使用 ExcelDataReader 从特定单元格开始读取 Excel 数据

如果你正在使用ExcelDataReader 3+你会发现没有任何方法可以AsDataSet()你的读取器对象，你还需要为ExcelDataReader.DataSet安装另一个包，然后你可以使用AsDataSet()方法。
也没有IsFirstRowAsColumnNames的属性，而是您需要将其设置在ExcelDataSetConfiguration内。

例：

using (var stream = File.Open(originalFileName, FileMode.Open, FileAccess.Read))
{
    IExcelDataReader reader;
    // Create Reader - old until 3.4+
    ////var file = new FileInfo(originalFileName);
    ////if (file.Extension.Equals(".xls"))
    ////    reader = ExcelDataReader.ExcelReaderFactory.CreateBinaryReader(stream);
    ////else if (file.Extension.Equals(".xlsx"))
    ////    reader = ExcelDataReader.ExcelReaderFactory.CreateOpenXmlReader(stream);
    ////else
    ////    throw new Exception("Invalid FileName");
    // Or in 3.4+ you can only call this:
    reader = ExcelDataReader.ExcelReaderFactory.CreateReader(stream)
    //// reader.IsFirstRowAsColumnNames
    var conf = new ExcelDataSetConfiguration
    {
        ConfigureDataTable = _ => new ExcelDataTableConfiguration
        {
            UseHeaderRow = true 
        }
    };
    var dataSet = reader.AsDataSet(conf);
    // Now you can get data from each sheet by its index or its "name"
    var dataTable = dataSet.Tables[0];
    //...
}

---

您可以像这样找到单元格引用的行号和列号：

var cellStr = "AB2"; // var cellStr = "A1";
var match = Regex.Match(cellStr, @"(?<col>[A-Z]+)(?<row>'d+)");
var colStr = match.Groups["col"].ToString();
var col = colStr.Select((t, i) => (colStr[i] - 64) * Math.Pow(26, colStr.Length - i - 1)).Sum();
var row = int.Parse(match.Groups["row"].ToString());

现在，您可以使用一些循环从该单元格读取数据，如下所示：

for (var i = row; i < dataTable.Rows.Count; i++)
{
    for (var j = col; j < dataTable.Columns.Count; j++)
    {
        var data = dataTable.Rows[i][j];
    }
}

---

更新：

您可以使用此配置在读取时过滤 Excel 工作表的行和列：

var i = 0;
var conf = new ExcelDataSetConfiguration
{
    UseColumnDataType = true,
    ConfigureDataTable = _ => new ExcelDataTableConfiguration
    {
        FilterRow = rowReader => fromRow <= ++i - 1,
        FilterColumn = (rowReader, colIndex) => fromCol <= colIndex,
        UseHeaderRow = true
    }
};

为了更清楚，我将从头开始。

我将依靠 https://github.com/ExcelDataReader/ExcelDataReader 中的示例代码，但进行了一些修改以避免不便。

以下代码检测文件格式，xls 或 xlsx。

FileStream stream = File.Open(filePath, FileMode.Open, FileAccess.Read);
IExcelDataReader excelReader;
//1. Reading Excel file
if (Path.GetExtension(filePath).ToUpper() == ".XLS")
{
    //1.1 Reading from a binary Excel file ('97-2003 format; *.xls)
    excelReader = ExcelReaderFactory.CreateBinaryReader(stream);
}
else
{
    //1.2 Reading from a OpenXml Excel file (2007 format; *.xlsx)
    excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);
}
//2. DataSet - The result of each spreadsheet will be created in the result.Tables
DataSet result = excelReader.AsDataSet();
//3. DataSet - Create column names from first row
excelReader.IsFirstRowAsColumnNames = false;

现在我们可以以更方便的方式访问文件内容。我为此使用数据表。以下是访问特定单元格并在控制台中打印其值的示例：

DataTable dt = result.Tables[0];
Console.WriteLine(dt.Rows[rowPosition][columnPosition]);

如果您不想执行数据表，则可以执行以下操作：

Console.WriteLine(result.Tables[0].Rows[rowPosition][columnPosition]);

重要的是不要尝试超出表的限制进行读取，为此您可以看到行数和列数，如下所示：

Console.WriteLine(result.Tables[0].Rows.Count);
Console.WriteLine(result.Tables[0].Columns.Count);

