上次简单介绍了下CodeSmith,今天做些详细介绍(转),希望可以对大家有帮助:
CodeSmith 是一种语法类似于asp.net的基于模板的代码生成器,程序可以自定义模板,从而减少重复编码的劳动量,提高效率。
安装CodeSmith 2.6注册后发现有两个可运行程序CodeSmith Studio.exe和CodeSmith Explorer.exe
CodeSmith Studio.exe用来创建自定义模板
CodeSmith Explorer.exe用来导入模板并且生成代码
打开 CodeSmith Studio.exe,新建一个C#模板。发现有如下类似与asp.net的标识符号
<% %>
<%= %>
<%@ %>
<script runat="template"> </script>
下面通过简单的例子说明如何用CodeSmith创建模板并生成代码
新建一个空的txt文件,在文件上部输入如下一个CodeTemplate指示,Language和TargetLanguage分别代表模板语言和创建代码语言,
<%
@CodeTemplateLanguage
=
"
C#
"
TargetLanguage
=
"
C#
"
Description
=
"
Generatesasimpleclass
"
%>
然后声明几个变量,用来为了能够在以后生成的代码嵌入,这里声明了三个名为NameSpace,ClassName,Contxt的变量。其他参数一目了然就不再说明了,
<%
@PropertyName
=
"
NameSpace
"
Type
=
"
String
"
Category
=
"
Context
"
Description
=
"
Thenamespacetouseforthisclass
"
%>
<%
@PropertyName
=
"
ClassName
"
Type
=
"
String
"
Category
=
"
Context
"
Description
=
"
Thenameoftheclasstogenerate
"
%>
<%
@PropertyName
=
"
DevelopersName
"
Type
=
"
String
"
Category
=
"
Context
"
Description
=
"
Thenametoincludeinthecommentheader
"
%>
接下来建立将要生成代码的框架,在适当位置引用刚刚声明的变量名
using
System;
namespace
<%=
NameSpace
%>
{
///<summary>
///Summarydescriptionfor<%=ClassName%>.
///</summary>
publicclass<%=ClassName%>
{
public<%=ClassName%>()
{
}
}
}
最后,打开CodeSmith Explorer.exe,加载此模板,并且在属性对话框中任意更改声明的变量名,按Generate按钮生成合适的代码
以上简单的说明了CodeSmith的功能
下面看看在数据库访问中它是如何最小化我们的工作的
在这里我们要用到CodeSmith API中一个叫SchemaExplorer的组件,它提供了一系列类来操作数据库的框架,我们可以用它来创建表和存储过程,得到字段类型,字段名等。
如下是更新NorthWind数据库中orders表记录的存储过程,我们来看看如何自动生成它
CREATEPROCEDUREdbo.UpdateOrders
@OrderID
int
,
@CustomerIDnchar(
5
),
@EmployeeID
int
,
@OrderDatedatetime,
@RequiredDatedatetime,
@ShippedDatedatetime,
@ShipVia
int
,
@Freightmoney,
@ShipNamenvarchar(
40
),
@ShipAddressnvarchar(
60
),
@ShipCitynvarchar(
15
),
@ShipRegionnvarchar(
15
),
@ShipPostalCodenvarchar(
10
),
@ShipCountrynvarchar(
15
)
AS
UPDATE[Orders]SET
[CustomerID]
=
@CustomerID,
[EmployeeID]
=
@EmployeeID,
[OrderDate]
=
@OrderDate,
[RequiredDate]
=
@RequiredDate,
[ShippedDate]
=
@ShippedDate,
[ShipVia]
=
@ShipVia,
[Freight]
=
@Freight,
[ShipName]
=
@ShipName,
[ShipAddress]
=
@ShipAddress,
[ShipCity]
=
@ShipCity,
[ShipRegion]
=
@ShipRegion,
[ShipPostalCode]
=
@ShipPostalCode,
[ShipCountry]
=
@ShipCountry
WHERE
[OrderID]
=
@OrderID
第一步还是创建一个CodeTemplate指示,注意TargetLanguage属性改为了T-SQL,因为创建的SQL语言代码
<%
@CodeTemplateLanguage
=
"
C#
"
TargetLanguage
=
"
T-SQL
"
Description
=
"
Generatesaupdatestoredprocedure.
