Question

我有以下几行代码：

     protected void btnUpload_Click(object sender, EventArgs e)
{

        MySqlTransaction transaction;

        string ex_id = "";



        string file_name = Path.GetFileName(FileUpload1.FileName);
        string Excel_path = Server.MapPath("~/Excel/" + file_name);
    DataTable dtExceldata = new DataTable();//just added
    FileUpload1.SaveAs(Excel_path);

        OleDbConnection my_con = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Excel_path + ";Extended Properties=Excel 8.0;Persist Security Info=False");
    my_con.Open();
    OleDbDataAdapter da = new OleDbDataAdapter("select * from [Sheet1$]", my_con);
        da.Fill(dtExceldata);
    if (dtExceldata.Rows.Count > 0)             
    {
        //foreach (DataRow row in dtExceldata.Rows)
            for (int i = 0; i <= dtExceldata.Rows.Count - 1; i++)

        {

                string ex_dir = dtExceldata.Rows[i]["website_a"].ToString();
                //string ex_dir = row["website_a"].ToString();


                string ex_email = dtExceldata.Rows[i]["email_id"].ToString();
                // string ex_email = row["email_id"].ToString();


                string ex_email1 = dtExceldata.Rows[i]["email_id2"].ToString();
                //string ex_email1 = row["email_id2"].ToString();


                string ex_email2 = dtExceldata.Rows[i]["email_id3"].ToString();
                //string ex_email2 = row["email_id3"].ToString();


                string ex_company = dtExceldata.Rows[i]["company"].ToString();
                //string ex_company = row["company"].ToString();

                string ex_contact = dtExceldata.Rows[i]["contact_name"].ToString();
                //string ex_contact = row["contact_name"].ToString();


                string ex_proposal = dtExceldata.Rows[i]["proposal_status"].ToString();
                // string ex_proposal = row["proposal_status"].ToString();


                string ex_reason = dtExceldata.Rows[i]["reason"].ToString();
                //string ex_reason = row["reason"].ToString();


        int chk = 0;
            int type = 0;
            int dup = 0;
            int dir = 0;

            if (ddlwebsites.SelectedIndex != 0)
            {
                dir = Convert.ToInt32(ddlwebsites.SelectedValue);
                if (dir == 8)
                {
                    type = 1;
                }

            }


            foreach (ListItem lstAssign in ddlevents.Items)
            {
                if (lstAssign.Selected == true)
                {
                    chk = 1;
                }
            }

            if (type == 1 && chk == 0)
            {
                evyerror.Text = "Please Select the Event!!";
                return;

            }

            else
            {
                string querycomp = "", compID = "";
                querycomp = "Select * from barter_company where website like '%' '" + ex_dir + "' '%'";
                string connStr = ConfigurationManager.ConnectionStrings["BarterConnectionString"].ToString();
                connect = new MySqlConnection(connStr);
                connect.Open();
                transaction = connect.BeginTransaction();
                try
                {
                    ClassDtBaseConnect clsDtResult = new ClassDtBaseConnect();
                    DataTable dt = clsDtResult.GetDataTable(querycomp);
                    if (dt.Rows.Count > 0)
                    {
                        compID = dt.Rows[0]["comp_id"].ToString();
                        ViewState["comp_id"] = compID;
                        if (type == 1)
                        {
                            dup = checkforDuplicates(Convert.ToInt32(compID));
                            if (dup == 1)
                            {
                                //Confirm_MP.Show();
                                // ScriptManager.RegisterStartupScript(this, this.GetType(), "script", "confirmation();", true);
                            }

                        }
                        //return;
                    }
                    else
                    {

                        string queryStr = "insert into barter_company (comp_name,website) values(?comp,?website)";
                        MySqlCommand cmd = new MySqlCommand(queryStr, connect, transaction);
                        cmd.Parameters.AddWithValue("?comp", ex_company);
                        cmd.Parameters.AddWithValue("?website", ex_dir);
                        cmd.ExecuteNonQuery();
                        cmd.CommandText = "Select LAST_INSERT_ID()";
                        compID = cmd.ExecuteScalar().ToString();
                        transaction.Commit();
                        connect.Close();

