本文主要是介绍Table是怎样炼成的：SaleReport Table的继承者，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
有了Table，我们对其继承，实现更符合业务要求的类 1 
/**/ /// <summary>
2
/// 描述一个销售报表
3
/// </summary>
4
public class SaleReport : Table
5 
{
6
7 public SaleReport(string reportName)
8 : base(reportName, new ColumnCollection())
9
{
10
11 this.Columns.Add("序号", typeof(int), 0);
12 this.Columns.Add("姓名", typeof(string), null);
13 this.Columns.Add("商品名称", typeof(string), null);
14 this.Columns.Add("日期", typeof(DateTime), null);
15 this.Columns.Add("数量", typeof(double), null);
16
}
17
18 /**//// <summary>
19 /// 报表的名称
20 /// </summary>
21 public string Name
22 {
23 get
24 {
25 return this.Name;
26 }
27 }
28
29 /**//// <summary>
30 /// 加入数据
31 /// </summary>
32 /// <param name="staff"></param>
33 /// <param name="commodity"></param>
34 /// <param name="cash"></param>
35 public void AddRecord(string staff, string commodity, double cash)
36 {
37 Row row = this.NewRow();
38 row["序号"] = this.Rows.Count + 1;
39 row["姓名"] = staff;
40 row["商品名称"] = commodity;
41 row["日期"] = DateTime.Now;
42 row["数量"] = cash;
43
44 this.Rows.Add(row);
45 }
46
47 /**//// <summary>
48 /// 移除数据
49 /// </summary>
50 /// <param name="index"></param>
51 public void RemoveAt(int index)
52 {
53 this.Rows.RemoveAt(index);
54 }
55
56 /**//// <summary>
57 /// 返回销售报表的销售金额
58 /// </summary>
59 /// <returns></returns>
60 public double GetTotal()
61 {
62 double cash = 0;
63 foreach (Row row in this.Rows)
64 {
65 cash += (double)row["数量"];
66 }
67 return cash;
68 }
69
70 /**//// <summary>
71 /// 返回销售报表的销售金额
72 /// </summary>
73 /// <param name="staff">销售员</param>
74 /// <returns></returns>
75 public double GetTotal(string staff)
76 {
77 double cash = 0;
78 foreach (Row row in this.Rows)
79 {
80 if ((string)row["姓名"] == staff)
81 {
82 cash += (double)row["数量"];
83 }
84 }
85 return cash;
86 }
87
88 }
/**/ /// <summary>2
/// 描述一个销售报表3
/// </summary> 4
public class SaleReport : Table5
{6
7
public SaleReport(string reportName)8
: base(reportName, new ColumnCollection())9
{10
11
this.Columns.Add("序号", typeof(int), 0);12
this.Columns.Add("姓名", typeof(string), null);13
this.Columns.Add("商品名称", typeof(string), null);14
this.Columns.Add("日期", typeof(DateTime), null);15
this.Columns.Add("数量", typeof(double), null);16
}17
18
/**//// <summary>19
/// 报表的名称20
/// </summary>21
public string Name22
{23
get24
{25
return this.Name;26
}27
}28
29
/**//// <summary>30
/// 加入数据31
/// </summary>32
/// <param name="staff"></param>33
/// <param name="commodity"></param>34
/// <param name="cash"></param>35
public void AddRecord(string staff, string commodity, double cash)36
{37
Row row = this.NewRow();38
row["序号"] = this.Rows.Count + 1;39
row["姓名"] = staff;40
row["商品名称"] = commodity;41
row["日期"] = DateTime.Now;42
row["数量"] = cash;43
44
this.Rows.Add(row);45
}46
47
/**//// <summary>48
/// 移除数据49
/// </summary>50
/// <param name="index"></param>51
public void RemoveAt(int index)52
{53
this.Rows.RemoveAt(index);54
}55
56
/**//// <summary>57
/// 返回销售报表的销售金额58
/// </summary>59
/// <returns></returns>60
public double GetTotal()61
{62
double cash = 0;63
foreach (Row row in this.Rows)64
{65
cash += (double)row["数量"];66
}67
return cash;68
}69
70
/**//// <summary>71
/// 返回销售报表的销售金额72
/// </summary>73
/// <param name="staff">销售员</param>74
/// <returns></returns>75
public double GetTotal(string staff)76
{77
double cash = 0;78
foreach (Row row in this.Rows)79
{80
if ((string)row["姓名"] == staff)81
{82
cash += (double)row["数量"];83
}84
}85
return cash;86
}87
88
}
SaleReport对外封装了对Table的处理细节，使用SaleReport的用户不会感觉到在使用Table类
1 SaleReport report = new SaleReport( " 销售台帐 " );
2 report.AddRecord( " Alex " , " Phone " , 2600 );
3 report.AddRecord( " Alex " , " PC " , 4560 );
4 report.AddRecord( " Alex " , " Table " , 234 );
5 report.AddRecord( " Sidney " , " Phone " , 2100 );
6 report.AddRecord( " Sidney " , " TV " , 4500 );
7 report.AddRecord( " Tom " , " oven " , 300 );
8 report.AddRecord( " Leo " , " oven " , 240 );
9
10 report.Print();
SaleReport report = new SaleReport( " 销售台帐 " );2
report.AddRecord( " Alex " , " Phone " , 2600 );3
report.AddRecord( " Alex " , " PC " , 4560 );4
report.AddRecord( " Alex " , " Table " , 234 );5
report.AddRecord( " Sidney " , " Phone " , 2100 );6
report.AddRecord( " Sidney " , " TV " , 4500 );7
report.AddRecord( " Tom " , " oven " , 300 );8
report.AddRecord( " Leo " , " oven " , 240 );9
10
report.Print();
运行的结果是
序号 姓名 商品名称 日期 数量
1 Alex Phone 2007-2-13 23:19:27 2600
2 Alex PC 2007-2-13 23:19:27 4560
3 Alex Table 2007-2-13 23:19:27 234
4 Sidney Phone 2007-2-13 23:19:27 2100
5 Sidney TV 2007-2-13 23:19:27 4500
6 Tom oven 2007-2-13 23:19:27 300
7 Leo oven 2007-2-13 23:19:27 240
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