将list转换为datatable

Posted 2020-11-22 xiaoyunpeng

/// <summary>
/// 将list转换为datatable
/// </summary>
public static DataTable ToDataTable<T>(List<T> items)
{
var tb = new DataTable(typeof(T).Name);

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

foreach (PropertyInfo prop in props)
{
Type t = GetCoreType(prop.PropertyType);
tb.Columns.Add(prop.Name, t);
}

foreach (T item in items)
{
var values = new object[props.Length];

for (int i = 0; i < props.Length; i++)
{
values[i] = props[i].GetValue(item, null);
}

tb.Rows.Add(values);
}

return tb;
}

/// <summary>
/// Determine of specified type is nullable
/// </summary>
public static bool IsNullable(Type t)
{
return !t.IsValueType || (t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Nullable<>));
}

/// <summary>
/// Return underlying type if type is Nullable otherwise return the type
/// </summary>
public static Type GetCoreType(Type t)
{
if (t != null && IsNullable(t))
{
if (!t.IsValueType)
{
return t;
}
else
{
return Nullable.GetUnderlyingType(t);
}
}
else
{
return t;
}
}