最后，完成后，您应该关闭阅读器并释放资源：

//5. Free resources (IExcelDataReader is IDisposable)
excelReader.Close();

我希望你觉得它有用。

（我知道这个问题已经过时了，但我做出这个贡献是为了增强知识库，因为关于这个库的特定实现的材料很少）。

适用于 ExcelDataReader v3.6.0 及更高版本。我挣扎了一下，以迭代行。所以这里有更多的关于上面的代码。希望它至少对少数人有帮助。

using (var stream = System.IO.File.Open(copyPath, FileMode.Open, FileAccess.Read))
                    {
                        IExcelDataReader excelDataReader = ExcelDataReader.ExcelReaderFactory.CreateReader(stream);
                        var conf = new ExcelDataSetConfiguration()
                        {
                            ConfigureDataTable = a => new ExcelDataTableConfiguration
                            {
                                UseHeaderRow = true
                            }
                        };
                        DataSet dataSet = excelDataReader.AsDataSet(conf);
                        //DataTable dataTable = dataSet.Tables["Sheet1"];
                        DataRowCollection row = dataSet.Tables["Sheet1"].Rows;
                        //DataColumnCollection col = dataSet.Tables["Sheet1"].Columns;
                        List<object> rowDataList = null;
                        List<object> allRowsList = new List<object>();
                        foreach (DataRow item in row)
                        {
                            rowDataList = item.ItemArray.ToList(); //list of each rows
                            allRowsList.Add(rowDataList); //adding the above list of each row to another list
                        }
                    }

一种方法是：

FileStream stream = File.Open(@"c:'working'test.xls", FileMode.Open, FileAccess.Read);
IExcelDataReader excelReader = ExcelReaderFactory.CreateBinaryReader(stream);
excelReader.IsFirstRowAsColumnNames = true;
DataSet result = excelReader.AsDataSet();

result.Tables包含工作表，result.tables[0].Rows包含单元格行。

我发现从特定列和行中读取很有用：

FileStream stream = File.Open(@"C:'Users'Desktop'ExcelDataReader.xlsx", FileMode.Open, FileAccess.Read);
IExcelDataReader excelReader = ExcelReaderFactory.CreateOpenXmlReader(stream);
DataSet result = excelReader.AsDataSet();
excelReader.IsFirstRowAsColumnNames = true;         
DataTable dt = result.Tables[0];
string text = dt.Rows[1][0].ToString();

使用 ExcelReaderFactory 3.1 及更高版本非常容易：

using (var openFileDialog1 = new OpenFileDialog { Filter = "Excel Workbook|*.xls;*.xlsx;*.xlsm", ValidateNames = true })
{
    if (openFileDialog1.ShowDialog() == DialogResult.OK)
    {
        var fs = File.Open(openFileDialog1.FileName, FileMode.Open, FileAccess.Read);
        var reader = ExcelReaderFactory.CreateBinaryReader(fs);
        var dataSet = reader.AsDataSet(new ExcelDataSetConfiguration
        {
            ConfigureDataTable = _ => new ExcelDataTableConfiguration
            {
                UseHeaderRow = true // Use first row is ColumnName here :D
            }
        });
        if (dataSet.Tables.Count > 0)
        {
            var dtData = dataSet.Tables[0];
            // Do Something
        }
    }
}

public static DataTable ConvertExcelToDataTable(string filePath, bool isXlsx = false)
{
    System.Text.Encoding.RegisterProvider(System.Text.CodePagesEncodingProvider.Instance);
    //open file and returns as Stream
        using (var stream = File.Open(filePath, FileMode.Open, FileAccess.Read))
        {
                using (var reader = ExcelReaderFactory.CreateReader(stream))
                {
                    var conf = new ExcelDataSetConfiguration
                    {
                        ConfigureDataTable = _ => new ExcelDataTableConfiguration
                        {
                            UseHeaderRow = true
                        }
                    };
                    var dataSet = reader.AsDataSet(conf);
                    // Now you can get data from each sheet by its index or its "name"
                    var dataTable = dataSet.Tables[0];
                    Console.WriteLine("Total no of rows  " + dataTable.Rows.Count);
                    Console.WriteLine("Total no of Columns  " + dataTable.Columns.Count);
                    return dataTable;
                }
        }
   
}