Closing Excel file after reading

问题

Here is my code for opening the Excel file and reading the data, everything is working fine but what I would like is to close once the Excel file is read, how would i do that? I try Dispose the object but did not help.

public static DataTable ExcelWorkbook(string workbookName)
        {
            string connectionString = String.Format(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties=""Excel 8.0;HDR=YES;IMEX=1;""", FILENAME);
            string query = String.Format("select * from [{0}$]", workbookName);

            OleDbDataAdapter dataAdapter = new OleDbDataAdapter(query, connectionString);
            DataSet dataSet = new DataSet();
            dataAdapter.Fill(dataSet);

            dataAdapter.Dispose();

            DataTable myTable = dataSet.Tables[0];
            if (myTable != null)
                return myTable;

            return null;
        }

回答1:

Your code should look sth like that:

OleDbConnection connection;
OleDbDataAdapter clientsAdapter new OleDbDataAdapter();
DataSet myDataSet = new DataSet();

connectionString = (@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0}.xlsx;Extended Properties=""Excel 12.0 Xml;HDR=YES""",FILENAME);
connection = new OleDbConnection(connectionString);
connection.Open();

clientsAdapter.SelectCommand = new OleDbCommand("SELECT * FROM [{0}$]", connection);

DataTable data = new DataTable("MyTable");
clientsAdapter.Fill(data);
myDataSet.Tables.Add(data);

connection.Close();

After the connection is closed, the excel file will be unlocked.

回答2:

You are disposing the data adapter that read the data, not the reference to the Excel file itself.

Somewhere in your code, you will have opened the workbook. You need to call

workbook.Close();

http://msdn.microsoft.com/en-us/library/microsoft.office.interop.excel.workbookclass.close(v=office.14).aspx

来源：https://stackoverflow.com/questions/12591622/closing-excel-file-after-reading

标签

excel-2007