"
%>
然后加载SchemaExplorer组件,并导入SchemaExplorer命名空间,看这里是不是和asp.net很像
<%
@AssemblyName
=
"
SchemaExplorer
"
%>
<%
@ImportNamespace
=
"
SchemaExplorer
"
%>
接下来声明变量,因为要从数据库表中读取框架所以 Type 属性为SchemaExplorer.TableSchema
<%
@Property Name
=
"
SourceTable
"
Type
=
"
SchemaExplorer.TableSchema
"
Category
=
"
Context
"
Description
=
"
Tablethatthestoredproceduresshouldbebasedon.
"
%>
下面就要写实际将要输出代码部分的模板了。
先写存储过程的第一行 ,<%%>内为引用前面声明变量名,代表表名
CREATEPROCEDUREdbo.Update
<%=
SourceTable.Name
%>
第二步为存储过程创造将要声明的参数列表
//
开始循环遍历每列
<%
for
(
int
i
=
0
;i
<
SourceTable.Columns.Count;i
++
)
{%>
//传递每列给GetSqlParameterStatement函数
<%=GetSqlParameterStatement(SourceTable.Columns[i])%>
//循环结束条件
<%if(i<SourceTable.Columns.Count-1){%>,<%}%>
<%}
%
>
AS
定义GetSqlParameterStatement方法接受列参数返回参数名,和字段类型,注意函数要放在
<script runat="template"></script>里
<
scriptrunat
=
"
template
"
>
public
string
GetSqlParameterStatement(ColumnSchemacolumn)
{
stringparam="@"+column.Name+""+column.NativeType;
switch(column.DataType)
{
caseDbType.Decimal:
{
param+="("+column.Precision+","+column.Scale+")";
break;
}
default:
{
if(column.Size>0)
{
param+="("+column.Size+")";
}
break;
}
}
returnparam;
}
</
script
>
接下来创建存储过程的Update部分,语法类似不再说明
UPDATE[
<%=
SourceTable.Name
%>
]SET
<%
for
(
int
i
=
0
;i
<
SourceTable.NonPrimaryKeyColumns.Count;i
++
)
{%>
[<%=SourceTable.NonPrimaryKeyColumns[i].Name%>]=@<%=SourceTable.NonPrimaryKeyColumns[i].Name%><%if(i<SourceTable.NonPrimaryKeyColumns.Count-1){%>,<%}%>
<%}
%>
//
where条件,注意主键提取方法
WHERE
<%
for
(
int
i
=
0
;i
<
SourceTable.PrimaryKey.MemberColumns.Count;i
++
)
{%>
<%if(i>0){%>AND<%}%>
[<%=SourceTable.PrimaryKey.MemberColumns[i].Name%>]=@<%=SourceTable.PrimaryKey.MemberColumns[i].Name%>
<%}
%>
最终为模板为如下形式
<%
@CodeTemplateLanguage
=
"
C#
"
TargetLanguage
=
"
T-SQL
"
Description
=
"
Generatesaupdatestoredprocedure.
"
%>
<%
@PropertyName
=
"
SourceTable
"
Type
=
"
SchemaExplorer.TableSchema
"
Category
=
"
Context
"
Description
=
"
Tablethatthestoredproceduresshouldbebasedon.
