在C＃中使用OleDb读取Excel数据时出错（此表包含超出此电子表格中定义的单元格范围的单元格）

Question

我是初学者，学习C＃。我正在尝试从excel文件中读取数据，但我不知道为什么我一直收到错误：

'此表包含超出此电子表格“

中定义的单元格范围的单元格

我之前尝试过相同的方法，并没有收到任何错误，但这是针对预先存在的excel文件。但在这种情况下，我首先创建excel文件，然后只读取它。事情就是当我从列行“A12”开始读取它时。

我想从A12开始读取列行的主要原因是确定是否有空单元格，以后可用于输入数据;每次需要将新数据添加到excel文件时，都要重复此过程。我希望您能理解我正在尝试做的事情。

这是代码：

// Initializing C# - Excel Export Method:                     

Microsoft.Office.Interop.Excel.Application m_excelLoanReceiptWrite = new Microsoft.Office.Interop.Excel.Application();
m_excelLoanReceiptWrite.Application.Workbooks.Add(Type.Missing);

// Writing Data to Excel
m_excelLoanReceiptWrite.Cells[1, 1] = "Loan Receipt";
m_excelLoanReceiptWrite.Cells[3, 1] = "Name";
m_excelLoanReceiptWrite.Cells[5, 1] = "ESM ID No.";
m_excelLoanReceiptWrite.Cells[7, 1] = "Mobile No.";
m_excelLoanReceiptWrite.Cells[3, 4] = "Loan Date & Time:";
m_excelLoanReceiptWrite.Cells[5, 4] = "Return Date & Time:";
m_excelLoanReceiptWrite.Cells[7, 4] = "Venue:";
m_excelLoanReceiptWrite.Cells[11, 1] = "Recipient's Loan Item List";
m_excelLoanReceiptWrite.Cells[12, 1] = "No.";
m_excelLoanReceiptWrite.Cells[12, 2] = "Item Name";
m_excelLoanReceiptWrite.Cells[12, 3] = "Item Barcode";


//Opening and Saving into Excel File:
m_excelLoanReceiptWrite.ActiveWorkbook.SaveCopyAs(m_excelLoanReceiptFileFullPath);  //Specifying Excel File Name and Location via textBoxExcelLoanItemTrackerLocation.Text
m_excelLoanReceiptWrite.ActiveWorkbook.Saved = true;     //check tomake sure excel file has been saved

//Close Excel File after Write and Save process:
m_excelLoanReceiptWrite.Quit();


/*************************** xlswrite sequences to Excel Receipt file for each Loan <ESMID>.xls <End>**********************/



/*************************** Data Extraction from post-written Loan Receipt Excel File <Begin>*****************************/

//Creating a connection directory to access the Excel "LoanItemTracker" file
string m_pathSourceExcelLoanReceipt = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + m_excelLoanReceiptFileFullPath + @";Extended Properties=""Excel 8.0; HDR=Yes;IMEX=1;ImportMixedTypes=Text;TypeGuessRows=0""";
OleDbConnection m_pathConnectionExcelLoanReceipt = new OleDbConnection(m_pathSourceExcelLoanItemTracker);

/**********************Excel File "LoanReceipt" Numbering Column data Extraction <Begin> *************************/


string m_commandLoanReceiptNumColumn = "SELECT * FROM [A12:A]";   // SELECT * FROM [A12:A] means selecting the entire 'A' column starting from coordinate A12 

DataSet m_loanReceiptNumColumn = new DataSet();

//  Extracting all the Number Column information from the Excel file "LoanReceipt" using the connection directory and the preset excel command for row selection
OleDbDataAdapter m_loanReceiptNumColumnAdapter = new OleDbDataAdapter(m_commandLoanReceiptNumColumn, m_pathConnectionExcelLoanReceipt);
m_loanReceiptNumColumnAdapter.Fill(m_loanReceiptNumColumn);

DataTable m_loanReceiptNumColumnMatrix;     //    Declare a Table Matrix to save the excel data contained in the variable m_loanReceiptNumColumnMatrix

int m_loanReceiptNumColumnRowCount;         //    Integer variable to count the rows of the matrix variable m_loanReceiptNumColumnMatrix

m_loanReceiptNumColumnMatrix = m_loanReceiptNumColumn.Tables[0];        //  Saving data in m_loanReceiptNumColumn into the Data Table variable m_loanReceiptNumColumnMatrix

m_loanReceiptNumColumnRowCount = m_loanReceiptNumColumnMatrix.Rows.Count;       //  identifying the number of rows in the matrix variable m_loanReceiptNumColumnMatrix


/**********************Excel File "LoanReceipt" Numbering Column data Extraction <End> *************************/

Answer 1

将OleDbConnection与工作簿一起使用时，您需要在evverey标题行和每个标题列（如数据库）中包含数据。

试试这个

  

如果你有空单元格，首先填写那些将要标记的数据   空单元格。