I've got a middle tier data object that I'm binding a gridview to, and
I'm having some problems with the check box, and having it enabled.
Let'd start with the middle tier object (and the corresponding
collection). The object is simple - it's got some properties (only one
has a setter), and a constructor.
public class Info
{
private int _ID;
private DateTime _createDate;
private int _Age;
private bool _selected;
public int ID
{
get
{
return ID;
}
}
public DateTime CreateDate
{
get
{
return _createDate;
}
}
public int Age
{
get
{
return _Age;
}
}
public bool Selected
{
get
{
return _selected;
}
set
{
_selected = value;
}
}
public Info( int ID, DateTime CreateDate, int Age)
{
_ID = ID;
_createDate = CreateDate;
_Age = Age;
_selected = false;
}
}
There's also an object InfoList that inherits from the generic list
List<Info>, basically what happens is that in it's constuctor it walks
a dataset from another object and populates itself with Info objects
public class InfoList:List<Info>
{
public InfoList():this((true))
{
}
public InfoList(bool LoadDefaultData)
{
if (LoadDefaultData)
{
InfoBase baseDS = new InfoBase();
DataTable tempTable = baseDS.Tables[0];
foreach (DataRow tempRow in tempTable.Rows)
{
Info tempInfo = new
Info(Convert.ToInt32(tempRow["ID"])
,
Convert.ToDateTime(tempRow["CreateDate"])
,
Convert.ToInt32(tempRow["Age"]));
this.Add(tempInfo);
}
}
}
public List<InfoSortList(int maximumRows, int startRowIndex,
string SortExpression){
// Code left out for brevity, this is the Select method used
by the gridview
}
public int GetCount(){
return this.Count;
}
}
Here's the Gridview code
<asp:GridView ID="GridView1" runat="server" AllowPaging="True"
AutoGenerateColumns="False"
DataSourceID="UnsoldInventory" Width="725px" CellPadding="0"
BorderWidth="0px"
AllowSorting="True" PageSize="10"
EnableSortingAndPagingCallbacks="True"
EnableViewState="False" HorizontalAlign="Left" ShowFooter="True">
<Columns>
<asp:CheckBoxField DataField="Selected" Text="Buy Now!" >
<ItemStyle CssClass="bt" HorizontalAlign="Center" />
</asp:CheckBoxField>
<asp:BoundField DataField="ID" Visible="false">
<ItemStyle CssClass="bt" HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="CreateDate" HeaderText="Create Date"
SortExpression="CreateDate" ReadOnly="True" >
<ItemStyle CssClass="bt" HorizontalAlign="Center" />
</asp:BoundField>
<asp:BoundField DataField="Age" HeaderText="Create Date"
SortExpression="Age" ReadOnly="True" >
<ItemStyle CssClass="bt" HorizontalAlign="Center" />
</asp:BoundField>
</Columns>
<RowStyle BackColor="White" />
<HeaderStyle CssClass="ftt" HorizontalAlign="Center" />
<SelectedRowStyle ForeColor="Red" Font-Bold="False"
BackColor="#BBBBBB"></SelectedRowStyle>
<AlternatingRowStyle BackColor="#EDEDED" />
<PagerSettings Mode="NumericFirstLast" Position="TopAndBottom" />
<PagerStyle ForeColor="Black" HorizontalAlign="Right"
BackColor="#C6C3C5" />
</asp:GridView>
<%--<i>You are viewing page
<%=GridView1.PageIndex + 1%>
of
<%=GridView1.PageCount%>
</i>--%>
<asp:ObjectDataSource ID="UnsoldInventory" runat="server"
SelectMethod="SortList"
TypeName="InfoList" EnablePaging="true"
SortParameterName="SortExpression" SelectCountMethod="getCount" >
</asp:ObjectDataSource>
So my question is this: I need the check boxes tied to the Selected
property of the Info object to be able to be checked and unchecked, so
I can know which items the end user wants. I don't want to have to have
the user edit one row at a time, and I've got
EnableSortingAndPagingCallbacks="True" on which prevents me from using
a template - I get an error message about Templates not being supported
- If I turn off the EnableSortingAndPagingCallbacks then the paging and
sorting quits working.
I've been unable to find an example for doing this, I find it hard to
beleive that no one at MS thought people would want this functionality.
BTW this is .NET 2.0 if that matters.
Any ideas?
Thanks.
