WINFORM 多条件动态查询 通用代码的设计与实现
经常碰到多条件联合查询的问题，以前的习惯认为很简单总会从头开始设计布局代码，往往一个查询面要费上老半天的功夫，而效果也不咋地。
前段时间做了个相对通用的多条件动态查询面，复用起来还是挺方便的，放上来共参考指导 。
供下载的源文件链接 ： 多条件动态查询通用模板下载
主要的运行后布局：
主要的通用功能和要求:
主要的方法体：
动态的显示查询条件：
1
//
初始化联合查询的页面显示
2
3
private
void
ConditionBind()
4
{
5
//查询条件邦定
6
DataTable dt = new DataTable();
7 DataColumnCollection columns = dt.Columns;
8 columns.Add("name");
9 columns.Add("key");
10 DataRowCollection rows = dt.Rows;
11 rows.Add("所有", "All");
12 rows.Add("单据号", "Code");
13 rows.Add("供应商名称", "SupplierName");
14 rows.Add("经办人", "EmployeesName");
15 rows.Add("时间", "time");
18 try
19 {
20 for (int i = 0; i < this.fpl.Controls.Count; i++)
21 {
23 if (this.Controls.Find("fpl" + i, true).Length > 0)
24 {
25 ((ComboBox)this.Controls.Find("cbSelect" + i, true)[0]).DisplayMember = "name";
26 ((ComboBox)this.Controls.Find("cbSelect" + i, true)[0]).ValueMember = "key";
27 //用copy解决联动问题
28 ((ComboBox)this.Controls.Find("cbSelect" + i, true)[0]).DataSource = dt.Copy();
29
}
31 }
34 }
35 catch (Exception ex)
36 {
37 MessageBox.Show(ex.Message);
38 }
42
}
//
初始化联合查询的页面显示
2
3
private
void
ConditionBind()4
{
5
//查询条件邦定6
DataTable dt = new DataTable();7
DataColumnCollection columns = dt.Columns;8
columns.Add("name");9
columns.Add("key");10
DataRowCollection rows = dt.Rows;11
rows.Add("所有", "All");12
rows.Add("单据号", "Code");13
rows.Add("供应商名称", "SupplierName");14
rows.Add("经办人", "EmployeesName");15
rows.Add("时间", "time"); 18
try19
{20
for (int i = 0; i < this.fpl.Controls.Count; i++)21
{23
if (this.Controls.Find("fpl" + i, true).Length > 0)24
{25
((ComboBox)this.Controls.Find("cbSelect" + i, true)[0]).DisplayMember = "name";26
((ComboBox)this.Controls.Find("cbSelect" + i, true)[0]).ValueMember = "key";27
//用copy解决联动问题28
((ComboBox)this.Controls.Find("cbSelect" + i, true)[0]).DataSource = dt.Copy();29
}31
}34
}35
catch (Exception ex)36
{37
MessageBox.Show(ex.Message);38
}42
}
按查询条件设置显示模式:
1
private
void
SetFilterCondition(
ref
ComboBox conditionselect)
2
{
3 try
4 {
5 for (int i = 0; i < this.fpl.Controls.Count; i++)
6 {
7 if (conditionselect.Name == "cbSelect" + i.ToString())
8 {
9 if (conditionselect.Text == "时间")
10 {
11 if (this.Controls.Find("fplFilter" + i, true).Length > 0)
12 this.Controls.Find("fplFilter" + i, true)[0].Visible = true;
13 if (this.Controls.Find("txtFilter" + i, true).Length > 0)
14 this.Controls.Find("txtFilter" + i, true)[0].Visible = false;
15 if (this.Controls.Find("cbFilter" + i, true).Length > 0)
16 this.Controls.Find("cbFilter" + i, true)[0].Visible = false;
17 }
18 else if (conditionselect.Text == "供应商名称")//在通用中需要修改或添加
19 {
20 if (this.Controls.Find("fplFilter" + i, true).Length > 0)
21 this.Controls.Find("fplFilter" + i, true)[0].Visible = false;
22 if (this.Controls.Find("txtFilter" + i, true).Length > 0)
23 this.Controls.Find("txtFilter" + i, true)[0].Visible = false;
24 if (this.Controls.Find("cbFilter" + i, true).Length > 0)
25 this.Controls.Find("cbFilter" + i, true)[0].Visible = true;
26 }
27 else
28 {
29 if (this.Controls.Find("fplFilter" + i, true).Length > 0)
30 this.Controls.Find("fplFilter" + i, true)[0].Visible = false;
31 if (this.Controls.Find("txtFilter" + i, true).Length > 0)
32 this.Controls.Find("txtFilter" + i, true)[0].Visible = true;
33 if (this.Controls.Find("cbFilter" + i, true).Length > 0)