"
%>
<%
@AssemblyName
=
"
SchemaExplorer
"
%>
<%
@ImportNamespace
=
"
SchemaExplorer
"
%>
<
scriptrunat
=
"
template
"
>
public
string
GetSqlParameterStatement(ColumnSchemacolumn)
{
string
param
=
"
@
"
+
column.Name
+
"
"
+
column.NativeType;
switch
(column.DataType)
{
case
DbType.Decimal:
{
param
+=
"
(
"
+
column.Precision
+
"
,
"
+
column.Scale
+
"
)
"
;
break
;
}
default
:
{
if
(column.Size
>
0
)
{
param
+=
"
(
"
+
column.Size
+
"
)
"
;
}
break
;
}
}
return
param;
}
</
script
>
CREATEPROCEDUREdbo.Update
<%=
SourceTable.Name
%>
<%
for
(
int
i
=
0
;i
<
SourceTable.Columns.Count;i
++
){
%>
<%=
GetSqlParameterStatement(SourceTable.Columns[i])
%><%
if
(i
<
SourceTable.Columns.Count
-
1
){
%>
,
<%
}
%>
<%
}
%>
AS
UPDATE[
<%=
SourceTable.Name
%>
]SET
<%
for
(
int
i
=
0
;i
<
SourceTable.NonPrimaryKeyColumns.Count;i
++
){
%>
[
<%=
SourceTable.NonPrimaryKeyColumns[i].Name
%>
]
=
@
<%=
SourceTable.NonPrimaryKeyColumns[i].Name
%><%
if
(i
<
SourceTable.NonPrimaryKeyColumns.Count
-
1
){
%>
,
<%
}
%>
<%
}
%>
WHERE
<%
for
(
int
i
=
0
;i
<
SourceTable.PrimaryKey.MemberColumns.Count;i
++
){
%>
<%
if
(i
>
0
){
%>
AND
<%
}
%>
[
<%=
SourceTable.PrimaryKey.MemberColumns[i].Name
%>
]
=
@
<%=
SourceTable.PrimaryKey.MemberColumns[i].Name
%>
<%
}
%>
将其用CodeSmith Explorer.exe打开
可以任意选择数据库中的表,这里选择NorthWind中的0rders表
然后生成代码,就创建好了存储过程
CREATEPROCEDUREdbo.UpdateOrders
@OrderID
int
,
@CustomerIDnchar(
5
),
@EmployeeID
int
,
@OrderDatedatetime,
@RequiredDatedatetime,
@ShippedDatedatetime,
@ShipVia
int
,
@Freightmoney,
@ShipNamenvarchar(
40
),
@ShipAddressnvarchar(
60
),
@ShipCitynvarchar(
15
),
@ShipRegionnvarchar(
15
),
@ShipPostalCodenvarchar(
10
),
@ShipCountrynvarchar(
15
)
AS
UPDATE[Orders]SET
[CustomerID]
=
@CustomerID,
[EmployeeID]
=
@EmployeeID,
[OrderDate]
=
@OrderDate,
[RequiredDate]
=
@RequiredDate,
[ShippedDate]
=
@ShippedDate,
[ShipVia]
=
@ShipVia,
[Freight]
=
@Freight,
[ShipName]
=
@ShipName,
[ShipAddress]
=
@ShipAddress,
[ShipCity]
=
@ShipCity,
[ShipRegion]
=
@ShipRegion,
[ShipPostalCode]
=
@ShipPostalCode,
[ShipCountry]
=
@ShipCountry
WHERE
[OrderID]
=
@OrderID
同样,我们可以选择其他的表创建Updata存储过程,也可以自定义其他诸如insert delete等的存储过程,是不是很方便?^-^
以上只是CodeSmith的简单应用,还有其他的功能有待大家探索了。
关于CodeSmith社区一些模板资源,大家可以去如下地址选择下载
CodeSmith Peer Support Forum
Codesmith templates library
<
scriptrunat
=
"
template
"
>
public
string
GetSqlParameterStatement(ColumnSchemacolumn)
{
stringparam="@"+column.Name+""+column.NativeType;
switch(column.DataType)
{
caseDbType.Decimal:
{
param+="("+column.Precision+","+column.Scale+")";
break;
}
default:
{
if(column.Size>0)
{
param+="("+column.Size+")";
}
break;
}
}
returnparam;
}
</
script
>
接下来创建存储过程的Update部分,语法类似不再说明
UPDATE[
<%=
SourceTable.Name
%>
]SET
<%
for
(
int
i
=
0
;i
<
SourceTable.NonPrimaryKeyColumns.Count;i
++
)
{%>
[<%=SourceTable.NonPrimaryKeyColumns[i].Name%>]=@<%=SourceTable.NonPrimaryKeyColumns[i].Name%><%if(i<SourceTable.NonPrimaryKeyColumns.Count-1){%>,<%}%>
<%}
%>
//
where条件,注意主键提取方法
WHERE
<%
for
(
int
i
=
0
;i
<
SourceTable.PrimaryKey.MemberColumns.Count;i
++
)
{%>
<%if(i>0){%>AND<%}%>
[<%=SourceTable.PrimaryKey.MemberColumns[i].Name%>]=@<%=SourceTable.PrimaryKey.MemberColumns[i].Name%>
<%}
%>
最终为模板为如下形式
<%
@CodeTemplateLanguage
=
"
C#
"
TargetLanguage
=
"
T-SQL
"
Description
=
"
Generatesaupdatestoredprocedure.
