比较DataTable中新旧数据
博客园这个编辑器导致我FF多次崩溃,真是太有问题了。
内容不写了,代码上都做了写注释。
1
/// <summary>
2
/// 比较两个数据表,并返回比较结果表
3
/// 比较条件:
4
/// 1.两个表结构相同;
5
/// 2.两个表排序都是按主键顺序排序;
6
/// 3.两个表都不为空;
7
/// </summary>
8
/// <param name="newTable">新数据</param>
9
/// <param name="oldTable">旧数据</param>
10
/// <param name="parmaryKey">表主键名称</param>
11
/// <param name="colState">状态列名称</param>
12
/// <param name="stateValue">不相同时状态值</param>
13
/// <returns>结果数据表 </returns>
14
public static DataTable CompareData(
15
this DataTable newTable,
16
DataTable oldTable,
17
string parmaryKey,
18
string colState,
19
object stateValue)
20
{
21
int newTableCount = newTable.Rows.Count;
22
int oldTableCount = oldTable.Rows.Count;
23![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
24
////比较结果表
25
DataTable resultTable = newTable.Clone();
26![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
27
int i = 0, j = 0;
28
do
29
{
30
DataRow dr1 = null;
31
DataRow dr2 = null;
32![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
33
////结果行
34
DataRow rDr = resultTable.NewRow();
35![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
36
////如果超出旧表,则新表所有其他列进行添加
37
if (j < oldTableCount)
38
{
39
dr2 = oldTable.Rows[j];
40
}
41
else
42
{
43
for (int k = i; k < newTableCount; k++)
44
{
45
DataRow rDr2 = resultTable.NewRow();
46
rDr2.ItemArray = newTable.Rows[k].ItemArray;
47
resultTable.Rows.Add(rDr2);
48
}
49
////添加完成后退出
50
break;
51
}
52![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
53
////如果超出新表,则将旧表剩余数据设置状态值并添加到结果表中
54
if (i < newTableCount)
55
{
56
dr1 = newTable.Rows[i];
57
}
58
else
59
{
60
for (int k = j; k < oldTableCount; k++)
61
{
62
DataRow rDr2 = resultTable.NewRow();
63
rDr2.ItemArray = oldTable.Rows[k].ItemArray;
64
rDr2[colState] = stateValue;
65
resultTable.Rows.Add(rDr2);
66
}
67
////添加完成后退出
68
break;
69
}
70![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
71
int result = string.Compare(dr1[parmaryKey].ToString(), dr2[parmaryKey].ToString(), true);
72![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
73
switch (result)
74
{
75
////新表小于则移动新表
76
case -1:
77
i++;
78
rDr.ItemArray = dr1.ItemArray;
79
resultTable.Rows.Add(rDr);
80
break;
81![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
82
////相同加入结果,两个表同时向下移动
83
case 0:
84
i++; j++;
85
rDr.ItemArray = dr1.ItemArray;
86
resultTable.Rows.Add(rDr);
87
break;
88![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
89
////新表大于则移动旧表
90
case 1:
91
j++;
92
rDr.ItemArray = dr2.ItemArray;
93
rDr[colState] = stateValue;
94
resultTable.Rows.Add(rDr);
95
break;
96![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
97
}
98
} while (i <= newTableCount);
99![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
100
return resultTable;
101
}
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
2
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
3
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
4
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
5
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
6
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
7
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
8
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
9
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
10
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
11
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
12
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
13
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
14
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
15
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
16
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
17
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
18
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
19
![](https://www.cnblogs.com/Images/OutliningIndicators/None.gif)
20
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockStart.gif)
21
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
22
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
23
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
24
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
25
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
26
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
27
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
28
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
29
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
30
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
31
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
32
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
33
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
34
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
35
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
36
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
37
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
38
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
39
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
40
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
41
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
42
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
43
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
44
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
45
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
46
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
47
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
48
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
49
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
50
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
51
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
52
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
53
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
54
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
55
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
56
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
57
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
58
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
59
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
60
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
61
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
62
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
63
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
64
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
65
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
66
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
67
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
68
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
69
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
70
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
71
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
72
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
73
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
74
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
75
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
76
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
77
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
78
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
79
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
80
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
81
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
82
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
83
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
84
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
85
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
86
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
87
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
88
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
89
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
90
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
91
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
92
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
93
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
94
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
95
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
96
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
97
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
98
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
99
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
100
![](https://www.cnblogs.com/Images/OutliningIndicators/InBlock.gif)
101
![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedBlockEnd.gif)
通过了多种情况下的测试。如果代码存在问题,欢迎指正!