34 this.Controls.Find("cbFilter" + i, true)[0].Visible = false;
36 }
40 }
41 }
42 }
43 catch (Exception ex)
44 {
45 MessageBox.Show(ex.Message);
46 }
47 }
private
void
SetFilterCondition(
ref
ComboBox conditionselect)2
{3
try4
{5
for (int i = 0; i < this.fpl.Controls.Count; i++)6
{7
if (conditionselect.Name == "cbSelect" + i.ToString())8
{9
if (conditionselect.Text == "时间")10
{11
if (this.Controls.Find("fplFilter" + i, true).Length > 0)12
this.Controls.Find("fplFilter" + i, true)[0].Visible = true;13
if (this.Controls.Find("txtFilter" + i, true).Length > 0)14
this.Controls.Find("txtFilter" + i, true)[0].Visible = false;15
if (this.Controls.Find("cbFilter" + i, true).Length > 0)16
this.Controls.Find("cbFilter" + i, true)[0].Visible = false;17
}18
else if (conditionselect.Text == "供应商名称")//在通用中需要修改或添加19
{20
if (this.Controls.Find("fplFilter" + i, true).Length > 0)21
this.Controls.Find("fplFilter" + i, true)[0].Visible = false;22
if (this.Controls.Find("txtFilter" + i, true).Length > 0)23
this.Controls.Find("txtFilter" + i, true)[0].Visible = false;24
if (this.Controls.Find("cbFilter" + i, true).Length > 0)25
this.Controls.Find("cbFilter" + i, true)[0].Visible = true;26
}27
else28
{29
if (this.Controls.Find("fplFilter" + i, true).Length > 0)30
this.Controls.Find("fplFilter" + i, true)[0].Visible = false;31
if (this.Controls.Find("txtFilter" + i, true).Length > 0)32
this.Controls.Find("txtFilter" + i, true)[0].Visible = true;33
if (this.Controls.Find("cbFilter" + i, true).Length > 0)34
this.Controls.Find("cbFilter" + i, true)[0].Visible = false;36
}40
}41
}42
}43
catch (Exception ex)44
{45
MessageBox.Show(ex.Message);46
}47
}
添加条件
1
2
private
void
AddFilter()
3
{
4 try
5 {
6 for (int i = 0; i < this.fpl.Controls.Count; i++)
7 {
8
可替换代码
16 if (this.Controls.Find("fpl" + i, true).Length > 0)
17 {
18 if (this.Controls.Find("fpl" + i, true)[0].Visible == false)
19 {
20 this.Controls.Find("fpl" + i, true)[0].Visible = true;
21 break;
22 }
23 }
25 }
26 }
27 catch (Exception ex)
28 {
29 MessageBox.Show(ex.Message);
30 }
31 }
2
private
void
AddFilter()3
{4
try5
{6
for (int i = 0; i < this.fpl.Controls.Count; i++)7
{8
可替换代码16
if (this.Controls.Find("fpl" + i, true).Length > 0)17
{18
if (this.Controls.Find("fpl" + i, true)[0].Visible == false)19
{20
this.Controls.Find("fpl" + i, true)[0].Visible = true;21
break;22
}23
}25
}26
}27
catch (Exception ex)28
{29
MessageBox.Show(ex.Message);30
}31
}
提取sql语句
1
private
string
BuildSQL()
2
{
3 try
4 {
6 StringBuilder sb = new StringBuilder();
7 //需要的时候修改表明 得到通用
8 sb.Append("select * from InStoreBill_View ");
9 //用于判断是否是第一条数据 用于添加where的判断
10 int isFirst = 0;
11 for (int i = 0; i < this.fpl.Controls.Count; i++)
12 {
13 生成sql语句
75 }
76 return sb.ToString();
77 }
78 catch (Exception ex)
79 {
80 MessageBox.Show(ex.Message);
81 return "";
82 }
84 }
private
string
BuildSQL()2
{3
try4
{6
StringBuilder sb = new StringBuilder();7
//需要的时候修改表明 得到通用8
sb.Append("select * from InStoreBill_View ");9
//用于判断是否是第一条数据 用于添加where的判断10
int isFirst = 0;11
for (int i = 0; i < this.fpl.Controls.Count; i++)12
{13
生成sql语句75
}76
return sb.ToString();77
}78
catch (Exception ex)79
{80
MessageBox.Show(ex.Message);81
return "";82
}84
}
注: 在设计过程中觉得最烦乱得是布局的设计 ,也许是不太熟练,浪费了很多的时间,好在通用或之际copy就ok了
供下载的源文件链接 ： 多条件动态查询通用模板下载