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表"t_dict_hydm_xl"

Xlcode XlName

01 油料的种植
02 豆类的种植
03 棉花的种植
04 麻类的种植
05 烟草的种植

... ....

请问如何查到Xlcode为“04”的那条记录的实体？小弟初学，请给出完速的代码，谢谢

相关文件代码如下

XML code

C# code
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;

using System.Windows.Data;
using Test.Web;

namespace Test
{
public partial class ChildWindowDataGridEdit : ChildWindow
{
DomainServiceCustom custom;

public ChildWindowDataGridEdit()
{
InitializeComponent();
custom = new DomainServiceCustom();

WindowShow();

}

void WindowShow()
{
//这里面应该怎么写啊
t_dict_hydm_xl customHydmXl = new t_dict_hydm_xl();

txtXlCode.IsEnabled = false;
txtXlCode.Text = Temp.strTmp.ToString().Trim();

//这地方怎么写
txtXlName.Text =

}

private void OKButton_Click(object sender, RoutedEventArgs e)
{
this.DialogResult = true;
}

private void CancelButton_Click(object sender, RoutedEventArgs e)
{
this.DialogResult = false;
}
}
}