显示数据库插入的进度条

我有一个应用程序，其中用户上传一个包含数百行的Excel文件，当他点击上传时，该文件被转换为DataTable并发送到数据库，由存储过程插入。上传花费了太多时间，我想显示已插入的行数的进度。有什么办法吗?

List<DataTable> tb = Helper.SplitTableToManyTables(FileTb, 50); // this is a function that split the Main dataTable to several Dt each have 50 rows
        int importedRowsCount = 0;
        for (int KLoop = 0; KLoop < tb.Count; KLoop++)
        {
            string[] ContctInfoCols = { "First Name", "Last Name", "Nickname", "Job Title", "Birthday", "Gender", "E-mail Address", "E-mail Address 2", "E-mail Address 3", "Web Page", "Mobile", "Mobile 2", "Mobile 3", "Home Phone", "Home Phone 2", "Business Phone", "Business Phone 2", "Other Phone", "Business Fax", "Home Fax", "Home Street", "Business Street", "Notes", "Company" };//the order of fields is very important
            string contact = "";
            DataTable resTb = new DataTable("ContactsTb");
            resTb.Columns.Add("ContactInfo");
            for (int iLoop = 0; iLoop < tb[KLoop].Rows.Count; iLoop++)
            {
                contact = ";";
                DataRow dr = resTb.NewRow();
                for (int jLoop = 0; jLoop < ContctInfoCols.Length; jLoop++)
                {
                    if (ContctInfoCols[jLoop] != "" && tb[KLoop].Rows[iLoop][ContctInfoCols[jLoop]].ToString() != "")
                        contact += (jLoop + 1).ToString() + "~" + tb[KLoop].Rows[iLoop][ContctInfoCols[jLoop]].ToString().Replace("/", "") + ";";
                }
                dr["ContactInfo"] = contact;
                resTb.Rows.Add(dr);
            }
            if (QueriesDataHelper.ImportContacts(resTb, int.Parse(TxtHiddenGroupId.Value), Session)) // here is the stored procedure call 
            {
                importedRowsCount += resTb.Rows.Count;
                var script = "DisplayProgressMsg(" + importedRowsCount + ")";
                ScriptManager.RegisterStartupScript(this, GetType(), "MyScript", script, true); // here i am trying to display the currently inserted rows but it's not working
                if (KLoop == tb.Count - 1)
                    MessageBox.Show(importedRowsCount.ToString()+" Contacts imported successfully");
            }
            //else
            // MessageBox.Show("Sorry,an error occured during contacts upload.");
        } 
     function DisplayProgressMsg(msg) {
        alert(msg);
     }