"
%>
<%
@PropertyName
=
"
SourceTable
"
Type
=
"
SchemaExplorer.TableSchema
"
Category
=
"
Context
"
Description
=
"
Tablethatthestoredproceduresshouldbebasedon.
"
%>
<%
@AssemblyName
=
"
SchemaExplorer
"
%>
<%
@ImportNamespace
=
"
SchemaExplorer
"
%>
<
scriptrunat
=
"
template
"
>
public
string
GetSqlParameterStatement(ColumnSchemacolumn)
{
string
param
=
"
@
"
+
column.Name
+
"
"
+
column.NativeType;
switch
(column.DataType)
{
case
DbType.Decimal:
{
param
+=
"
(
"
+
column.Precision
+
"
,
"
+
column.Scale
+
"
)
"
;
break
;
}
default
:
{
if
(column.Size
>
0
)
{
param
+=
"
(
"
+
column.Size
+
"
)
"
;
}
break
;
}
}
return
param;
}
</
script
>
CREATEPROCEDUREdbo.Update
<%=
SourceTable.Name
%>
<%
for
(
int
i
=
0
;i
<
SourceTable.Columns.Count;i
++
){
%>
<%=
GetSqlParameterStatement(SourceTable.Columns[i])
%><%
if
(i
<
SourceTable.Columns.Count
-
1
){
%>
,
<%
}
%>
<%
}
%>
AS
UPDATE[
<%=
SourceTable.Name
%>
]SET
<%
for
(
int
i
=
0
;i
<
SourceTable.NonPrimaryKeyColumns.Count;i
++
){
%>
[
<%=
SourceTable.NonPrimaryKeyColumns[i].Name
%>
]
=
@
<%=
SourceTable.NonPrimaryKeyColumns[i].Name
%><%
if
(i
<
SourceTable.NonPrimaryKeyColumns.Count
-
1
){
%>
,
<%
}
%>
<%
}
%>
WHERE
<%
for
(
int
i
=
0
;i
<
SourceTable.PrimaryKey.MemberColumns.Count;i
++
){
%>
<%
if
(i
>
0
){
%>
AND
<%
}
%>
[
<%=
SourceTable.PrimaryKey.MemberColumns[i].Name
%>
]
=
@
<%=
SourceTable.PrimaryKey.MemberColumns[i].Name
%>
<%
}
%>
将其用CodeSmith Explorer.exe打开
可以任意选择数据库中的表,这里选择NorthWind中的0rders表
然后生成代码,就创建好了存储过程
CREATEPROCEDUREdbo.UpdateOrders
@OrderID
int
,
@CustomerIDnchar(
5
),
@EmployeeID
int
,
@OrderDatedatetime,
@RequiredDatedatetime,
@ShippedDatedatetime,
@ShipVia
int
,
@Freightmoney,
@ShipNamenvarchar(
40
),
@ShipAddressnvarchar(
60
),
@ShipCitynvarchar(
15
),
@ShipRegionnvarchar(
15
),
@ShipPostalCodenvarchar(
10
),
@ShipCountrynvarchar(
15
)
AS
UPDATE[Orders]SET
[CustomerID]
=
@CustomerID,
[EmployeeID]
=
@EmployeeID,
[OrderDate]
=
@OrderDate,
[RequiredDate]
=
@RequiredDate,
[ShippedDate]
=
@ShippedDate,
[ShipVia]
=
@ShipVia,
[Freight]
=
@Freight,
[ShipName]
=
@ShipName,
[ShipAddress]
=
@ShipAddress,
[ShipCity]
=
@ShipCity,
[ShipRegion]
=
@ShipRegion,
[ShipPostalCode]
=
@ShipPostalCode,
[ShipCountry]
=
@ShipCountry
WHERE
[OrderID]
=
@OrderID
同样,我们可以选择其他的表创建Updata存储过程,也可以自定义其他诸如insert delete等的存储过程,是不是很方便?^-^
以上只是CodeSmith的简单应用,还有其他的功能有待大家探索了。
关于CodeSmith社区一些模板资源,大家可以去如下地址选择下载
