArgumentOutOfRangeException">cellReference</exception>
public static string GetColumnName(string cellReference)
{
// Advance from L to R until a number, then return 0 through previous position
//
for (int lastCharPos = 0; lastCharPos <= 3; lastCharPos++)
if (Char.IsNumber(cellReference[lastCharPos]))
return cellReference.Substring(0, lastCharPos);
throw new ArgumentOutOfRangeException("cellReference");
}
/// <summary>
/// Return one-based column index given a cell name or column name
/// </summary>
/// <param name="columnNameOrCellReference">Column Name (ie. A, AB3, or AB44)</param>
/// <returns>One based index if the conversion was successful; otherwise null</returns>
public static int GetColumnIndexFromName(string columnNameOrCellReference)
{
int columnIndex = 0;
int factor = 1;
for (int pos = columnNameOrCellReference.Length - 1; pos >= 0; pos--) // R to L
{
if (Char.IsLetter(columnNameOrCellReference[pos])) // for letters (columnName)
{
columnIndex += factor * ((columnNameOrCellReference[pos] - 'A') + 1);
factor *= 26;
}
}
return columnIndex;
}
答案 9 :(得分：0)
这是我的解决方案。我发现当上面缺少的字段位于行的末尾时，上面的效果似乎不太好。
假设Excel工作表中的第一行包含所有列（通过标题），则获取每行预期的列数（行== 1）。然后遍历数据行（行＆gt; 1）。处理丢失单元格的关键在于方法getRowCells，其中传入已知数量的列单元格以及要处理的当前行。
int columnCount = worksheetPart.Worksheet.Descendants<Row>().Where(r => r.RowIndex == 1).FirstOrDefault().Descendants<Cell>().Count();
IEnumerable<Row> rows = worksheetPart.Worksheet.Descendants<Row>().Where(r => r.RowIndex > 1);
List<List<string>> docData = new List<List<string>>();
foreach (Row row in rows)
{
List<Cell> cells = getRowCells(columnCount, row);
List<string> rowData = new List<string>();
foreach (Cell cell in cells)
{
rowData.Add(getCellValue(workbookPart, cell));
}
docData.Add(rowData);
}
方法getRowCells的当前限制是只能支持少于26列的工作表（行）。基于已知列计数的循环用于查找缺失的列（单元格）。如果找到，则将新的Cell值插入到单元集合中，新Cell的默认值为“”而不是“null”。然后返回修改后的Cell集合。
private static List<Cell> getRowCells(int columnCount, Row row)
{
const string COLUMN_LETTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
if (columnCount > COLUMN_LETTERS.Length)
{
throw new ArgumentException(string.Format("Invalid columnCount ({0}). Cannot be greater than {1}",
columnCount, COLUMN_LETTERS.Length));
}
List<Cell> cells = row.Descendants<Cell>().ToList();
for (int i = 0; i < columnCount; i++)
{
if (i < cells.Count)
{
string cellColumnReference = cells.ElementAt(i).CellReference.ToString();
if (cellColumnReference[0] != COLUMN_LETTERS[i])
{
cells.Insert(i, new Cell() { CellValue = new CellValue("") }); }
}
else
{
cells.Insert(i, new Cell() { CellValue = new CellValue("") });
}
}
return cells;
}
private static string getCellValue(WorkbookPart workbookPart, Cell cell)
{
SharedStringTablePart stringTablePart = workbookPart.SharedStringTablePart;
string value = (cell.CellValue != null) ? cell.CellValue.InnerXml : string.Empty;
if ((cell.DataType != null) && (cell.DataType.Value == CellValues.SharedString))
{
return stringTablePart.SharedStringTable.ChildElements[Int32.Parse(value)].InnerText;
}
else
{
return value;
}
}
答案 10 :(得分：0)
要读取空白单元格，我使用名为＆＃34; CN＆＃34;的变量。在行读取器外部和while循环中分配，我检查列索引是否大于或不来自我的变量，因为它在每个单元读取后递增。如果这不匹配，我正在用我想要的值填充我的专栏。这是我用来将空白单元格追踪到我尊重列值的技巧。这是代码：
public static DataTable ReadIntoDatatableFromExcel(string newFilePath)
{
/*Creating a table with 20 columns*/
var dt = CreateProviderRvenueSharingTable();
try
{
/*using stream so that if excel file is in another process then it can read without error*/
using (Stream stream = new FileStream(newFilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
using (SpreadsheetDocument spreadsheetDocument = SpreadsheetDocument.Open(stream, false))
{
var workbookPart = spreadsheetDocument.WorkbookPart;
var workbook = workbookPart.Workbook;
/*get only unhide tabs*/
var sheets = workbook.Descendants<Sheet>().Where(e => e.State == null);
foreach (var sheet in sheets)
{
var worksheetPart = (WorksheetPart)workbookPart.GetPartById(sheet.Id);
/*Remove empty sheets*/
List<Row> rows = worksheetPart.Worksheet.Elements<SheetData>().First().Elements<Row>()
.Where(r => r.InnerText != string.Empty).ToList();
if (rows.Count > 1)
{
OpenXmlReader reader = OpenXmlReader.Create(worksheetPart);
int i = 0;
int BTR = 0;/*Break the reader while empty rows are found*/
while (reader.Read())
{
if (reader.ElementType == typeof(Row))
{
/*ignoring first row with headers and check if data is there after header*/
if (i < 2)
{
i++;
continue;
}
reader.ReadFirstChild();
DataRow row = dt.NewRow();
int CN = 0;
if (reader.ElementType == typeof(Cell))
{
do
{
Cell c = (Cell)reader.LoadCurrentElement();
/*reader skipping blank cells so data is getting worng in datatable's rows according to header*/
