在c＃中读取一些列为空的Excel

我有这样的Excel模板

我有一些问题阅读（我不能使用第三方库）。 我的解决scheme

public partial class CaricaDocumento : System.Web.UI.Page { static string HDR; // "Yes" indicates that the first row contains column names, not data Regex regex = new Regex("([0-9]+)(.*)"); protected void Page_Load(object sender, EventArgs e) { string ind = "C:\\My_Template.xlsx"; string sheetName = "Page1"; DataTable dt = FromXLSX(ind, sheetName, true); DataToView(dt); } // Bind data to the page private void DataToView(DataTable dt) { LblFattura.Text = GetValue("AO10", dt); LblDataFattura.Text = GetValue("AX10", dt); LblCognomeOrRagioneSociale.Text = GetValue("B18", dt); LblNome.Text = GetValue("AB18", dt); } // return the value from the cell, indicate a code like "A1", "B3", "AO10"... public string GetValue(string codeCell, DataTable dt) { string[] substrings = regex.Split(codeCell); string letterString = substrings[0]; // 'A' or 'B' ... 'AZ' ... int letter = ColumnLetterToNumber(letterString); // transform the letter in a column index int num = 1; if (HDR == "Yes") num = 2; // if the first row is an header, do -2 // if the first row is a simple data row, do -1 int number = Int32.Parse(substrings[1]) - num; // the right row index return dt.Rows[number][letter].ToString(); } // transform the letter in a column index public static int ColumnLetterToNumber(string columnName) { if (string.IsNullOrEmpty(columnName)) throw new ArgumentNullException("columnName"); columnName = columnName.ToUpperInvariant(); int sum = 0; for (int i = 0; i < columnName.Length; i++) { sum *= 26; char letter = columnName[i]; sum += (letter - ('A' - 1)); } sum--; return sum; } // return the DataTable public static DataTable FromXLSX(string filePath, string sheet, bool hasHeaders) { try { // Create the new datatable. DataTable dtexcel = new DataTable(); // Define the SQL for querying the Excel spreadsheet. HDR = hasHeaders ? "Yes" : "No"; // "HDR=Yes;" indicates that the first row contains column names, not data string IMEX = "1"; string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + filePath + ";Extended Properties=\"Excel 12.0;HDR=" + HDR + ";IMEX=" + IMEX + ";\""; // Create connection: OleDbConnection conn = new OleDbConnection(strConn); conn.Open(); if (!sheet.EndsWith("_")) { // Query data from the sheet string query = "SELECT * FROM [" + sheet + "$]"; OleDbDataAdapter daexcel = new OleDbDataAdapter(query, conn); dtexcel.Locale = CultureInfo.CurrentCulture; // Fill the datatable: daexcel.Fill(dtexcel); } // Close connection. conn.Close(); // Set the datatable. return dtexcel; } catch { throw; } } } 

但是我注意到这个问题：如果数据不是从“A”列开始的， 那么DataTable会从数据的第一列读取数据 ！ 是索引的噩梦。 例如：

…在这种情况下，“A”列被忽略（DataTable从“B”开始取数据），这使得单元代码的使用无效（如“A1”，“B5”，“AO11”…） ColumnLetterToNumber(string columnName)方法失真。

有人知道我可以强加的DataTable从“A”列开始获取数据？ 或使用单元格代码从Excel中获取数据的其他方法？

Answer 1

你可以使用这个查询：

 string query = "SELECT NULL AS EmptyColumn, * FROM [" + sheet + "$]";