业务逻辑>数据层>SqlDataSource>sql的输入参数>控件参数>System.Web.UI.WebControls.GridView.SelectedValue

前台代码

  1  <% @ Page Language = " C# "  AutoEventWireup = " true "  CodeBehind = " CH7_DemoForm008.aspx.cs "   %>
  2 
  3  <! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >
  4 
  5  < html  xmlns ="http://www.w3.org/1999/xhtml" >
  6  < head  id ="Head1"  runat ="server" >
  7       < title > 示范使用 GridView 控件作为参数的控件源 </ title >
  8  </ head >
  9  < body >
 10       < form  id ="form1"  runat ="server" >
 11       < div  style ="text-align: center" >
 12           < a  target ="_blank"  href ="http://www.cnblogs.com/liminzhang" >
 13               < img  style ="border: 0;"  alt =""  src ="Images/CH7_DemoForm008_Banner.jpg"  
 14              title ="前往章立民研究室"   /></ a >
 15           < hr  />
 16           < asp:GridView  ID ="GridView1"  runat ="server"  AllowPaging ="True"  AllowSorting ="True"
 17              AutoGenerateColumns ="False"  BackColor ="White"  BorderColor ="#E7E7FF"  BorderStyle ="None"
 18              BorderWidth ="1px"  CellPadding ="3"  DataKeyNames ="订单号码,客户编号"  DataSourceID ="SqlDataSource1"
 19              GridLines ="Horizontal"  PageSize ="5"  SelectedIndex ="0"  Width ="473px" >
 20               < FooterStyle  BackColor ="#B5C7DE"  ForeColor ="#4A3C8C"   />
 21               < RowStyle  BackColor ="#E7E7FF"  ForeColor ="#4A3C8C"   />
 22               < Columns >
 23                   < asp:CommandField  ShowSelectButton ="True"   />
 24                   < asp:BoundField  DataField ="客户编号"  HeaderText ="客户编号"  ReadOnly ="True"  SortExpression ="客户编号"   />
 25                   < asp:BoundField  DataField ="公司名称"  HeaderText ="公司名称"  SortExpression ="公司名称"   />
 26                   < asp:BoundField  DataField ="订单号码"  HeaderText ="订单号码"  InsertVisible ="False"  ReadOnly ="True"
 27                      SortExpression ="订单号码"   />
 28                   < asp:BoundField  DataField ="订单日期"  DataFormatString ="{0:d}"  HeaderText ="订单日期"  SortExpression ="订单日期"   />
 29               </ Columns >
 30               < PagerStyle  BackColor ="#E7E7FF"  ForeColor ="#4A3C8C"  HorizontalAlign ="Right"   />
 31               < SelectedRowStyle  BackColor ="#738A9C"  Font-Bold ="True"  ForeColor ="#F7F7F7"   />
 32               < HeaderStyle  BackColor ="#4A3C8C"  Font-Bold ="True"  ForeColor ="#F7F7F7"   />
 33               < AlternatingRowStyle  BackColor ="#F7F7F7"   />
 34           </ asp:GridView >
 35           < asp:SqlDataSource  ID ="SqlDataSource1"  runat ="server"  ConnectionString ="<%$ ConnectionStrings:chtNorthwind %>"
 36              SelectCommand ="SELECT 客户.客户编号, 客户.公司名称, 订货主档.订单号码, 订货主档.订单日期 FROM 客户 INNER JOIN 订货主档 ON 客户.客户编号 = 订货主档.客户编号 ORDER BY 客户.客户编号, 订货主档.订单号码" >
 37           </ asp:SqlDataSource >
 38           < hr  />
 39           < asp:ListView  ID ="ListView1"  runat ="server"  DataKeyNames ="产品编号,订单号码"  DataSourceID ="SqlDataSource2" >
 40               < AlternatingItemTemplate >
 41                   < tr  style ="background-color: #FFFFFF; color: #284775;" >
 42                       < td >
 43                           < asp:Label  ID ="折扣Label"  runat ="server"  Text ='<%#  Eval("折扣") % > ' />
 44                       </ td >
 45                       < td >
 46                           < asp:Label  ID ="数量Label"  runat ="server"  Text ='<%#  Eval("数量") % > ' />
 47                       </ td >
 48                       < td >
 49                           < asp:Label  ID ="单价Label"  runat ="server"  Text ='<%#  Eval("单价") % > ' />
 50                       </ td >
 51                       < td >
 52                           < asp:Label  ID ="产品编号Label"  runat ="server"  Text ='<%#  Eval("产品编号") % > ' />
 53                       </ td >
 54                       < td >
 55                           < asp:Label  ID ="订单号码Label"  runat ="server"  Text ='<%#  Eval("订单号码") % > ' />
 56                       </ td >
 57                       < td >
 58                           < asp:Label  ID ="订购金额Label"  runat ="server"  Text ='<%#  Eval("订购金额") % > ' />
 59                       </ td >
 60                   </ tr >
 61               </ AlternatingItemTemplate >
 62               < LayoutTemplate >
 63                   < table  id ="Table1"  runat ="server" >
 64                       < tr  id ="Tr1"  runat ="server" >
 65                           < td  id ="Td1"  runat ="server" >
 66                               < table  id ="itemPlaceholderContainer"  runat ="server"  border ="1"  style ="background-color: #FFFFFF;