CodeSmith Peer Support Forum
Codesmith templates library
<%
@CodeTemplateLanguage
=
"
C#
"
TargetLanguage
=
"
C#
"
Description
=
"
Generatesasimpleclass
"
%>
然后声明几个变量,用来为了能够在以后生成的代码嵌入,这里声明了三个名为NameSpace,ClassName,Contxt的变量。其他参数一目了然就不再说明了,
<%
@PropertyName
=
"
NameSpace
"
Type
=
"
String
"
Category
=
"
Context
"
Description
=
"
Thenamespacetouseforthisclass
"
%>
<%
@PropertyName
=
"
ClassName
"
Type
=
"
String
"
Category
=
"
Context
"
Description
=
"
Thenameoftheclasstogenerate
"
%>
<%
@PropertyName
=
"
DevelopersName
"
Type
=
"
String
"
Category
=
"
Context
"
Description
=
"
Thenametoincludeinthecommentheader
"
%>
接下来建立将要生成代码的框架,在适当位置引用刚刚声明的变量名
using
System;
namespace
<%=
NameSpace
%>
{
///<summary>
///Summarydescriptionfor<%=ClassName%>.
///</summary>
publicclass<%=ClassName%>
{
public<%=ClassName%>()
{
}
}
}
最后,打开CodeSmith Explorer.exe,加载此模板,并且在属性对话框中任意更改声明的变量名,按Generate按钮生成合适的代码
以上简单的说明了CodeSmith的功能
下面看看在数据库访问中它是如何最小化我们的工作的
在这里我们要用到CodeSmith API中一个叫SchemaExplorer的组件,它提供了一系列类来操作数据库的框架,我们可以用它来创建表和存储过程,得到字段类型,字段名等。
如下是更新NorthWind数据库中orders表记录的存储过程,我们来看看如何自动生成它
CREATEPROCEDUREdbo.UpdateOrders
@OrderID
int
,
@CustomerIDnchar(
5
),
@EmployeeID
int
,
@OrderDatedatetime,
@RequiredDatedatetime,
@ShippedDatedatetime,
@ShipVia
int
,
@Freightmoney,
@ShipNamenvarchar(
40
),
@ShipAddressnvarchar(
60
),
@ShipCitynvarchar(
15
),
@ShipRegionnvarchar(
15
),
@ShipPostalCodenvarchar(
10
),
@ShipCountrynvarchar(
15
)
AS
UPDATE[Orders]SET
[CustomerID]
=
@CustomerID,
[EmployeeID]
=
@EmployeeID,
[OrderDate]
=
@OrderDate,
[RequiredDate]
=
@RequiredDate,
[ShippedDate]
=
@ShippedDate,
[ShipVia]
=
@ShipVia,
[Freight]
=
@Freight,
[ShipName]
=
@ShipName,
[ShipAddress]
=
@ShipAddress,
[ShipCity]
=
@ShipCity,
[ShipRegion]
=
@ShipRegion,
[ShipPostalCode]
=
@ShipPostalCode,
[ShipCountry]
=
@ShipCountry
WHERE
[OrderID]
=
@OrderID
第一步还是创建一个CodeTemplate指示,注意TargetLanguage属性改为了T-SQL,因为创建的SQL语言代码
<%
@CodeTemplateLanguage
=
"
C#
"
TargetLanguage
=
"
T-SQL
"
Description
=
"
Generatesaupdatestoredprocedure.
"
%>
然后加载SchemaExplorer组件,并导入SchemaExplorer命名空间,看这里是不是和asp.net很像
<%
@AssemblyName
=
"
SchemaExplorer
"
%>
<%
@ImportNamespace
=
"
SchemaExplorer
"
%>
接下来声明变量,因为要从数据库表中读取框架所以 Type 属性为SchemaExplorer.TableSchema
<%
@Property Name
=
"
SourceTable
"
Type
=
"
SchemaExplorer.TableSchema
"
Category
=
"
Context
"
Description
=
"
Tablethatthestoredproceduresshouldbebasedon.
