update unique values into SQL Table?

private void btnSave_Click(object sender, EventArgs e)
        {

            string str = string.Empty;
            DataSet ds1 = new DataSet();
            DataView dv;
            string clientdata="";

            foreach (var clientItem  in checkedListBoxClientTableField.CheckedItems)
            {
                if (checkedListBoxClientTableField.SelectedIndex > -1)
                {
                    foreach(DataRowView dataFromClient in checkedListBoxClientTableField.CheckedItems)
                    {
                        clientdata=dataFromClient[0].ToString();
                    }

                    MySqlConnection myconn3;
                    string SelectClientData = "Data Source="+lblSaveSeverIpClient.Text +";Initial Catalog=" + lblSqlDatabaseClient.Text + ";user id="+lblSaveUserNameClient.Text +";password="+ lblSavePasswordClient.Text +"";
                    myconn3 = new MySqlConnection(SelectClientData);
                    myconn3.Open();
                    str = clientdata.ToString();
                    string query = "Select " + str + " from " + lblSqlDatabaseClient.Text + "." + lblMySqlTableNameClient.Text + "";
                    MySqlDataAdapter mydata = new MySqlDataAdapter(query, myconn3);
                    DataTable dTable = new DataTable();
                    mydata.Fill(ds1, str);
                    dv = ds1.Tables[0].DefaultView;
                    DataTable table = ds1.Tables[0];
                    dv.Sort = "" + str + " DESC";
                    myconn3.Close();
                    

                }


                //  int a = 0;
                foreach (DataTable dt in ds1.Tables)
                {

                }
                if (ds1.Tables.Count > 0)
                {
                    string strForSqlServer = string.Empty;
                    DataSet dsForSqlServer = new DataSet();
                    string strInt="";
                    foreach (var listOFSQLIntelect in checkedListBoxIntTable.CheckedItems)
                    {
                        if (checkedListBoxIntTable.SelectedIndex > -1)
                        {
                              foreach(DataRowView DriInternal in checkedListBoxIntTable.CheckedItems)
                              {
                                   strInt=DriInternal[0].ToString();
                              }
                              
                            SqlConnection sqlconForMigration;  
                             string SqlServerInsert = "Data Source=" + lblSaveSeverIpIntellect.Text + ";Initial Catalog=" + lblSqlDatabase.Text + ";user id=" + lblSaveUserNameIntellect.Text + ";password=" + lblSavePasswordIntellect.Text + "";
                           // string  SqlServerInsert = "Data Source=localhost;Initial Catalog=" + lblSqlDatabase.Text + ";user id=root;password=root";
                            foreach (DataRow dr in ds1.Tables[0].Rows)
                            {
                                
                                sqlconForMigration = new SqlConnection(SqlServerInsert);
                                sqlconForMigration.Open();
                                strForSqlServer = strInt.ToString();
                                string query = "insert into " + lblSqlTableName.Text + "(" + strForSqlServer + ") values ('" + dr[0].ToString() + "')";
                                SqlCommand cmd = new SqlCommand(query, sqlconForMigration);
                                cmd.ExecuteNonQuery();
                                sqlconForMigration.Close();
                                
                            }

                        }
                    }
                    string message = "Record Added In MSSQL Table";
                    string title = "Title";
                    MessageBox.Show(message);
                   
                      
                }

              

            }
            //string path = "D:\\Expences.xml";
            //XmlDocument doc = new XmlDocument();
            ////If there is no current file, then create a new one
            //if (!System.IO.File.Exists(path))
            //{
            //    //Create neccessary nodes
            //    XmlDeclaration declaration = doc.CreateXmlDeclaration("1.0", "UTF-8", "yes");
            //    XmlComment comment = doc.CreateComment("This is an XML Generated File");
            //    doc.AppendChild(declaration);
            //    doc.AppendChild(comment);
            //}
            //else //If there is already a file
            //{
            //    doc.Load(path);
            //}

        }