if (CN != 0)
{
int cellColumnIndex =
ExcelHelper.GetColumnIndexFromName(
ExcelHelper.GetColumnName(c.CellReference));
if (cellColumnIndex < 20 && CN < cellColumnIndex - 1)
{
do
{
row[CN] = string.Empty;
CN++;
} while (CN < cellColumnIndex - 1);
}
}
/*stopping execution if first cell does not have any value which means empty row*/
if (CN == 0 && c.DataType == null && c.CellValue == null)
{
BTR++;
break;
}
string cellValue = GetCellValue(c, workbookPart);
row[CN] = cellValue;
CN++;
/*if any text exists after T column (index 20) then skip the reader*/
if (CN == 20)
{
break;
}
} while (reader.ReadNextSibling());
}
/*reader skipping blank cells so fill the array upto 19 index*/
while (CN != 0 && CN < 20)
{
row[CN] = string.Empty;
CN++;
}
if (CN == 20)
{
dt.Rows.Add(row);
}
}
/*escaping empty rows below data filled rows after checking 5 times */
if (BTR > 5)
break;
}
reader.Close();
}
}
}
}
}
catch (Exception ex)
{
throw ex;
}
return dt;
}
private static string GetCellValue(Cell c, WorkbookPart workbookPart)
{
string cellValue = string.Empty;
if (c.DataType != null && c.DataType == CellValues.SharedString)
{
SharedStringItem ssi =
workbookPart.SharedStringTablePart.SharedStringTable
.Elements<SharedStringItem>()
.ElementAt(int.Parse(c.CellValue.InnerText));
if (ssi.Text != null)
{
cellValue = ssi.Text.Text;
}
}
else
{
if (c.CellValue != null)
{
cellValue = c.CellValue.InnerText;
}
}
return cellValue;
}
public static int GetColumnIndexFromName(string columnNameOrCellReference)
{
int columnIndex = 0;
int factor = 1;
for (int pos = columnNameOrCellReference.Length - 1; pos >= 0; pos--) // R to L
{
if (Char.IsLetter(columnNameOrCellReference[pos])) // for letters (columnName)
{
columnIndex += factor * ((columnNameOrCellReference[pos] - 'A') + 1);
factor *= 26;
}
}
return columnIndex;
}
public static string GetColumnName(string cellReference)
{
/* Advance from L to R until a number, then return 0 through previous position*/
for (int lastCharPos = 0; lastCharPos <= 3; lastCharPos++)
if (Char.IsNumber(cellReference[lastCharPos]))
return cellReference.Substring(0, lastCharPos);
throw new ArgumentOutOfRangeException("cellReference");
}
代码适用于：
答案 11 :(得分：0)
添加了另一个实现，这次预先知道列数：
/// <summary>
/// Gets a list cells that are padded with empty cells where necessary.
/// </summary>
/// <param name="numberOfColumns">The number of columns expected.</param>
/// <param name="cells">The cells.</param>
/// <returns>List of padded cells</returns>
private static IList<Cell> GetPaddedCells(int numberOfColumns, IList<Cell> cells)
{
// Only perform the padding operation if existing column count is less than required
if (cells.Count < numberOfColumns - 1)
{
IList<Cell> padded = new List<Cell>();
int cellIndex = 0;
for (int paddedIndex = 0; paddedIndex < numberOfColumns; paddedIndex++)
{
if (cellIndex < cells.Count)
{
// Grab column reference (ignore row) <seealso cref="https://stackoverflow.com/a/7316298/674776"/>
string columnReference = new string(cells[cellIndex].CellReference.ToString().Where(char.IsLetter).ToArray());
// Convert reference to index <seealso cref="https://stackoverflow.com/a/848552/674776"/>
int indexOfReference = columnReference.ToUpper().Aggregate(0, (column, letter) => (26 * column) + letter - 'A' + 1) - 1;
// Add padding cells where current cell index is less than required
while (indexOfReference > paddedIndex)
{
padded.Add(new Cell());
paddedIndex++;
}
padded.Add(cells[cellIndex++]);
}
else
{
// Add padding cells when passed existing cells
padded.Add(new Cell());
}
}
return padded;
}
else
{
return cells;
}
}
使用以下方式致电：
IList<Cell> cells = GetPaddedCells(38, row.Descendants<Cell>().ToList());
其中38是所需的列数。
答案 12 :(得分：0)
使用以下代码成功运行：
string filePath = "test.xlsx"//your file path
//Open the Excel file using ClosedXML.
using (XLWorkbook workBook = new XLWorkbook(filePath))
{
//Read the first Sheet from Excel file.
IXLWorksheet workSheet = workBook.Worksheet(1);
//Create a new DataTable.
DataTable dt = new DataTable();
//Loop through the Worksheet rows.
bool firstRow = true;
foreach (IXLRow row in workSheet.Rows())
{
//Use the first row to add columns to DataTable.
if (firstRow)
{
foreach (IXLCell cell in row.Cells())
{
dt.Columns.Add(cell.Value.ToString());
}
firstRow = false;
}
else
{
//Add rows to DataTable.
dt.Rows.Add();
int i = 0;
//for (IXLCell cell in row.Cells())
for (int j = 1; j <= dt.Columns.Count; j++)
{
if (string.IsNullOrEmpty(row.Cell(j).Value.ToString()))
dt.Rows[dt.Rows.Count - 1][i] = "";
else
dt.Rows[dt.Rows.Count - 1][i] =
row.Cell(j).Value.ToString();
i++;
}
}
}
}