如何从另一个类关闭OleDbConnection

Question

我有一个Excel文件正在连接并用于从中读取数据以完成一个过程

以下是代码：

    public void eConnection(string srcString, string id)
    {
        tmpArry = new ArrayList();
        GlobalTestFlow = new Dictionary<string, string>();
        StepData = new Dictionary<string, string>();
        innerData = new Dictionary<string, string>();
        setTestID(id);

        conString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source="+srcString+"; Extended Properties='Excel 8.0;HDR=Yes;IMEX=1;'";
        connection = new OleDbConnection(conString);
        connection.Open();

    }

我使用它创建第一个连接，然后使用引用原始连接的另一个项目中的代码读取Excel文件：

    public static string testID;
    public eDriver driver;
    private string conSrc = "'C:Desktop\\Test Data\\OLBBAppTestData.xlsx'";
    private string workSheet = "Global";


    public void OLBBFrinLnLoanTest()
    {
        testID = "1"; // Dynamic per test case generated

        driver = new eDriver();
        driver.eConnection(conSrc, testID); //Connection is made to Excel here 
        driver.getTestFlow(workSheet); //Grab the worksheet to read data from 

        foreach (string tmp in driver.GlobalTestFlow.Keys)
        {
            switch (driver.GlobalTestFlow[tmp].ToString())
            {

                case "OpenActivateLoan": //Find data that matches "OpenActivateLoan"
                    cOLBBOpenActivateLoan exeOpenActivateLoan = new cOLBBOpenActivateLoan();
                    exeOpenActivateLoan.StandAlone(driver, driver.GlobalTestFlow[tmp].ToString()); //Execute this once data matches 
                    break;
                default:
                    break;
            }
        }

调用exeOpenActivateLoan后，将调用另一个类来继续该过程：

    namespace OLBBv2.Components
    {
        class cOLBBOpenActivateLoan
        {
            private mOLBBOpenActivateLoan loanModule;

            internal void StandAlone(eDriver e, string worksheet)
            {
                e.getStepData(worksheet); //find step Data to continue workflow 
                loanModule = new mOLBBOpenActivateLoan();

                foreach (string tmp in e.StepData.Keys)
                {
                    switch (tmp)
                    {
                        case "i_ClickActionButton":
 //calling this function to insert back into Excel file, This is where I would like to close the original connection
                            loanModule._ClickSubmitButton();
                            break;

                        default:
                            break;
                    }
                }
                e.ResetStepData();
            }
        }
    }

我想在调用函数之前关闭连接，因为被调用的函数将更新Excel文件

以下是为更新Excel文件而调用的代码：

public void _InsertLoanActNumSegmentToExcel()
{
    eWriter writer = new eWriter();
            string loanAct = "applesauce";
            writer.insertToDataSheet(loanAct);
}

在eWrirter类中，我建立了一个与Excel文件的新连接以写入它：

      public void insertToDataSheet(string loanAct)
            {
                try
                {
                    string srcExcel = "C:\\Test Data\\OLBBAppTestData.xlsx";

                    System.Data.OleDb.OleDbConnection MyConnection;
                    System.Data.OleDb.OleDbCommand myCommand = new System.Data.OleDb.OleDbCommand();
                    string sql = null;
                    MyConnection = new OleDbConnection("Provider = Microsoft.ACE.OLEDB.12.0; Data Source = " + srcExcel + "; Extended Properties = 'Excel 8.0;HDR=Yes;'");
                    MyConnection.Open();

                    myCommand.Connection = MyConnection;

                    sql = "UPDATE [Global$] SET o_AccountNumber ='"+loanAct+"' WHERE TestID='"+getTestID()+"'";

                    myCommand.CommandText = sql;

//Exception gets thrown here with error message "Operation must use an updateable query"
                    myCommand.ExecuteNonQuery(); 
                    MessageBox.Show("Insert Success!");
                    MyConnection.Close();

                }
                catch (Exception eInnerData)
                {
                    MessageBox.Show("Method: getInnerData " + eInnerData.ToString());
                }
            }

尝试执行查询后，我收到错误，因为从我读数据时仍然打开连接，我想关闭连接，然后重新打开它以插回Excel文件

我要做的是从Excel文件中读取，然后在新连接上更新Excel文件