"
%>
下面就要写实际将要输出代码部分的模板了。
先写存储过程的第一行 ,<%%>内为引用前面声明变量名,代表表名
CREATEPROCEDUREdbo.Update
<%=
SourceTable.Name
%>
第二步为存储过程创造将要声明的参数列表
//
开始循环遍历每列
<%
for
(
int
i
=
0
;i
<
SourceTable.Columns.Count;i
++
)
{%>
//传递每列给GetSqlParameterStatement函数
<%=GetSqlParameterStatement(SourceTable.Columns[i])%>
//循环结束条件
<%if(i<SourceTable.Columns.Count-1){%>,<%}%>
<%}
%
>
AS
定义GetSqlParameterStatement方法接受列参数返回参数名,和字段类型,注意函数要放在
<script runat="template"></script>里
<
scriptrunat
=
"
template
"
>
public
string
GetSqlParameterStatement(ColumnSchemacolumn)
{
stringparam="@"+column.Name+""+column.NativeType;
switch(column.DataType)
{
caseDbType.Decimal:
{
param+="("+column.Precision+","+column.Scale+")";
break;
}
default:
{
if(column.Size>0)
{
param+="("+column.Size+")";
}
break;
}
}
returnparam;
}
</
script
>
接下来创建存储过程的Update部分,语法类似不再说明
UPDATE[
<%=
SourceTable.Name
%>
]SET
<%
for
(
int
i
=
0
;i
<
SourceTable.NonPrimaryKeyColumns.Count;i
++
)
{%>
[<%=SourceTable.NonPrimaryKeyColumns[i].Name%>]=@<%=SourceTable.NonPrimaryKeyColumns[i].Name%><%if(i<SourceTable.NonPrimaryKeyColumns.Count-1){%>,<%}%>
<%}
%>
//
where条件,注意主键提取方法
WHERE
<%
for
(
int
i
=
0
;i
<
SourceTable.PrimaryKey.MemberColumns.Count;i
++
)
{%>
<%if(i>0){%>AND<%}%>
[<%=SourceTable.PrimaryKey.MemberColumns[i].Name%>]=@<%=SourceTable.PrimaryKey.MemberColumns[i].Name%>
<%}
%>
最终为模板为如下形式
<%
@CodeTemplateLanguage
=
"
C#
"
TargetLanguage
=
"
T-SQL
"
Description
=
"
Generatesaupdatestoredprocedure.
"
%>
<%
@PropertyName
=
"
SourceTable
"
Type
=
"
SchemaExplorer.TableSchema
"
Category
=
"
Context
"
Description
=
"
Tablethatthestoredproceduresshouldbebasedon.
"
%>
<%
@AssemblyName
=
"
SchemaExplorer
"
%>
<%
@ImportNamespace
=
"
SchemaExplorer
"
%>
<
scriptrunat
=
"
template
"
>
public
string
GetSqlParameterStatement(ColumnSchemacolumn)
{
string
param
=
"
@
"
+
column.Name
+
"
"
+
column.NativeType;
switch
(column.DataType)
{
case
DbType.Decimal:
{
param
+=
"
(
"
+
column.Precision
+
"
,
"
+
column.Scale
+
"
)
"
;
break
;
}
default
:
{
if
(column.Size
>
0
)
{
param
+=
"
(
"
+
column.Size
+
"
)
"
;
}
break
;
}
}
return
param;
}
</
script
>
CREATEPROCEDUREdbo.Update
<%=
SourceTable.Name
%>
<%
for
(
int
i
=
0
;i
<
SourceTable.Columns.Count;i
++
){
%>
<%=
GetSqlParameterStatement(SourceTable.Columns[i])
%><%
if
(i
<
SourceTable.Columns.Count
-
1
){
%>
,
<%
}
%>
<%
}
%>
AS
UPDATE[
<%=
SourceTable.Name
%>
]SET
<%
for
(
int
i
=
0
;i
<
SourceTable.NonPrimaryKeyColumns.Count;i
++
){
%>
[
