将DataTable转换为List，将List转换为DataTable的实现类
public static class DataTableHelper
{ public static DataTable ConvertTo<T>(IList<T> list)
{
DataTable table \= CreateTable<T>();
Type entityType \= typeof(T);
PropertyDescriptorCollection properties \= TypeDescriptor.GetProperties(entityType); foreach (T item in list)
{
DataRow row \= table.NewRow(); foreach (PropertyDescriptor prop in properties)
row\[prop.Name\] \= prop.GetValue(item);
table.Rows.Add(row);
} return table;
} public static IList<T> ConvertTo<T>(IList<DataRow> rows)
{
IList<T> list = null; if (rows != null)
{
list \= new List<T>(); foreach (DataRow row in rows)
{
T item \= CreateItem<T>(row);
list.Add(item);
}
} return list;
} public static IList<T> ConvertTo<T>(DataTable table)
{ if (table == null) return null;
List<DataRow> rows = new List<DataRow>(); foreach (DataRow row in table.Rows)
rows.Add(row); return ConvertTo<T>(rows);
} //Convert DataRow into T Object
public static T CreateItem<T>(DataRow row)
{ string columnName;
T obj \= default(T); if (row != null)
{
obj \= Activator.CreateInstance<T>(); foreach (DataColumn column in row.Table.Columns)
{
columnName \= column.ColumnName; //Get property with same columnName
PropertyInfo prop = obj.GetType().GetProperty(columnName); try { //Get value for the column
object value = (row\[columnName\].GetType() == typeof(DBNull)) ? null : row\[columnName\]; //Set property value
if (prop.CanWrite) //判断其是否可写
prop.SetValue(obj, value, null);
} catch { throw; //Catch whatever here
}
}
} return obj;
} public static DataTable CreateTable
{
Type entityType = typeof(T);
DataTable table = new DataTable(entityType.Name);
PropertyDescriptorCollection properties = TypeDescriptor.GetProperties(entityType); foreach (PropertyDescriptor prop in properties)
table.Columns.Add(prop.Name, prop.PropertyType); return table;
}
}
