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Convert Data Table into XML in Asp.Net and pass it to sql server database

Code :


dt.TableName = "dt";
                                string XMLData = "";
                                using (StringWriter sw = new StringWriter())
                                {
                                    dt.WriteXml(sw, false);
                                    XMLData = ParseXpathString(sw.ToString());
                                }

                                SqlParameter[] param = new SqlParameter[2];
                                DataSet ds = new DataSet();
                                //param[0] = new SqlParameter("@RegistrationNo", login Name);
                                param[0] = new SqlParameter("@grouptag", previousloginname);
                                param[1] = new SqlParameter("XMLData", SqlDbType.Xml);
                                param[1].Value = XMLData;
                                ds = SqlHelper.ExecuteDataset(con, CommandType.StoredProcedure, "procedure _Name", param);
                                lblPnlPreferencesException.ForeColor = System.Drawing.Color.Green;
                                lblPnlPreferencesException.Text = "Submited Successfully";

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