通过SqlHelper读取得DataSet 怎么更新？

        DataSet ds = SqlHelper.ExecuteDataset(con, CommandType.Text, "select* from student");
        foreach (DataRow col in ds.Tables[0].Rows) 
        {
                 Response.Write(col["name"].ToString());
        } 

                    通过SqlHelper读出的DATASET 怎么更新？自己写的DATASET 我知道怎么更新，而通过SqlHelper读出来的，就不会了，麻烦各位大侠。

哪里来的SqlHelper，里面怎么定义的。
试试看直接写update sql语句呢。

public class SqlHelper {

/**
 * 通过命名空间方式获取sql
 * @param sqlSessionFactory
 * @param namespace
 * @param params
 * @return
 */
public static String getNamespaceSql(SqlSessionFactory sqlSessionFactory, String namespace, Object params) {
    params = wrapCollection(params);
    Configuration configuration = sqlSessionFactory.getConfiguration();
    MappedStatement mappedStatement = configuration.getMappedStatement(namespace);
    TypeHandlerRegistry typeHandlerRegistry = mappedStatement.getConfiguration().getTypeHandlerRegistry();
    BoundSql boundSql = mappedStatement.getBoundSql(params);
    List<ParameterMapping> parameterMappings = boundSql.getParameterMappings();
    StringBuilder sqlStringBuilder = new StringBuilder(boundSql.getSql().replaceAll("\n", ""));
    if (params != null && parameterMappings != null && parameterMappings.size() > 0) {
        for (ParameterMapping parameterMapping : parameterMappings) {
            if (parameterMapping.getMode() != ParameterMode.OUT) {
                Object value;
                String propertyName = parameterMapping.getProperty();
                if (boundSql.hasAdditionalParameter(propertyName)) {
                    value = boundSql.getAdditionalParameter(propertyName);
                } else if (typeHandlerRegistry.hasTypeHandler(params.getClass())) {
                    value = params;
                } else {
                    MetaObject metaObject = configuration.newMetaObject(params);
                    value = metaObject.getValue(propertyName);
                }
                JdbcType jdbcType = parameterMapping.getJdbcType();
                if (jdbcType == null) {
                    jdbcType = VARCHAR;
                }
                replaceParameter(sqlStringBuilder, value, jdbcType);
            }
        }
    }
    return sqlStringBuilder.toString();
}

/**
 * 根据类型替换参数
 * 仅作为数字和字符串两种类型进行处理，需要特殊处理的可以继续完善这里
 *
 * @param sqlStringBuilder
 * @param value
 * @param jdbcType
 * @return
 */
private static void replaceParameter(StringBuilder sqlStringBuilder, Object value, JdbcType jdbcType) {
    if (value == null) {
        return;
    }

    String strValue = String.valueOf(value);
    switch (jdbcType) {
        //数字
        case BIT:
            break;
        case TINYINT:
            break;
        case SMALLINT:
            break;
        case INTEGER:
            break;
        case BIGINT:
            break;
        case FLOAT:
            break;
        case REAL:
            break;
        case DOUBLE:
            break;
        case NUMERIC:
            break;
        case DECIMAL:
            break;
        //其他，包含字符串和其他特殊类型，加单引号
        default:
            strValue = "'" + strValue + "'";
    }
    int index = sqlStringBuilder.indexOf("?");
    sqlStringBuilder.replace(index, index+1, strValue);
}

/**
 * 简单包装参数
 *
 * @param object
 * @return
 */
private static Object wrapCollection(final Object object) {
    if (object instanceof List) {
        Map<String, Object> map = new HashMap<>();
        map.put("list", object);
        return map;
    } else if (object != null && object.getClass().isArray()) {
        Map<String, Object> map = new HashMap<>();
        map.put("array", object);
        return map;
    }
    return object;
}

}