标签：system Fix str efi exce null new t tab ==
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Text;
namespace MySqlHelper
{
public static class DataTableToModel
{
/// <summary>
/// DataTable通过反射获取单个像
/// </summary>
public static T ToSingleModel<T>(this DataTable data) where T : new()
{
try
{
T t = data.GetList<T>(null, true).Single();
return t;
}
catch (Exception e)
{
return new T();
}
}
/// <summary>
/// DataTable通过反射获取单个像
/// <param name="prefix">前缀</param>
/// <param name="ignoreCase">是否忽略大小写，默认不区分</param>
/// </summary>
public static T ToSingleModel<T>(this DataTable data, string prefix, bool ignoreCase = true) where T : new()
{
T t = data.GetList<T>(prefix, ignoreCase).Single();
return t;
}
/// <summary>
/// DataTable通过反射获取多个对像
/// </summary>
/// <typeparam name="type"></typeparam>
/// <param name="type"></param>
/// <returns></returns>
public static List<T> ToListModel<T>(this DataTable data) where T : new()
{
List<T> t = data.GetList<T>(null, true);
return t;
}
/// <summary>
/// DataTable通过反射获取多个对像
/// </summary>
/// <param name="prefix">前缀</param>
/// <param name="ignoreCase">是否忽略大小写，默认不区分</param>
/// <returns></returns>
private static List<T> ToListModel<T>(this DataTable data, string prefix, bool ignoreCase = true) where T : new()
{
List<T> t = data.GetList<T>(prefix, ignoreCase);
return t;
}
private static List<T> GetList<T>(this DataTable data, string prefix, bool ignoreCase = true) where T : new()
{
List<T> t = new List<T>();
int columnscount = data.Columns.Count;
if (ignoreCase)
{
for (int i = 0; i < columnscount; i++)
data.Columns[i].ColumnName = data.Columns[i].ColumnName.ToUpper();
}
try
{
var properties = new T().GetType().GetProperties();
var rowscount = data.Rows.Count;
for (int i = 0; i < rowscount; i++)
{
var model = new T();
foreach (var p in properties)
{
var keyName = prefix + p.Name + "";
if (ignoreCase)
keyName = keyName.ToUpper();
for (int j = 0; j < columnscount; j++)
{
if (data.Columns[j].ColumnName == keyName && data.Rows[i][j] != null)
{
string pval = data.Rows[i][j].ToString();
if (!string.IsNullOrEmpty(pval))
{
try
{
// We need to check whether the property is NULLABLE
if (p.PropertyType.IsGenericType && p.PropertyType.GetGenericTypeDefinition() == typeof(Nullable<>))
{
p.SetValue(model, Convert.ChangeType(data.Rows[i][j], p.PropertyType.GetGenericArguments()[0]), null);
}
else
{
p.SetValue(model, Convert.ChangeType(data.Rows[i][j], p.PropertyType), null);
}
}
catch (Exception x)
{
throw x;
}
}
break;
}
}
}
t.Add(model);
}
}
catch (Exception ex)
{
throw ex;
}
return t;
}
}
}
标签：system Fix str efi exce null new t tab ==
原文地址：https://blog.51cto.com/12268222/2377994
