编辑:在 Felix 的帮助下自己解决了这个问题(见下面的答案)
我正在尝试使用 SelectCommand 向 GridView 添加一些基本的搜索/过滤功能。更改 DropdownList 并单击按钮后,SelectCommand
应随着添加SelectParameter
.
问题是,一旦更改SelectCommand
并添加适当的SelectParameter
,只有第一页完美显示,显示正确的过滤结果。尝试更改页面(或排序)会引发 Oracle 错误
(Sys.WebForms.PageRequestManagerServerErrorException:ORA-01036:非法变量名称/编号)。
删除过滤(从而恢复 SelectCommand 并删除 SelectParameter)时,分页/排序工作正常。
.ascx 代码:
(请注意,owner_ddl
DropdownList 是用单独的代码隐藏方法中的值填充的)
<asp:DropDownList ID="owner_ddl" runat="server">
<asp:ListItem Value="*">All</asp:ListItem>
</asp:DropDownList>
 
<asp:Button ID="filter_btn" runat="server" Text="Filter" OnClick="filter_btn_Click" />
<br />
<br />
<asp:GridView ID="workbasket_gv" runat="server" AllowPaging="True"
AllowSorting="True" PagerSettings-Mode="NextPreviousFirstLast" PageSize="20"
AutoGenerateColumns="False" DataKeyNames="INCIDENT_ID" DataSourceID="sqlIncident"
EmptyDataText="No incidents meet this criteria" Width="90%">
<Columns>
<asp:CommandField ShowSelectButton="True" ButtonType="Button" SelectText="View">
<ItemStyle Width="50px" />
</asp:CommandField>
<asp:BoundField DataField="INCIDENT_ID" HeaderText="ID" ReadOnly="True" SortExpression="INCIDENT_ID">
<ItemStyle Width="50px" />
</asp:BoundField>
<asp:BoundField DataField="OWNER" HeaderText="Owner" SortExpression="OWNER">
<ItemStyle Width="100px" />
</asp:BoundField>
<asp:BoundField DataField="TITLE" HeaderText="Title" SortExpression="TITLE" />
<asp:BoundField DataField="DATE_RAISED" HeaderText="Date Raised" SortExpression="DATE_RAISED" DataFormatString="{0:g}">
<ItemStyle Width="200px" />
</asp:BoundField>
</Columns>
<PagerSettings Mode="NextPreviousFirstLast" Position="TopAndBottom" FirstPageText="<< First"
LastPageText="Last >>" NextPageText="Next >" PreviousPageText="< Prev">
</PagerSettings>
<PagerStyle HorizontalAlign="Center" />
</asp:GridView>
<asp:SqlDataSource ID="sqlIncident" runat="server" ConnectionString="Data Source=dbmisc89_dbmisc89.w34.bmw.uk;Persist Security Info=True;User ID=W50XS001_W;Password=sales_2;"
ProviderName="System.Data.OracleClient" SelectCommand="SELECT INCIDENT_ID, OWNER, TITLE, DATE_RAISED FROM INCIDENT_TBL WHERE TITLE IS NOT NULL ORDER BY DATE_RAISED DESC">
</asp:SqlDataSource>
代码隐藏:
protected void filter_btn_Click(object sender, EventArgs e)
{
if (owner_ddl.SelectedValue != "*")
{
// Defined owner
string sql = "SELECT INCIDENT_ID, OWNER, TITLE, DATE_RAISED FROM INCIDENT_TBL WHERE TITLE IS NOT NULL AND OWNER=:OWNER ORDER BY DATE_RAISED DESC";
sqlIncident.SelectCommand = sql;
ControlParameter param = new ControlParameter("OWNER", System.Data.DbType.String, "owner_ddl", "SelectedValue");
sqlIncident.SelectParameters.Add(param);
}
else
{
// All owners (Remove variable)
string sql = "SELECT INCIDENT_ID, OWNER, TITLE, DATE_RAISED FROM INCIDENT_TBL WHERE TITLE IS NOT NULL ORDER BY DATE_RAISED DESC";
sqlIncident.SelectCommand = sql;
sqlIncident.SelectParameters.Clear();
}
workbasket_gv.DataBind();
}