Question

我一直试图在我的注射交易中添加进度条但没有成功。我需要显示在我的表上插入数据时的百分比。我有多个表和多个插入。我还在多个表上有一个循环插入，如使用listview数据在foreach语句中所示。当我尝试从列表视图中插入100条记录时，我的计算机开始滞后，并且无法确定何时完成。

任何人都可以告诉我如何操作以及如何将backgroundworker链接到进度条。

我还需要检查saveEdit（）的进度 - 多个表上有多个更新的函数和多个表上有多个删除的saveDelete（）函数

如果我将saveAdd（）代码放在backgroundWorkerDoWork函数中，我认为这将是一种过度杀伤，因为我还需要放置具有多行代码的saveEdit（）和saveDelete（）函数。

顺便说一句，我使用的是fbconnection，它与sqlconnection功能几乎相同。

private void saveAdd()
    {
        backgroundWorker.RunWorkerAsync(); // loading bar 

        DBconnection dbConString = new DBconnection(); //initialize connectDB with connection string
        FbConnection dbConnect = new FbConnection(dbConString.getConnectionString()); // connect to database using connectdb
        dbConnect.Open(); // open the connection
        FbTransaction transaction = dbConnect.BeginTransaction(); // instantiate transaction

        backgroundWorker.ReportProgress(10);// loading bar not working

        try
        {
            FbCommand myCommand1 = new FbCommand(getQuerryStrings("insEquipMstDtl"), dbConnect, transaction); //stantiate sql command
            myCommand1.Parameters.Add("equipmentid", SqlDbType.BigInt).Direction = ParameterDirection.Output;
            myCommand1.ExecuteScalar();// insert into tbl_equipmst or equipmaster
            string strDtlequipmentid = myCommand1.Parameters["equipmentid"].Value.ToString();
            //MessageBox.Show(strDtlequipmentid);

            backgroundWorker.ReportProgress(15);// loading bar not working

            FbCommand myCommand2 = new FbCommand(getQuerryStrings("insEquipTransaction", strDtlequipmentid), dbConnect, transaction); //stantiate sql command
            myCommand2.Parameters.Add("EQUIPTRANSID", SqlDbType.BigInt).Direction = ParameterDirection.Output;
            myCommand2.ExecuteScalar(); // inserts transaction details
            string strDtlequiptransid = myCommand2.Parameters["EQUIPTRANSID"].Value.ToString();

            backgroundWorker.ReportProgress(20);// loading bar  not working

            FbCommand myCommand3 = new FbCommand(getQuerryStrings("insEquipWarServDtl", strDtlequipmentid, strDtlequiptransid), dbConnect, transaction); //stantiate sql command
            myCommand3.ExecuteNonQuery(); // inserts service warranty in details

            backgroundWorker.ReportProgress(25);// loading bar not working

            FbCommand myCommand4 = new FbCommand(getQuerryStrings("insEquipWarProdDtl", strDtlequipmentid, strDtlequiptransid), dbConnect, transaction); //stantiate sql command
            myCommand4.ExecuteNonQuery(); // inserts product warranty in details

            backgroundWorker.ReportProgress(30);// loading bar  not working

            FbCommand myCommand5 = new FbCommand(getQuerryStrings("insEquipStatDtl", strDtlequipmentid, strDtlequiptransid), dbConnect, transaction); //stantiate sql command
            myCommand5.ExecuteNonQuery(); // inserts equipmtn status

            backgroundWorker.ReportProgress(35);// loading bar  not working

            FbCommand myCommand6 = new FbCommand(getQuerryStrings("insEquipLocationDtl", strDtlequipmentid, strDtlequiptransid), dbConnect, transaction); //stantiate sql command
            myCommand6.ExecuteNonQuery(); // inserts location

            backgroundWorker.ReportProgress(40);// loading bar  not working


            if (chkParts.Checked == true)
            {
                if (lvwPartsList.Items.Count !=0 )
                {


                    foreach (ListViewItem item in lvwPartsList.Items)
                    {
                        FbCommand myCommand7 = new FbCommand(getPartsQuerryStrings("insEquipMstPart", strDtlequipmentid, item), dbConnect, transaction); //stantiate sql command
                        myCommand7.Parameters.Add("equipmentid", SqlDbType.BigInt).Direction = ParameterDirection.Output;
                        myCommand7.ExecuteScalar();// parts insert into tbl_equipmst or equipmaster 
                        string strPartsequipmentid = myCommand7.Parameters["equipmentid"].Value.ToString();

