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using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
namespace DTS
{
class Program
{
static void Main(string[] args)
{
DataTable _dt = new DataTable();
_dt.Columns.Add("id", typeof(int));
_dt.Columns.Add("name", typeof(string));
_dt.Columns.Add("address", typeof(string));
DataRow _dr = _dt.NewRow();
_dr["id"] = 1;
_dr["name"] = "xiaodong";
_dr["address"] = "beijing";
_dt.Rows.Add(_dr);
_dt.Rows.Add(_dr.ItemArray);
_dt.Rows.Add(_dr.ItemArray);
_dr = _dt.NewRow();
_dr["id"] = 1;
_dr["name"] = "xiaodong";
_dr["address"] = "shanghai";
_dt.Rows.Add(_dr);
_dr = _dt.NewRow();
_dr["id"] = 3;
_dr["name"] = "xiaoming";
_dr["address"] = "guangdong";
_dt.Rows.Add(_dr);
_dr = _dt.NewRow();
_dr["id"] = 4;
_dr["name"] = "xudaxia";
_dr["address"] = "fujian";
_dt.Rows.Add(_dr);
_dt.Rows.Add(_dr.ItemArray);
Console.WriteLine("--------------------原来有重复数据的Table----------------------");
_dt.AsEnumerable().ToList().ForEach(
m=>
{
Console.WriteLine(m["id"].ToString() + " " + m["name"].ToString() + " " + m["address"].ToString());
});
Console.WriteLine("--------------------去除重复后的Table----------------------");
var _comPresult = _dt.AsEnumerable().Distinct(new DataTableRowCompare());
DataTable _resultDt = _comPresult.CopyToDataTable();
_resultDt.AsEnumerable().ToList().ForEach(
x =>
{
Console.WriteLine(x["id"].ToString() + " " + x["name"].ToString() + " " + x["address"].ToString());
});
Console.Read();
}
public class DataTableRowCompare: IEqualityComparer<DataRow>
{
#region IEqualityComparer<DataRow> 成员
public bool Equals(DataRow x, DataRow y)
{
return ((x.Field<int>("id") == y.Field<int>("id") && x.Field<string>("name") == y.Field<string>("name") && x.Field<string>("address") == y.Field<string>("address")));
}
public int GetHashCode(DataRow obj)
{
return obj.ToString().GetHashCode();
}
#endregion
}
}
}