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- 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- 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" />

合乎自然而生生不息。。。
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原文地址：https://www.cnblogs.com/samwu/p/1789332.html