<%=
SourceTable.NonPrimaryKeyColumns[i].Name
%>
]
=
@
<%=
SourceTable.NonPrimaryKeyColumns[i].Name
%><%
if
(i
<
SourceTable.NonPrimaryKeyColumns.Count
-
1
){
%>
,
<%
}
%>
<%
}
%>
WHERE
<%
for
(
int
i
=
0
;i
<
SourceTable.PrimaryKey.MemberColumns.Count;i
++
){
%>
<%
if
(i
>
0
){
%>
AND
<%
}
%>
[
<%=
SourceTable.PrimaryKey.MemberColumns[i].Name
%>
]
=
@
<%=
SourceTable.PrimaryKey.MemberColumns[i].Name
%>
<%
}
%>
将其用CodeSmith Explorer.exe打开
可以任意选择数据库中的表,这里选择NorthWind中的0rders表
然后生成代码,就创建好了存储过程
CREATEPROCEDUREdbo.UpdateOrders
@OrderID
int
,
@CustomerIDnchar(
5
),
@EmployeeID
int
,
@OrderDatedatetime,
@RequiredDatedatetime,
@ShippedDatedatetime,
@ShipVia
int
,
@Freightmoney,
@ShipNamenvarchar(
40
),
@ShipAddressnvarchar(
60
),
@ShipCitynvarchar(
15
),
@ShipRegionnvarchar(
15
),
@ShipPostalCodenvarchar(
10
),
@ShipCountrynvarchar(
15
)
AS
UPDATE[Orders]SET
[CustomerID]
=
@CustomerID,
[EmployeeID]
=
@EmployeeID,
[OrderDate]
=
@OrderDate,
[RequiredDate]
=
@RequiredDate,
[ShippedDate]
=
@ShippedDate,
[ShipVia]
=
@ShipVia,
[Freight]
=
@Freight,
[ShipName]
=
@ShipName,
[ShipAddress]
=
@ShipAddress,
[ShipCity]
=
@ShipCity,
[ShipRegion]
=
@ShipRegion,
[ShipPostalCode]
=
@ShipPostalCode,
[ShipCountry]
=
@ShipCountry
WHERE
[OrderID]
=
@OrderID
同样,我们可以选择其他的表创建Updata存储过程,也可以自定义其他诸如insert delete等的存储过程,是不是很方便?^-^
以上只是CodeSmith的简单应用,还有其他的功能有待大家探索了。
关于CodeSmith社区一些模板资源,大家可以去如下地址选择下载
CodeSmith Peer Support Forum
Codesmith templates library
<
scriptrunat
=
"
template
"
>
public
string
GetSqlParameterStatement(ColumnSchemacolumn)
{
stringparam="@"+column.Name+""+column.NativeType;
switch(column.DataType)
{
caseDbType.Decimal:
{
param+="("+column.Precision+","+column.Scale+")";
break;
}
default:
{
if(column.Size>0)
{
param+="("+column.Size+")";
}
break;
}
}
returnparam;
}
</
script
>
接下来创建存储过程的Update部分,语法类似不再说明
UPDATE[
<%=
SourceTable.Name
%>
]SET
<%
for
(
int
i
=
0
;i
<
SourceTable.NonPrimaryKeyColumns.Count;i
++
)
{%>
[<%=SourceTable.NonPrimaryKeyColumns[i].Name%>]=@<%=SourceTable.NonPrimaryKeyColumns[i].Name%><%if(i<SourceTable.NonPrimaryKeyColumns.Count-1){%>,<%}%>
<%}
%>
//
where条件,注意主键提取方法
WHERE
<%
for
(
int
i
=
0
;i
<
SourceTable.PrimaryKey.MemberColumns.Count;i
++
)
{%>
<%if(i>0){%>AND<%}%>
[<%=SourceTable.PrimaryKey.MemberColumns[i].Name%>]=@<%=SourceTable.PrimaryKey.MemberColumns[i].Name%>
<%}
%>
最终为模板为如下形式
<%
@CodeTemplateLanguage
=
"
C#
"
TargetLanguage
=
"
T-SQL
"
Description
=
"
Generatesaupdatestoredprocedure.