                        FbCommand myCommand8 = new FbCommand(getPartsQuerryStrings("insEquipTransactionPart", strPartsequipmentid), dbConnect, transaction); //stantiate sql command
                        myCommand8.Parameters.Add("EQUIPTRANSID", SqlDbType.BigInt).Direction = ParameterDirection.Output;
                        myCommand8.ExecuteScalar(); // inserts transaction details - parts
                        string strPartequiptransid = myCommand8.Parameters["EQUIPTRANSID"].Value.ToString();

                        FbCommand myCommand9 = new FbCommand(getPartsQuerryStrings("insEquipWarServPart", strPartsequipmentid, strPartequiptransid,item), dbConnect, transaction); //stantiate sql command
                        myCommand9.ExecuteNonQuery(); // inserts service warranty in details - parts

                        FbCommand myCommand10 = new FbCommand(getPartsQuerryStrings("insEquipWarProdPart", strPartsequipmentid, strPartequiptransid, item), dbConnect, transaction); //stantiate sql command
                        myCommand10.ExecuteNonQuery(); // inserts product warranty in details - parts

                        FbCommand myCommand11 = new FbCommand(getPartsQuerryStrings("insEquipStatPart", strPartsequipmentid, strPartequiptransid, item), dbConnect, transaction); //stantiate sql command
                        myCommand11.ExecuteNonQuery(); // inserts equipmtn status - parts

                        FbCommand myCommand12 = new FbCommand(getPartsQuerryStrings("insEquipLocationPart", strPartsequipmentid, strPartequiptransid, item), dbConnect, transaction); //stantiate sql command
                        myCommand12.ExecuteNonQuery(); // inserts equipmtn location - parts

                    }          
                }

            }
            transaction.Commit();

            MessageBox.Show("Successful");
            frmNormalMode();

        }
        catch (Exception x)
        {
            transaction.Rollback();
            MessageBox.Show("No Update has been made. Error (" +
                x.Message + ")");
        }
        finally
        {
            dbConnect.Close();
        }
    }

Answer 1

您以错误的方式使用BackgroundWorker。首先，对代码进行以下更改。在创建BackgroundWorker时，将backgroundWorker.WorkerReportsProgress设置为True（或者如果使用控件，请在“属性”窗口中将其设置为true）。接下来，实现DoWork事件。它应该包含您的保存代码。同样，您可以在“属性”窗口中使用事件DoWork。现在看起来应该是这样的（注意我使用了Toolbox窗口中的控件，所以我将backgroundworker作为我表单上的控件）：

private bool arePartsChecked;

private List<string> partsList = new List<string>();

private void saveAdd()
{
    arePartsChecked = chkParts.Checked; 
    partsList.Clear();
    foreach (ListViewItem item in lvwPartsList.Items)
      partsList.Add(item.Text);
    backgroundWorker.RunWorkerAsync(); // loading bar
    // remove saving code, move it to DoWork event
}

private void backgroundWorkerDoWork(object sender, DoWorkEventArgs e)
{
    DBconnection dbConString = new DBconnection();
    FbConnection dbConnect = new FbConnection(dbConString.getConnectionString()); 
    // part of your code ......
    if ((arePartsChecked) && (partsList.Count > 0))
    {
        foreach (itemList partsList)
        {
            FbCommand myCommand7 = new FbCommand(getPartsQuerryStrings("insEquipMstPart",
              strDtlequipmentid, item), dbConnect, transaction); //stantiate sql command AND note: item is now a string...!!
            // etc.
        }
        // ...
    } 
    finally
    {
        dbConnect.Close();
    }
}

现在实现private void ProgressChanged事件。它应该包含如下代码：

private void backgroundWorkerProgressChanged(object sender, ProgressChangedEventArgs e)
{
    progressBar.Value = e.ProgressPercentage;
}

其中progressBar是表单上的进度条。

如何在多个sql注入上添加进度条

1 个答案: