IList to datatable

来源：互联网发布：mac 电源爆编辑：程序博客网时间：2024/06/05 16:32

http://adofer.blog.163.com/blog/static/417381562009811354145/

通过 NHibernate 查询返回的表数据通常都是IList<T>，但在实际使用中有些数据控件在数据绑定上对IList的支持并不是很好，所以有时候将IList转换成DataSet还是有必要的。

// <summary>
        /// Ilist<T> 转换成 DataSet
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        public static DataSet ConvertToDataSet<T>(IList<T> i_objlist)
        {
            if (i_objlist == null || i_objlist.Count <= 0)
            {
                return null;
            }

            DataSet ds = new DataSet();
            DataTable dt = new DataTable(typeof(T).Name);
            DataColumn column;
            DataRow row;

System.Reflection.PropertyInfo[] myPropertyInfo = typeof(T).GetProperties(System.Reflection.BindingFlags.Public

| System.Reflection.BindingFlags.Instance);

foreach (T t in i_objlist)


            {
                if (t == null)
                {
                    continue;
                }

                row = dt.NewRow();

                for (int i = 0, j = myPropertyInfo.Length; i < j; i++)
                {
                    System.Reflection.PropertyInfo pi = myPropertyInfo[i];

                    string name = pi.Name;

                    if (dt.Columns[name] == null)
                    {
                        column = new DataColumn(name, pi.PropertyType);
                        dt.Columns.Add(column);
                    }

                    row[name] = pi.GetValue(t, null);
                }

                dt.Rows.Add(row);
            }
                if (t == null)

                {

                    continue;
                }
                }
                row = dt.NewRow();


                for (int i = 0, j = myPropertyInfo.Length; i < j; i++)

                {
                    System.Reflection.PropertyInfo pi
                    System.Reflection.PropertyInfo pi = myPropertyInfo[i];


                    string name = pi.Name;


                    if (dt.Columns[name] == null)

                    {
                        column
                        column = new DataColumn(name, pi.PropertyType);
                        dt.Columns.Add(column);
                    }
                        dt.Columns.Add(column);
                    }
                    row[name] = pi.GetValue(t, null);
                }
                }
                dt.Rows.Add(row);
            }
                if (t == null)


                {

                    continue;
                }
                }
                row = dt.NewRow();


                for (int i = 0, j = myPropertyInfo.Length; i < j; i++)

                {
                    System.Reflection.PropertyInfo pi
                    System.Reflection.PropertyInfo pi = myPropertyInfo[i];


                    string name = pi.Name;


                    if (dt.Columns[name] == null)

                    {
                        column
                        column = new DataColumn(name, pi.PropertyType);
                        dt.Columns.Add(column);
                    }
                        dt.Columns.Add(column);
                    }
                    row[name] = pi.GetValue(t, null);
                }
                }
                dt.Rows.Add(row);
            }
            ds.Tables.Add(dt);
            return ds;
        }
        }
  /// <summary>
        /// Ilist<T> 转换成 DataTable
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        public static DataTable ConvertToDataTable<T>(IList<T> i_objlist)
        {
            if (i_objlist == null || i_objlist.Count <= 0)
            {
                return null;
            }
            DataTable dt = new DataTable(typeof(T).Name);
            DataColumn column;
            DataRow row;
System.Reflection.PropertyInfo[] myPropertyInfo = typeof(T).GetProperties(System.Reflection.BindingFlags.Public
| System.Reflection.BindingFlags.Instance);
foreach (T t in i_objlist)
            {
                if (t == null)
                {
                    continue;
                }

                row = dt.NewRow();

                for (int i = 0, j = myPropertyInfo.Length; i < j; i++)
                {
                    System.Reflection.PropertyInfo pi = myPropertyInfo[i];

                    string name = pi.Name;

                    if (dt.Columns[name] == null)
                    {
                        column = new DataColumn(name, pi.PropertyType);
                        dt.Columns.Add(column);
                    }

                    row[name] = pi.GetValue(t, null);
                }

                dt.Rows.Add(row);
            }
            return dt;
        }

/// <summary>
        /// Ilist 转换成 DataTable
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        public static DataTable ConvertToDataTable(IList i_objlist)
        {
            if (i_objlist == null || i_objlist.Count <= 0)
            {
                return null;
            }
            DataTable dt = new DataTable();
            DataRow row;

            System.Reflection.PropertyInfo[] myPropertyInfo = i_objlist[0].GetType().GetProperties();

            foreach (System.Reflection.PropertyInfo pi in myPropertyInfo)
            {
                if (pi == null)
                {
                    continue;
                }
                dt.Columns.Add(pi.Name, System.Type.GetType(pi.PropertyType.ToString()));
            }
            for (j = 0; j < i_objlist.Count; j++)
            {
                row = dt.NewRow();
                for (int i = 0; i < myPropertyInfo.Length; i++)
                {
                    System.Reflection.PropertyInfo pi = myPropertyInfo[i];
                    row[pi.Name] = pi.GetValue(t, null);
                }
                dt.Rows.Add(row);
            }
            return dt;
        }
        /// <summary>
        /// Ilist 转换成 DataSet
        /// </summary>
        /// <param name="list"></param>
        /// <returns></returns>
        public static DataSet ConvertToDataSet(IList i_objlist)
        {
            if (i_objlist == null || i_objlist.Count <= 0)
            {
                return null;
            }
            DataSet ds = new DataSet();
            DataTable dt = new DataTable();
            DataRow row;

            System.Reflection.PropertyInfo[] myPropertyInfo = i_objlist[0].GetType().GetProperties();

            foreach (System.Reflection.PropertyInfo pi in myPropertyInfo)
            {
                if (pi == null)
                {
                    continue;
                }
                dt.Columns.Add(pi.Name, System.Type.GetType(pi.PropertyType.ToString()));
            }
            for (j = 0; j < i_objlist.Count; j++)
            {
                row = dt.NewRow();
                for (int i = 0; i < myPropertyInfo.Length; i++)
                {
                    System.Reflection.PropertyInfo pi = myPropertyInfo[i];
                    row[pi.Name] = pi.GetValue(t, null);
                }
                dt.Rows.Add(row);
            }
            ds.Tables.Add(dt);
            return ds;
        }