问题没有按照我想要的方式解决,但我继续感谢:ŁukaszW.pl 他的时间和精力。
我正在使用gridview控件和linqdatasource,它一切正常,我添加了searchBySubject的功能,我添加了WhereParameters,而不是绑定我的gridview(见下面的代码)但不知何故它没有返回任何行,我看到我有基于我正在搜索的行。
protected void btnSearch_Click(object sender, EventArgs e)
{
this.LinqDataSource1.WhereParameters["Subject"].DefaultValue = this.txtSubject.Text;
this.GridView1.DataBind();
}
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="LinqDataSource1"
EmptyDataText="There are no data records to display.">
<Columns>
<asp:BoundField DataField="UserID" HeaderText="UserID" ReadOnly="True"
SortExpression="UserID" />
<asp:BoundField DataField="Username" HeaderText="Username"
SortExpression="Username" />
<asp:BoundField DataField="FirstName" HeaderText="FirstName"
SortExpression="FirstName" />
<asp:BoundField DataField="LastName" HeaderText="LastName"
SortExpression="LastName" />
<asp:BoundField DataField="Email" HeaderText="Email" SortExpression="Email" />
</Columns>
</asp:GridView>
<asp:LinqDataSource ID="LinqDataSource1" runat="server"
ContextTypeName="MyDataContextDataContext"
onselecting="LinqDataSource_Selecting" >
<WhereParameters>
<asp:Parameter Name="Subject" />
</WhereParameters>
</asp:LinqDataSource>
public List<Reporter> GetInquiries()
{
using (MyDataContextDataContext dc = conn.GetContext())
{
var loadAll = (from spName in dc.spReporter()
select spName);
List<Reporter> reporterList = new List<Reporter>();
foreach (var item in loadAll)
{
reporterList.Add(new Reporter(item.Id, item.InqDate, item.Subject));
}
return reporterList;
}
错误:
The query results cannot be enumerated more than once