如何将过滤器表达式应用于gridview？

Question

我有这个网格视图和一个从数据库中获取的过滤器表达式。 现在我想将过滤器表达式应用于网格，以便对网格中的数据进行排序。 条件中的列与网格的列匹配。这不是问题。

我可以设置 grid.FilterExpression = filter ，但是如何像过滤条件一样将值排序到网格？

Answer 1

代码： 用于填充下拉列表的 HTML 标记 全部

<asp:SqlDataSource ID="sqlDataSourceCity" runat="server" 
ConnectionString="<%$ ConnectionStrings:northWindConnectionString %>" 
SelectCommand="SELECT DISTINCT City FROM Customers">
</asp:SqlDataSource>


<asp:DropDownList ID="ddlCountry" runat="server" 
                  AppendDataBoundItems="True" 
                  AutoPostBack="True" 
                  DataSourceID="sqlDataSourceCountry" 
                  DataTextField="Country" 
                  DataValueField="Country" Width="100px">
<asp:ListItem Value="%">All</asp:ListItem>
</asp:DropDownList>


<asp:SqlDataSource ID="sqlDataSourceCountry" runat="server" 
ConnectionString="<%$ ConnectionStrings:northWindConnectionString %>" 
SelectCommand="SELECT DISTINCT [Country] FROM [Customers]">

带有过滤器表达式的gridview和sqldatasource的HTML标记

<asp:GridView ID="GridView1" runat="server" 
              AllowPaging="True" 
              DataSourceID="sqlDataSourceGridView" 
              AutoGenerateColumns="False"
              CssClass="GridViewStyle" 
              GridLines="None" Width="650px" 
              ShowHeader="false">
<Columns>
<asp:BoundField DataField="CustomerID" HeaderText="Customer ID"/>
<asp:BoundField DataField="CompanyName" HeaderText="Company"/>
<asp:BoundField DataField="ContactName" HeaderText="Name"/>
<asp:BoundField DataField="City" HeaderText="city"/>
<asp:BoundField DataField="Country" HeaderText="Country"/>
</Columns>
</asp:GridView>


<asp:SqlDataSource ID="sqlDataSourceGridView" 
                   runat="server" 
ConnectionString="<%$ ConnectionStrings:northWindConnectionString %>" 
SelectCommand="SELECT [CustomerID], [CompanyName], [ContactName], 
[City], [Country] FROM [Customers]" 
FilterExpression="[City] like '{0}%' and [Country] like '{1}%'">
<FilterParameters>
<asp:ControlParameter ControlID="ddlCity" Name="City" 
                      PropertyName="SelectedValue" 
                      Type="String" />
<asp:ControlParameter ControlID="ddlCountry" Name="Country" 
                      PropertyName="SelectedValue" 
                      Type="String" />
</FilterParameters>
</asp:SqlDataSource>

来源：-http://csharpdotnetfreak.blogspot.com/2011/04/gridview-filterexpression-dropdownlist.html

Answer 2

我建议你阅读这篇有用的文章

http://documentation.devexpress.com/#AspNet/DevExpressWebASPxGridViewASPxGridView_FilterExpressiontopic