                    }
                }
                catch
                {
                    transaction.Rollback();
                }





                if (dup == 0)
                {
                    // create a connection string with your sql database 
                    string connStr1 = ConfigurationManager.ConnectionStrings["BarterConnectionString"].ToString();
                    connect = new MySqlConnection(connStr1);
                    connect.Open();
                    DateTime date = new DateTime();
                    date = DateTime.ParseExact(txtsentdate.Text, "MM/dd/yyyy", null);
                    string SentDateString = date.ToString("yyyy/MM/dd");
                    //DateTime date = new DateTime();
                    //if (!string.IsNullOrEmpty(ex_date))
                    // {
                    //DateTime date = new DateTime();//added by chetan
                    //ex_date = ex_date.Split(' ')[0];//added by chetan
                    //date = DateTime.ParseExact(ex_date, "MM/dd/yyyy", null);//added by chetan
                    //string SentDateString = date.ToString("yyyy/MM/dd");//added by chetan
                    //DateTime SentDate = Convert.ToDateTime(SentDateString).Date;//added by chetan
                    //// DateTime date = DateTime.Parse(ex_date);//added by chetan


                    // }
                    //date = DateTime.ParseExact(ex_date, "MM/dd/yyyy", System.Globalization.CultureInfo.InvariantCulture);//added by chetan
                    //date = DateTime.ParseExact(ex_date, "MM/dd/yyyy", null);
                    // string SentDateString = date.ToString("yyyy/MM/dd");
                    transaction = connect.BeginTransaction();
                    try
                    {

                        string ex_uid = Session["session_barterUser_id"].ToString();


                        MySqlCommand cmd = new MySqlCommand("insert into barter_proposals(user_id, sent_date, website_a, email_id, email_id2, email_id3, company, contact_name, proposal_status, reason,type) values(?uid,?sentdate,?dir,?email,?email2,?email3,?comp,?cont_name,?pro_status,?reason,?type)", connect);

                        cmd.Parameters.AddWithValue("?uid", ex_uid);
                        cmd.Parameters.AddWithValue("?comp", compID);

                        cmd.Parameters.AddWithValue("?sentdate", SentDateString);
                        // command.Parameters.AddWithValue("?event", eventname);
                        cmd.Parameters.AddWithValue("?dir", dir);
                        // command.Parameters.AddWithValue("?bar_type", ddlbartertype.SelectedValue);
                        // command.Parameters.AddWithValue("?website_b", txtwebsite.Text);
                        //cmd.Parameters.AddWithValue("?comp", ex_company);
                        cmd.Parameters.AddWithValue("?cont_name", ex_contact);
                        cmd.Parameters.AddWithValue("?email", ex_email);
                        cmd.Parameters.AddWithValue("?email2", ex_email1);
                        cmd.Parameters.AddWithValue("?email3", ex_email2);
                        cmd.Parameters.AddWithValue("?pro_status", ex_proposal);
                        cmd.Parameters.AddWithValue("?reason", ex_reason);
                        cmd.Parameters.AddWithValue("?type", type);
                        // command.Parameters.AddWithValue("?type", type);

                        cmd.ExecuteNonQuery();
                        if (type == 1)
                        {

                            cmd.CommandText = "Select LAST_INSERT_ID()";
                            Int64 CurrentProId = Convert.ToInt64(cmd.ExecuteScalar());
                            int eventAssignID;
                            string QueryInqEventAssign = "insert into barter_propeventassign(prop_id,event_id) values(?pro_id,?event_id)";

                            foreach (ListItem lstAssign in ddlevents.Items)
                            {
                                if (lstAssign.Selected == true)
                                {
                                    cmd = new MySqlCommand(QueryInqEventAssign, connect, transaction);
                                    cmd.Parameters.AddWithValue("?pro_id", CurrentProId);
                                    eventAssignID = Convert.ToInt32(lstAssign.Value);
                                    cmd.Parameters.AddWithValue("?event_id", eventAssignID);
                                    cmd.ExecuteNonQuery();

                                }
                            }

                        }//end of if
                        transaction.Commit();
                        connect.Close();
                        Response.Write("<script type=\"text/javascript\">alert('Proposal Added Successfully!!!');</script>");
                    }//end of try
                    catch (Exception ex)
                    {
                        transaction.Rollback();
                        Response.Write("<script>alert('There is an Error Ocurred:" + Server.HtmlEncode(ex.Message) + "')</script>");
                    }
                    finally
                    {
                        connect.Close();

