实例介绍
[实例简介]GhExcel 将datatable 转换成实体类 例子源码下载
[实例截图]
[核心代码]
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
/**
* 作者：黄炳桂
* Email:516821420@qq.com
*/
namespace GhOrm
{
public class GhExcel<T> where T : new()
{
/// <summary>
///
/// </summary>
/// <param name="keys"></param>
/// <param name="dt"></param>
/// <returns></returns>
public static List<T> ToList(string keys, DataTable dt)
{
return GhConvert<T>.ToList(keys, dt);
}
/// <summary>
///
/// </summary>
/// <param name="fileName"></param>
/// <returns></returns>
public static DataTable ToDataTable(string fileName)
{
//var book = new Workbook(fileName);
//worksheet sheet = book.Worksheets[0];
//Cells cells = sheet.Cells;
//DataTable dt = cells.ExportDataTableAsString(0, 0, cells.MaxDataRow 1, cells.MaxDataColomn 1, true);
return null;
}
/// <summary>
///
/// </summary>
/// <param name="keys"></param>
/// <param name="dt"></param>
/// <returns></returns>
public static Boolean IsColumnNamesEqual(string keys, DataTable dt)
{
var columnNames = (from DataColumn column in dt.Columns select column.ColumnName).ToList();
string dtColumnNames = string.Join(",", columnNames);
return keys == dtColumnNames;
}
/// <summary>
///
/// </summary>
/// <param name="keys"></param>
/// <param name="dt"></param>
/// <returns></returns>
public static Boolean IsColumnCountEqual(string keys, DataTable dt)
{
string[] splitKeys = keys.Split(',');
return splitKeys.Count() == dt.Columns.Count;
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Reflection;
/**
* 作者：黄炳桂
* Email:516821420@qq.com
*/
namespace GhOrm
{
public class GhConvert<T> where T : new()
{
/// <summary>
/// 将DataTable转换成Model实体
/// </summary>
/// <param name="obj">Model名称</param>
/// <param name="dt">DataTable</param>
/// <returns></returns>
public static T ToObject(DataTable dt)
{
if (dt.Rows.Count <= 0) return new T();
T t = new T();
string tempName = "";
PropertyInfo[] pis = t.GetType().GetProperties();
foreach (PropertyInfo pi in pis)
{
tempName = pi.Name;
if (dt.Columns.Contains(tempName))
{
// 判断此属性是否有Setter
if (!pi.CanWrite) continue;
object value = dt.Rows[0][tempName];
if (value != DBNull.Value)
{
if (dt.Rows[0][pi.Name].GetType().Name.ToString().ToLower() == "datetime")
pi.SetValue(t, value.ToString(), null);
else
pi.SetValue(t, value, null);
}
}
}
return t;
}
/// <summary>
///
/// </summary>
/// <typeparam name="T1"></typeparam>
/// <typeparam name="T2"></typeparam>
/// <param name="t1"></param>
/// <param name="t2"></param>
public static void ToObject<T1, T2>(T1 t1, T2 t2)
{
PropertyInfo[] t1Properties = t1.GetType().GetProperties();
PropertyInfo[] t2Properties = t2.GetType().GetProperties();
foreach (PropertyInfo p in t1Properties)
{
if (p == null) continue;
var t2Property = t2Properties.FirstOrDefault(m => m.Name == p.Name);
if (t2Property == null) continue;
object dstV = p.GetValue(t1, null);
object srcV = t2Property.GetValue(t2, null);
if (dstV != null && srcV != null)
if (dstV.ToString() == srcV.ToString()) continue;
p.SetValue(t1, srcV, null);
}
}
/// <summary>
///
/// </summary>
/// <typeparam name="T2"></typeparam>
/// <param name="t2"></param>
/// <returns></returns>
public static T ToObject<T2>(T2 t2)
{
var t1 = new T();
PropertyInfo[] t1Properties = t1.GetType().GetProperties();
PropertyInfo[] t2Properties = t2.GetType().GetProperties();
foreach (PropertyInfo p in t1Properties)
{
if (p == null) continue;
var t2Property = t2Properties.FirstOrDefault(m => m.Name == p.Name);
if (t2Property == null) continue;
object dstV = p.GetValue(t1, null);
object srcV = t2Property.GetValue(t2, null);
if (dstV != null && srcV != null)
if (dstV.ToString() == srcV.ToString()) continue;
p.SetValue(t1, srcV, null);
}
return t1;
}
/// <summary>
/// 将DataTable转换成IList
/// </summary>
/// <param name="dt">要转换的DataTable</param>
/// <returns>返回IList</returns>
public static IList<T> ToList(DataTable dt)
{
IList<T> list = new List<T>();
string tempName = "";
foreach (DataRow dr in dt.Rows)
{
T t = new T();
// 获得此模型的公共属性
PropertyInfo[] propertys = t.GetType().GetProperties();
foreach (PropertyInfo pi in propertys)
{
tempName = pi.Name;
// 检查DataTable是否包含此列
if (dt.Columns.Contains(tempName))
{
// 判断此属性是否有Setter
if (!pi.CanWrite) continue;
object value = dr[tempName];
if (value != DBNull.Value)
{
if (dr[pi.Name].GetType().Name.ToString().ToLower() == "datetime")
pi.SetValue(t, value.ToString(), null);
else
pi.SetValue(t, value, null);
}
}
}
list.Add(t);
}
return list;
}
/// <summary>
///
/// </summary>
/// <param name="keys"></param>
/// <param name="dt"></param>
/// <returns></returns>
public static List<T> ToList(string keys, DataTable dt)
{
List<T> lists = new List<T>();
string[] splitKeys = keys.Split(',');
PropertyInfo[] properties = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
for (var row = 0; row < dt.Rows.Count; row )
{
var t = new T();
for (var column = 0; column < dt.Columns.Count; column )
{
try
{
var value = dt.Rows[row][column].ToString();
if (value == "") continue;
if (column > splitKeys.Count()) break;
PropertyInfo property = properties.FirstOrDefault(m => m.Name == splitKeys[column]);
if (property == null) continue;
if (value.GetType().Name.ToString().ToLower() == "datetime")
property.SetValue(t, value.ToString(), null);
else
property.SetValue(t, value, null);
}
catch (Exception e)
{
e.HelpLink = "导入数据第" (row 1) "行" dt.Columns[column].ColumnName "数据格式有误！";
throw e;
}
}
lists.Add(t);
}
return lists;
}
/// <summary>
///
/// </summary>
/// <param name="ts"></param>
/// <returns></returns>
public static DataTable ToDataTable(IEnumerable<T> ts) {
var propertyInfos=new List<PropertyInfo>();
Type type=typeof(T);
var dt=new DataTable();
Array.ForEach<PropertyInfo>(type.GetProperties(),p=>{propertyInfos.Add(p);dt.Columns.Add(p.Name,p.PropertyType);});
foreach(var item in ts){
DataRow row=dt.NewRow();
propertyInfos.ForEach(p=>row[p.Name]=p.GetValue(item,null));
dt.Rows.Add(row);
}
return dt;
}
/// <summary>
///
/// </summary>
/// <param name="keys"></param>
/// <param name="dt"></param>
/// <returns></returns>
public static Boolean IsColumnNamesEqual(string keys, DataTable dt)
{
var columnNames = (from DataColumn column in dt.Columns select column.ColumnName).ToList();
string dtColumnNames = string.Join(",", columnNames);
return keys == dtColumnNames;
}
}
}
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