The method below converts an array of objects to a DataTable object in C#.

public static DataTable GetDataTableFromObjects(object[] objects)
{
if (objects != null && objects.Length > 0)
{
Type t = objects[0].GetType();
DataTable dt = new DataTable(t.Name);
foreach (PropertyInfo pi in t.GetProperties())
{
dt.Columns.Add(new DataColumn(pi.Name));
}
foreach (var o in objects)
{
DataRow dr = dt.NewRow();
foreach (DataColumn dc in dt.Columns)
{
dr[dc.ColumnName] = o.GetType().GetProperty(dc.ColumnName).GetValue(o, null);
}
dt.Rows.Add(dr);
}
return dt;
}
return null;
}

/// <summary>
/// ToDataTable
/// </summary>
/// <typeparam name="T">实体</typeparam>
/// <param name="items">实体集</param>
/// <returns></returns>
public static DataTable ToDataTable<T>(this IEnumerable<T> items)
{
var tb = new DataTable(typeof(T).Name);

PropertyInfo[] props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);

foreach (var prop in props)
{
tb.Columns.Add(prop.Name, prop.PropertyType);
}

foreach (var item in items)
{
var values = new object[props.Length];
for (var i = 0; i < props.Length; i++)
{
values[i] = props[i].GetValue(item, null);
}

tb.Rows.Add(values);
}

return tb;
}