Question

我想按下拉列表值进行搜索。我在这个实例中使用ControlParameters，并希望通过用户选择的下拉列表进行搜索。是否可以使用ControlParameters？我把错误放在下面，但我得到的错误是

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" >
    <head id="Head1" runat="server">
    <title>ASP.NET Example</title>
</head>
<body>
        <form id="form1" runat="server">

            <p>Show all employees with the following title:</p>

            <asp:SqlDataSource id="SqlDataSource1" runat="server" ConnectionString="<%$ ConnectionStrings:mySQLConnectionString%>"
                SelectCommand="SELECT * FROM tblmovie"
                FilterExpression="MovieID='{0}' or MovieName Like '%'{1}'%' and {2} Like '%'{3}'%'">
                <FilterParameters>
                      <asp:ControlParameter Name="MovieID"  ControlId="DropDownList1" PropertyName="SelectedValue"/>
                      <asp:ControlParameter Name="MovieName" ControlId="DropDownList2" PropertyName="SelectedValue"/>                         
                      <asp:ControlParameter Name="Search" ControlId="DropDownList3" PropertyName="SelectedValue"/>         
                      <asp:ControlParameter Name="Search1" ControlId="txtSearch" PropertyName="text" Type="String"/>  
                </FilterParameters>
            </asp:SqlDataSource>

<table style="width: 650px" border="0" cellpadding="0" cellspacing="1" >
<tr>

<td style="width: 150px;">
Movie ID
 <asp:DropDownList id="DropDownList1" runat="server" AutoPostBack="True">
                    <asp:ListItem Value="888">Please Select...</asp:ListItem>            
                <asp:ListItem>1</asp:ListItem>
                <asp:ListItem>2</asp:ListItem>
                <asp:ListItem>3</asp:ListItem>
            </asp:DropDownList>
</td>
<td style="width: 150px;">
Movie Name
 <asp:DropDownList
                id="DropDownList2"
                runat="server"
                AutoPostBack="True">    
                 <asp:ListItem Value="999">Please Select...</asp:ListItem>              
                <asp:ListItem>1</asp:ListItem>
                <asp:ListItem>2</asp:ListItem>
                <asp:ListItem>3</asp:ListItem>
            </asp:DropDownList>
</td>

<td style="width: 150px;">
Search
        <asp:TextBox ID="txtSearch" runat="server" AutoPostBack="True" />
</td>
<td style="width: 150px;">
Where
<asp:DropDownList  id="DropDownList3" runat="server" AutoPostBack="True">
                <asp:ListItem>Please Select...</asp:ListItem>            
                <asp:ListItem>MovieName</asp:ListItem>          
                <asp:ListItem>MovieID</asp:ListItem>            
                <asp:ListItem>Oscars</asp:ListItem>                      
</asp:DropDownList>
</td>
</tr>
<tr><td colspan="4">
<p>
</p>
<p></p>
</td></tr>
<tr>
 <td colspan="4">
            <asp:GridView  id="GridView1" runat="server" DataSourceID="SqlDataSource1" AutoGenerateColumns="False"  Width="600px">
                <columns>                 
                    <asp:BoundField HeaderText="Movie Name" DataField="MovieName"  />
                    <asp:BoundField HeaderText="MovieID" DataField="MovieID" />
                    <asp:BoundField HeaderText="Release Date" DataField="ReleaseDate" />
                     <asp:BoundField HeaderText="Oscars" DataField="Oscars" />
                </columns>
            </asp:GridView>
   </td>
   </tr>     
   </table>  
 </form>
    </body>
</html>

Answer 1

 FilterExpression="MovieID={0} or MovieName Like '%{1}%' or Oscars={2}  Where {3} Like '% txtSearch.text %'">

对我来说很奇怪。

FilterExpression =“MovieID = {0}或MovieName赞'％{1}％'或奥斯卡= {2} 其中 {3}赞'％txtSearch.text％'”＆gt; < / p>

我不认为“Where”这个词应该在那里？它应该是“AND”还是“OR”？

对我而言，似乎在过滤器表达式的开头有一个隐含的（你不必键入的）“WHERE”。

ControlParameter - 语法错误：'Where'运算符后缺少操作数

1 个答案: