asp.net สอบถามเรื่องการ insert ลง sqlserver ไม่ได้+ภาษา ปัญหาบันทึกภาษาไทย ??? C#

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.OracleClient;
using System.Data.Odbc;


public partial class AddActivity : System.Web.UI.Page 
{
    string fileName1;
    string filePath1;
    protected void btnUpload_Click(object sender, EventArgs e)
    {
        //Label1.Text = DateTime.Today.ToString();
        SaveActivityMysql();
        if (SaveActivityMysql() == true)
        {
            Label1.Text = "Complete add pic";
        }
        else
            Label1.Text = "Error";


            //insert_activity

        //if ((FileUpload1.FileName != ""))
        //{
            
        //    string savePath1 = Server.MapPath("uploadImg/activity/");
        //    fileName1 = FileUpload1.FileName;
        //    filePath1 = savePath1 + fileName1;
        //    FileUpload1.SaveAs(filePath1);
        //    //conn.setgcAttract1 = fileName1;
        //}
            //InsertData conn = new InsertData();
            //OracleCommand comm = new OracleCommand();
            //string sql;
            //sql = "insert into nattapongs.activity(a_name,a_detail,a_create_date,a_username_create, a_pic_main)";
            //sql = sql + " values(:a_name,:a_detail,to_date(:a_create_date,'MM/dd/yyyy'),:a_username_create,:a_pic_main)";
            //comm.Parameters.Add(":a_name", OracleType.VarChar).Value = act_name.Text;
            //comm.Parameters.Add(":a_detail", OracleType.VarChar).Value = ASPxHtmlEditor1.Html.ToString(); 
            //comm.Parameters.Add(":a_create_date", OracleType.VarChar).Value = DateTime.Today.ToString("MM/dd/yyyy");
            //comm.Parameters.Add(":a_username_create", OracleType.VarChar).Value = Session["authen"].ToString();
            //comm.Parameters.Add(":a_pic_main", OracleType.VarChar).Value = fileName1;

            //if (conn.Savedata(comm, sql))
            //{
                //SaveActivityMysql();
                //Response.Redirect("ListActivity.aspx");
                //addsfile();
    //        }
    //        else
    //            Label1.Text = conn.gcErrmsg;
    //}

    //void addfile()
    //{
    //    try
    //    {
    //        // select max a_id
    //        loaddata Conn2 = new loaddata();
    //        DataView DvDate = new DataView();
    //        OracleCommand comm2 = new OracleCommand();
    //        DvDate = Conn2.GetData_SendParameter(comm2, "select * from nattapongs.activity ORDER BY a_id DESC");

    //        Label1.Text = DvDate.Table.Rows[0]["a_id"].ToString();

    //        // Get the HttpFileCollection
    //        HttpFileCollection hfc = Request.Files;
    //        for (int i = 0; i < hfc.Count; i++)
    //        {
    //            HttpPostedFile hpf = hfc[i];
    //            if (hpf.ContentLength > 0)
    //            {
    //                hpf.SaveAs(Server.MapPath("pic_activity") + "\\" +
    //                  System.IO.Path.GetFileName(hpf.FileName));


    //                //insert_pic_activity
    //                InsertData conn3 = new InsertData();
    //                OracleCommand comm3 = new OracleCommand();
    //                string sql_pic_activity;
    //                sql_pic_activity = "insert into nattapongs.activity_pic(ap_pic,ap_a_id)";
    //                sql_pic_activity = sql_pic_activity + " values(:ap_pic,:ap_a_id)";
    //                comm3.Parameters.Add(":ap_pic", OracleType.VarChar).Value = System.IO.Path.GetFileName(hpf.FileName);
    //                comm3.Parameters.Add(":ap_a_id", OracleType.VarChar).Value = DvDate.Table.Rows[0]["a_id"].ToString();

    //                if (conn3.Savedata(comm3, sql_pic_activity))
    //                {
                        
    //                    Label1.Text = "Complete add pic";
    //                }
    //                else
    //                    Label1.Text = conn3.gcErrmsg;

    //           }
    //        }
    //    }
    //    catch (Exception ex)
    //    {

    //    }

    }

    Boolean SaveActivityMysql()
    {
        try
        {

            string ConnStr = "Driver={MySQL ODBC 3.51 Driver};Server=10.20.20.10;Database=research;uid=research;pwd=irda";
            OdbcConnection con = new OdbcConnection(ConnStr);

            string xx;
            xx = "insert into activity22(topic, detail, dateAct, pic_main, status) values('" + act_name.Text + "','" + ASPxHtmlEditor1.Html.ToString() + "', NOW(),'" + fileName1 + "','N')";
            OdbcCommand cmd = new OdbcCommand();
            cmd.CommandText = xx;
            cmd.Connection = con;

            //cmd.Parameters.Add(":gcFullDetail", OdbcType.Text).Value = gcFullDetail;
            //cmd.Parameters.Add(new OdbcParameter("@v", gcFullDetail));
            //cmd.ExecuteNonQuery();
            //(xx, con);
            //Label1.Text = xx;
            con.Open();
            cmd.ExecuteNonQuery();
            //con.Close();
            return true;
        }
        catch (Exception e)
        {
            return false;
        }
    }

}