 67                                  border-collapse: collapse; border-color: #999999; border-style: none; border-width: 1px;
 68                                  font-family: Verdana, Arial, Helvetica, sans-serif;" >
 69                                   < tr  id ="Tr2"  runat ="server"  style ="background-color: #E0FFFF; color: #333333;" >
 70                                       < th  id ="Th1"  runat ="server" >
 71                                          折扣
 72                                       </ th >
 73                                       < th  id ="Th2"  runat ="server" >
 74                                          数量
 75                                       </ th >
 76                                       < th  id ="Th3"  runat ="server" >
 77                                          单价
 78                                       </ th >
 79                                       < th  id ="Th4"  runat ="server" >
 80                                          产品编号
 81                                       </ th >
 82                                       < th  id ="Th5"  runat ="server" >
 83                                          订单号码
 84                                       </ th >
 85                                       < th  id ="Th6"  runat ="server" >
 86                                          订购金额
 87                                       </ th >
 88                                   </ tr >
 89                                   < tr  id ="itemPlaceholder"  runat ="server" >
 90                                   </ tr >
 91                               </ table >
 92                           </ td >
 93                       </ tr >
 94                       < tr  id ="Tr3"  runat ="server" >
 95                           < td  id ="Td2"  runat ="server"  style ="text-align: center; background-color: #5D7B9D; font-family: Verdana, Arial, Helvetica, sans-serif;
 96                              color: #FFFFFF" >
 97                           </ td >
 98                       </ tr >
 99                   </ table >
100               </ LayoutTemplate >
101               < InsertItemTemplate >
102                   < tr  style ="" >
103                       < td >
104                           < asp:Button  ID ="InsertButton"  runat ="server"  CommandName ="Insert"  Text ="插入"   />
105                           < asp:Button  ID ="CancelButton"  runat ="server"  CommandName ="Cancel"  Text ="清除"   />
106                       </ td >
107                       < td >
108                           < asp:TextBox  ID ="折扣TextBox"  runat ="server"  Text ='<%#  Bind("折扣") % > ' />
109                       </ td >
110                       < td >
111                           < asp:TextBox  ID ="数量TextBox"  runat ="server"  Text ='<%#  Bind("数量") % > ' />
112                       </ td >
113                       < td >
114                           < asp:TextBox  ID ="单价TextBox"  runat ="server"  Text ='<%#  Bind("单价") % > ' />
115                       </ td >
116                       < td >
117                           < asp:TextBox  ID ="产品编号TextBox"  runat ="server"  Text ='<%#  Bind("产品编号") % > ' />
118                       </ td >
119                       < td >
120                           < asp:TextBox  ID ="订单号码TextBox"  runat ="server"  Text ='<%#  Bind("订单号码") % > ' />
121                       </ td >
122                       < td >
123                           < asp:TextBox  ID ="订购金额TextBox"  runat ="server"  Text ='<%#  Bind("订购金额") % > ' />
124                       </ td >
125                   </ tr >
126               </ InsertItemTemplate >
127               < SelectedItemTemplate >
128                   < tr  style ="background-color: #E2DED6; font-weight: bold; color: #333333;" >
129                       < td >
130                           < asp:Label  ID ="折扣Label"  runat ="server"  Text ='<%#  Eval("折扣") % > ' />
131                       </ td >
132                       < td >
133                           < asp:Label  ID ="数量Label"  runat ="server"  Text ='<%#  Eval("数量") % > ' />
134                       </ td >
135                       < td >
136                           < asp:Label  ID ="单价Label"  runat ="server"  Text ='<%#  Eval("单价") % > ' />
137                       </ td >
138                       < td >
139                           < asp:Label  ID ="产品编号Label"  runat ="server"  Text ='<%#  Eval("产品编号") % > ' />
140                       </ td >
141                       < td >
