在线程启动c#之前显示图像

Question

我有一个程序，有能力生成很多的文本文件，我想把加载动画当程序正在执行生成文本文件的线程时，我的表单。这就是为什么我决定在google中下载一个.gif加载图像，并在程序执行命令之前显示它。但它并没有表现出来。你能帮我解决这个问题吗?它只是最小的，但我不能解决它。提前谢谢你

private void btn_Generate_Click(object sender, EventArgs e)
    {
        pic_Loading.Visible = true;
        if ((dt_To.Value - dt_From.Value).TotalDays >= 0)
        {
            for (var day = dt_From.Value; day <= dt_To.Value; day = day.AddDays(1))
            {
                string path = txt_path.Text + @"" + day.ToString("yyyy");
                BLL.CreateFolder.CreateNewFolder(path);
                if (chk_txtFile.Checked == true)
                {
                    BLL.InsertData.InsertDailySales(txt_Server.Text, cbo_Databasename.Text, txt_Uname.Text, txt_Password.Text, day.ToString("yyyy/MM/dd"), txt_texttenant.Text, txt_StoreKey.Text, "p_Aya_insert_daily");
                    BLL.InsertData.InsertDailySales(txt_Server.Text, cbo_Databasename.Text, txt_Uname.Text, txt_Password.Text, day.ToString("yyyy/MM/dd"), txt_texttenant.Text, txt_StoreKey.Text, "p_AYA_insert_hourly_First");
                    BLL.InsertData.InsertDailySales(txt_Server.Text, cbo_Databasename.Text, txt_Uname.Text, txt_Password.Text, day.ToString("yyyy/MM/dd"), txt_texttenant.Text, txt_StoreKey.Text, "p_AYA_insert_hourly_Sec");
                    BLL.PopulateData.LoadToDatagrid(txt_Server.Text, cbo_Databasename.Text, txt_Uname.Text, txt_Password.Text, "Select * from DAILY", dg_DailySales);
                    BLL.PopulateData.LoadToDatagrid(txt_Server.Text, cbo_Databasename.Text, txt_Uname.Text, txt_Password.Text, "Select * from HOURLY", dg_Hourly);
                    BLL.ExportData.ExportDaiySales(dg_DailySales, path + @"" + txt_textContract.Text + day.ToString("MMdd"));
                    BLL.ExportData.ExportHourlySales(dg_Hourly, path + @"" + txt_textContract.Text + day.ToString("MMdd"));
                }
                if (chk_DBF.Checked == true)
                {
                    BLL.InsertData.InsertDailySales(txt_Server.Text, cbo_Databasename.Text, txt_Uname.Text, txt_Password.Text, day.ToString("yyyy/MM/dd"), txt_DBFTenantName.Text, txt_StoreKey.Text, "p_AYA_insertintodailydbf");
                    BLL.PopulateData.LoadToDatagrid(txt_Server.Text, cbo_Databasename.Text, txt_Uname.Text, txt_Password.Text, "Select * from DailyDBF", dg_DBFDaily);
                    BLL.InsertData.InsertDailySales(txt_Server.Text, cbo_Databasename.Text, txt_Uname.Text, txt_Password.Text, day.ToString("yyyy/MM/dd"), txt_DBFTenantName.Text, txt_StoreKey.Text, "p_AYA_InsertHourly_DBF1");
                    BLL.InsertData.InsertDailySales(txt_Server.Text, cbo_Databasename.Text, txt_Uname.Text, txt_Password.Text, day.ToString("yyyy/MM/dd"), txt_DBFTenantName.Text, txt_StoreKey.Text, "p_AYA_InsertHourly_DBF2");
                    BLL.PopulateData.LoadToDatagrid(txt_Server.Text, cbo_Databasename.Text, txt_Uname.Text, txt_Password.Text, "Select * from HourlyDBF", dg_DBFHourly);
                    string Fields = "TRANDATE D, OLDGT N(15,2), NEWGT N(15,2), DLYSALE N(15,2), TOTDISC N(15,2), TOTREF N(15,2), TOTCAN N(15,2), VAT N(15,2), TENTNAME C(50), BEGINV I, " +
                                    " ENDINV N(11), BEGOR N(11), ENDOR N(11), TRANCNT N(11), LOCALTX N(15,2), SERVCHARGE N(15,2), NOTAXSALE N(15,2), RAWGROSS N(15,2), DLYLOCTAX N(15,2), OTHERS  N(11), TERMNUM C(50)";
                    BLL.CreateDBF.CreateDBFile(path, txt_DBFTenantCode.Text + day.ToString("MMdd"), Fields);
                    string Hourly = "TRANDATE D, HOUR C(50), SALES N(15,2), TRANCNT N(11), TENTNAME C(50), TERMNUM C(50)";
                    BLL.CreateDBF.CreateDBFile(path, txt_DBFTenantCode.Text + day.ToString("MMdd") + "H", Hourly);
                    BLL.InsertToDBF.InsertData(path, dg_DBFDaily, txt_DBFTenantCode.Text + day.ToString("MMdd"));
                    BLL.InsertToDBF.Hourly(path, dg_DBFHourly, txt_DBFTenantCode.Text + day.ToString("MMdd") + "H");
                }
            }
            MessageBox.Show("Success!");
            pic_Loading.Visible = false;
        }
        else
        {
            MessageBox.Show("Invalid Date");
        }
    }

Answer 1

我终于做到了。我使用了backgroundworker。谢谢大家的帮助