"
%>
<%
@PropertyName
=
"
SourceTable
"
Type
=
"
SchemaExplorer.TableSchema
"
Category
=
"
Context
"
Description
=
"
Tablethatthestoredproceduresshouldbebasedon.
"
%>
<%
@AssemblyName
=
"
SchemaExplorer
"
%>
<%
@ImportNamespace
=
"
SchemaExplorer
"
%>
<
scriptrunat
=
"
template
"
>
public
string
GetSqlParameterStatement(ColumnSchemacolumn)
{
string
param
=
"
@
"
+
column.Name
+
"
"
+
column.NativeType;
switch
(column.DataType)
{
case
DbType.Decimal:
{
param
+=
"
(
"
+
column.Precision
+
"
,
"
+
column.Scale
+
"
)
"
;
break
;
}
default
:
{
if
(column.Size
>
0
)
{
param
+=
"
(
"
+
column.Size
+
"
)
"
;
}
break
;
}
}
return
param;
}
</
script
>
CREATEPROCEDUREdbo.Update
<%=
SourceTable.Name
%>
<%
for
(
int
i
=
0
;i
<
SourceTable.Columns.Count;i
++
){
%>
<%=
GetSqlParameterStatement(SourceTable.Columns[i])
%><%
if
(i
<
SourceTable.Columns.Count
-
1
){
%>
,
<%
}
%>
<%
}
%>
AS
UPDATE[
<%=
SourceTable.Name
%>
]SET
<%
for
(
int
i
=
0
;i
<
SourceTable.NonPrimaryKeyColumns.Count;i
++
){
%>
[
<%=
SourceTable.NonPrimaryKeyColumns[i].Name
%>
]
=
@
<%=
SourceTable.NonPrimaryKeyColumns[i].Name
%><%
if
(i
<
SourceTable.NonPrimaryKeyColumns.Count
-
1
){
%>
,
<%
}
%>
<%
}
%>
WHERE
<%
for
(
int
i
=
0
;i
<
SourceTable.PrimaryKey.MemberColumns.Count;i
++
){
%>
<%
if
(i
>
0
){
%>
AND
<%
}
%>
[
<%=
SourceTable.PrimaryKey.MemberColumns[i].Name
%>
]
=
@
<%=
SourceTable.PrimaryKey.MemberColumns[i].Name
%>
<%
}
%>
将其用CodeSmith Explorer.exe打开
可以任意选择数据库中的表,这里选择NorthWind中的0rders表
然后生成代码,就创建好了存储过程
CREATEPROCEDUREdbo.UpdateOrders
@OrderID
int
,
@CustomerIDnchar(
5
),
@EmployeeID
int
,
@OrderDatedatetime,
@RequiredDatedatetime,
@ShippedDatedatetime,
@ShipVia
int
,
@Freightmoney,
@ShipNamenvarchar(
40
),
@ShipAddressnvarchar(
60
),
@ShipCitynvarchar(
15
),
@ShipRegionnvarchar(
15
),
@ShipPostalCodenvarchar(
10
),
@ShipCountrynvarchar(
15
)
AS
UPDATE[Orders]SET
[CustomerID]
=
@CustomerID,
[EmployeeID]
=
@EmployeeID,
[OrderDate]
=
@OrderDate,
[RequiredDate]
=
@RequiredDate,
[ShippedDate]
=
@ShippedDate,
[ShipVia]
=
@ShipVia,
[Freight]
=
@Freight,
[ShipName]
=
@ShipName,
[ShipAddress]
=
@ShipAddress,
[ShipCity]
=
@ShipCity,
[ShipRegion]
=
@ShipRegion,
[ShipPostalCode]
=
@ShipPostalCode,
[ShipCountry]
=
@ShipCountry
WHERE
[OrderID]
=
@OrderID
同样,我们可以选择其他的表创建Updata存储过程,也可以自定义其他诸如insert delete等的存储过程,是不是很方便?^-^
以上只是CodeSmith的简单应用,还有其他的功能有待大家探索了。
关于CodeSmith社区一些模板资源,大家可以去如下地址选择下载
CodeSmith Peer Support Forum
Codesmith templates library