142                           < asp:Label  ID ="订单号码Label"  runat ="server"  Text ='<%#  Eval("订单号码") % > ' />
143                       </ td >
144                       < td >
145                           < asp:Label  ID ="订购金额Label"  runat ="server"  Text ='<%#  Eval("订购金额") % > ' />
146                       </ td >
147                   </ tr >
148               </ SelectedItemTemplate >
149               < EmptyDataTemplate >
150                   < table  id ="Table2"  runat ="server"  style ="background-color: #FFFFFF; border-collapse: collapse;
151                      border-color: #999999; border-style: none; border-width: 1px;" >
152                       < tr >
153                           < td >
154                              未传回资料。
155                           </ td >
156                       </ tr >
157                   </ table >
158               </ EmptyDataTemplate >
159               < EditItemTemplate >
160                   < tr  style ="background-color: #999999;" >
161                       < td >
162                           < asp:Button  ID ="UpdateButton"  runat ="server"  CommandName ="Update"  Text ="更新"   />
163                           < asp:Button  ID ="CancelButton"  runat ="server"  CommandName ="Cancel"  Text ="取消"   />
164                       </ td >
165                       < td >
166                           < asp:TextBox  ID ="折扣TextBox"  runat ="server"  Text ='<%#  Bind("折扣") % > ' />
167                       </ td >
168                       < td >
169                           < asp:TextBox  ID ="数量TextBox"  runat ="server"  Text ='<%#  Bind("数量") % > ' />
170                       </ td >
171                       < td >
172                           < asp:TextBox  ID ="单价TextBox"  runat ="server"  Text ='<%#  Bind("单价") % > ' />
173                       </ td >
174                       < td >
175                           < asp:Label  ID ="产品编号Label1"  runat ="server"  Text ='<%#  Eval("产品编号") % > ' />
176                       </ td >
177                       < td >
178                           < asp:Label  ID ="订单号码Label1"  runat ="server"  Text ='<%#  Eval("订单号码") % > ' />
179                       </ td >
180                       < td >
181                           < asp:TextBox  ID ="订购金额TextBox"  runat ="server"  Text ='<%#  Bind("订购金额") % > ' />
182                       </ td >
183                   </ tr >
184               </ EditItemTemplate >
185               < ItemTemplate >
186                   < tr  style ="background-color: #E0FFFF; color: #333333;" >
187                       < td >
188                           < asp:Label  ID ="折扣Label"  runat ="server"  Text ='<%#  Eval("折扣") % > ' />
189                       </ td >
190                       < td >
191                           < asp:Label  ID ="数量Label"  runat ="server"  Text ='<%#  Eval("数量") % > ' />
192                       </ td >
193                       < td >
194                           < asp:Label  ID ="单价Label"  runat ="server"  Text ='<%#  Eval("单价") % > ' />
195                       </ td >
196                       < td >
197                           < asp:Label  ID ="产品编号Label"  runat ="server"  Text ='<%#  Eval("产品编号") % > ' />
198                       </ td >
199                       < td >
200                           < asp:Label  ID ="订单号码Label"  runat ="server"  Text ='<%#  Eval("订单号码") % > ' />
201                       </ td >
202                       < td >
203                           < asp:Label  ID ="订购金额Label"  runat ="server"  Text ='<%#  Eval("订购金额") % > ' />
204                       </ td >
205                   </ tr >
206               </ ItemTemplate >
207           </ asp:ListView >
208           < asp:SqlDataSource  ID ="SqlDataSource2"  runat ="server"  ConnectionString ="<%$ ConnectionStrings:chtNorthwind %>"
209              SelectCommand ="SELECT 折扣, 数量, 单价, 产品编号, 订单号码, (单价 * 数量) * (1 - 折扣) AS 订购金额 FROM 订货明细 WHERE (订单号码 = @订单号码)" >
210               < SelectParameters >
211                   < asp:ControlParameter  ControlID ="GridView1"  Name ="订单号码"  PropertyName ="SelectedValue"
212                      Type ="Int32"   />
213               </ SelectParameters >
214           </ asp:SqlDataSource >
215           < hr  />
216       </ div >
217       </ form >
218  </ body >
219  </ html >
220 
221 

 请摒弃样式的研究，语法的限制，专注于控件函数的观点。

那便是：

读取数据(sql语句)

{

 　　sql语句(输入参数);

}

输入参数便是，

 <asp:ControlParameter ControlID="GridView1" Name="订单号码" PropertyName="SelectedValue" Type="Int32" />