                    }

                }//ifdupzero
            }//else
        }//for//foreach
      }//while //if  


   // dr.Close();//commented by chetan

    my_con.Close();
    if (System.IO.File.Exists(Excel_path))
    {
        System.IO.File.Delete(Excel_path);
    }





}

假设excelsheet文件中有2个条目。当尝试导入时，它会将这2行条目插入到数据库表中。但问题是，读者不会停止执行。阅读2行后，它正在读取第三行，它是空白的。我使用了dr.close，它继续读取空白的行条目。

Answer 1

不是检查是否有行（dr.Read（））作为循环条件，而是检查行的第一个单元格是否为空（dr [0] .ToString（）！= String.Empty）

string file_name = Path.GetFileName(FileUpload1.FileName);
            string Excel_path = Server.MapPath("~/Excel/" + file_name);
            FileUpload1.SaveAs(Excel_path);

            OleDbConnection my_con = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Excel_path + ";Extended Properties=Excel 8.0;Persist Security Info=False");

            my_con.Open();         
            OleDbCommand command = new OleDbCommand("select * from [Sheet1$]", my_con);          
            OleDbDataReader dr = command.ExecuteReader();
            dr.Read();            
            while (dr[0].ToString() != String.Empty)
            {
            ex_id = dr[0].ToString();
            string ex_uid = dr[1].ToString();
            //get second row data and assign it ex_name variable
            string ex_date = dr[2].ToString();
            //get thirdt row data and assign it ex_name variable

            string ex_dir = dr[3].ToString();

            //get first row data and assign it ex_location variable
            string ex_email = dr[4].ToString();
            string ex_email1 = dr[5].ToString();
            string ex_email2 = dr[6].ToString();
            //string ex_company = dr[7].ToString();
            string ex_company = dr[7].ToString();
            string ex_contact = dr[8].ToString();
            string ex_proposal = dr[9].ToString();
            string ex_reason = dr[10].ToString();
               ...............
               //Insert operation
               ...............
            dr.Read();
            }
            dr.close();
            my_con.close();

当然，前提是，如果行的其余部分不为空，则始终填充第一列。如果不是这种情况，您还可以检查循环条件中的其他列。

Answer 2

有各种方法可以做到这一点你可以将excel数据加载到datatable，然后你就可以循环使用像这样的特定列名的每一行

string file_name = Path.GetFileName(FileUpload1.FileName);
    string Excel_path = Server.MapPath("~/Excel/" + file_name);
    DataTable dtExceldata = new DataTable();
    FileUpload1.SaveAs(Excel_path);
    OleDbConnection my_con = new OleDbConnection(@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + Excel_path + ";Extended 

Properties=Excel 8.0;Persist Security Info=False");
        OleDbDataAdapter da = new OleDbDataAdapter("select * from [Sheet1$]", my_con);
        da.Fill(dtExceldata);
        if(dtExceldata.Rows.Count>0)
        {
            for (int i = 0; i <= dtExceldata.Rows.Count - 1; i++)
            {
                //assign value to variable
                //like below
                //string ex_uid = dtExceldata.Rows[i]["columnName"]; 
                //then insert operation here

            }
    }

Answer 3

查看此excel文件

和c＃中的数据表

这个循环将只重复数据表中的行数然后我实际上尝试了这个它只循环行数（例如两次）但我发现了一个错误，如果你将输入两行然后五行空行然后一些数据会在数据表中给你空白值检查你的excel文件可能会有一些空白值，如参加人员所示然后你也可以通过检查行中的空值来跳过空白值

//level 2
$(document).ready(function() {
  var max_fields_2 = 2;
  var x = 1;

  $(document).on('click', '.add_2', function(e) {
    e.preventDefault();
    var wrapper_2 = $(".input_2");
    if (x < max_fields_2) {
      x++;
      $(wrapper_2).append('<section>-.-.-<br/><input type="datetime-local"><a href="#" class="remove_2">Remove</a><br /> <button class="add_3">return 2</button> </section>');
      $(wrapper_2).on("click", ".remove_2", function(e) {
        e.preventDefault();
        $(this).parent('section').remove();
        x--;
      })
    }
  });
});

将excelsheet文件中的数据导入mysql数据库C＃

3 个答案: