动态指定任意类型的ObjectDataSource对象的查询参数

<asp:ObjectDataSource ID="DataSource" runat="server" SelectMethod="SelectDatas"
TypeName="MilitaryShopWeb.Admin.SystemConfig.SysLog" DataObjectTypeName="MilitaryShopModel.Log" EnablePaging="True"
MaximumRowsParameterName="maxRows" StartRowIndexParameterName="startIndex" SelectCountMethod="CountAll" DeleteMethod="DeleteData">
<SelectParameters>
<asp:ControlParameter ControlID="ddlCate" PropertyName="SelectedValue" Name="cate" />
<asp:ControlParameter ControlID="ddlArea" PropertyName="SelectedValue" Name="area" />
<asp:ControlParameter ControlID="tbBeginTime" PropertyName="Text" Name="begintime" />
<asp:ControlParameter ControlID="tbEndTime" PropertyName="Text" Name="endtime" />
</SelectParameters>
</asp:ObjectDataSource>

public List<Log> SelectDatas(int startIndex, int maxRows, string cate, string area, string begintime, string endtime)
{
int itemCount;
int pageIndex = 1;
if (startIndex > 0)
{
pageIndex = (startIndex) / PageSize + 1;
}

LogBll bll = new LogBll();
List<ICriterion> query = new List<ICriterion>();
ICriterion[] expression = null;
if (cate != "-1")
{
query.Add(Restrictions.Eq("Logtype", cate));
}
if (area != "-1")
{
query.Add(Restrictions.Eq("Applicationarea", area));
}
if (begintime != null && begintime.Trim().Length > 0)
{
query.Add(Restrictions.Ge("Logtime", DateTime.Parse(begintime.Trim())));
}
if (endtime != null && endtime.Trim().Length > 0)
{
query.Add(Restrictions.Le("Logtime", DateTime.Parse(endtime.Trim())));
}

if (query.Count > 0)
{
expression = query.ToArray();
}

try
{
List<Log> list = bll.GetProducts(expression, pageIndex, maxRows, out itemCount);
ViewState["ITEMCOUNT"] = itemCount;
return list;
}
catch (Exception ex)
{
Log log = new Log(LogType.Error.ToString(), ex.Message, DateTime.Now, ApplicationArea.SysLogManage.ToString(), ex.StackTrace);
ApplicationLog.Write(log);
}

return null;
}

public static void DeleteData(Log obj)
{
try
{
LogBll bll = new LogBll();
bll.Delete(obj.Id);
ScriptHelper.ShowMessage("删除成功！");
}
catch (Exception ex)
{
Log log = new Log(LogType.Error.ToString(), ex.Message, DateTime.Now, ApplicationArea.ProductCategoriesList.ToString(), ex.StackTrace);
ApplicationLog.Write(log);
ScriptHelper.ShowMessage("删除失败！请查看数据库日志以确定失败原因。");
}
}

public int CountAll(string cate, string area, string begintime, string endtime)
{
return Convert.ToInt32(ViewState["ITEMCOUNT"] ?? 0);
}

private void RefreshData()
{
lvList.DataSourceID = DataSource.ID;
}

protected void btDoQuery_Click(object sender, EventArgs e)
{
RefreshData();
}

protected void btAll_Click(object sender, EventArgs e)
{
this.ddlArea.SelectedValue = "-1";
this.ddlCate.SelectedValue = "-1";
this.tbBeginTime.Text = string.Empty;
this.tbEndTime.Text = string.Empty;
RefreshData();
}